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参数资料
| 型号： | LTC1261CS84.5 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 550 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | PLASTIC, SOIC-8 |
| 文件页数： | 1/16页 |
| 文件大小： | 266K |
| 代理商： | LTC1261CS84.5 |
1
LTC1261
S
FEATURE
D
U
ESCRIPTIO
s
Regulated Negative Voltage from a
Single Positive Supply
s
Can Provide Regulated – 5V from a 3V Supply
s
REG Pin Indicates Output is in Regulation
s
Low Output Ripple: 5mV Typ
s
Supply Current: 600
A Typ
s
Shutdown Mode Drops Supply Current to 5
A
s
Up to 15mA Output Current
s
Adjustable or Fixed Output Voltages
s
Requires Only Three or Four External Capacitors
s
Available in SO-8 Packages
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 0.1
F
capacitor and provides adjustable and fixed output voltage
options in 8-pin SO packages. The LTC1261CS requires
one or two external 0.1
F 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 600
A when operating and 5A in shutdown.
The LTC1261 is available in a 14-pin narrow body SO
package and an 8-pin SO package.
Switched Capacitor
Regulated Voltage Inverter
s
GaAs FET Bias Generators
s
Negative Supply Generators
s
Battery-Powered Systems
s
Single Supply Applications
U
S
A
O
PPLICATI
TYPICAL APPLICATION
U
– 4V Generator with Power Valid
, LTC and LT are registered trademarks of Linear Technology Corporation.
1
2
3
4
8
7
6
5
LTC1261-4
SHDN
REG
OUT
COMP
VCC
C1+
C1–
GND
C2
0.1
F
LTC1261 TA01
C4
3.3
F
VOUT = –4V
AT 10mA
POWER VALID
5V
C1
1
F
5V
10k
C3*
100pF
*OPTIONAL
+
Waveforms for – 4V Generator with Power Valid
0V
OUT
–4V
5V
SHDN
0V
5V
POWER VALID
0V
0.2mS/DIV
LTC1261 TAO2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1261IS8 | 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 |
| LTC1261IS8#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: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 |
| LTC1261IS8#TR | 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 |
| LTC1261IS8#TRPBF | 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: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 |
| LTC1261LCMS8 | 功能描述:IC REG SWITCHD CAP INV ADJ 8MSOP 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 |
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