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TPS22912A

更新时间： 2024-11-11 11:44:23
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德州仪器 - TI 开关
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20页 743K
描述
Ultra-Small, Low on Resistance Load Switch with Controlled Turn-on

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TPS22912A 数据手册

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TPS22912  
www.ti.com  
SLVSB78 –APRIL 2012  
Ultra-Small, Low on Resistance Load Switch with Controlled Turn-on  
Check for Samples: TPS22912  
1
FEATURES  
DESCRIPTION  
The TPS22912 is a small, low rON load switch with  
controlled turn-on and contains a P-channel MOSFET  
that can operate over an input voltage range of 1.4 V  
to 5.5 V. The switch is controlled by a high input  
(ON), which is capable of interfacing directly with low-  
voltage control signals.  
•
•
Integrated Single Load Switch  
Ultra Small CSP-4 Package 0.9mm × 0.9mm,  
0.5mm Pitch  
•
•
Input Voltage Range: 1.4-V to 5.5-V  
Low ON-Resistance  
The slew rate of the device is internally controlled in  
order to avoid inrush current. The TPS22912 family  
has various rise time options and is active high  
enable. (see Table 1).  
–
–
–
–
rON = 60-mΩ at VIN = 5-V  
rON = 61-mΩ at VIN = 3.3-V  
rON = 74-mΩ at VIN = 1.8-V  
rON = 84-mΩ at VIN = 1.5-V  
The TPS22912 provides circuit breaker functionality  
by latching off the power switch during reverse  
voltage situations. An internal reverse voltage  
comparator disables the power switch when the  
output voltage (VOUT) is higher than the input (VIN).  
This process quickly (10µs typical) stops the flow of  
current towards the input side of the switch. Reverse  
current protection is always active, even when the  
device is disabled. Additionally, under-voltage lockout  
(UVLO) protection turns the switch off if the input  
voltage is too low.  
•
•
•
•
•
2-A Maximum Continuous Switch Current  
Low Threshold Control Input  
Controlled Slew-rate Options  
Under-Voltage Lock Out  
Reverse Current Protection  
APPLICATIONS  
•
•
•
•
•
•
•
Portable Industrial / Medical Equipment  
Portable Media Players  
The TPS22912 is available in a ultra-small, space-  
saving 4-pin CSP package and is characterized for  
operation over the free-air temperature range of  
–40°C to 85°C.  
Point of Sales Terminals  
GPS Navigation Devices  
Digital Cameras  
Portable Instrumentation  
Smartphones / Wireless Handsets  
TYPICAL APPLICATION  
VIN  
VOUT  
Power  
Supply  
ON  
CIN  
ON  
CL  
RL  
OFF  
GND  
TPS22912  
GND  
Table 1. Feature List  
RISE TIME at 3.3V  
QUICK OUTPUT  
DISCHARGE(1)  
MAXIMUM OUTPUT  
CURRENT  
DEVICE  
rON (typ) at 3.3 V  
ENABLE  
(typ)  
TPS22912A(2)  
TPS22912B(2)  
TPS22912C  
61 mΩ  
61 mΩ  
61 mΩ  
61 mΩ  
1 µs  
No  
No  
No  
No  
2-A  
2-A  
2-A  
2-A  
Active High  
Active High  
Active High  
Active High  
100 µs  
1000 µs  
4500 µs  
TPS22912D(2)  
(1) This feature discharges the output of the switch to ground through a 150-Ω resistor, preventing the output from floating.  
(2) Contact local sales/distributor or factory for availability.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2012, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
 
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