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LT3027_15

Description
Dual 100mA, Low Dropout, Low Noise, Micropower Regulator with Independent Inputs
File Size308KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LT3027_15 Overview

Dual 100mA, Low Dropout, Low Noise, Micropower Regulator with Independent Inputs

LT3027
Dual 100mA,
Low Dropout, Low Noise,
Micropower Regulator with
Independent Inputs
FEATURES
DESCRIPTIO
Low Noise: 20µV
RMS
(10Hz to 100kHz)
Low Quiescent Current: 25µA/Channel
Independent Inputs
Wide Input Voltage Range: 1.8V to 20V
Output Current: 100mA/Channel
Very Low Shutdown Current: <0.1
µ
A
Low Dropout Voltage: 300mV at 100mA
Adjustable Output from 1.22V to 20V
Stable with 1µF Output Capacitor
Stable with Aluminum, Tantalum or
Ceramic Capacitors
Reverse Battery Protected
No Protection Diodes Needed
Overcurrent and Overtemperature Protected
Tracking/Sequencing Capability
Thermally Enhanced 10-Lead MSOP and DFN
Packages
APPLICATIO S
Cellular Phones
Pagers
Battery-Powered Systems
Frequency Synthesizers
Wireless Modems
Tracking/Sequencing Power Supplies
The LT
®
3027 is a dual, micropower, low noise, low drop-
out regulator with independent inputs. With an external
0.01µF bypass capacitor, output noise is a low 20µV
RMS
over a 10Hz to 100kHz bandwidth. Designed for use in
battery-powered systems, the low 25µA quiescent current
per channel makes it an ideal choice. In shutdown, quies-
cent current drops to less than 0.1µA. Shutdown control
is independent for each channel, allowing for flexibility in
power management. The device is capable of operating
over an input voltage from 1.8V to 20V, and can supply
100mA of output current from each channel with a drop-
out voltage of 300mV. Quiescent current is well controlled
in dropout.
The LT3027 regulator is stable with output capacitors as
low as 1µF. Small ceramic capacitors can be used without
the series resistance required by other regulators.
Internal protection circuitry includes reverse battery pro-
tection, current limiting and thermal limiting protection.
The device is available as an adjustable device with a
1.22V reference voltage. The LT3027 regulator is available
in the thermally enhanced 10-lead MSOP and low profile
(0.75mm) 3mm
×
3mm DFN packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6118263, 6144250.
TYPICAL APPLICATIO
V
IN1
3.7V TO
20V
IN1
1µF
SHDN1
BYP1
ADJ1
OUT1
3.3V/2.5V Low Noise Regulators
3.3V AT 100mA
20µV
RMS
NOISE
0.01µF
422k
10µF
10Hz to 100kHz Output Noise
249k
LT3027
V
IN2
2.9V TO
20V
IN2
1µF
SHDN2
BYP2
ADJ2
GND
249k
3027 TA01
V
OUT
100µV/DIV
OUT2
0.01µF
261k
2.5V AT 100mA
20µV
RMS
NOISE
10µF
U
20µV
RMS
3027 TA01b
U
U
3027fa
1
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