参数资料
| 型号： | SC174MLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 10MLPD |
| 产品培训模块： | Power Supplies 101 |
| 标准包装： | 1 |
| 系列： | EcoSpeed® |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.75 V ~ 5.23 V |
| 输入电压： | 3 V ~ 5.5 V |
| 频率 - 开关： | 200kHz ~ 1MHz |
| 电流 - 输出： | 4A |
| 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-MLPD（3x3） |
| 其它名称： | SC174MLDKR |
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SC174
4A EcoSpeed TM Synchronous Step-Down
V IN : 3V to 5.5V
V OUT : 0.75V to 95% x V IN
I OUT : Up to 4A
Low R DS(ON) Switches
POWERMANAGEMENT
Features
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Up to 95% Peak Efficiency
? High Output Accuracy
? Small Ceramic Capacitors
? Power Good Pin (Open-Drain)
? Patented Adaptive On-Time Control:
Excellent Transient Response
Regulator with Optional Ultrasonic Power Save
Description
The SC174 is an integrated, synchronous 4A EcoSpeed TM
step-down regulator, which incorporates Semtech’s
advanced, patented adaptive on-time architecture to
achieve best-in-class performance in dynamic point-of-
load applications. The input voltage range is 3V to 5.5V
with a programmable output voltage from 0.75V up to
95% x V IN . The device features low-R DS(ON) internal switch-
es and optional PSAVE mode for high efficiency across
the output load range.
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Programmable Pseudo-fixed Frequency
Fault Protection Features:
Cycle-by-Cycle Current Limit
Short Circuit Protection
Over and Under Output Voltage Protection
Over-Temperature
Internal Soft start
Ultrasonic Power Save
Smart Power Save
Ultra-Small Lead-Free 3x3mm, 10-Pin MLPD Package
Fully WEEE and RoHS Compliant
Adaptive on-time control provides programmable pseu-
do-fixed frequency operation and excellent transient
performance. The switching frequency can be set from
200kHz to 1MHz - allowing the designer to reduce exter-
nal LC filtering and minimize light load (standby) losses.
Disabling PSAVE operation reduces output voltage ripple
at light load for ceramic output capacitors.
Additional features include cycle-by-cycle current limit,
soft start, input UVLO and output OV protection, and
over temperature protection. The open-drain PGOOD
Applications
pin provides output status. Standby current is less than
10μA when disabled.
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Networking Equipment, Embedded Systems
Medical Equipment, Office Automation
Instrumentation, Portable Systems
Consumer Devices (DTV, Set-top Box, ... )
5V POL Converters
The device is available in a low profile, thermally en-
hanced MLPD-3x3mm 10-pin package.
Typical Application Circuit
3 to 5.5V
VIN
VDD
SC174
BST
LX
FB
PGOOD
Power Good
VOUT = 0.75V to 95% VIN
Enable /
Power Save
EN/PSV
PGND
TON
AGND
October 19, 2010
? 2010 Semtech Corporation
1
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