LT1610 데이터 시트보기 (PDF) - Linear Technology

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LT1610

1.7MHz, Single Cell Micropower DC/DC Converter

Linear Technology 

FEATURES

s Uses Tiny Capacitors and Inductor

s Internally Compensated

s Low Quiescent Current: 30µA

s Operates with VIN as Low as 1V

s 3V at 30mA from a Single Cell

s 5V at 200mA from 3.3V

s High Output Voltage Capability: Up to 28V

s Low Shutdown Current: < 1µA

s Automatic Burst ModeTM Switching at Light Load

s Low VCESAT Switch: 300mV at 300mA

s 8-Lead MSOP and SO Packages

U

APPLICATIO S

s Pagers

s Cordless Phones

s Battery Backup

s LCD Bias

s Portable Electronic Equipment

LT1610

1.7MHz, Single Cell

Micropower

DC/DC Converter

DESCRIPTIO

The LT®1610 is a micropower fixed frequency DC/DC

converter that operates from an input voltage as low as 1V.

Intended for small, low power applications, it switches at

1.7MHz, allowing the use of tiny capacitors and inductors.

The device can generate 3V at 30mA from a single cell

(1V) supply. An internal compensation network can be

connected to the LT1610’s VC pin, eliminating two exter-

nal components. No-load quiescent current of the LT1610

is 30µA, and the internal NPN power switch handles a

300mA current with a voltage drop of 300mV.

The LT1610 is available in 8-lead MSOP and SO packages.

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

Burst Mode is a trademark of Linear Technology Corporation.

TYPICAL APPLICATIO

L1

4.7µH

D1

+

1 CELL

6

VIN

3

SHDN

5

SW

2

FB

C1

LT1610

22µF

8

7

COMP

GND

VC

PGND

1

4

VOUT

3V

30mA

R1

1M

R2 + C2

681k

22µF

C1, C2: AVX TAJA226M006R

D1: MOTOROLA MBR0520

L1: MURATA LQH1C4R7

1610 F01

Figure 1. 1-Cell to 3V Step-Up Converter

Efficiency

85

VOUT = 3V

80

VIN = 1.25V

75

VIN = 1.5V

70

VIN = 1V

65

60

55

50

0.1

1

10

LOAD CURRENT (mA)

100

1610 TA01

1

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