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LT3021-1.8_15 Datasheet, PDF (1/16 Pages) Linear Technology – 500mA, Low Voltage, Very Low Dropout Linear Regulator | |||
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FEATURES
n VIN Range: 0.9V to 10V
n Dropout Voltage: 160mV Typical
n Output Current: 500mA
n Adjustable Output (VREF = VOUT(MIN) = 200mV)
n Fixed Output Voltages: 1.2V, 1.5V, 1.8V
n Stable with Low ESR, Ceramic Output Capacitors
(3.3μF Minimum)
n 0.2% Load Regulation from 0mA to 500mA
n Quiescent Current: 120μA (Typ)
n 3μA Typical Quiescent Current in Shutdown
n Current Limit Protection
n Reverse-Battery Protection
n No Reverse Current
n Thermal Limiting with Hysteresis
n 16-Pin DFN (5mm à 5mm) and 8-Lead
SO Packages
APPLICATIONS
n Low Current Regulators
n Battery-Powered Systems
n Cellular Phones
n Pagers
n Wireless Modems
TYPICAL APPLICATION
1.8V to 1.5V, 500mA VLDO Regulator
VIN
1.8V
IN
OUT
3.3μF
LT3021-1.5
SHDN SENSE
GND
VOUT
1.5V
3.3μF 500mA
3021 TA01
LT3021/LT3021-1.2/
LT3021-1.5/LT3021-1.8
500mA, Low Voltage,
Very Low Dropout
Linear Regulator
DESCRIPTION
The LT®3021 is a very low dropout voltage (VLDOâ¢) lin-
ear regulator that operates from input supplies down to
0.9V. This device supplies 500mA of output current with
a typical dropout voltage of 160mV. The LT3021 is ideal
for low input voltage to low output voltage applications,
providing comparable electrical efï¬ciency to that of a
switching regulator.
The LT3021 regulator optimizes stability and transient
response with low ESR, ceramic output capacitors as small
as 3.3μF. Other LT3021 features include 0.05% typical line
regulation and 0.2% typical load regulation. In shutdown,
quiescent current typically drops to 3μA.
Internal protection circuitry includes reverse-battery pro-
tection, current limiting, thermal limiting with hysteresis,
and reverse-current protection. The LT3021 is available as
an adjustable output device with an output range down to
the 200mV reference. Three ï¬xed output voltages, 1.2V,
1.5V and 1.8V, are also available.
The LT3021 regulator is available in the low proï¬le
(0.75mm) 16-pin (5mm à 5mm) DFN package with ex-
posed pad and the 8-lead SO package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. VLDO is
a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Minimum Input Voltage
1.1 IL = 500mA
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3021 TA02
3021fc
1
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