Datasheet > LTC1261

LTC1261

更新时间： 2024-09-24 14:57:55

品牌	Logo	应用领域
亚德诺 - ADI		开关电容器转换器
页数	文件大小	规格书
18页	495K
描述
开关电容器稳压负输出转换器

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LTC1261 数据手册

LTC1261

Switched Capacitor

Regulated Voltage Inverter

FEATURES

DESCRIPTION

The LTC^®1261 is a switched-capacitor voltage inverter

designed to provide a regulated negative voltage from

a single positive supply. The LTC1261CS operates from

a single 3V to 8V supply and provides an adjustable

output voltage from –1.25V to –8V. An on-chip resistor

string allows the LTC1261CS to be configured for output

voltages of –3.5V, –4V, –4.5V or –5V with no external

components. The LTC1261CS8 is optimized for applica-

tions which use a 5V or higher supply or which require

low output voltages. It requires a single external 0.1µF

capacitorandprovidesadjustableandfixedoutputvoltage

options in 8-lead SO packages. The LTC1261CS requires

one or two external 0.1µF capacitors, depending on input

voltage. Both versions require additional external input

and output bypass capacitors. An optional compensation

capacitor at ADJ/COMP can be used to reduce the output

voltage ripple.

Regulated Negative Voltage from a

Single Positive Supply

Can Provide Regulated –5V from a 3V Supply

REG Pin Indicates Output is in Regulation

Low Output Ripple: 5mV Typ

Supply Current: 600µA Typ

Shutdown Mode Drops Supply Current to 5µA

Up to 15mA Output Current

Adjustable or Fixed Output Voltages

Requires Only Three or Four External Capacitors

Available in SO-8 Packages

APPLICATIONS

GaAs FET Bias Generators

Negative Supply Generators

Battery-Powered Systems

Single Supply Applications

Each version of the LTC1261 will supply up to 12mA

output current with guaranteed output regulation of 5%.

The LTC1261 includes an open-drain REG output which

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

Output ripple is typically as low as 5mV. Quiescent current

is typically 600µA when operating and 5µA in shutdown.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

The LTC1261 is available in a 14-lead narrow body SO

package and an 8-lead SO package.

TYPICAL APPLICATION

Waveforms for –4V Generator with Power Valid

–4V Generator with Power Valid

OUT

SHDN

REG

10k

POWER VALID

= –4V

1µF

–4V

LTC1261-4

0.1µF

–

OUT

SHDN

AT 10mA

3.3µF

GND

COMP

C3*

100pF

POWER VALID

LTC1261 • TA01

*OPTIONAL

LTC1261 • TA02

0.2ms/DIV

1261fb

For more information www.linear.com/LTC1261

12 3 4 5 6 7...18

中文翻译

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与LTC1261相关器件

型号	品牌	获取价格	描述	数据表
LTC1261CS	Linear	获取价格	Switched Capacitor Regulated Voltage Inverter
LTC1261CS#PBF	Linear	获取价格	LTC1261 - Switched Capacitor Regulated Voltage Inverter; Package: SO; Pins: 14; Temperatur
LTC1261CS8	Linear	获取价格	Switched Capacitor Regulated Voltage Inverter
LTC1261CS8#TR	Linear	获取价格	LTC1261 - Switched Capacitor Regulated Voltage Inverter; Package: SO; Pins: 8; Temperature
LTC1261CS8#TRPBF	Linear	获取价格	LTC1261 - Switched Capacitor Regulated Voltage Inverter; Package: SO; Pins: 8; Temperature
LTC1261CS8-4	Linear	获取价格	Switched Capacitor Regulated Voltage Inverter
LTC1261CS8-4#TRPBF	Linear	获取价格	LTC1261 - Switched Capacitor Regulated Voltage Inverter; Package: SO; Pins: 8; Temperature
LTC1261CS84.5	Linear	获取价格	IC SWITCHED CAPACITOR REGULATOR, 550 kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, SOIC-8, Switc
LTC1261CS8-4.5	Linear	获取价格	Switched Capacitor Regulated Voltage Inverter
LTC1261CS8-4.5#PBF	Linear	获取价格	LTC1261 - Switched Capacitor Regulated Voltage Inverter; Package: SO; Pins: 8; Temperature

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