Datasheet > LT1614

LT1614

更新时间： 2024-09-14 22:51:47

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
8页	221K
描述
Inverting 600kHz Switching Regulator

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LT1614 数据手册

Final Electrical Specifications

LT1614

Inverting 600kHz

Switching Regulator

July 1998

DESCRIPTION

FEATURES

The LT^®1614 is a fixed frequency, inverting mode switch-

ing reglator that operates from an input voltage as low as

1V. Utilizing a low noise topology, the LT1614 can gener-

ate a negative output down to –24V from a 1V to 5V input.

Fixed frequency switching ensures a clean output free

from low frequency noise. The device contains a low-

battery detector with a 200mV reference and shuts down

tolessthan10µA.NoloadquiescentcurrentoftheLT1614

is 1mA and the internal NPN power switch handles a

500mA current with a voltage drop of just 295mV.

■

Better Regulation Than a Charge Pump

■

0.1Ω Effective Output Impedance

■

–5V at 200mA from a 5V Input

600kHz Fixed Frequency Operation

Operates with V_INas Low as 1V

1mA Quiescent Current

Low Shutdown Current: 10µA

Low-Battery Detector

Low V_CESATSwitch: 295mV at 500mA

APPLICATIONS

High frequency switching enables the use of small induc-

tors and capacitors. Ceramic capacitors can be used in

many applications, eliminating the need for bulky tanta-

lum types.

■

MR Head Bias

■

LCD Bias

■

GaAs FET Bias

Positive-to-Negative Conversion

■

The LT1614 is available in 8-lead MSOP or SO packages.

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

TYPICAL APPLICATION

5V to –5V Converter

5V to –5V Converter Efficiency

1µF

22µH

OUT

–5V

SHDN

LT1614

200mA

69.8k

24.9k

33µF

NFB

GND

100k

1nF

1614 TA01

C1, C2: AVX TAJB336M010

C3: AVX 1206CY106

D1: MBR0520

100

300

L1, L2: MURATA LQH3C220

LOAD CURRENT (mA)

1614 TA02

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

12 3 4 5 6 7 8

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