LTC1261LCS8-4.5 Datasheet

IC型號：
LTC1261LCS8-4.5
PDF描述：
Switched Capacitor Regulated Voltage Inverter
文件大?。?/label>
185.98KB
PDF頁數(shù)：
12頁
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LTC1261L

Switched Capacitor

Regulated Voltage Inverter

FEATURES

DESCRIPTIO

Regulated Negative Voltage from a

Single Positive Supply

REG Pin Indicates Output is in Regulation

Adjustable or Fixed Output Voltages

Output Regulation:

鹵3.5%

Supply Current: 650碌A Typ

Shutdown Mode Drops Supply Current to 5碌A

Up to 20mA Output Current

Requires Only Three or Four External Capacitors

Available in MS8 and SO-8 Packages

The LTC

廬

1261L is a switched-capacitor voltage inverter

designed to provide a regulated negative voltage from a

single positive supply. The LTC1261L operates from a

single 2.7V to 5.25V supply and provides an adjustable

output voltage from 鈥?.23V to 鈥?5V. The LTC1261L-4/

LTC1261L-4.5 needs a single 4.5V to 5.25V supply and

provides a fixed output voltage of 鈥?4V to 鈥?4.5V respec-

tively. Three external capacitors are required: a 0.1碌F

flying capacitor and an input and output bypass capaci-

tors. An optional compensation capacitor at ADJ (COMP)

can be used to reduce the output voltage ripple.

Each version of the LTC1261L will supply up to 20mA

output current with guaranteed output regulation of

鹵3.5%.

The LTC1261L includes an open-drain REG output that

pulls low when the output is within 5% of the set value.

Quiescent current is typically 650碌A when operating and

5碌A in shutdown.

The LTC1261L is available in 8-pin MSOP and SO pack-

ages.

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

APPLICATIO S

GaAs FET Bias Generators

Negative Supply Generators

Battery-Powered Systems

Single Supply Applications

TYPICAL APPLICATION

Waveforms for 鈥?4V Generator with Power Valid

鈥?4V Generator with Power Valid

1碌F

0.1碌F

SHDN

10k

POWER VALID

OUT

= 鈥?V

AT 10mA

OUT

鈥?4V

SHDN

POWER VALID

1261L TA01

REG

LTC1261L-4

OUT

鈥?/div>

C3*

100pF

*OPTIONAL

GND

COMP

3.3碌F

0.1ms/DIV

1261L TAO2

標準包裝
100
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器
系列
-
類型
切換式電容器（充電泵），反相
輸出類型
固定
輸出數(shù)
1
輸出電壓
-4.5V
輸入電壓
4.5V
PWM 型
-
頻率 - 開關(guān)
650kHz
電流 - 輸出
20mA
同步整流器
無
工作溫度
0°C ~ 70°C
安裝類型
表面貼裝
封裝/外殼
8-SOIC（0.154"，3.90mm 寬）
包裝
管件
供應商設備封裝
8-SOIC

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LTC1261LCS8-4.5 Datasheet

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