TPS22912 Datasheet, PDF (1/20 Pages) Texas Instruments – Ultra-Small, Low on Resistance Load Switch with Controlled Turn-on

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TPS22912
SLVSB78 – APRIL 2012
Ultra-Small, Low on Resistance Load Switch with Controlled Turn-on
Check for Samples: TPS22912
FEATURES
1
• 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
– r_ON = 60-mΩ at VIN = 5-V
– r_ON = 61-mΩ at VIN = 3.3-V
– r_ON = 74-mΩ at VIN = 1.8-V
– r_ON = 84-mΩ at VIN = 1.5-V
• 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
• Point of Sales Terminals
• GPS Navigation Devices
• Digital Cameras
• Portable Instrumentation
• Smartphones / Wireless Handsets
DESCRIPTION
The TPS22912 is a small, low r_ON 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.
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).
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 (V_OUT) is higher than the input (V_IN).
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.
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.
TYPICAL APPLICATION
Power
Supply
CIN
VIN
ON _ON
OFF
VOUT
TPS22912
GND
CL
RL
GND
Table 1. Feature List
DEVICE
TPS22912A ⁽²⁾
TPS22912B ⁽²⁾
TPS22912C
TPS22912D ⁽²⁾
r_ON (typ) at 3.3 V
61 mΩ
61 mΩ
61 mΩ
61 mΩ
RISE TIME at 3.3V
(typ)
1 µs
100 µs
1000 µs
4500 µs
QUICK OUTPUT
DISCHARGE ⁽¹⁾
No
No
No
No
MAXIMUM OUTPUT
CURRENT
2-A
2-A
2-A
2-A
ENABLE
Active High
Active High
Active High
Active High
(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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated