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| 型号： | SC190BIMLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.3A 10MLP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调 |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 300mA |
| 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： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-MLP（3x3） |
| 产品目录页面： | 1357 (CN2011-ZH PDF) |
| 其它名称： | SC190BIMLDKR |
Features
POWERMANAGEMENT
Description
The SC190 is a synchronous step-down converter with
integrated power devices and an integrated front-end
LDO to minimize input supply ripple. Output voltage is
programmable using two control bits, eliminating the need
for feedback resistors tied to the output. The device is
offered in four distinct variants with each variant providing
four ?xed output voltage options to choose from.
The front-end LDO can be bypassed externally to maximize
ef?ciency. A second LDO is switched in place of the
switching regulator for low current operation to further
improve ef?ciency and reduce noise.
The SC190’s ?exible clocking scheme allows it to be
synchronized to an external oscillator or controlled by the
internal oscillator. The 1MHz switching frequency allows
the use of small inductors and capacitors.
The internal MOSFET switches provide peak current
greater than 500mA to achieve a DC output of at least
300mA. Shutdown current is typically 0.1μA.
The SC190 has four different variants with four voltage
settings each. It is designed for single-cell Li-ion battery
applications, but also performs well in ?xed 3.3V and 5V
applications.
Typical Application Circuit
SC190
Synchronous Buck Converter
with Programmable Output
Features
? Less than 1mV Supply Ripple
? Output Voltage Regulated by Either the Switching
Regulator or Linear Regulator
? Dynamic Handover Between Linear and Switching
Regulator for Maximum Ef?ciency
? 2.7V to 5.5V Input Range
? 300mA Guaranteed Output Current
? Fixed Frequency 1MHz Operation or 750kHz to
1.5MHz Clocked Operation
? No Schottky Diode Required
? Up to 95% Ef?ciency (VIN=BP)
? Over-current Protection
? Over-voltage Protection
? Over-temperature Protection
? Soft Start
? MLP-10, 3 x 3mm Lead-frame, Lead-free Package
? Low Output Noise < 100μVrms
Applications
? Cell Phones
? Cordless Phones
? Notebook and Subnotebook Computers
? PDAs and Mobile Communicators
? WLAN Peripherals
? 1 Li-Ion or 3 NiMH/NiCd Powered Devices
VIN
VIN
EN
SC190
LX
VOUT
4.7μH
LOUT
VOUT
CIN
4.7μF
SYNC/PWM
VID0
VID1
BP
CBP
COUT
4.7μF
June 30, 2005
MODE
1
GND
4.7μF
www.semtech.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC190CEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Synchronous Buck Converter with Programmable Output |
| SC190CIMLTRT | 功能描述:IC REG BUCK SYNC ADJ 0.3A 10MLP 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:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| SC190DEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Synchronous Buck Converter with Programmable Output |
| SC190DIMLTRT | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Synchronous Buck Converter with Programmable Output |
| SC191 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Low Supply Ripple Synchronous Buck Conversion Regulator |
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