SC220STRT Semtech Corporation, SC220STRT Datasheet

SC220STRT

Manufacturer Part Number

SC220STRT

Description

SOIC 8/20MHZ BUCK REG/ NON-PORTABLE

Manufacturer

Semtech Corporation

Datasheet

1.SC220STRT.pdf (14 pages)

Specifications of SC220STRT

Pack_quantity

2500

Comm_code

85423990

Lead_time

Current page: 1 of 14
Download datasheet (359Kb)

POWER MANAGEMENT

Features



Applications



Typical Application Circuit

January 25, 2012

Patented X-EMI

Effi ciency up to 90%

19μA Quiescent Current under Very Light-load

Wide Input Voltage Range — 2.7V to 5.5V

Adjustable Output Voltage Down to 1.0V

Output DC Current — up to 650mA

High Light-load Effi ciency via Automatic PSAVE Mode

Ultra-fast Transient Response — <1μs

Temperature Range — -40 to +85°C

Shutdown Current — 0.1μA (typical)

Requires Tiny 220nH Inductor

Requires Only 1μF of Output Capacitance

External Switching Frequency Synchronization

Protection Features Including

Off ered in SOIC 8 Lead Package

Lead-free, Halogen-free, and RoHS/WEEE Compliant

HDTV, Set Top Boxes, Gaming Consoles

POL Applications

White Goods

Automotive (EMI sensitive console applications)



Enables Trace Inductors in PC Board Material

Excellent EMI Performance

Over-Current Protection

Output Short-Circuit Protection

Thermal Shutdown Protection

Inductor Technology

E n a b le

2.7 ~ 5.5 V

1 μF

P V IN

A V IN

E N

P G N D

A G N D

SC220

Synchronous Step-Down Regulator

Description

The SC220 is a 20MHz X-EMI™

lator optimized for powering low voltage rails from 2.7 to

5.5V input voltage. X-EMI™ inductor technology enables

inductors to be drawn directly on the PC board. This tech-

nology meets or exceeds the EMI performance of chip

inductors and eliminates the need for discrete inductors.

The SC220 uses a unique constant frequency, self-oscil-

lating control loop architecture to provide excellent

transient performance. Under light load condition, the

device operates in Power Save Mode (PSAVE) and main-

tains a typical quiescent current of 19μA. At moderate to

heavy loads, this part operates in PWM mode with a con-

stant switching frequency of 20MHz. This high switching

frequency off ers the advantages of using small and low

cost external components like a 1μF external capacitor

and a small 220nH inductor (including X-EMI

inductors).

The device provides adjustable output voltages down to

1.0V and an output current up to 650mA. An EN pin can

be used to synchronize to an external source and includes

de-glitching to reduce noise sensitivity.

The SC220 is available in SOIC 8 lead package.

Note 1: Purchase of SC220 includes royalty-free rights to use X-EMI

inductor technology with no additional cost.

V O U T

20MHz, 650mA, X-EMI

S W

F B

L , 2 2 0n H

u p to 6 5 0m A

O U T

= 1.8 V

1 μF

O U T

(1)

-enabled step-down regu-

™

-Enabled

SC220

PCB trace

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