参数资料
型号: LTC1261CS
厂商: Linear Technology
文件页数: 1/18页
文件大小: 0K
描述: IC REG SWITCHED CAP INV 14SOIC
标准包装: 55
类型: 切换式电容器(充电泵),反相
输出类型: 可调式
输出数: 1
输出电压: -1.25 V ~ -8 V
输入电压: 3 V ~ 8 V
频率 - 开关: 550kHz
电流 - 输出: 15mA
同步整流器:
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
包装: 管件
供应商设备封装: 14-SOIC
产品目录页面: 1339 (CN2011-ZH PDF)
LTC1261
Switched Capacitor
Regulated Voltage Inverter
Regulated Negative Voltage from a
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
GaAs FET Bias Generators
Negative Supply Generators
Battery-Powered Systems
Single Supply Applications
FEATURES
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Single Positive Supply
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APPLICATIONS
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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.
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
capacitor and provides adjustable and fixed output voltage
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.
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-lead narrow body SO
package and an 8-lead SO package.
TYPICAL APPLICATION
–4V Generator with Power Valid
5V
Waveforms for –4V Generator with Power Valid
5V
1
V CC
SHDN
8
10k
0V
C1
1μF
C2
0.1μF
*OPTIONAL
2
3
4
C1 + REG
LTC1261-4
C1 – OUT
GND COMP
7
6
5
C3*
100pF
POWER VALID
V OUT = –4V
AT 10mA
C4
3.3μF
LTC1261 ? TA01
OUT
–4V
5V
SHDN
0V
5V
POWER VALID
0V
0.2ms/DIV
LTC1261 ? TA02
1261fb
For more information www.linear.com/LTC1261
1
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LTC1261CS#PBF 功能描述:IC REG SWITCHED CAP INV 14SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压(降压) 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘,8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?(2x2) 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2
LTC1261CS#TR 功能描述:IC REG SWITCHED CAP INV 14SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压(升压) 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式,混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC(0.154",3.90mm 宽) 包装:带卷 (TR) 供应商设备封装:8-SOIC
LTC1261CS#TRPBF 功能描述:IC REG SWITCHED CAP INV 14SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压(升压) 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式,混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC(0.154",3.90mm 宽) 包装:带卷 (TR) 供应商设备封装:8-SOIC
LTC1261CS8 功能描述:IC REG SWITCHD CAP INV ADJ 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压(升压) 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式,混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC(0.154",3.90mm 宽) 包装:带卷 (TR) 供应商设备封装:8-SOIC
LTC1261CS8#PBF 功能描述:IC REG SWITCHD CAP INV ADJ 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压(降压) 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON(1.45x1) 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2