1
FEATURES
APPLICATIONS
DESCRIPTION
VIN
1
8
6
7
3 2
9
5
10
4
10 mH
EN
ILIM
SYNC
GND FC
PG
PGND
FB
L
TPS6200x
†
10 mF
VO=0.8V
toVI
PG
0.1 mF
10 mF
VI=2V
to5.5V
†WithVO≥1.8 V;Co=10 mF,VO<1.8V;Co=47 mF
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
Efficiency − %
IO− LoadCurrent − mA
VI=3.6V,
VO=2.5V
SYNC=Low
SYNC=High
EFFICIENCY
vs
LOADCURRENT
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........................................................................................................................................... SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008
HIGH-EFFICIENCY STEP-DOWN LOW POWER DC-DC CONVERTER
•High-Efficiency Synchronous Step-Down •Low-Noise Operation Antiringing Switch andConverter With Greater Than 95% Efficiency PFM/PWM Operation Mode•2 V to 5.5 V Operating Input Voltage Range •Internal Softstart•Adjustable Output Voltage Range From 0.8 V •50- µA Quiescent Current (TYP)to V
I
•Available in the 10-Pin Microsmall Outline•Fixed Output Voltage Options Available in Package (MSOP)0.9 V, 1 V, 1.2 V, 1.5 V, 1.8 V, 1.9 V, 2.5 V, and
•Evaluation Module Available3.3 V•Synchronizable to External Clock Signal up to1 MHz
•Low-Power CPUs and DSPs•Up to 600 mA Output Current
•Cellular Phones•Organizers, PDAs, and Handheld PCs•Pin-Programmable Current Limit
•MP-3 Portable Audio Players•High Efficiency Over a Wide Load Current
•Digital CamerasRange in Power Save Mode
•USB-Based DSL Modems and Other Network•100% Maximum Duty Cycle for Lowest
Interface CardsDropout
The TPS6200x devices are a family of low-noise synchronous step-down dc-dc converters that are ideally suitedfor systems powered from a 1-cell Li-ion battery or from a 2- to 3-cell NiCd, NiMH, or alkaline battery. TheTPS6200x operates typically down to an input voltage of 1.8 V, with a specified minimum input voltage of 2 V.
Figure 1. Figure 2. Typical Application Circuit for Fixed OutputVoltage Option
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000 – 2008, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.
DESCRIPTION (CONTINUED)
1
2
3
4
5
10
9
8
7
6
MSOP(DGS)PACKAGE
(TOPVIEW)
VIN
FC
GND
PG
FB
PGND
L
EN
SYNC
ILIM
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The TPS6200x is a synchronous current-mode PWM converter with integrated – and P-channel power MOSFETswitches. Synchronous rectification is used to increase efficiency and to reduce external component count. Toachieve the highest efficiency over a wide load current range, the converter enters a power-savingpulse-frequency modulation (PFM) mode at light load currents. Operating frequency is typically 750 kHz, allowingthe use of small inductor and capacitor values. The device can be synchronized to an external clock signal in therange of 500 kHz to 1 MHz. For low-noise operation, the converter can be operated in the PWM mode and theinternal antiringing switch reduces noise and EMI. In the shutdown mode, the current consumption is reduced toless than 1 µA. The TPS62000 is available in the 10-pin (DGS) microsmall outline package (MSOP). The deviceoperates over a free-air temperature range of – 40 ° C to 85 ° C.
AVAILABLE OPTIONS
PACKAGE
(1)
MARKINGT
A
VOLTAGE OPTIONS
MSOP DGS
Adjustable TPS62000DGS AIH0.9 V TPS62001DGS AII1 V TPS62002DGS AIJ1.2 V TPS62003DGS AIK– 40 ° C to 85 ° C 1.5 V TPS62004DGS AIL1.8 V TPS62005DGS AIM1.9 V TPS62008DGS AJI2.5 V TPS62006DGS AIN3.3 V TPS62007DGS AIO
(1) For shipment quantities and additional package information see the Package Option Addendum at theend of the data sheet.
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FUNCTIONAL BLOCK DIAGRAM
PFM/PWM
Control Logic
Current Limit
Logic
_
+
Compensation
Soft
Start
Slope Compensation
PFM/PWM
Mode Select
PFM/PWM
Comparator
Error Amplifier
_
+
Current
Sense
Driver
Shoot-Through
Logic
_
+
Undervoltage
Lockout
Bias Supply
10 Ω
_
+Vref = 0.45 V
R2
R1
R1 + R2 ≈ 1 MΩ
Power Good
Sync
+
Oscillator _
+
Load Comparator Current Sense
+
Offset
Antiringing
FB
N-Channel
Power MOSFET
P-Channel
Power MOSFET
L
PGND
EN
FB
PG FC (See Note B) VIN
GND SYNC ILIM
EN
(See
Note A)
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A. The adjustable output voltage version does not use the internal feedback resistor divider. The FB pin is directlyconnected to the error amplifier.B. Do not connect the FC pin to an external power source
PIN FUNCTIONS
PIN
I/O DESCRIPTIONNAME NO.
Enable. A logic high enables the converter, logic low forces the device into shutdown mode reducing the supplyEN 8 I
current to less than 1 µA.Feedback pin for the fixed output voltage option. For the adjustable version an external resistive divider isFB 5 I
connected to FB. The internal voltage divider is disabled for the adjustable version.Supply bypass pin. A 0.1 µF coupling capacitor should be connected as close as possible to this pin for goodFC 2
high frequency input voltage supply filtering.GND 3 Ground
Switch current limit. Connect ILIM to GND to set the switch current limit to typically 600 mA, or connect this pinILIM 6 I
to V
IN
to set the current limit to typically 1200 mA.L 9 I/O Connect the inductor to this pin. L is the switch pin connected to the drain of the internal power MOSFETS.Power good comparator output. This is an open-drain output. A pullup resistor should be connected betweenPG 4 O
PG and V
O
. The output goes active high when the output voltage is greater than 92% of the nominal value.PGND 10 Power ground. Connect all power grounds to PGND.Input for synchronization to external clock signal. Synchronizes the converter switching frequency to anexternal clock signal with CMOS level:SYNC 7 I
SYNC = HIGH: Low-noise mode enabled, fixed frequency PWM operation is forcedSYNC = LOW (GND): Power save mode enabled, PFM/PWM mode enabled.V
IN
1 I Supply voltage input
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DETAILED DESCRIPTION
Operation
100% Duty Cycle Operation
Synchronization, Power Save Mode and Forced PWM Mode
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
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The TPS6200x is a step down converter operating in a current mode PFM/PWM scheme with a typical switchingfrequency of 750 kHz.
At moderate to heavy loads, the converter operates in the pulse width modulation (PWM) and at light loads theconverter enters a power save mode (pulse frequency modulation) to keep the efficiency high.
In the PWM mode operation, the part operates at a fixed frequency of 750 kHz. At the beginning of each clockcycle, the high side P-channel MOSFET is turned on. The current in the inductor ramps up and is sensed via aninternal circuit. The high side switch is turned off when the sensed current causes the PFM/PWM comparator totrip when the output voltage is in regulation or when the inductor current reaches the current limit (set by ILIM).After a minimum dead time preventing shoot through current, the low side N-channel MOSFET is turned on andthe current ramps down again. As the clock cycle is completed, the low side switch is turned off and the nextclock cycle starts.
In discontinuous conduction mode (DCM), the inductor current ramps to zero before the end of each clock cycle.In order to increase the efficiency the load comparator turns off the low side MOSFET before the inductor currentbecomes negative. This prevents reverse current flowing from the output capacitor through the inductor and lowside MOSFET to ground that would cause additional losses.
As the load current decreases and the peak inductor current does not reach the power save mode threshold oftypically 120 mA for more than 15 clock cycles, the converter enters a pulse frequency modulation (PFM) mode.
In the PFM mode, the converter operates with:•Variable frequency•Constant peak current that reduces switching losses•Quiescent current at a minimum
Thus maintaining the highest efficiency at light load currents. In this mode, the output voltage is monitored withthe error amplifier. As soon as the output voltage falls below the nominal value, the high side switch is turned onand the inductor current ramps up. When the inductor current reaches the peak current of typical: 150 mA +50 mA/V × (V
I
– V
O
), the high side switch turns off and the low side switch turns on. As the inductor currentramps down, the low side switch is turned off before the inductor current becomes negative which completes thecycle. When the output voltage falls below the nominal voltage again, the next cycle is started.
The converter enters the PWM mode again as soon as the output voltage can not be maintained with the typicalpeak inductor current in the PFM mode.
The control loop is internally compensated reducing the amount of external components.
The switch current is internally sensed and the maximum current limit can be set to typical 600 mA by connectingILIM to ground; or, to typically 1.2 A by connecting ILIM to V
IN
.
As the input voltage approaches the output voltage and the duty cycle exceeds typical 95%, the converter turnsthe P-channel high side switch continuously on. In this mode, the output voltage is equal to the input voltageminus the voltage drop across the P-channel MOSFET.
If no clock signal is applied, the converter operates with a typical switching frequency of 750 kHz. It is possible tosynchronize the converter to an external clock within a frequency range from 500 kHz to 1000 kHz. The deviceautomatically detects the rising edge of the first clock and is synchronizes immediately to the external clock. Ifthe clock signal is stopped, the converter automatically switches back to the internal clock and continuesoperation without interruption. The switch over is initiated if no rising edge on the SYNC pin is detected for aduration of four clock cycles. Therefore, the maximum delay time can be 8 µs in case the internal clock has aminimum frequency of 500 kHz.
In case the device is synchronized to an external clock, the power save mode is disabled and the device stays inforced PWM mode.
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Low Noise Antiringing Switch
Soft Start
Enable
Undervoltage Lockout
Power Good Comparator
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Connecting the SYNC pin to the GND pin enables the power save mode. The converter operates in the PWMmode at moderate to heavy loads and in the PFM mode during light loads maintaining high efficiency over a wideload current range.
Connecting the SYNC pin to the V
IN
pin forces the converter to operate permanently in the PWM mode even atlight or no load currents. The advantage is the converter operates with a fixed switching frequency that allowssimple filtering of the switching frequency for noise sensitive applications. In this mode, the efficiency is lowercompared to the power save mode during light loads (see Figure 1 ).
It is possible to switch from forced PWM mode to the power save mode during operation.
The flexible configuration of the SYNC pin during operation of the device allows efficient power management byadjusting the operation of the TPS6200x to the specific system requirements.
An antiringing switch is implemented in order to reduce the EMI radiated from the converter during discontinuousconduction mode (DCM). In DCM, the inductor current ramps to zero before the end of each switching period.The internal load comparator turns off the low side switch at that instant thus preventing the current flowingbackward through the inductance which increases the efficiency. An antiringing switch across the inductorprevents parasitic oscillation caused by the residual energy stored in the inductance (see Figure 12 ).
NOTE:
The antiringing switch is only activated in the fixed output voltage versions. It is notenabled for the adjustable output voltage version TPS62000.
As the enable pin (EN) goes high, the soft-start function generates an internal voltage ramp. This causes thestart-up current to slowly rise preventing output voltage overshoot and high inrush currents. The soft-startduration is typical 1 ms (see Figure 13 ). When the soft-start function is completed, the error amplifier isconnected directly to the internal voltage reference.
Logic low on EN forces the TPS6200x into shutdown. In shutdown, the power switch, drivers, voltage reference,oscillator, and all other functions are turned off. The supply current is reduced to less than 1 µA in the shutdownmode.
An undervoltage lockout circuit provides the save operation of the device. It prevents the converter from turningon when the voltage on V
IN
is less than typically 1.6 V.
The power good (PG) comparator has an open drain output capable of sinking typically 10 µA. The PG is onlyactive when the device is enabled (EN = high). When the device is disabled (EN = low), the PG pin is highimpedance.
The PG output is only valid after a 100 µs delay after the device is enabled and the supply voltage is greaterthan 1.2 V. This is only important in cases where the pullup resistor of the PG pin is connected to an externalvoltage source which might cause an initial spike (false high signal) within the first 100 µs after the input voltageexceeds 1.2 V. This initial spike can be filtered with a small R-C filter to avoid false power good signals duringstart-up.
If the PG pin is connected to the output of the TPS62000 with a pullup resistor, no initial spike (false high signal)occurs and no precautions have to be taken during start-up.
The PG pin becomes active high when the output voltage exceeds typically 94.5% of its nominal value. Leavethe PG pin unconnected when not used.
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No Load Operation
ABSOLUTE MAXIMUM RATINGS
DISSIPATION RATINGS
RECOMMENDED OPERATING CONDITIONS
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In case the converter operates in the forced PWM mode and there is no load connected to the output, theconverter will regulate the output voltage by allowing the inductor current to reverse for a short period of time.
over operating free-air temperature range (unless otherwise noted)
(1)
VALUE UNIT
Supply voltages on pin VIN and FC
(2)
– 0.3 to 6 VVoltages on pins EN, ILIM, SYNC, PG, FB, L
(2)
– 0.3 to V
IN
+ 0.3 VPeak switch current 1.6 AContinuous power dissipation See Dissipation Rating TableT
J
Operating junction temperature range – 40 to 150 ° CT
stg
Storage temperature range – 65 to 150 ° CLead temperature (soldering, 10 sec) 260 ° C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratingsonly, and functional operation of the device at these or any other conditions beyond those indicated under recommended operatingconditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2) All voltage values are with respect to network ground terminal.
T
A
≤25 ° C DERATING FACTOR T
A
= 70 ° C T
A
= 85 ° CPACKAGE
(1)
POWER RATING T
A
= 25 ° C POWER RATING POWER RATING
10 pin MSOP 555 mW 5.56 mW/ ° C 305 mW 221 mW
(1) The thermal resistance junction to ambient of the 10-pin MSOP is 180 ° C/W. The device will not run into thermal limitations provided it isoperated within the specified range.
over operating free-air temperature range (unless otherwise noted)
MIN TYP MAX UNIT
V
I
Supply voltage 2 5.5 VV
O
Output voltage range for adjustable output voltage version 0.8 V
I
VI
O
Output current for 3-cell operation (V
I
≥2.5 V; L = 10 µH, f = 750 kHz) 600 mAI
O
Output current for 2-cell operation (V
I
≥2 V; L = 10 µH, f = 750 kHz) 200 mAL Inductor
(1)
(see Note 2) 10 µHC
I
Input capacitor
(1)
10 µFC
o
Output capacitor
(1)
(V
O
≥1.8 V) 10 µFC
o
Output capacitor
(1)
V
O
< 1.8 V) 47 µFT
A
Operating ambient temperature – 40 85 ° CT
J
Operating junction temperature – 40 125 ° C
(1) Refer to application section for further information.
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ELECTRICAL CHARACTERISTICS
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........................................................................................................................................... SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008
over recommended operating free-air temperature range, V
I
= 3.6 V, V
O
= 2.5 V, I
O
= 300 mA, EN = V
IN
, ILIM = V
IN
, T
A
=– 40 ° C to 85 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
I
O
= 0 mA to 600 mA 2.5 5.5V
I
Input voltage range VI
O
= 0 mA to 200 mA 2 5.5I
(Q)
Operating quiescent current I
O
= 0 mA, SYNC = GND (PFM-mode 50 75 µAenabled)I
(SD)
Shutdown current EN = GND 0.1 1 µA
ENABLE
V
IH
EN high-level input voltage 1.3 VV
IL
EN low level input voltage 0.4 VI
lkg
EN input leakage current EN = GND or V
IN
0.01 0.1 µAV
(UVLO)
Undervoltage lockout threshold 1.2 1.6 1.95 V
POWER SWITCH AND CURRENT LIMIT
V
I
= V
GS
= 3.6 V, I = 200 mA 200 280 410P-channel MOSFET on-resistance m ΩV
I
= V
GS
= 2 V, I = 200 mA 480P-channel leakage current V
DS
= 5.5 V 1 µAr
DS(on)
V
I
= V
GS
= 3.6 V, I
O
= 200 mA 200 280 410N-channel MOSFET on-resistance m ΩV
I
= V
GS
= 2 V, I
O
= 200 mA 500N-channel leakage current V
DS
= 5.5 V 1 µA2.5 V ≤V
I
≤5.5 V, ILIM = V
IN
800 1200 1600I
(LIM)
P-channel current limit mA2 V ≤V
I
≤5.5 V, ILIM = GND 390 600 900V
IH
ILIM high-level input voltage 1.3 VV
IL
ILIM low-level input voltage 0.4 VI
lkg
ILIM input leakage current ILIM = GND or V
IN
0.01 0.1 µA
POWER GOOD OUTPUT (see
(1)
)
V
(PG)
Power good threshold Feedback voltage falling 88% V
O
92% V
O
94% V
O
VPower good hysteresis 2.5% V
O
VV
OL
PG output low voltage V
(FB)
= 0.8 × V
O
nominal, I
(sink)
= 10 µA 0.3 VI
lkg
PG output leakage current V
(FB)
= V
O
nominal 0.01 1 µAMinimum supply voltage for valid 1.2 Vpower good signal
OSCILLATOR
f
s
Oscillator frequency 500 750 1000 kHzf
(SYNC)
Synchronization range CMOS-logic clock signal on SYNC pin 500 1000 kHzV
IH
SYNC high level input voltage 1.3 VV
IL
SYNC low level input voltage 0.4 VI
lkg
SYNC input leakage current SYNC = GND or V
IN
0.01 0.1 µADuty cycle of external clock signal 20% 60%
(1) Power good is not valid for the first 100 µs after EN goes high. Refer to the application section for more information.
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ELECTRICAL CHARACTERISTICS
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over recommended operating free-air temperature range, V
I
= 3.6 V, V
O
= 2.5 V, I
O
= 300 mA, EN = V
IN
, ILIM = V
IN
, T
A
=– 40 ° C to 85 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
O
Adjustable output voltage range TPS62000 0.8 5.5 V
V
ref
Reference voltage TPS6200x 0.45 V
V
I
= 2.5 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62000
adjustable
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 2.5 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62001
0.9 V
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 2.5 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62002
1 V
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 2.5 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62003
1.2 V
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 2.5 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62004V
O
Fixed output voltage
(1)
V1.5 V
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 2.5 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62005
1.8 V
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 2.5 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62008
1.9 V
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 2.7 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62006
2.5 V
10 mA < I
O
≤600 mA – 3% 3%
V
I
= 3.6 V to 5.5 V; 0 mA ≤I
O
≤600 mA – 3% 4%TPS62007
3.3 V
10 mA < I
O
≤600 mA – 3% 3%
Line regulation V
I
= V
O
+ 0.5 V (min. 2 V) to 5.5 V, I
O
= 10 mA 0.05 %/V
Load regulation V
I
= 5.5 V; I
O
= 10 mA to 600 mA 0.6%
V
I
= 5 V; V
O
= 3.3 V; I
O
= 300 mAηEfficiency 95%VI = 3.6 V; V
O
= 2.5 V; I
O
= 200 mA
Start-up time I
O
= 0 mA, time from active EN to V
O
0.4 2 ms
(1) The output voltage accuracy includes line and load regulation over the full temperature range, T
A
= – 40 ° C to 85 ° C.
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TYPICAL CHARACTERISTICS
TABLE OF GRAPHS
40
50
60
70
80
90
100
0.1 1 10 100 1000
VO=2.5V
VI=3.6V
Efficiency − %
IO− LoadCurrent − mA
VI=5V
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FIGURE
ηEfficiency vs Load current 3, 4, 5V
(drop)
Dropout voltage vs Load current 6I
Q
Operating quiescent current vs Input voltage (power save mode) 7vs Input voltage (forced PWM) 8f
OSC
Oscillator frequency vs Free-air temperature 9Load transient response 10Line transient response 11Power save mode operation 12Start-up vs Time 13V
O
Output voltage vs Load current 14
EFFICIENCY EFFICIENCYvs vsLOAD CURRENT LOAD CURRENT
Figure 3. Figure 4.
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I -OperatingQuescentCurrent- A
(Q) m
I -OperatingQuescentCurrent- A
(Q) m
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EFFICIENCY DROPOUT VOLTAGEvs vsLOAD CURRENT LOAD CURRENT
Figure 5. Figure 6.
OPERATING QUIESCENT CURRENT OPERATING QUIESCENT CURRENTvs vsINPUT VOLTAGE (POWER SAVE MODE) INPUT VOLTAGE (FORCED PWM)
Figure 7. Figure 8.
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200 s/divm
10 s/divm
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........................................................................................................................................... SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008
OSCILLATOR FREQUENCY
vsFREE-AIR TEMPERATURE LOAD TRANSIENT RESPONSE
Figure 9. Figure 10.
LINE TRANSIENT RESPONSE POWER SAVE MODE OPERATION
Figure 11. Figure 12.
Copyright © 2000 – 2008, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Link(s): TPS62000, TPS62001, TPS62003 TPS62004, TPS62005, TPS62006 TPS62007, TPS62008
EN
2 V/div
250 ms/div
VO
1V/div
PowerGood
1V/div
II
200 mA/div
2.45
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
0 100 200 300 400 500 600
− OutputVoltage − V
VO
IO− LoadCurrent − mA
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008 ...........................................................................................................................................
www.ti.com
START-UP
vs
TIME
Figure 13.
OUTPUT VOLTAGE
vsLOAD CURRENT
Figure 14.
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Product Folder Link(s): TPS62000, TPS62001, TPS62003 TPS62004, TPS62005, TPS62006 TPS62007, TPS62008
APPLICATION INFORMATION
ADJUSTABLE OUTPUT VOLTAGE VERSION
O
R1
V = 0.45 V 1 +
R2
æ ö
´ç ÷
è ø
(1)
47
2
(ff) o
1
C = for C F
30000 R1 m
p
<
´ ´
(2)
47
2 5
(ff) o
1
C = for C F
000 R1 m
p³
´ ´
(3)
VIN
1
8
6
7
3 2
9
5
10
4
L1 =10 mH
EN
ILIM
SYNC
GND FC
PG
PGND
FB
L
TPS62000
+
Co=10 mF
VO=2.5V/600mA
C3=0.1 mF
Ci=10 mF
VI=2.7Vto5.5V
R3=320kΩ
R1=820kΩC(ff) =
6.8pF
R2=180kΩ
+
PG
INDUCTOR SELECTION
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
www.ti.com
........................................................................................................................................... SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008
When the adjustable output voltage version (TPS62000DGS) is used, the output voltage is set by the externalresistor divider (see Figure 15 ).
The output voltage is calculated as:
With R1 + R2 ≤1 M Ω
R1 + R2 should not be greater than 1 MW because of stability reasons.
For stability reasons, a small bypass capacitor (Cff) is required in parallel to the upper feedback resistor, refer toFigure 15 . The bypass capacitor value can be calculated as:
R1 is the upper resistor of the voltage divider. For C
(ff)
, choose a value which comes closest to the computedresult.
Figure 15. Typical Application Circuit for Adjustable Output Voltage Option
A 10 µH minimum output inductor is used with the TPS6200x. Values larger than 22 µH or smaller than 10 µHmay cause stability problems because of the internal compensation of the regulator.
For output voltages greater than 1.8 V, a 22 µH inductance might be used in order to improve the efficiency ofthe converter.
After choosing the inductor value of typically 10 µH, two additional inductor parameters should be considered:first the current rating of the inductor and second the dc resistance.
The dc resistance of the inductance influences directly the efficiency of the converter. Therefore, an inductor withlowest dc resistance should be selected for highest efficiency.
In order to avoid saturation of the inductor, the inductor should be rated at least for the maximum output currentplus the inductor ripple current which is calculated as:
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2
O
I L
L O L(max) O(max)
V
1V I
I = V I I
Lf
-
D
D ´ = +
´
(4)
OUTPUT CAPACITOR SELECTION
1
2 3
O
O
I
RMS(C ) O
V
1V
I = V Lf
-
´ ´
´´
(5)
O
I
O O
O
V
1
V1
V = V ESR
L 8 Cf f
-æ ö
D ´ ´ +
ç ÷
´ ´ ´
è ø
(6)
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008 ...........................................................................................................................................
www.ti.com
Where:
ƒ = Switching frequency (750 kHz typical)L = Inductor valueΔI
L
= Peak-to-peak inductor ripple currentI
L(max)
= Maximum inductor current
The highest inductor current occurs at maximum V
I
.
A more conservative approach is to select the inductor current rating just for the maximum switch current of theTPS6200x which is 1.6 A with ILIM = V
IN
and 900 mA with ILIM = GND. See Table 1 for recommended inductors.
Table 1. Tested Inductors
OUTPUT CURRENT INDUCTOR VALUE COMPONENT SUPPLIER COMMENTS
0 mA to 600 mA 10 µH Coilcraft DO3316P-103 High efficiencyCoilcraft DT3316P-103
Sumida CDR63B-100
Sumida CDRH5D28-100
Coilcraft DO1608C-103 Smallest solutionSumida CDRH4D28-1000 mA to 300 mA 10 µH Coilcraft DO1608C-103 High efficiencyMurata LQH4C100K04 Smallest solution
For best performance, a low ESR output capacitor is needed. At output voltages greater than 1.8 V, ceramicoutput capacitors can be used to show the best performance. Output voltages below 1.8 V require a larger outputcapacitor and ESR value to improve the performance and stability of the converter.
Table 2. Capacitor Selection
OUTPUT VOLTAGE RANGE OUTPUT CAPACITOR OUTPUT CAPACITOR ESR
1.8 V ≤V
I
≤5.5 V C
o
≥10 µF ESR ≤120 m Ω
0.8 V ≤V
I
< 1.8 V C
o
≥47 µF ESR > 50 m Ω
See Table 3 for recommended capacitors.
If an output capacitor is selected with an ESR value ≤120 m Ω, its RMS ripple current rating always meets theapplication requirements. Just for completeness, the RMS ripple current is calculated as:
The overall output ripple voltage is the sum of the voltage spike caused by the output capacitor ESR plus thevoltage ripple caused by charge and discharging the output capacitor:
Where the highest output voltage ripple occurs at the highest input voltage V
I
.
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Product Folder Link(s): TPS62000, TPS62001, TPS62003 TPS62004, TPS62005, TPS62006 TPS62007, TPS62008
INPUT CAPACITOR SELECTION
O O
RMS O(max)
I I
V V
I = I 1
V V
æ ö
´ ´ -
ç ÷
è ø
(7)
The worst case RMS ripple current occurs at D = 0.5 and is calculated as:
O
RMS
I
I =
2
LAYOUT CONSIDERATIONS
VIN
1
8
6
7
3 2
9
5
10
4
L1
EN
ILIM
SYNC
GND FC
PG
PGND
FB
L
TPS62000
+
Co
VO
C3
Ci
VI
R3
R1 C(ff)
R2
+
PG
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
www.ti.com
........................................................................................................................................... SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008
Table 3. Tested Capacitors
CAPACITOR VALUE ESR/m ΩCOMPONENT SUPPLIER COMMENTS
10 µF 50 Taiyo Yuden JMK316BJ106KL Ceramic47 µF 100 Sanyo 6TPA47M POSCAP68 µF 100 Spraque 594D686X0010C2T Tantalum
Because of the nature of the buck converter having a pulsating input current, a low ESR input capacitor isrequired for best input voltage filtering and minimizing the interference with other circuits caused by high inputvoltage spikes.
The input capacitor should have a minimum value of 10 µF and can be increased without any limit for better inputvoltage filtering.
The input capacitor should be rated for the maximum input ripple current calculated as:
Ceramic capacitor show a good performance because of their low ESR value, and they are less sensitive againstvoltage transients compared to tantalum capacitors.
Place the input capacitor as close as possible to the input pin of the IC for best performance.
As for all switching power supplies, the layout is an important step in the design especially at high peak currentsand switching frequencies. If the layout is not carefully done, the regulator might show stability problems as wellas EMI problems.
Therefore, use wide and short traces for the main current paths as indicted in bold in Figure 16 . The inputcapacitor should be placed as close as possible to the IC pins as well as the inductor and output capacitor. Placethe bypass capacitor, C3, as close as possible to the FC pin. The analog ground, GND, and the power ground,PGND, need to be separated. Use a common ground node as shown in Figure 16 to minimize the effects ofground noise.
Figure 16. Layout Diagram
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TYPICAL APPLICATION
VIN
1
8
6
7
3 2
9
5
10
4
L1
22 mH
EN
ILIM
SYNC
GND FC
PG
PGND
FB
L
TPS62007DGS C2
10 mF
VO=3.3V/600mA
Power
Good
C3
0.1 mF
C1
10 mF
VI=5V
680kΩ
L1: SumdiaCDRH5D28-220
C1,C2: 10 mFCeramicTaiyoYuden
JMK316BJ106KL
C3: 0.1 mFCeramic
VIN
1
8
6
7
3 2
9
5
10
4
L1
10 mH
EN
ILIM
SYNC
GND FC
PG
PGND
FB
L
TPS62006DGS C2
10 mF
VO=2.5V/600mA
PowerGood
C3
0.1 mF
C1
10 mF
VI=2.7Vto4.2V
470kΩ
L1: SumdiaCDRH5D28-100
C1,C2: 10 mFCeramicTaiyoYuden
JMK316BJ106KL
C3: 0.1 mFCeramic
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008 ...........................................................................................................................................
www.ti.com
Figure 17. Standard 5 V to 3.3 V/600 mA Conversion; High Efficiency
Figure 18. Single Li-ion to 2.5 V/600 mA Using Ceramic Capacitors Only
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VIN
1
8
6
7
3 2
9
5
10
4
L1
10 mH
EN
ILIM
SYNC
GND FC
PG
PGND
FB
L
TPS62005DGS C2
10 mF
VO=1.8V/300mA
C3
0.1 mF
C1
10 mF
VI=2.5Vto4.2V
L1: MurataLQH4C100K04
C1,C2: 10 mFCeramicTaiyoYuden
JMK316BJ106KL
C3: 0.1 mFCeramic
VIN
1
8
6
7
3 2
9
5
10
4
L1
10 mH
EN
ILIM
SYNC
GND FC
PG
PGND
FB
L
TPS62003
+
C2
47 mF
VO=1.2V/200mA
C3
0.1 mF
C1
10 mF
VI=2Vto3.8V
L1: MurataLQH4C100K04
C1: 10 mFCeramicTaiyoYuden
JMK316BJ106KL
C2: Sanyo6TPA47M
C3: 0.1 mFCeramic
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
www.ti.com
........................................................................................................................................... SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008
NOTE: For low noise operation connect SYNC to V
IN
Figure 19. Single Li-ion to 1.8 V/300 mA; Smallest Solution Size
Figure 20. Dual Cell NiMH or NiCd to 1.2 V/200 mA; Smallest Solution Size
Copyright © 2000 – 2008, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Link(s): TPS62000, TPS62001, TPS62003 TPS62004, TPS62005, TPS62006 TPS62007, TPS62008
SumidaCDRH5D28-100
10 FCeramicTaiyo Yuden
JMK316BJ106KL
Sanyo6TPA47M
0.1 FCeramic
m
m
0.1 Fm
326kW524kW
47 Fm
470kW
820kW
10 Hm
(2)
10 Fm
TPS62000, TPS62001, TPS62003TPS62004, TPS62005, TPS62006TPS62007, TPS62008
SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008 ...........................................................................................................................................
www.ti.com
(1) Use a small R-C filter to filter wrong reset signals during output voltage transitions.(2) A large value is used for C(ff) to compensate for the parasitic capacitance introduced into the regulation loop by Q1.
Figure 21. Dynamic Output Voltage Programming As Used in Low Power DSP Applications
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PACKAGE OPTION ADDENDUM
www.ti.com 23-Jul-2011
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
TPS62000DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62000DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62000DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62000DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62000YZGR OBSOLETE DSBGA YZG 12 TBD Call TI Call TI
TPS62000YZGT OBSOLETE DSBGA YZG 12 TBD Call TI Call TI
TPS62001DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62001DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62001DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) Call TI Level-1-260C-UNLIM
TPS62001DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) Call TI Level-1-260C-UNLIM
TPS62002DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62002DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62002DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62002DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62003DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62003DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62003DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62003DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
PACKAGE OPTION ADDENDUM
www.ti.com 23-Jul-2011
Addendum-Page 2
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
TPS62004DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62004DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62004DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62004DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62005DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62005DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62005DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62005DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62006DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62006DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62006DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62006DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62007DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62007DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62007DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62007DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS62008DGS ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62008DGSG4 ACTIVE MSOP DGS 10 80 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
PACKAGE OPTION ADDENDUM
www.ti.com 23-Jul-2011
Addendum-Page 3
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
TPS62008DGSR ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
TPS62008DGSRG4 ACTIVE MSOP DGS 10 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-1-260C-UNLIM
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TPS62000, TPS62004, TPS62005, TPS62006, TPS62007 :
•Automotive: TPS62000-Q1, TPS62004-Q1, TPS62005-Q1, TPS62006-Q1, TPS62007-Q1
NOTE: Qualified Version Definitions:
•Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
TPS62000DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62001DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62002DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62003DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62004DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62005DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62006DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62007DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
TPS62008DGSR MSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 10-Feb-2011
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
TPS62000DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62001DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62002DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62003DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62004DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62005DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62006DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62007DGSR MSOP DGS 10 2500 346.0 346.0 29.0
TPS62008DGSR MSOP DGS 10 2500 346.0 346.0 29.0
PACKAGE MATERIALS INFORMATION
www.ti.com 10-Feb-2011
Pack Materials-Page 2
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