Step-Down Regulator. SC171 Datasheet

SC171 Regulator. Datasheet pdf. Equivalent

Part SC171
Description Synchronous Step-Down Regulator
Feature SC171 POWER MANAGEMENT 1A EcoSpeedTM Synchronous Step-Down Regulator with Optional Ultrasonic Powe.
Manufacture Semtech
Datasheet
Download SC171 Datasheet

SC171 POWER MANAGEMENT 1A EcoSpeedTM Synchronous Step-Down SC171 Datasheet
3-TERMINAL REGULATOR (-3.3V) SC1714 February 2, 1998 TEL: SC1714 Datasheet
Recommendation Recommendation Datasheet SC171 Datasheet




SC171
SC171
POWER MANAGEMENT
1A EcoSpeedTM Synchronous Step-Down
Regulator with Optional Ultrasonic Power Save
Features
VIN: 3V to 5.5V
VOUT: 0.75V to 95% x VIN
IOUT: Up to 1A
Low RDS(ON) Switches
Up to 95% Peak Efficiency
High Output Accuracy
Small Ceramic Capacitors
Power Good Pin (Open-Drain)
Patented Adaptive On-Time Control:
Excellent Transient Response
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
Applications
Networking Equipment, Embedded Systems
Medical Equipment, Office Automation
Instrumentation, Portable Systems
Consumer Devices (DTV, Set-top Box, ... )
5V POL Converters
Description
The SC171 is an integrated, synchronous 1A EcoSpeedTM
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 VIN. The device features low-RDS(ON) internal switch-
es and optional PSAVE mode for high efficiency across
the output load range.
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
pin provides output status. Standby current is less than
10μA when disabled.
The device is available in a low profile, thermally en-
hanced MLPD-3x3mm 10-pin package.
Typical Application Circuit
3 to 5.5V
VIN BST
LX
SC 171
VOUT = 0.75 V to 95% VIN
VDD
FB
PGOOD
Power Good
Enable /
Power Save
EN/ PSV
PGND
TON
AGND
October 11 , 2010
© 2010 Semtech Corporation




SC171
Pin Configuration
BST
VIN
LX
PGND
PGOOD
VDD
AGND
TON
EN/PSV
FB
10 Pin MLPD
θJA= 40°C/W.
Marking Information
TOP MARKING
SC171
Ordering Information
Device
Top Mark
Package(2)
SC171MLTRT(1)
171
MLPD-10 3x3
SC171EVB
Evaluation Board
Notes:
1) Available in tape and reel packaging only. A reel contains 3000
devices.
2) Available in lead-free packaging only. WEEE compliant and Halogen
free. This component and all homogenous sub-components are RoHS
compliant.
171
yyww
xxxx
yyww= Date Code(Example:0952)
xxxx = Semtech Lot Number(Example:3901)
© 2010 Semtech Corporation






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