参数资料
| 型号： | SC121ULTRT |
| 厂商： | Semtech |
| 文件页数： | 1/23页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC 3.3V/ADJ 6MLPD |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 3.3V，1.8 V ~ 5 V |
| 输入电压： | 0.7 V ~ 4.5 V |
| 频率 - 开关： | 1.2MHz |
| 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-MLPD-UT |
| 包装： | 标准包装 |
| 供应商设备封装： | 6-MLPD-UT（1.5x2.0） |
| 其它名称： | SC121ULTRTDKR |
SC121
Low Voltage Synchronous
Boost Regulator
POWER MANAGEMENT
Features
Input voltage — 0.7V to 4.5V
Minimum start-up voltage — 0.85V
Output voltage — fixed at 3.3V; adjustable from 1.8V
to 5.0V
Peak input current limit — 1.2A
Output current at 3.3 V OUT — 80mA with V IN = 1.0V,
190mA with V IN = 1.5V
Forced PWM operation at all loads
Effi ciency up to 94%
Internal synchronous rectifier
No forward conduction path during shutdown
Switching frequency — 1.2MHz
Soft-start startup current limiting
Shutdown current — 0.1μA (typ)
Ultra-thin 1.5 × 2.0 × 0.6 (mm) MLPD-UT-6 package
Lead-free and halogen-free
WEEE and RoHS compliant
Applications
MP3 players
Smart phones and cellular phones
Palmtop computers and handheld instruments
PCMCIA cards and memory cards
Digital cordless phones
Description
The SC121 is a high efficiency, low noise, synchronous
step-up DC-DC converter that provides boosted voltage
levels in low-voltage handheld applications. The wide
input voltage range allows use in systems with single
NiMH or alkaline battery cells as well as in systems with
higher voltage battery supplies. It features an internal
1.2A switch and synchronous rectifier to achieve up to
94% effi ciency and to eliminate the need for an external
Schottky diode. The output voltage can be set to 3.3V
with internal feedback, or to any voltage within the speci-
fied range using a standard resistor divider.
The SC121 operates exclusively in Pulse Width Modulation
(PWM) mode for low ripple and fixed-frequency switching.
Output disconnect capability is included to reduce leakage
current, improve effi ciency, and eliminate external com-
ponents sometimes needed to disconnect the load from
the supply during shutdown.
Low quiescent current is maintained with a high 1.2MHz
operating frequency. Small external components and the
space saving MLPD-UT-6, 1.5×2.0×0.6 (mm) package
make this device an excellent choice for small handheld
applications that require the longest possible battery life.
Personal medical products
Wireless VoIP phones
Small motors
Typical Application Circuit
L1
IN
LX
Single
Cell
EN
OUT
3.3V
(1.2V)
C IN
GND
FB
C OUT
SC121
April 13, 2010
? 2010 Semtech Corporation
1
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| SC122 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Low Voltage Synchronous Boost Converter |
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| SC122ULTRT | 功能描述:IC REG BST SYNC 3.3V 95MA 6MLPD 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 |
| SC-1230 | 制造商:Nidec Copal 功能描述:SWIT ROTARY 16 SLOT SHAFT PC PINS 0.1A 5VDC - Bulk |
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