MAX15029 Datasheet, PDF (7/10 Pages) Maxim Integrated Products – 1.425V to 3.6V Input, 500mA Low-Dropout Regulators with BIAS Input

1.425V to 3.6V Input, 500mA Low-Dropout
Regulators with BIAS Input
Functional Diagram
IN
MAX15030
ONLY
BIAS
INTERNAL
SUPPLY
GENERATOR
REF
BIAS
UVLO
EN
MAX15029
ONLY
REF
IN
UVLO
MAX15029
MAX15030
CONTROL
LOGIC
OVERTEMPERATURE
PROTECTION
ERROR
AMPLIFIER
WITH
SOFT-START
GND
MOS DRIVER
WITH I_LIMIT
P
OUT
SS
FB
Detailed Description
The MAX15029/MAX15030 low-dropout linear regula-
tors operate from input voltages as low as 1.425V and
deliver up to 500mA of continuous output current with a
maximum dropout voltage of only 150mV.
The MAX15030 operates with an input voltage as low
as 1.425V if the bias voltage (V_BIAS) of 3V to 5.5V is
available. The power is applied at IN while the control
is provided through BIAS input. The current drawn by
BIAS is negligible when the LDO goes into the shut-
down. This feature is especially useful in automotive
applications where the BIAS input is derived from an
always-on LDO that expects to provide minimal power
during the key-off condition.
The pMOS output stage can be driven from input volt-
ages down to +1.425V without sacrificing stability or
transient performance. The output voltage of all the
regulators is adjustable from 0.5V to V_IN and is ±2%
accurate over load and line variations, from -40°C to
+125°C. Since these regulators have a pMOS output
device, supply current is not a significant function of
load or input headroom.
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