SCT2613TVBR产品规格书pdf资源-CSDN文库

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SCT2613

Rev.1.1

Product Folder Links: SCT2613

芯洲科技

Silicon Content Technology

4.5V-60V Vin, 1A, High Efficiency Step-down DCDC Converter

FEATURES

 Wide Input Range: 4.5V-60V

 Continuous Output Current: 1A

 0.765V ±2.5% Feedback Reference Voltage

 Integrated 500mΩ High-Side

 Low Quiescent Current: 80uA

 Pulse Skipping Mode (PSM) in light load

 80ns Minimum On-time

 6ms Internal Soft-start Time

 Internal compensation

 Switching Frequency 480KHz

 Precision Enable Threshold for Programmable

Input Voltage Under-Voltage Lock Out Protection

(UVLO) Threshold and Hysteresis

 Low Dropout Mode Operation

 Over-voltage and Over-Temperature Protection

 Available in an TSOT23-6L Package

APPLICATIONS

 12-V, 24-V, 48-V Industry and Telecom Power

System

 Industrial Automation and Motor Control

 Vehicle Accessories

 Portable Handheld Instruments

 Portable Media Players

DESCRIPTION

The SCT2613 is 1A buck converter with wide input

voltage, ranging from 4.5V to 60V, which integrates an

500mΩ high-side MOSFET. The SCT2613, adopting

the peak current mode control, supports the Pulse

Skipping Modulation (PSM) with 80uA low quiescent

current which assists the converter on achieving high

efficiency at light load or standby condition.

The SCT2613 features fixed 480KHz switching

frequency, which minimizes the external off chip

passive components size and reduces the output

ripple. The SCT2613 allows power conversion from

high input voltage to low output voltage with a minimum

80ns on-time of high-side MOSFET and also supports

low dropout operation with a low voltage difference

from input to output.

The device offers fixed 6ms soft start to prevent inrush

current during the startup of output voltage ramping,

and compensation circuits are implemented internally

which allows the device to be used with minimized

external components.

The SCT2613 provides cycle-by-cycle current limit,

thermal shutdown protection, output over-voltage

protection and input voltage under-voltage protection.

The device is available in an TSOT23-6L package.

TYPICAL APPLICATION

BST

GND

VIN

OUT

OFF

4.5V-60V, Asyncronous Buck Converter

Efficiency, Vin=24V

100

0.001 0.01 0.1 1

Efficiency(%)

Output current(A)

24VIN 5VOUT

24VIN 12VOUT

SCT2613

Product Folder Links: SCT2613

REVISION HISTORY

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

Revision 1.0: Production

Revision 1.1: Update Figure 8, remove Zener diode

DEVICE ORDER INFORMATION

PART NUMBER

PACKAGE MARKING

PACKAGE DISCRIPTION

SCT2613TVB

2613

TSOT23-6L

1) For Tape & Reel, Add Suffix R (e.g. SCT2613TVBR)

ABSOLUTE MAXIMUM RATINGS

Over operating free-air temperature unless otherwise noted

(1)

PIN CONFIGURATION

DESCRIPTION

MIN

MAX

UNIT

3 4

BST

GND

VIN

Figure 1. 6-Lead Plastic TSOT23-6L

VIN, EN

-0.3

BST

-0.3

-1

BST-SW

-0.3

Operating junction temperature TJ

(2)

-40

150

°C

Storage temperature TSTG

-65

150

°C

(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

BST

Power supply bias for high-side power MOSFET gate driver. Connect a 0.1uF capacitor

from BOOT pin to SW pin. Bootstrap capacitor is charged when SW voltage is low.

GND

Ground

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

0.765V typically.

Enable pin to the regulator with internal pull-up current source. Pull below 1.13V to

disable the converter. Float or connect to VIN to enable the converter. The tap of resistor

divider from VIN to GND connecting EN pin can adjust the input voltage lockout

threshold.

VIN

Input supply voltage. Connect a local bypass capacitor from VIN pin to GND pin

Regulator switching output. Connect SW to an external power inductor

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