XR71211 Datasheet, PDF (1/12 Pages) Exar Corporation – 1.5A Ultra Low Dropout Voltage Regulator

XR71211
1.5A Ultra Low Dropout Voltage Regulator
General Description
The XR71211 is an ultra low dropout voltage regulator capable of deliver-
ing an output of 1.5Amps. It differentiates from its competitors by being
able to operate from a single supply rail of 1.4V to 2.625V without the need
for a noise generating charge pump or secondary bias rail.
This LDO provides a guaranteed dropout voltage of 250mV at maximum
junction temperature and is ideal for 1.5V to 1.2V and 1.8V to 1.5V conver-
sions. The output voltage can be set as low as 0.6V with +/-0.5% accu-
racy making the XR71211 perfectly suited for powering low voltage
devices such as FPGAs, DSPs, ASICs and other SOCs.
An enable function, soft start and Power Good flag complete the feature
set. Built-in current limit, reverse bias and thermal protection ensures safe
operation under abnormal operating conditions.
The XR71211 is offered in RoHS compliant, “green”/halogen free 10-pin
3x3mm DFN package.
FEATURES
 1.5A Output Current
 1.4V to 2.625V Single Input Voltage
 Adjustable Output Voltage ≥0.6V
 ±0.5% Output Voltage Accuracy
 Ultra Low Dropout Voltage
 250mV Max over temp @ 1.5A
 Power Good Flag
 Enable and Soft Start
 Current Limit and Thermal Protection
 Reverse Bias Protection
 RoHS compliant “Green”/Halogen Free
 10-pin 3mm x 3mm DFN
APPLICATIONS
 Point of Load Conversion
 Microprocessor, DSP and FPGA Supplies
 Networking and Telecom Equipment
 Switching Supplies Post Regulation
Ordering Information – back page
Typical Application
VIN 1.4V - 2.625V
R4
CIN
PGOOD
R3
Enable
C1
VIN
VOUT
XR71211
EN _DFN-10
ADJ
PGOOD
GND
VOUT>0.6V
R1
COUT
R2
VOUT, 50mV/Div, AC coupled
24mV overshoot
-20mV undershoot
0.5A-1.5A
IOUT, 1A/Div
40µs/Div
Transient Response
© 2014 Exar Corporation
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exar.com/XR71211
Rev 1B