TPS7B4255
SBVS441 – DECEMBER 2022
TPS7B4255 70-mA, 40-V, Voltage-Tracking LDO With Voltage-Buffering Capability
1 Features
3 Description
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Wide input operating voltage range (3 V to 40 V):
– Absolute maximum input range: –40 V to +45 V
Wide output voltage range: 2 V to 30 V
Very-tight, output-tracking tolerance: 5 mV (max)
Low dropout voltage: 500 mV (max) at 70 mA
Reverse polarity protection
The TPS7B4255 is a low-dropout (LDO) voltage-
tracking regulator, with high tracking accuracy and
excellent load and line transient response. The device
is available in a 5-pin, SOT-23 (DBV) package. The
TPS7B4255 is designed to supply off-board sensors
in industrial applications such as condition monitoring
sensor systems. The device provides integrated
protection features such as reverse polarity, output
short to supply and ground, current limit, and thermal
shutdown to protect against the high risk of cable
failures in an off-board power system. The device is
designed to survive a 45-V (absolute maximum) input
voltage during extreme transient events.
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Reverse current protection
Combined reference and enable input
Low quiescent current at light loads (100-μA load):
– 50 μA (max)
Wide ESR range:
– Stable with 1-µF to 200-µF ceramic output
capacitor, 1-mΩ to 3-Ω ESR
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Overtemperature protection
Output short-circuit protection to ground and
supply
Junction temperature: –40°C to +150°C, TJ
Available in 5-pin SOT-23 DBV package
Buffers signals up to 1 kHz (see the Signal-
Buffering LDO section)
A reference voltage applied at the ADJ/EN pin is
effectively tracked with high accuracy for loads up to
70 mA. The high tracking accuracy provides accurate
power supply to off-board modules and enables
better accuracy when making measurements using
ratiometric sensors.
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By setting the ADJ/EN input pin low, the TPS7B4255
switches to standby mode and reduces the quiescent
current to the minimum value.
2 Applications
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Condition monitoring sensors
Motion detectors (PIR, uWave, and so forth)
Wired controls
Telemetry and RTUs
Robot sensing modules
Package Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7B4255
DBV (SOT-23, 5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
DC Supply
IN
OUT
IN
DC/DC converter
or LDO
TPS7B4255
ADJ/EN
OUT
5V
Sensor
1
MCU
ADC
Control Unit Board
Typical Application
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.