TPS22929D Datasheet, PDF (1/21 Pages) Texas Instruments – Ultra-Small, Low on Resistance Load Switch with Controlled Turn-on

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TPS22929
SLVSB39 – DECEMBER 2011
Ultra-Small, Low on Resistance Load Switch with Controlled Turn-on
Check for Samples: TPS22929
FEATURES
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• Integrated Single Load Switch
• Small SOT23-6 package
• Input Voltage Range: 1.4-V to 5.5-V
• Low ON-Resistance
– r_ON = 115-mΩ at VIN = 5-V
– r_ON = 115-mΩ at VIN = 3.3-V
– r_ON = 118-mΩ at VIN = 2.5-V
– r_ON = 129-mΩ at VIN = 1.5-V
• 1.8-A Continuous Switch Current (25C)
• Low Threshold Control Input
• Controlled Slew-rate Options
• Under-Voltage Lock Out
• Quick Output Discharge Transistor
• Reverse Current Protection
APPLICATIONS
• Portable Industrial Equipment
• Portable Medical Equipment
• Portable Media Players
• Point Of Sales Terminal
• GPS Devices
• Digital Cameras
• Portable Instrumentation
• Smartphones
DESCRIPTION
The TPS22929 is a small, low r_ON load switch with
controlled turn on. The device 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 an
on/off input (ON), which is capable of interfacing
directly with low-voltage control signals. The
TPS22929 is active high enable.
The TPS22929 contains a 150-Ω on-chip load
resistor for quick output discharge when the switch is
turned off. The rise time of the device is internally
controlled in order to avoid inrush current. The
TPS22929 family has various slew rate options
(see ).
The TPS22929 device 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 driven higher than the input
(V_IN) to quickly (10µs typ) stop the flow of current
towards the input side of the switch. Reverse current
is always active, even when the power-switch is
disabled. Additionally, under-voltage lockout (UVLO)
protection turns the switch off if the input voltage is
too low.
The TPS22929 is available in an small, space-saving
6-pin SOT23-6 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
TPS22929
GND
CL
RL
GND
Table 1. Feature List
DEVICE
TPS22929A ⁽³⁾
TPS22929B ⁽³⁾
TPS22929C ⁽³⁾
TPS22929D
rON (typ) at 3.3
V
115-mΩ
115-mΩ
115-mΩ
115-mΩ
Rise Time at 3.3 V
(typ)
0.5 µs
100 µs
1000 µs
4500 µs
QUICK OUTPUT
DISCHARGE ⁽¹⁾
Yes
Yes
Yes
Yes
MAXIMUM OUTPUT
CURRENT
(3.3 V and 25°C)⁽²⁾
1.8-A
1.8-A
1.8-A
1.8-A
ENABLE
Active High
Active High
Active High
Active High
(1) This feature discharges the output of the switch to ground through an 150-Ω resistor, preventing the output from floating.
(2) See “Thermal Considerations” section in Application Information to calculate maximum continuous current for a specific application.
(3) Contact local sales/distributor or factory for availability.
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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 © 2011, Texas Instruments Incorporated