SCT2331

Product Folder Links: SCT2331

SILICON CONTENT

TECHNOLOGY

3.8V-32V Vin, 3A Synchronous Step-down DCDC Converter with EMI Reduction

FEATURES

 EMI Reduction with Switching Node Ringing-free

 400kHz Switching Frequency

 Force Pulse Width Modulation (FPWM) Mode

 3.8V-32V Wide Input Voltage Range

 Up to 3A Continuous Output Load Current

 0.8V ±1% Feedback Reference Voltage

 Fully Integrated 80mΩ R

dson

High Side MOSFET

and 42mΩ R

dson

Low Side MOSFET

 1uA Shut-down Current

 80ns Minimum On-time

 Precision Enable Threshold for Programmable

UVLO Threshold and Hysteresis

 Low Dropout Mode Operation

 4ms Built-in Soft Start Time

 Output Over Voltage Protection

 Thermal Shutdown Protection at 160°C

 Available in TSOT23-6L Package

APPLICATIONS

 White Goods, Home Appliance

 Surveillance

 Audio, WiFi Speaker

 Printer, Charging Station

 DTV, STB, Monitor/LCD Display

DESCRIPTION

The SCT2331 is a 3A synchronous buck converter with

up to 32V wide input voltage range, which fully

integrates an 80mΩ high-side MOSFET and a 42mΩ

low-side MOSFET to provide high efficiency step-down

DCDC conversion. The SCT2331 adopts peak current

mode control with the integrated compensation

network, which makes SCT2331 easily to be used by

minimizing the off-chip component count. The

SCT2331 supports Force Pulse Width Modulation

(FPWM) Mode to achieve the small output ripple at light

load condition.

The SCT2331 is an Electromagnetic Interference (EMI)

friendly buck converter with implementing optimized

design for EMI reduction. The converter has proprietary

designed gate driver scheme to resist switching node

ringing without sacrificing MOSFET turn-on and turn-off

time, which erases high frequency radiation EMI noise

caused by the MOSFETs hard switching.

The SCT2331 offers output over-voltage protection,

cycle-by-cycle peak current limit, and thermal

shutdown protection. The device is available in a low-

profile TSOT23-6 package.

TYPICAL APPLICATION

VIN GND

BST

OFF

VIN

VOUT

100

1 10 100 1,000 10,000

Efficiency (%)

Output Current (mA)

12VIN,3.3VOUT

12VIN, 5VOUT

24VIN, 3.3VOUT

24VIN, 5VOUT

SCT2331

Product Folder Links: SCT2331

REVISION HISTORY

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Revision 1.0: Release to Market

DEVICE ORDER INFORMATION

PART NUMBER

PACKAGE MARKING

PACKAGE DISCRIPTION

SCT2331TVBR

2331

TSOT23-6L

For Tape & Reel, Add Suffix R (e.g. SCT2331TVBR)

ABSOLUTE MAXIMUM RATINGS

Over operating free-air temperature unless otherwise noted

(1)

PIN CONFIGURATION

DESCRIPTION

MIN

MAX

UNIT

3 4

VIN

GND

BST

Top View: TSOT23-6L, Plastic

BST

-0.3

VIN, SW, EN

-0.3

VS, FB

-0.3

5.5

Operating junction temperature

(2)

-40

125

Storage temperature T

STG

-65

150

(1) Stresses beyond those listed under Absolute Maximum Rating may cause device permanent damage. The device is not guaranteed to

function outside of its Recommended Operation Conditions.

(2) The IC includes over temperature protection to protect the device during overload conditions. Junction temperature will exceed 150°C

when over temperature protection is active. Continuous operation above the specified maximum operating junction temperature will

reduce lifetime.

PIN FUNCTIONS

NAME

NO.

PIN FUNCTION

Buck converter output feedback sensing voltage. Connect a resistor divider from

VOUT to FB to set up output voltage. The device regulates FB to the internal

reference of 0.8V typical.

Enable logic input. Floating the pin enables the device. This pin supports high voltage

input up to VIN supply to be connected VIN directly to enable the device

automatically. The device has precision enable thresholds 1.18V rising / 1.1V falling

for programmable UVLO threshold and hysteresis.

VIN

Power supply input. Must be locally bypassed.

GND

Power ground. Must be soldered directly to ground plane.

Switching node of the buck converter.