Datasheet > LTC1261

LTC1261

更新时间： 2024-11-22 22:39:47

品牌	Logo	应用领域
凌特 - Linear		开关
页数	文件大小	规格书
16页	313K
描述
Switched Capacitor Regulated Voltage Inverter

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中文翻译

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LTC1261 数据手册

LTC1261

Switched Capacitor

Regulated Voltage Inverter

DESCRIPTIO

EATURE

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

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 volt-

ages 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-pin 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.

■

^{Available in SO-8}O ^PaU ^ckages

PPLICATI

■

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.

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

package and an 8-pin SO package.

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

TYPICAL APPLICATION

Waveforms for –4V Generator with Power Valid

–4V Generator with Power Valid

OUT

SHDN

REG

10k

–4V

POWER VALID

1µF

0.1µF

LTC1261-4

SHDN

= –4V

–

OUT

AT 10mA

3.3µF

POWER VALID

GND

COMP

C3*

100pF

*OPTIONAL

LTC1261 • TA01

0.2mS/DIV

LTC1261 • TAO2

12 3 4 5 6 7...16

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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