1
FEATURES
1
2
3
4
8
7
6
5
OUT
VCC
COMP
FB
GND
RT
DTC
SCP
D PACKAGE
(TOP VIEW)
DESCRIPTION
TL5001A-Q1
www.ti.com
.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
•Qualified for Automotive Applications•Complete PWM Power Control•3.6-V to 40-V Operation•Internal Undervoltage-Lockout Circuit•Internal Short-Circuit Protection•Oscillator Frequency: 20 kHz to 500 kHz•Variable Dead Time Provides Control OverTotal Range•± 3% Tolerance on Reference Voltage•Available in Q-Temperature Automotive– High-Reliability Automotive Applications– Configuration Control / Print Support– Qualification to Automotive Standards
The TL5001A incorporates on a single monolithic chip all the functions required for a pulse-width-modulation(PWM) control circuit. Designed primarily for power-supply control, the TL5001A contains an error amplifier, aregulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout (UVLO),short-circuit protection (SCP), and an open-collector output transistor. The TL5001A has a typical referencevoltage tolerance of ± 3%.
The error-amplifier common-mode voltage ranges from 0 V to 1.5 V. The noninverting input of the error amplifieris connected to a 1-V reference. Dead-time control (DTC) can be set to provide 0% to 100% dead time byconnecting an external resistor between DTC and GND. The oscillator frequency is set by terminating RT with anexternal resistor to GND. During low V
CC
conditions, the UVLO circuit turns the output off until V
CC
recovers to itsnormal operating range.
The TL5001A is characterized for operation from – 40 ° C to 125 ° C.
AVAILABLE OPTIONS
(1)
PACKAGED DEVICES
(2)
T
A
SMALL OUTLINE
(D)
(3)
– 40 ° C to 125 ° C TL5001AQDRQ1
(1) For the most current package and ordering information, see thePackage Option Addendum at the end of this document, or see theTI web site at www.ti.com .(2) Package drawings, thermal data, and symbolization are available atwww.ti.com/packaging .(3) The D package is available taped and reeled. Add the suffix R to thedevice type (e.g., TL5001ADR).
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 © 2005 – 2009, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.
SCHEMATIC FOR TYPICAL APPLICATION
TL5001A
FB
COMP
VO
DTC
RT
VI
+
SCP
VCC
+
TPS1101
GND
8
7
6
5
2
1
3
4
VO
FUNCTIONAL BLOCK DIAGRAM
GND
8
OUT
SCP
COMP
FB
5
3
4−
+
DTC
RT 67
Comparator 2
SCP
PWM/DTC
Comparator
OSC
Comparator 1
SCP
Amplifier
Error
UVLO
VCC21
1 V
1.5 V 1 V
Reference
Voltage
IDT
2.5 V
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ..............................................................................................................................................
www.ti.com
2Submit Documentation Feedback Copyright © 2005 – 2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
DETAILED DESCRIPTION
VOLTAGE REFERENCE
ERROR AMPLIFIER
To PWM
Comparator
Vref = 1 V
4
VI(FB)
3
+
−
R2
R1
COMP
FB
Compensation
Network
TL5001/A
GND
8
OSCILLATOR/PWM
DEAD-TIME CONTROL (DTC)
RDT +(Rt)1250) [D(Vosc max *Vosc min))Vosc min]
VRT ; VRT +1 V
(1)
TL5001A-Q1
www.ti.com
.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
A 2.5-V regulator operating from V
CC
is used to power the internal circuitry of the TL5001A and as a reference forthe error amplifier and SCP circuits. A resistive divider provides a 1-V reference for the error amplifiernoninverting input which typically is within 2% of nominal over the operating temperature range.
The error amplifier compares a sample of the dc-to-dc converter output voltage to the 1-V reference andgenerates an error signal for the PWM comparator. The dc-to-dc converter output voltage is set by selecting theerror-amplifier gain (see Figure 1 ), using the following expression:V
O
= (1 + R1/R2) (1 V)
Figure 1. Error-Amplifier Gain Setting
The error-amplifier output is brought out as COMP for use in compensating the dc-to-dc converter control loop forstability. Because the amplifier can only source 45 µA, the total dc-load resistance should be 100 k Ωor more.
The oscillator frequency (f
osc
) can be set between 20 kHz and 500 kHz by connecting a resistor between RT andGND. Acceptable resistor values range from 15 k Ωto 250 k Ω. The oscillator frequency can be determined byusing the graph shown in Figure 5 .
The oscillator output is a triangular wave with a minimum value of approximately 0.7 V and a maximum value ofapproximately 1.3 V. The PWM comparator compares the error-amplifier output voltage and the DTC inputvoltage to the triangular wave and turns the output transistor off whenever the triangular wave is greater than thelesser of the two inputs.
DTC provides a means of limiting the output-switch duty cycle to a value less than 100%, which is critical forboost and flyback converters. A current source generates a reference current (I
DT
) at DTC that is nominally equalto the current at the oscillator timing terminal (RT). Connecting a resistor between DTC and GND generates adead-time reference voltage (V
DT
), which the PWM/DTC comparator compares to the oscillator triangle wave asdescribed in the previous section. Nominally, the maximum duty cycle is 0% when VDT is 0.7 V or less and100% when V
DT
is 1.3 V or greater. Because the triangle wave amplitude is a function of frequency and thesource impedance of RT is relatively high (1250 Ω), choosing R
DT
for a specific maximum duty cycle (D) isaccomplished using the following equation and the voltage limits for the frequency in question as found inFigure 11 (V
osc
max and V
osc
min are the maximum and minimum oscillator levels):
Where
R
DT
and R
t
are in Ω, D is in decimal
Copyright © 2005 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): TL5001A-Q1
VDT [IDTRDTǒ1*e*t
RDTCDTǓ
(2)
TL5001/A
DTC
CDT RDT
6
UNDERVOLTAGE-LOCKOUT (UVLO) PROTECTION
SHORT-CIRCUIT PROTECTION (SCP)
Q1
12 kΩ
185 kΩ
RSCP
Q2
SCP
Comparator 2
Vref = 1 V
SCP
Comparator 1
1.5 V
From Error
Amp
CSCP
To Output
Drive Logic
SCP
5
2.5 V
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ..............................................................................................................................................
www.ti.com
Soft start can be implemented by paralleling the DTC resistor with a capacitor (C
DT
) as shown in Figure 2 . Duringsoft start, the voltage at DTC is derived by the following equation:
Figure 2. Soft-Start Circuit
If the dc-to-dc converter must be in regulation within a specified period of time, the time constant (R
DT
C
DT
) shouldbe t
0
/3 to t
0
/5. The TL5001A remains off until V
DT
≈0.7 V, the minimum ramp value. C
DT
is discharged every timeUVLO or SCP becomes active.
The undervoltage-lockout circuit turns the output transistor off and resets the SCP latch whenever the supplyvoltage drops too low (approximately 3 V at 25 ° C) for proper operation. A hysteresis voltage of 200 mVeliminates false triggering on noise and chattering.
The TL5001A includes short-circuit protection (see Figure 3 ), which turns the power switch off to prevent damagewhen the converter output is shorted. When activated, the SCP prevents the switch from being turned on untilthe internal latching circuit is reset. The circuit is reset by reducing the input voltage until UVLO becomes activeor until the SCP terminal is pulled to ground externally.
When a short circuit occurs, the error-amplifier output at COMP rises to increase the power-switch duty cycle inan attempt to maintain the output voltage. SCP comparator 1 starts an RC timing circuit when COMP exceeds1.5 V. If the short is removed and the error-amplifier output drops below 1.5 V before time out, normal converteroperation continues. If the fault is still present at the end of the time-out period, the timer sets the latching circuitand turns off the TL5001/A output transistor.
Figure 3. SCP Circuit
4Submit Documentation Feedback Copyright © 2005 – 2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
OUTPUT TRANSISTOR
TL5001A-Q1
www.ti.com
.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
The timer operates by charging an external capacitor (C
SCP
) connected between the SCP terminal and ground,towards 2.5 V through a 185-k Ωresistor (R
SCP
). The circuit begins charging from an initial voltage ofapproximately 185 mV and times out when the capacitor voltage reaches 1 V. The output of SCP comparator 2then goes high, turns on Q2, and latches the timer circuit. The expression for setting the SCP time period isderived from Equation 3 :V
SCP
= (2.5 – 0.185) (1 – e
–t/τ
) + 0.185 (3)
Where
τ= R
SCP
C
SCP
The end of the time-out period (t
SCP
) occurs when V
SCP
= 1 V. Solving for C
SCP
yields Equation 4 :C
SCP
= 12.46 × t
SCP
(4)
Where
t is in seconds, C is in µF
t
SCP
must be much longer (generally 10 to 15 times) than the converter start-up period, or the converter will notstart.
The output of the TL5001A is an open-collector transistor with a maximum collector current rating of 21 mA and avoltage rating of 51 V. The output is turned on under the following conditions: the oscillator triangle wave is lowerthan both the DTC voltage and the error-amplifier output voltage, the UVLO circuit is inactive, and theshort-circuit protection circuit is inactive.
Copyright © 2005 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): TL5001A-Q1
ABSOLUTE MAXIMUM RATINGS
DISSIPATION RATINGS
RECOMMENDED OPERATING CONDITIONS
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ..............................................................................................................................................
www.ti.com
over operating free-air temperature range (unless otherwise noted)
(1)
V
CC
Supply voltage
(2)
41 VV
I(FB)
Amplifier input voltage 20 VV
O
Output voltage, OUT 51 VI
O
Output current, OUT 21 mAI
O(peak)
Output peak current, OUT 100 mAContinuous total power dissipation See Dissipation RatingT
A
Operating ambient temperature range, TL5001AQDRQ1 – 40 ° C to 125 ° CT
stg
Storage temperature range – 65 ° C to 150 ° CLead temperature 1,6 mm (1/16 inch) from case for 10 seconds 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.
PACKAGE T
A
≤25 ° C DERATING FACTOR T
A
= 70 ° C T
A
= 85 ° C T
A
= 125 ° CPOWER RATING ABOVE T
A
= 25 ° C POWER RATING POWER RATING POWER RATING
D 725 mW 5.8 mW/ ° C 464 mW 377 mW 145 mW
MIN MAX UNIT
V
CC
Supply voltage 3.6 40 VV
I(FB)
Amplifier input voltage 0 1.5 VV
O
Output voltage, OUT 50 VI
O
Output current, OUT 20 mACOMP source current 45 µACOMP dc load resistance 100 k Ω
R
t
Oscillator timing resistor 15 250 k Ω
f
OSC
Oscillator frequency 20 500 kHzT
A
Operating ambient temperature TL5001AQDRQ1 – 40 125 ° C
6Submit Documentation Feedback Copyright © 2005 – 2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
ELECTRICAL CHARACTERISTICS
TL5001A-Q1
www.ti.com
.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
over recommended operating free-air temperature range, V
CC
= 6 V, f
osc
= 100 kHz (unless otherwise noted)
TL5001AQPARAMETER TEST CONDITIONS UNITMIN TYP
(1)
MAX
REFERENCE
T
A
= 25 ° C 0.97 1 1.03Output voltage COMP connected to FB VT
A
= MIN to MAX 0.94 0.98 1.06Input regulation T
A
= MIN to MAX, VCC = 3.6 V to 40 V 2 12.5 mVOutput voltage change with temperature T
A
= MIN to MAX – 6%
(2)
2% 6%
(2)
UNDERVOLTAGE LOCKOUT
T
A
= MIN, 25 ° C 3Upper threshold voltage VT
A
= MAX 2.55T
A
= MIN, 25 ° C 2.8Lower threshold voltage VT
A
= MAX 2.0Hysteresis T
A
= MIN to MAX 80 200 mVT
A
= MIN, 25 ° C 2.1 2.55Reset threshold voltage VT
A
= MAX 0.35 0.63
SHORT-CIRCUIT PROTECTION
T
A
= MIN, 25 ° C 0.97 1 1.03SCP threshold voltage VT
A
= MAX 0.94 0.98 1.06SCP voltage, latched T
A
= MIN to MAX No pullup 140 185 230 mVSCP voltage, UVLO standby T
A
= MIN to MAX No pullup 60 120 mVEquivalent timing resistance T
A
= MIN to MAX 185 k Ω
SCP comparator 1 threshold voltage T
A
= MIN to MAX 1.5 V
OSCILLATOR
Frequency T
A
= MIN to MAX R
t
= 100 k Ω100 kHzStandard deviation of frequency T
A
= MIN to MAX 2 kHzFrequency change with voltage T
A
= MIN to MAX V
CC
= 3.6 V to 40 V 1 kHzQ suffix – 9
(2)
5 9
(2)Frequency change with temperature T
A
= MIN to MAX kHzM suffix – 9
(2)
5 9
(2)
Voltage at RT T
A
= MIN to MAX 1 V
DEAD-TIME CONTROL
T
A
= MIN to MAX V
(DT)
= 1.5 V 0.9 × 1.1 ×Output (source) current µAI
RT
(3)
I
RT
(3)
Duty cycle 0% 0.5 0.7T
A
= 25 ° C
Duty cycle 100% 1.3 1.5Input threshold voltage VDuty cycle 0% 0.4 0.7T
A
= MIN to MAX
Duty cycle 100% 1.3 1.7
(1) All typical values are at T
A
= 25 ° C.(2) Not production tested.(3) Output source current at RT
Copyright © 2005 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Link(s): TL5001A-Q1
ELECTRICAL CHARACTERISTICS
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ..............................................................................................................................................
www.ti.com
over recommended operating free-air temperature range, V
CC
= 6 V, f
osc
= 100 kHz (unless otherwise noted)
TL5001AQPARAMETER TEST CONDITIONS UNITMIN TYP
(1)
MAX
ERROR AMPLIFIER
Input bias current T
A
= MIN to MAX – 160 – 500 nAPositive 1.5 2.3 VOutput voltage swing T
A
= MIN to MAXNegative 0.3 0.4 VOpen-loop voltage amplification T
A
= MIN to MAX 80 dBUnity gain bandwidth T
A
= MIN to MAX 1.5 MHzOutput (sink) current T
A
= MIN to MAX V
I(FB)
= 1.2 V, COMP = 1 V 100 600 µAT
A
= MIN, 25 ° C – 45 – 70Output (source) current V
I(FB)
= 0 V, COMP = 1 V µAT
A
= MAX – 30 – 45
OUTPUT
Output saturation voltage T
A
= MIN to MAX I
O
= 10 mA 1.5 2 VT
A
= MIN to MAX V
O
= 50 V, V
CC
= 0 10Off-state current µAV
O
= 50 V 10Short-circuit output current T
A
= MIN to MAX V
O
= 6 V 40 mA
TOTAL DEVICE
Standby supply current Off state T
A
= MIN to MAX 1 1.5 mAAverage supply current T
A
= MIN to MAX R
L
= 100 k Ω1.4 2.1 mA
(1) All typical values are at T
A
= 25 ° C.
8Submit Documentation Feedback Copyright © 2005 – 2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
PARAMETER MEASUREMENT INFORMATION
TL5001A-Q1
www.ti.com
.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
A. The waveforms show timing characteristics for an intermittent short circuit and a longer short circuit that is sufficient toactivate SCP.
Figure 4. PWM Timing Diagram
Copyright © 2005 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Link(s): TL5001A-Q1
TYPICAL CHARACTERISTICS
100 k
10 k
1 M
10 k 100 k 1 M
f
VCC = 6 V
DT Resistance = Rt
TA = 25°C
Rt − T iming Resistance − Ω
− Oscillator Frequency − Hz
osc
94
92
90
88
− 50 − 25 0
96
98
100
25 50 75 100
TA − Ambient Temperature − °C
f − Oscillation Frequency − kHz
osc
VCC = 6 V
Rt = 100 kΩ
DT Resistance = 100 kΩ
− Reference Output Voltage − VVref
VCC − Power-Supply V oltage − V
1
0.8
0.4
0.2
0
1.8
0.6
0 1 2 3 4 5 6
1.4
1.2
1.6
2
7 8 9 10
TA = 25°C
FB and COMP
Connected Together
− Reference Output Voltage Fluctuation − %
TA − Ambient Temperature − °C
∆Vref
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
− 0.2
− 0.4
− 0.8
− 50 − 25 0
0.2
0.4
0.6
25 50 75 100
0
VCC = 6 V
FB and COMP
Connected Together
− 0.6
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ..............................................................................................................................................
www.ti.com
OSCILLATOR FREQUENCY OSCILLATION FREQUENCYvs vsTIMING RESISTANCE AMBIENT TEMPERATURE
Figure 5. Figure 6.
REFERENCE OUTPUT VOLTAGE REFERENCE OUTPUT VOLTAGE FLUCTUATIONvs vsPOWER-SUPPLY VOLTAGE AMBIENT TEMPERATURE
Figure 7. Figure 8.
10 Submit Documentation Feedback Copyright © 2005 – 2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
1
0.9
0.8
0
− 50 − 25 0
− Average Supply Current − mA
1.1
1.2
1.3
25 50 75 100
TA − Ambient Temperature − °C
VCC = 6 V
Rt = 100 kΩ
DT Resistance = 100 kΩ
ICC
1
0.5
0
2
1.5
0 10 20 30 40
− Average Supply Current − mA
VCC − Power-Supply V oltage − V
Rt = 100 kΩ
TA = 25 °C
ICC
1.5
1.2
0.6
0.3
0
1.8
0.9
10 k 100 k 1 M 10 M
PWM Triangle Wave Amplitude Voltage − V
fosc − Oscillator Frequency − Hz
Voscmin (zero duty cycle)
VCC = 6 V
TA = 25 °C
Voscmax (100% duty cycle)
− Error Amplifier Output Voltage − V
VO
IO − Output (Sink) Current − mA
1.5
1
0.5
00 0.2 0.4
2
2.5
3
0.6
VCC = 6 V
VI(FB) = 1.2 V
TA = 25 °C
TL5001A-Q1
www.ti.com
.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
TYPICAL CHARACTERISTICS (continued)
AVERAGE SUPPLY CURRENT AVERAGE SUPPLY CURRENTvs vsPOWER-SUPPLY VOLTAGE AMBIENT TEMPERATURE
Figure 9. Figure 10.
PWM TRIANGLE WAVE AMPLITUDE VOLTAGE ERROR AMPLIFIER OUTPUT VOLTAGEvs vsOSCILLATOR FREQUENCY OUTPUT (SINK) CURRENT
Figure 11. Figure 12.
Copyright © 2005 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Link(s): TL5001A-Q1
1.5
1
0.5
00 20 40
− Error Amplifier Output Voltage − V
2
2.5
3
60 80 100 120
VO
IO − Output (Source) Current − µA
VCC = 6 V
VI(FB) = 0.8 V
TA = 25 °C
2.43
2.42
2.41
2.40
− 50 − 25 0
− Error Amplifier Output Voltage − V
2.44
2.45
2.46
25 50 75 100
VO
TA − Ambient Temperature − °C
VCC = 6 V
VI(FB) = 0.8 V
No Load
180
160
140
120
− 50 − 25 0
− Error Amplifier Output Voltage − mV
200
220
240
25 50 75 100
VO
TA − Ambient Temperature − °C
VCC = 6 V
VI(FB) = 1.2 V
No Load
30
20
0
− 10
− 20
40
10
10 k 100 k 1 M 10 M
− Error Amplifier Open-Loop Gain − dB
f − Frequency − Hz
VCC = 6 V
TA = 25 °C
AV
Error Amplifier Open-Loop Phase Shift
φ
AV
−180°
−210°
−240°
−270°
−300°
−330°
−360°
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ..............................................................................................................................................
www.ti.com
TYPICAL CHARACTERISTICS (continued)
ERROR AMPLIFIER OUTPUT VOLTAGE ERROR AMPLIFIER OUTPUT VOLTAGEvs vsOUTPUT (SOURCE) CURRENT AMBIENT TEMPERATURE
Figure 13. Figure 14.
ERROR AMPLIFIER OPEN-LOOP GAINERROR AMPLIFIER OUTPUT VOLTAGE AND PHASE SHIFTvs vsAMBIENT TEMPERATURE FREQUENCY
Figure 15. Figure 16.
12 Submit Documentation Feedback Copyright © 2005 – 2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
60
40
20
00 0.5 1
80
100
120
1.5 2
DTC Voltage − V
Output Duty Cycle − %
VCC = 6 V
Rt = 100 kΩ
TA = 25 °C
6
4
2
00 20 40
− SCP Time-Out Period − ms
8
10
12
60 80 100 120
VCC = 6 V
Rt = 100 kΩ
DT Resistance = 200 kΩ
TA = 25 °C
CSCP − SCP Capacitance − nF
tSCP
− 30
− 20
− 10
00− 10 − 20
− DTC Output Current −
− 40
− 50
− 60
− 30 − 40 − 50 − 60
DT Voltage = 1.3 V
TA = 25 °C
IO − RT Output Current − µA
AµIO(DT)
1
0.5
0
2
1.5
0 5 10 15 20
− Output Saturation Voltage − V
IO − Output (Sink) Current − mA
VCE
VCC = 6 V
TA = 25 °C
TL5001A-Q1
www.ti.com
.............................................................................................................................................. SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009
TYPICAL CHARACTERISTICS (continued)
OUTPUT DUTY CYCLE SCP TIME-OUT PERIODvs vsDTC VOLTAGE SCP CAPACITANCE
Figure 17. Figure 18.
DTC OUTPUT CURRENT OUTPUT SATURATION VOLTAGEvs vsRT OUTPUT CURRENT OUTPUT (SINK) CURRENT
Figure 19. Figure 20.
Copyright © 2005 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): TL5001A-Q1
APPLICATION INFORMATION
U1
TL5001A
FB
COMP
VO
DTC
RT
GND
C1
100 µF
10 V
VI
5 V +R1
470 Ω
SCP
VCC
L1
20 µH
C2
100 µF
10 V
3.3 V
GND
+
CR1
MBRS140T3
Q1
TPS1101
C6
0.012 µF
R4
5.1 kΩ
R5
7.50 kΩ
1%
R2
56 kΩ
R3
43 kΩ
R6
3.24 kΩ
1%
C5
0.1 µF
C4
1 µF
C3
0.1 µF
GND
8
7
6
5
2
1
3
4
Partial Bill of Materials:
U1 TL5001A Texas Instruments
Q1 TPS1101 Texas Instruments
LI CTX20-1 or Coiltronics
23 turns of #28 wire on
Micrometals No. T50-26B core
C1 TPSD107M010R0100 AVX
C2 TPSD107M010R0100 AVX
CR1 MBRS140T3 Motorola
R7
2.0 kΩ
C7
0.0047 µF
+
TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 ..............................................................................................................................................
www.ti.com
A. Frequency = 200 kHzB. Duty cycle = 90% maxC. Soft-start time constant (TC) = 5.6 msD. SCP TC = 70 ms
Figure 21. Step Down Converter
14 Submit Documentation Feedback Copyright © 2005 – 2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1
PACKAGING INFORMATION
Orderable Device Status (1) Package
Type Package
Drawing Pins Package
Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
TL5001AQDRG4Q1 ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TL5001AQDRQ1 ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br) CU NIPDAU Level-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 TL5001A-Q1 :
•Catalog: TL5001A
•Military: TL5001AM
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
•Military - QML certified for Military and Defense Applications
PACKAGE OPTION ADDENDUM
www.ti.com 26-Mar-2010
Addendum-Page 1
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not
responsible or liable for any such statements.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products Applications
Audio www.ti.com/audio Communications and Telecom www.ti.com/communications
Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers
Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps
DLP® Products www.dlp.com Energy and Lighting www.ti.com/energy
DSP dsp.ti.com Industrial www.ti.com/industrial
Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical
Interface interface.ti.com Security www.ti.com/security
Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense
Power Mgmt power.ti.com Transportation and www.ti.com/automotive
Automotive
Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video
RFID www.ti-rfid.com Wireless www.ti.com/wireless-apps
RF/IF and ZigBee® Solutions www.ti.com/lprfTI E2E Community Home Page e2e.ti.com
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2011, Texas Instruments Incorporated