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| 型号： | LTC1144IS8 |
| 厂商： | Linear Technology |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP INV 8SOIC |
| 标准包装： | 100 |
| 类型： | 切换式电容器（充电泵），反相 |
| 输出数： | 1 |
| 输入电压： | 2 V ~ 18 V |
| 频率 - 开关： | 4kHz ~ 10kHz |
| 电流 - 输出： | 50mA |
| 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： | 管件 |
| 供应商设备封装： | 8-SOIC |
LTC1144
Switched-Capacitor
Wide Input Range
Voltage Converter
with Shutdown
FEATURE S
D ESCRIPTIO
s
s
s
s
s
s
s
s
Wide Operating Supply Voltage Range: 2V to 18V
Boost Pin (Pin 1) for Higher Switching Frequency
Simple Conversion of 15V to –15V Supply
Low Output Resistance: 120 ? Maximum
Power Shutdown to 8 μ A with SHDN Pin
Open Circuit Voltage Conversion Efficiency:
99.9% Typical
Power Conversion Efficiency: 93% Typical
Easy to Use
The LTC1144 is a monolithic CMOS switched-capacitor
voltage converter. It performs supply voltage conversion
from positive to negative from an input range of 2V to 18V,
resulting in complementary output voltages of –2V to
–18V. Only two noncritical external capacitors are needed
for the charge pump and charge reservoir functions.
The converter has an internal oscillator that can be
overdriven by an external clock or slowed down when
connected to a capacitor. The oscillator runs at a 10kHz
Conversion of 15V to ± 15V Supplies
Inexpensive Negative Supplies
A PPLICATI S
s
s
frequency when unloaded. A higher frequency outside the
audio band can also be obtained if the Boost Pin is tied to
V + . The SHDN pin reduces supply current to 8 μ A and can
be used to save power when the converter is not in use.
s
s
s
s
s
Data Acquisition Systems
High Voltage Upgrade to LTC1044 or 7660
Voltage Division and Multiplications
Automotive Applications
Battery Systems with Wall Adapter/Charger
The LTC1144 contains an internal oscillator, divide-by-
two, voltage level shifter, and four power MOSFETs. A
special logic circuit will prevent the power N-channel
switch substrate from turning on.
TYPICAL A PPLICATI
Generating –15V from 15V
Output Voltage vs Load Current, V + = 15V
1
LTC1144
BOOST
V +
8
15V INPUT
–15
R OUT = 56 ?
T A = 25°C
10 μ F
+
2
3
CAP +
GND
OSC
SHDN
7
6
–14
4
CAP –
V OUT
5
10 μ F
–15V OUTPUT
–13
–12
1144 TA01
–11
–10
0
10
20
30
40
50
LOAD CURRENT (mA)
1144 TA02
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1144IS8#PBF | 功能描述:IC REG SWITCHED CAP INV 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 |
| LTC1144IS8#PBF | 制造商:Linear Technology 功能描述:DC/DC Charge Pump Converter IC |
| LTC1144IS8#TR | 功能描述:IC REG SWITCHED CAP INV 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 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:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC1144IS8#TRPBF | 功能描述:IC REG SWITCHED CAP INV 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 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:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC1144IS8PBF | 制造商:Linear Technology 功能描述:Charge Pump Step-Dn -18--2V 50mA SO8 |
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