LTC1682IMS8-3.3 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1682IMS8-3.3

Doubler Charge Pumps with Low Noise Linear Regulator

Linear Technology 

Prev 11 12

LTC1682/LTC1682-3.3/LTC1682-5

TYPICAL APPLICATION

Wide Input Range VCO Supply (VIN > 4.4V)

VIN

3V TO 6V

Q1

FMMT3904

3V

(REQUIRED FOR

START-UP)

D1

1N4148

C4

4.7µF

C3

4.7µF

C1

0.22µF

8

CPO

1

VOUT

7 C+

2

SHDN

LTC1682-5

6

3

VIN

FILT

5 C–

GND 4

R1

470Ω

SHUTDOWN

CFILT

1nF

5V

LOW NOISE

C2

4.7µF

VCO

1682 ta04

RELATED PARTS

PART NUMBER

LTC1340

LTC1517-X

LT1521

LTC1522

LT1761 Series

DESCRIPTION

Low Noise, Voltage-Boosted Varactor Driver

Micropower, Regulated Charge Pump Doubler in SOT-23

300mA Low Dropout Regulator

Micropower, Regulated 5V Charge Pump

100mA Low Noise LDO Regulator in SOT-23

COMMENTS

Generates 5V Varactor Drive from 3V Supply

ICC = 6µA; Short Circuit/Thermal Protected

Micropower; Good Transient Response

Ultralow Power: Typical Operating ICC = 6µA

ICC = 20µA; 20µVRMS Output Noise

12 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com

128235fs, sn128235 LT/TP 0799 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1999

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