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LT3024

3024f

Dual 100mA/500mA

Low Dropout, Low Noise,

Micropower Regulator

s

Low Noise: 20

s

Low Quiescent Current: 30

µA/Output

s

Wide Input Voltage Range: 1.8V to 20V

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Output Current: 100mA/500mA

s

Very Low Shutdown Current: <0.1

s

Low Dropout Voltage: 300mV at 100mA/500mA

s

Adjustable Outputs from 1.22V to 20V

s

Stable with 1

µF/3.3µF Output Capacitor

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Stable with Aluminum, Tantalum or

Ceramic Capacitors

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Reverse-Battery Protected

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No Reverse Current

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No Protection Diodes Needed

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Overcurrent and Overtemperature Protected

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Thermally Enhanced 16-Lead TSSOP and 12-Lead

(4mm

× 3mm) DFN Packages

The LT

out regulator. With an external 0.01

µF bypass capacitor,

output noise drops to 20

bandwidth. Designed for use in battery-powered systems,

the low 30

µA quiescent current per output makes it an

ideal choice. In shutdown, quiescent current drops to less

than 0.1

µA. Shutdown control is independent for each

output, allowing for flexibility in power management. The

device is capable of operating over an input voltage range

of 1.8V to 20V. The device can supply 100mA of output

current from Output 2 with a dropout voltage of 300mV.

Output 1 can supply 500mA of output current with a

dropout voltage of 300mV. Quiescent current is well

controlled in dropout.

The LT3024 regulator is stable with output capacitors as

low as 1

µF for the 100mA output and 3.3µF for the 500mA

output. Small ceramic capacitors can be used without the

series resistance required by other regulators.

Internal protection circuitry includes reverse-battery pro-

tection, current limiting, thermal limiting and reverse

current protection. The device is available as an adjustable

device with a 1.22V reference voltage. The LT3024 regu-

lator is available in the thermally enhanced 16-lead TSSOP

and 12-lead, low profile (4mm

× 3mm × 0.75mm) DFN

packages.

10Hz to 100kHz Output Noise

3.3V/2.5V Low Noise Regulators

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Cellular Phones

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Pagers

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Battery-Powered Systems

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Frequency Synthesizers

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Wireless Modems

, LTC and LT are registered trademarks of Linear Technology Corporation.

100

µV/DIV

20

3024 TA01b

3.7V TO

20V

3.3V AT 500mA

20

249k

0.01

µF

10

µF

1

µF

422k

3024 TA01a

OUT2

2.5V AT 100mA

20

ADJ2

BYP2

GND

249k

0.01

µF

10

µF

261k

IN

SHDN1

SHDN2

OUT1

ADJ1

BYP1

LT3024

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO