Rainbow Electronics MAX15030 - Manual

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
♦ 1.425V to 3.6V Input Voltage Range
♦ Output Voltage Programmable from 0.5V to V
IN
♦ Guaranteed Maximum 150mV Dropout at 500mA
Output Current
♦ 2% Output Accuracy Over Load, Line, and
Temperature
♦ Stable with Ceramic Capacitors
♦ Fast Transient Response
♦ 60µA Operating Bias Supply Current
♦ 1.2µA Shutdown Bias Supply Current
♦ Short-Circuit and Thermal Protection
♦ -40°C to +125°C Operating Temperature Range
♦ Soft-Start Limits Inrush Current
♦ Thermally Enhanced 3mm x 3mm TDFN Package
MAX15029/MAX15030
1.425V to 3.6V Input, 500mA Low-Dropout
Regulators with BIAS Input
________________________________________________________________ Maxim Integrated Products 1
1 +
3
4
10
8
7
OUT
GND
FB
IN
IN
I.C.
MAX15029
2 9 OUT IN
5 6 SS EN
TDFN
(3mm x 3mm)
TOP VIEW
Pin Configurations
Ordering Information
19-4586; Rev 0; 4/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations continued at end of data sheet.
PART TEMP RANGE
PIN-
PACKAGE
TOP
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.
Typical Operating Circuits appear at end of data sheet.