LT3061_15 Datasheet, PDF (1/20 Pages) Linear Technology – 45V VIN, Micropower, Low Noise, 100mA LDO with Output Discharge

Features
n _{Input Voltage Range: 1.6V to 45V}
n _{Output Current: 100mA}
n _{Output Discharge}
n _{Quiescent Current: 45µA}
n _{Dropout Voltage: 250mV}
n _{Low Noise: 30µVRMS (10Hz to 100kHz)}
n _{Adjustable Output (VREF = 600mV)}
n _{Output Tolerance: ±2% Over Load, Line, and}
Temperature
n _{Single Capacitor Soft-Starts Reference and Lowers}
Output Noise
n _{Shutdown Current: < 3µA}
n _{Reverse Battery Protection}
n _{Current Limit Foldback and Thermal Limit Protection}
n _{8-Lead 2mm × 3mm DFN and MSOP Packages}
Applications
n _{Battery Powered Systems}
n _{Automotive Power Supplies}
n _{Industrial Power Supplies}
n _{Avionic Power Supplies}
n _{Portable Instruments}
LT3061
45V V_IN, Micropower,
Low Noise, 100mA LDO
with Output Discharge
Description
The LT^®3061 is a micropower, low dropout (LDO) linear
regulator that operates over a 1.6V to 45V supply range.
The device supplies 100mA of output current with a typi-
cal dropout voltage of 250mV. A single external capacitor
provides programmable low noise reference performance
and output soft-start functionality. The LT3061’s quiescent
current is merely 45μA and provides fast transient response
with a minimum 3.3μF output capacitor. In shutdown,
quiescent current is less than 3μA and the reference soft
start capacitor is reset.
The LT3061 features an NMOS pull-down that discharges
the output when SHDN or IN is driven low.
Internal protection circuitry includes reverse-battery
protection, reverse-current protection, current limit with
foldback and thermal shutdown.
The LT3061 is available as an adjustable device with an
output voltage range from the 600mV reference up to 19V.
The LT3061 is offered in the thermally enhanced 8-lead
2mm × 3mm DFN and MSOP packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Typical Application
1.8V Low Noise Regulator
IN
OUT
V_OUT
1.8V
V_IN
2.2V
1µF
LT3061
100mA
118k
1%
10µF
SHDN
ADJ
59k
GND BYP
1%
0.01µF
3061 TA01
Output Discharge
vs V_OUT C_REF/BYP = 0
12V
10V
8V
6V
5V
3.3V
2V
1.2V
0V
SHDN: 0 TO 1V
1ms/DIV
V_IN = V_OUT +1V
C_OUT = 10µF
I_FB-DIVIDER = 10µA
3061 TA01a
For more information www.linear.com/LT3061
3061f
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