AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 1 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
• Dual USB port power switches
• Over-current and thermal protection
• 0.8A accurate current limiting
• Reverse Current Blocking
• 90m on-resistance
• Input voltage range: 2.7V – 5.5V
• 0.6ms typical rise time
• Very low shutdown current: 1uA (max)
• Fault report (FLG) with blanking time (7ms typ)
• ESD protection: 6KV HBM, 300V MM
• Active low (AP2146) or active high (AP2156) enable
• Ambient temperature range -40ºC to 85°C
• SOP-8 L and MSOP-8L- EP (E xposed Pad): Available in
“Green” Molding Compound (No Br, Sb)
• Lead Free Finish / RoHS Compliant (Note 1)
• UL Recognized, File Number E322375
• IEC60950-1 CB Scheme Certified
The AP2146 and AP2156 are integrated high-side power switches
optimized for Universal Serial Bus (USB) and other hot-swap
applications. The family of devices complies with USB 2.0 and
available with both polarities of Enable input. They offer current
and thermal limiting and short circuit protection as well as
controlled rise time and under-voltage lockout functionality. A 7ms
deglitch capability on the open-drain Flag output prevents false
over-current reporting and does not require any external
components.
All devices are available in SOP-8L and MSOP-8L-EP packages.
• Consumer electronics – LCD TV & Monitor, Game Machines
• Communications – Set-Top-Box, GPS, Smartphone
• Computing – Laptop, Desktop, Servers, Printers, Docking Station, HUB
0.1uF
IN
GND
EN2
OUT1
ON
68uF
Power Supply
2.7V to 5.5V 0.1uF
OFF
FLG1
Load
10k
10k
FLG2
EN1
OUT2
68uF
0.1uF
Load
10uF
Available Options
Part N um be r Channel Enable Pin (EN) Current Limit
(Typical) Recommended Maximum
Continuous Load Current
AP2146 2 Active Low 0.8A 0.5A
AP2156 2 Active High 0.8A 0.5A
Features Description
Applications
Ty pical Application Circuit
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 2 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
AP 21 X 6 XX G - 13
4 : Active Low
5 : Active High
G : Green 13 : Tape & Reel
6 : 2 Channel
Channel Green
PackageEnable Packing
S : SOP-8L
MP : MSOP-8L-EP
Device Package
Code Packaging
(Note 2) 13” Tape and Reel
Quantity Part Number Suffix
AP21X6SG-13 S SOP-8L 2500/Tape & Reel -13
AP21X6MPG-13 MP MSOP-8L-EP 2500/Tape & Reel -13
Notes: 1. EU Directive 2002/ 95/E C (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
2. Pad la yout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
SOP-8L
( Top View )
1
2
3
4
8
7
6
5
OUT1
IN
OUT2
GND
EN1
EN2
FLG2
FLG1
MSOP-8L-EP
1
2
3
4
8
7
6
5
OUT1
IN
OUT2
GND
EN1
EN2
FLG2
FLG1
( Top View )
Ordering Information
Pin Assignment
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 3 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Pin Name Pin Number Descriptions
EN1 1 Switch 1 enable input, active low (AP2146) or active high (AP215 6)
FLG1 2 Switch 1 over-current an d over-temperature fault report, op en-drain
FLG2 3 Switch 2 over-current an d over-temperature fault report, op en-drain
EN2 4 Switch 2 enable input, active low (AP2146) or active high (AP215 6)
OUT2 5 Switch 2 voltage output pin
GND 6 Ground
IN 7 Voltage input pin
OUT1 8 Switch 1 voltage output pin
Functional Block Diagram
Reverse
blocking
Thermal
Sense
Driver
FLG2
OUT2
GND
IN
EN2
UVLO
Current
Limit
CS
Deglitch
Reverse
blocking
Thermal
Sense
Driver
UVLO
Current
Limit
CS
Deglitch
OUT1
FLG1
EN1
GND
Pin Descriptions
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 4 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Absolute Maximum Ratings
Symbol Parameter Ratings Units
ESD HBM Human Body Model ESD Protection 6 KV
ESD MM Machine Model ESD Protection 300 V
VIN Input Voltage 6.5 V
VOUT Output Voltage VIN + 0.3 V
VEN , VFLG Enable Voltage 6.5 V
Iload Maximum Continuous Load Current Internal Limited A
TJmax Maximum Junction Temperature 150 °C
TST Storage Temperature Range (Note 3) -65 ~ 150 °C
Notes: 3. UL Recognized Rating from -30°C to 70°C
Recommended Operating Conditions
Symbol Parameter Min Max Units
VIN Input voltage 2.7 5.5 V
IOUT Output C urrent 0 500 mA
TA Operating Ambient Temperature -40 85 °C
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 5 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Electrical Characteristics
(TA = 25oC, CIN = 10μF, VIN = +5.0V, unless otherwise stated)
Symbol Parameter Test Conditions Min Typ. Max Unit
VUVLO Input UVLO Rload=1k 1.6 1.9 2.5 V
ISHDN Input Shutdown Current Disabled, IOUT= 0 0.5 1 μA
IQ Input Quiescent Current, Dual Enabled, IOUT= 0 95 140 μA
ILEAK Input Leakage Current Disabled, OUT grounded 1 μA
IREV Reverse Leakage Current Disabled, VIN = 0V, VOUT = 5V, IREV at VIN 1 μA
RDS(ON) Switch on-resistance VIN = 5V, IOUT= 0.5A,
-40oC TA85oC MSOP-8L-EP 90 135 m
SOP-8L 100 135 m
VIN = 3.3V, IOUT= 0.5A, -40oC TA85oC 120 160 m
ISHORT Short-circuit current limit Enabled into short circuit, CL=22μF 0.7 A
ILIMIT Over-Load Current Limit VIN = 5V, VOUT = 4.8V, CL=120μF, -40oC
TA85oC 0.6 0.8 1.0 A
ITrig Current limiting trigger
threshold VIN = VEN, Output Current Slew rate
(<100A/s), CL=22
μ
F 1.0 A
TSHORT Short-circuit Response Time VOUT = 0V to IOUT = ILIMIT (short applied to
output), CL = 22μF 20 μs
VIL EN Input Logic Low Voltage VIN = 2.7V to 5.5V 0.8 V
VIH EN Input Logic High Voltage VIN = 2.7V to 5.5V 2 V
ISINK EN Input leakage VEN = 5V 1 μA
TD(ON) Output turn-on delay time CL=1μF, Rload=10 0.05 ms
TR Output turn-on rise time CL=1μF, Rload=10 0.6 1.5 ms
TD(OFF) Output turn-off delay time CL=1
μ
F, Rload=10 0.01 ms
TF Output turn-off fall time CL=1μF, Rload=10 0.05 0.1 ms
RFLG FLG output FET on-resistance IFLG =10mA 20 40
IFOH Error Flag Off Current VFLG=5V 0.01 1
μA
TBlank FLG blanking time CL=22μF 4 7 15 ms
TSHDN Thermal shutdown threshold Enabled, Rload=1k 140 °C
THYS Thermal shutdown hysteresis 25 °C
θJA Thermal Resistance
Junction-to-Ambient SOP-8L (Note 4) 110 oC/W
MSOP-8L-EP (Note 5) 60 oC/W
Notes: 4. Test condition for SOP-8L: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad layout.
5. Test condition for MSOP-8L-EP: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 3
vias to bottom layer ground plane.
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 6 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics
VEN
90%
VOUT
TD(ON)
10%
TD(OFF)
50% 50%
TR
10%
90%
TF
VEN
90%
VOUT
TD(ON)
10%
TD(OFF)
50% 50%
TR
10%
90%
TF
Figure 1. Voltage Waveforms: AP2146 (left), AP2156 (right)
All Enable Plots are for AP2146 Active Low
Channel 1 Turn-On Delay and Rise Time
500us/div
Channel 1 Turn-Off Delay and Fall Time
500us/div
Channel 2 Turn-On Delay and Rise Time
500us/div
Channel 2 Turn-Off Delay and Fall Time
500us/div
Vout 1
2V/div
Ven 1
5V/div
CL=1uF
TA=25°C
RL=10
Vout 1
2V/div
Ven 1
5V/div
CL=1uF
TA=25°C
RL=10
Vout 2
2V/div
Ven 2
5V/div
CL=1uF
TA=25°C
RL=10
Vout 2
2V/div
Ven 2
5V/div
CL=1uF
TA=25°C
RL=10
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 7 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Channel 1 Turn-On Delay and Rise Time
500us/div
Channel 1 Turn-Off Delay and Fall Time
500us/div
Channel 2 Turn-On Delay and Rise Time
500us/div
Channel 2 Turn-Off Delay and Fall Time
500us/div
Channel 1 Short Circuit Current,
Device Enabled Into Short
500us/div
Channel 2 Short Circuit Current,
Device Enabled Into Short
500us/div
Iout 1
200mA/div
Ven 1
5V/div
VIN=5V
TA=25°C
CL=22uF
Iout 2
200mA/div
Ven 2
5V/div
VIN=5V
TA=25°C
CL=22uF
Vout 1
2V/div
Ven 1
5V/div
CL=100uF
TA=25°C
RL=10
Vout 1
2V/div
Ven 1
5V/div
CL=100uF
TA=25°C
RL=10
Vout 2
2V/div
Ven 2
5V/div
CL=100uF
TA=25°C
RL=10
Vout 2
2V/div
Ven 2
5V/div
CL=100uF
TA=25°C
RL=10
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 8 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Channel 1 Inrush Current
1ms/div
Channel 2 Inrush Current
1ms/div
Channel 1
1 Ω Load Connected to Enabled Device
2ms/div
Channel 1
2Ω Load Connected to Enabled Device
2ms/div
Channel 2
1 Ω Load Connected to Enabled Device
2ms/div
Channel 2
2Ω Load Connected to Enabled Device
2ms/div
Iout 1
1A/div
Vflag 1
2V/div
VIN=5V
TA=25°C
CL=22uF
Iout 1
1A/div
Vflag 1
2V/div
VIN=5V
TA=25°C
CL=22uF
Iout 2
1A/div
Vflag 2
2V/div
VIN=5V
TA=25°C
CL=22uF
Iout 2
1A/div
Vflag 2
2V/div
VIN=5V
TA=25°C
CL=22uF
Iout 1
200mA/div
Ven 1
5V/div
VIN=5V
TA=25°C
RL=10
CL=470uF
CL=220uF
CL=100uF
Iout 2
200mA/div
Ve n 2
5V/div
VIN=5V
TA=25°C
RL=10
CL=470uF
CL=220uF
CL=100uF
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 9 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Channel 1
Short Circuit with Blanking Time and Reco very
20ms/div
Channel 2
Short Circuit with Blanking Time and Recovery
20ms/div
Channel 1 Power On
1ms/div
Channel 2 Power On
1ms/div
Channel 1 UVLO Increasing
1ms/div
Channel 1 UVLO Decreasing
10ms/div
Iout
200mA/div
Vin
2V/div Vin
2V/div
Iout
200mA/div
TA=25°C
CL=22uF
RL=10
TA=25°C
CL=22uF
R
L
=
10
Vin
5V/div
Vflag
5V/div
TA=25°C
CL=22uF
RL=10
Iout
200mA/div
Ven
5V/div
Vin
5V/div
Vflag
5V/div
Iout
200mA/div
Ven
5V/div
TA=25°C
CL=22uF
RL=10
Iout
1A/div
Vout
5V/div VIN=5V
TA=25°C
CL=22uF
Vflag
5V/div Vflag
5V/div
Iout
1A/div
Vout
5V/div VIN=5V
TA=25°C
CL=22uF
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 10 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Channel 2 UVLO Increasing
1ms/div
Channel 2 UVLO Decreasing
10ms/div
Channel 1 Enabled and Shorted with Channel 2
Disabled
100ms/div
Channel 1 Disabled and Channel 2 Enabled
50ms/div
Iout
200mA/div
Vin
2V/div Vin
2V/div
Iout
200mA/div
TA=25°C
CL=22uF
RL=10
TA=25°C
CL=22uF
RL=10
Vout 2
5V/div
Iout 2
500mA/div
TA=25°C
CL=22uF
Vo ut 1
5V/div
Vflag 1
5V/div
Vout 1
5V/div
Vout 2
5V/div
TA=25°C
CL=22uF
Ven1
5V/div
Ven2
5V/div
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 11 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Turn- On Ti me vs Input Voltag e
0
100
200
300
400
500
600
700
800
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Input V olta ge (V)
Turn-On Time (us)
Turn- Off Time vs Input Vol tage
28
28
29
29
30
30
31
31
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Input V olta ge (V)
Turn-Off Tim e (us )
Rise Ti m e vs I nput Vol tage
0
100
200
300
400
500
600
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Input V olta ge (V)
Rise Time (us)
Fal l Time vs I nput Vol tage
19
20
21
22
23
24
25
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Input V olta ge (V)
Fall Time (us )
Supply Cur r ent , Output Enabl ed v s Ambie nt Tem perat ur e
30
35
40
45
50
55
60
65
-60 -40 -20 0 20 40 60 80 100
Ambient Temperature (°C)
Supply Current, Output Enabled (uA)
Suppl y Cur r e nt , O utput Di s abled vs A m bient T emper ature
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
-45 -25 -5 15 35 55 75 95
Ambient Temperature (°C)
Supply Current, Output Disabled (uA)
Vin=2.7V
Vin=5.0V
Vin=3.3V
Vin=5.5V
Vin=5.0V Vin=5.5V
Vin=3.3V
Vin=2.7V
CL=1uF
RL=10
T
A
=25°C
CL=1uF
RL=10
T
A
=
°
CL=1uF
RL=10
T
A
=25°C
CL=1uF
RL=10
T
A
=
°
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 12 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics (Continued)
Stati c Drain-Source On-State Resistance vs Ambient
Temperature
100
110
120
130
140
150
160
170
180
190
200
-60 -40 -20 0 20 40 60 80 100
Ambient Temp er atu r e ( °C)
Stati c Drain-Source On-State
Resistance (mΩ)
Shor t-Cir cuit O utput Curr e nt vs A m b i e nt Temperat ure
630
640
650
660
670
680
690
700
710
-60 -40 -20 0 20 40 60 80 100
Ambient Tempera ture (°C)
Short-Circuit Output Current (mA)
Underv olt age Loc kout vs Ambi en t Te m pe r ature
1.95
1.96
1.97
1.98
1.99
2.00
2.01
2.02
2.03
2.04
2.05
-60 -40 -20 0 20 40 60 80 100
Ambient Temperature (°C)
Undervoltage Lockout (V)
Threshol d Tr ip Curre nt vs Input Vol tage
1.10
1.11
1.12
1.13
1.14
1.15
2.83.33.84.34.85.3
Input Voltage (V)
Threshold Trip Current (A)
Current Lim i t Response vs Peak Current
0
5
10
15
20
25
30
35
40
45
2345678910
Peak Current (A)
Current Limit Response (us)
Vin=2.7V Vin=3.3V
Vin=5V
Vin=2.7V Vin=3.3V Vin=5.0V
Vin=5.5V
UVLO Falling
UVLO Rising
VIN=5V
TA=25°C
C
L
=22uF
TA=25°C
CL=22uF
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 13 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Application Note
Power Supply Considerations
A 0.01-F to 0.1-F X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is
recommended. Placing a high-value electrolytic capacitor on the input (10-F minimum) and output pin(s) is
recommended when the output load is heavy. This precaution reduces power-supply transients that may
cause ringing on the input. Additionally, bypassing the output with a 0.01-F to 0.1-F ceramic capacitor
improves the immunity of the device to short-circuit transients.
Over-current and Short Circuit Protection
An internal sensing FET is employed to check for over-current conditions. Unlike current-sense resistors,
sense FETs do not increase the series resistance of the current path. When an overcurrent condition is
detected, the device maintains a constant output current and reduces the output voltage accordingly.
Complete shutdown occurs only if the fault stays long enough to activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output has been shorted to GND
before the device is enabled or before VIN has been applied. The AP2146/AP2156 senses the short circuit
and immediately clamps output current to a certain safe level namely ILIMIT.
In the second condition, an output short or an overload occurs while the device is enabled. At the instance
the overload occurs, higher current may flow for a very short period of time before the current limit function
can react. After the current limit function has tripped (reached the over-current trip threshold), the device
switches into current limiting mode and the current is clamped at ILIMIT.
In the third condition, the load has been gradually increased beyond the recommended operating current.
The current is permitted to rise until the current-limit threshold (ITRIG) is reached or until the thermal limit of
the device is exceeded. The AP2146/AP2156 is capable of delivering current up to the current-limit threshold
without damaging the device. Once the threshold has been reached, the device switches into its current
limiting mode and is set at ILIMIT.
Note that when the output has been shorted to GND at extremely low temperature (< -30oC), a minimum
120-F electrolytic capacitor on the output pin is recommended. A correct capacitor type with capacitor
voltage rating and temperature characteristics must be properly chosen so that capacitance value does not
drop too low at the extremely low temperature operation. A recommended capacitor should have
temperature characteristics of less than 10% variation of capacitance change when operated at extremely
low temp. Our recommended aluminum electrolytic capacitor type is Panasonic FC series.
FLG Response
When an over-current or over-temperature shutdown condition is encountered, the FLG open-drain output
goes active low after a nominal 7-ms deglitch timeout. The FLG output remains low until both over-current
and over-temperature conditions are removed. Connecting a heavy capacitive load to the output of the
device can cause a momentary over-current condition, which does not trigger the FLG due to the 7-ms
deglitch timeout. The AP2146/AP2156 is designed to eliminate false over-curre nt reporting without the need
of external components to remove unwanted pulses.
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 14 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Application Note (Continued)
Power Dissipation and Junction Temperature
The low on-resistance of the internal MOSFET allows the small surface-mount packages to pass large
current. Using the maximum operating ambient temperature (TA) and RDS(ON), the power dissipation can be
calc ulated by:
PD = RDS(ON)× I2
Finally, calculate the junction temperature:
TJ = PD x RθJA + TA
Where:
TA= Ambient temperature °C
RθJA = Thermal resistance
PD = Total power dissipation
Thermal Protection
Thermal pr otection prevent s the IC from damage when heavy-overload or short -circuit faul ts are pres ent for
extended periods of time. The AP2146/AP2156 implements a thermal sensing to monitor the operating
junction temperature of the power distribution switch. Once the di e t em pe rat u r e ri se s to appr o xi ma te ly 14 0° C
due to excessive power dissipation in an over-current or short-circuit condition the internal thermal sense
circuitry turns the power switch off, thus preventing the power switch from damage. Hysteresis is built into
the thermal sense circuit allowing the device to cool down approximately 25°C before the switch turns back
on. The switch continues to cycle in this manner until the load fault or input power is removed. The FLG
open-drain output is asserted when an over-temperature shutdown or over-current occurs with 7-ms deglitch.
Under-voltage Lockout (UVLO)
Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power
supply has reached at least 1.9V, even if the switch is enabled. Whenever the input voltage falls below
approximately 1.9V, the power switch is quickly turned off. This facilitates the design of hot-insertion systems
where it is not possible to turn off the power switch before input power is removed.
Host/Self-Powered HUBs
Hosts and self-powered hubs (SPH) have a local power supply that powers the embedded functions and the
downstream ports (see Figure 2). This power supply must provide from 5.25V to 4.75V to the board side of
the downstream connection under both full-load and no-load conditions. Hosts and SPHs are required to
have current-limit protection and must report over-curre nt conditions to the USB controller. Typical SPHs are
desktop PCs, monitors, printers, and stand-alon e hubs.
3.3V
IN
GND
EN2
Power Supply
USB
Controller FLG2
OUT1 68uF
0.1uF
4
3
78
6
5V
Downstream
USB Ports
D+
D-
VBUS
GND
AP2146
0.1uF
EN1
FLG1
1
2
OUT2 68uF
0.1uF
5
D+
D-
VBUS
GND
Figure 2. Typical Two - Po rt U SB Host / Self-Powered H ub
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 15 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Application Note (Continued)
Generic Hot-Plug Applications
In many applications it may be necessary to remove modules or pc boards while the main unit is still
operating. These are considered hot-plug applications. Such implementations require the control of current
surges seen by the main power supply and the card being inserted. The most effective way to control these
surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in
which a power supply normally turns on. Due to the controlled rise times and fall times of the
AP2146/AP2156, these devices can be used to provide a softer start-up to devices being hot-plugged into a
power ed syst em. The UV LO feat ure of the A P2146/A P2156 al so ensur es that the switc h is off af ter the ca rd
has been removed, and that the switch is off during the next insertion.
By placing the AP2146/AP2156 between the VCC input and the rest of the circuitry, the inp ut power reaches
these devices first after insertion. The typical rise time of the switch is approximately 1ms, providing a slow
voltage ramp at the output of the device. This implementation controls system surge current and provides a
hot-plugging mechanism for any device.
Marking Information
(1) SOP-8L
AP21X X
( Top view )
YY WW X X
Part Number
Logo
WW : Week : 01~52; 52
YY : Year : 08, 09,10~
G : Green
X : Internal Code
8765
1234
4 : Active Low
5 : Active High
6 : 2 Channel
represents 52 and 53 week
(2) MSOP-8L-EP
AP21X X
( Top view )
Y W X E
Part Number
Logo Y : Year : 0~9
A~Z : Green
8765
1234
4 : Active Low
5 : Active High 6 : 2 Channel
A~Z : 27~52 week; Z represents
W : Week : a~z : 1~26 week;
52 and 53 week
MSOP-8L-EP
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 16 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
Package Information (All Dimensions in mm)
(1) Package type: SOP-8L
1.27typ 0.3/0.5
7°~9°
4.85/4.95
3.85/3.95
5.90/6.10
0.15/0.25
7°~9°
0.62/0.82
0.10/0.20
Gauge Plane
0.254
Seating Plane
0.35max. 45°
Detail "A"
Detail "A"
1.30/1.50
1.75max.
Land Pattern Recommendation
(Unit: mm)
6x-1.27
8x-1.55
8x-0.60
5.4
0°/8°
(2) Package type: MSOP-8L-EP
2.9/3.1
0.75/0.95 2.9/3.1
4.7/5.1
0.65Bsc. 0.22/0.38
0.05
0.4/0.8
0.25
0.95Ref.
Gauge plane
0°/8°
"A"
DETAIL "A"
1.35/1.65
1.65/1.95
EXPOSED PAD
(BOTTOM)
8x-0.45
8x-1.4
6x-0.65
EXPOSED PAD
(BOTTOM)
1
1
1
Land Pattern Recommendation
(Unit:mm)
4.4
1.10Max.
0.15Typ.
0.05/0.15
AP2146/AP2156
0.5A DUAL CHANNEL CURRENT-LIMITED POWER
SWITCH
AP2146/AP2156 Rev 2 17 of 17 DECEMBER 2009
www.diodes.com © Diodes Incorporated
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