参数资料
| 型号： | SC196ULTRT |
| 厂商： | Semtech |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.5A 10MLPD |
| 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： | 0.8 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1.5A |
| 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-UFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-MLPD-UT（3x3） |
| 产品目录页面： | 1357 (CN2011-ZH PDF) |
| 其它名称： | SC196ULDKR |
SC196
1.5A Synchronous Buck Converter
with Integrated Power Devices
POWER MANAGEMENT
Description
The SC196 is a synchronous step-down converter with
integrated power devices designed for use in applications
using a single-cell Li-ion battery. Its wide input voltage
range also makes it suitable for use in systems with ? xed
3.3V or 5V supply rails available. The switching frequency is
nominally set to 1MHz, allowing the use of small inductors
and capacitors. The current rating of the internal MOSFET
switches allows a DC output current of 1.5A.
The output voltage is set by connecting a resistor divider
from the ? lter inductor to the feedback pin. See the
SC196A for pin-programmable output voltages.
The SC196 has a ? exible clocking methodology that
allows it to be synchronized to an external oscillator or
controlled by the internal oscillator. The device operates
in either forced PWM mode or in PSAVE mode. If PSAVE
mode is enabled, the part will automatically enter PFM at
light loads to maintain maximum ef ? ciency across the full
load range.
For noise sensitive applications, PSAVE mode can be
disabled by synchronizing to an external oscillator or
pulling the SYNC/PWM pin high. Shutdown turns off all
the control circuitry to achieve a typical shutdown current
of 0.1 μ A.
Typical Application Circuit
Features
Up to 95% ef ? ciency
V OUT adjustable from less than 0.8V to V IN
Output current — 1.5A
Input range — 2.5V to 5.5V
Quiescent current — 17 μ A
Fixed 1MHz frequency or 750kHz to 1.25MHz
synchronized operation
PSAVE operation to maximize ef ? ciency at light loads
Shutdown current <1 μ A
Fast transient response
100% duty cycle in dropout
Soft-start
Over-temperature and short-circuit protection
Lead-free package — MLPD10-UT, 3 x 3 x 0.6 mm
Applications
Cell phones
Wireless communication chipset power
Personal media players
Microprocessor/DSP core/IO power
PDAs and handheld computers
WLAN peripherals
USB powered modems
1 Li-Ion or 3 NiMH/NiCd powered devices
V IN
2.5V to 5.5V
C IN
10 μ F
VIN
PVIN
MODE
EN
SC196
LX
VOUT
ADJ
L1
4.7 μ H
R FB1
R FB2
V OUT
<0.8V to V IN
1.5A
C FB1
10pF
C OUT
22 μ F
SYNC/PWM
PGND
GND
February 8, 2007
1
www.semtech.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC197 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator |
| SC1972 | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:NPN EPITAXIAL PLANAR TYPE(for RF power amplifiers on VHF band Mobile radio applications) |
| SC197EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator |
| SC197ULTRT | 制造商:Semtech Corporation 功能描述:Conv DC-DC Single Step Down 2.9V to 5.5V 18-Pin MLPQ-UT EP T/R 制造商:Semtech Corporation 功能描述:IC DC-DC CONV 3.5MHz MLPQ-18 制造商:Semtech Corporation 功能描述:SC197 Series 0.8 V 500 mA Dual Channel Step-Down Regulator - MLPQ-UT-18 制造商:Semtech Corporation 功能描述:IC, DC-DC CONV, 3.5MHz, MLPQ-18; Primary Input Voltage:5.5V; No. of Outputs:1; Output Voltage:3.3V; Output Current:500mA; No. of Pins:18; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:18-MLPQ |
| SC198 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Dual DC-DC Buck Converter with High Current Capability |
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