MAX15029 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 1.425V to 3.6V Input, 500mA Low-Dropout Regulators with BIAS Input

19-4586; Rev 0; 4/09
1.425V to 3.6V Input, 500mA Low-Dropout
Regulators with BIAS Input
General 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
typical dropout voltage of only 40mV. The output volt-
age is adjustable from 0.5V to V_IN and is ±2% accurate
over load and line variations, from -40°C to +125°C.
The MAX15030 features a BIAS input of 3V to 5.5V from
an always-on power supply. The BIAS input current is
reduced down to less than 2µA during the shutdown.
These regulators use small, 1µF ceramic input capaci-
tors and 2.2µF ceramic output capacitors to deliver
500mA output current. High bandwidth provides excel-
lent transient response and limits the output voltage devi-
ation to 10mV for a 100mA to 500mA load step, with only
a 2.2µF ceramic output capacitor, and the voltage devia-
tions can be reduced further by increasing the output
capacitor.
These devices offer a logic-controlled shutdown input
to reduce input current (I_IN) consumption down to less
than 5.5µA in standby mode. Other features include a
soft-start to reduce inrush current, short-circuit protec-
tion, and thermal-overload protection.
The MAX15030 features a BIAS input allowing a sec-
ondary supply to keep the LDO’s internal circuitry alive
if the voltage on IN goes to 0. Both devices are fully
specified from -40°C to +125°C and are available in a
10-pin thermally enhanced TDFN package (3mm x
3mm) that includes an exposed pad for optimal power
dissipation. For a 1A version of these LDOs, refer to the
MAX15027/MAX15028 data sheet.
Applications
Automotive (Dead-Man LDO)
Servers
Storage
Networking
Base Stations
Optical Modules
ATE
Features
o 1.425V to 3.6V Input Voltage Range
o Output Voltage Programmable from 0.5V to V_IN
o Guaranteed Maximum 150mV Dropout at 500mA
Output Current
o 2% Output Accuracy Over Load, Line, and
Temperature
o Stable with Ceramic Capacitors
o Fast Transient Response
o 60µA Operating Bias Supply Current
o 1.2µA Shutdown Bias Supply Current
o Short-Circuit and Thermal Protection
o -40°C to +125°C Operating Temperature Range
o Soft-Start Limits Inrush Current
o Thermally Enhanced 3mm x 3mm TDFN Package
Ordering Information
PART
TEMP RANGE
PIN-
TOP
PACKAGE MARK
MAX15029ATB+ -40°C to +125°C 10 TDFN-EP* +AUF
MAX15030ATB+ -40°C to +125°C 10 TDFN-EP* +AUG
+Denotes a lead(Pb)-free/RoHS-compliant package.
For tape-and-reel orders, add a “T” after the “+.”
*EP = Exposed pad.
TOP VIEW
Pin Configurations
IN 1 +
IN 2
IN 3
I.C. 4
EN 5
MAX15029
10 OUT
9 OUT
8 GND
7 FB
6 SS
Typical Operating Circuits appear at end of data sheet.
TDFN
(3mm x 3mm)
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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