Step-Down Regulator. SC221 Datasheet

SC221 Regulator. Datasheet pdf. Equivalent

Part SC221
Description Synchronous Step-Down Regulator
Feature SC221 x POWER MANAGEMENT 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator Features D.
Manufacture Semtech
Datasheet
Download SC221 Datasheet

SC221 x POWER MANAGEMENT 20MHz, 650mA, X-EMI™-Enabled Sync SC221 Datasheet
http://www.Datasheet4U.com SC22101 Datasheet
Recommendation Recommendation Datasheet SC221 Datasheet




SC221
SC221 x
POWER MANAGEMENT
20MHz, 650mA, X-EMI-Enabled
Synchronous Step-Down Regulator
Features
Description
„„ Patented X-EMITM Inductor Technology
„„ Enables Trace Inductors in PC Board Material
„„ Excellent EMI Performance
„„ Efficiency up to 90%
„„ 17.5µA Quiescent Current under Very Light Loads
„„ 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 Efficiency 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
„„ Over-Current Protection
„„ Output Short-Circuit Protection
„„ Thermal Shutdown Protection
„„ Offered in MLPD-UT 8 Lead Packages
„„ Lead-free, Halogen-free, and RoHS/WEEE Compliant
Applications
„„ HDTV, Set Top Boxes, Gaming Consoles
„„ POL Applications
„„ White Goods
The SC221 is a 20MHz X-EMI™(1)-enabled step-down regu-
lator optimized for power 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 SC221 uses a unique constant frequency, self-oscil-
lating control loop architecture to provide excellent
transient performance. Under light loads, the device
operates in Power Save mode(PSAVE) maintaining a
typical quiescent current of 17.5µA. At moderate to heavy
loads, this part operates in PWM mode with a constant
switching frequency of 20MHz. This high switching fre-
quency offers the advantages of using small and low cost
external components like a 1µF external capacitor and a
small 220nH inductor (including X-EMITM PCB trace
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 SC221 is available in MLPD-UT 8 Lead package.
Note 1: Purchase of SC221 includes royalty-free right to use X-EMITM inductor technology with no addi-
tional cost.
Typical Application Circuit
VIN
2.7~5.5V
CIN
1 µF
PVIN
SW
AVIN
VOUT
SC221
L, 220nH
VOUT=1.8V
up to 650mA
R1
COUT
1 µF
Enable
EN
PGND
AGND
FB
R2
Revision 2.0
© 2016 Semtech Corporation
1



SC221
Pin Configuration
SW
PVIN
VOUT
FB
PGND
AGND
AVIN
EN
MLPD-UT 8 Lead, θJA = 38 °C/W
SC221 x
Ordering Information
Device
SC221ULTRT (1)(2)
SC221EVB
Package
MLPD-UT 8 Lead
Evaluation Board
Notes:
(1) Available in tape and reel only. A reel contains 3000 devices.
(2) Device is lead-free, halogen-free, and RoHS/WEEE compliant.
Marking Information
2





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)