SCT2A25
Rev.1.0
For more information www.silicontent.com © 2021 Silicon Content Technology Co., Ltd. All Rights Reserved 1
Product Folder Links: SCT2A25
芯洲科技
Silicon Content Technology
5.5V-100V Vin, 4A Peak Current Limit, High Efficiency Asynchronous Step-
down DCDC Converter
FEATURES
Wide Input Range: 5.5V-100V
Maximum Output Voltage: 30V
2A Continuous Output Current
4A Peak Current Limit
Integrated 500mΩ High-Side Power MOSFET
135uA Quiescent Current
1.2V ±1% Feedback Reference Voltage
4ms Internal Soft-start Time
Fixed Switching Frequency at 300KHz
COT Control Mode with Integrated Loop
Compensation
Precision Enable Threshold for Programmable
Input Voltage Under-voltage Lock Out Protection
(UVLO) Threshold and Hysteresis
Cycle-by-Cycle Current Limiting
Over-Voltage Protection
Over-Temperature Protection
Available in an ESOP-8 Package
APPLICATIONS
GPS Tracker
E-bike, Scooter
Moto Drives, Drones
48V Industry Power Bus System
DESCRIPTION
The SCT2A25 is an asynchronous buck converter with
wide input voltage ranging from 5.5V to 100V which
accommodates a variety of step-down applications,
making it ideal for automotive, industry, and lighting
applications. The SCT2A25 integrates an 500mΩ high-
side MOSFET and has 4A peak output current limit to
support high peak current application in GPS tracker
with 4G Module.
The SCT2A25, adopting the constant-on time (COT)
mode control with integrated loop compensation
greatly simplifies the converter off-chip configuration.
The SCT2A25 features Pulse Frequency Modulation
(PFM) mode at light load with typical 140uA low
quiescent current, which enables the converter to
achieve the high-power efficiency during light-load or
no-load conditions.
The SCT2A25 offers cycle-by-cycle current limit,
thermal shutdown protection, output over-voltage
protection and input voltage under-voltage protection.
The device is available in an 8-pin thermally enhanced
SOP-8 package.
TYPICAL APPLICATION
FB
NC
VIN
BST
GND
EN
TM
SW
SCT2A25
V
OUT
V
IN
=5.5~100V
Efficiency, Vout=12V
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1
Efficiency(%)
Iout(A)
24VIN 12VOUT
36VIN 12VOUT
48VIN 12VOUT
60VIN 12VOUT
72VIN 12VOUT
SCT2A25
2 For more information www.silicontent.com © 2021 Silicon Content Technology Co., Ltd. All Rights Reserved
Product Folder Links: SCT2A25
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Revision 1.0: Released to market
DEVICE ORDER INFORMATION
PACKAGE MARKING
PACKAGE DISCRIPTION
2A25
8-Lead Plastic ESOP
1）For Tape & Reel, Add Suffix R (e.g. SCT2A25STER).
ABSOLUTE MAXIMUM RATINGS
Over operating free-air temperature unless otherwise noted
(1)
PIN CONFIGURATION
DESCRIPTION
MIN
MAX
UNIT
TM
GND
EN
1
2
3
4 5
6
7
8
FB
NC
VIN
BST
SW
Thermal
PAD
9
Figure 1. 8-Lead Plastic E-SOP
VIN
-0.3
110
V
BST
-0.3
116
V
SW
-1
110
V
BST-SW
-0.3
6
V
EN, FB, TM
-0.3
6
V
Operating junction temperature T
J
(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
FB
1
Inverting input of the comparator. The tap of external feedback resistor divider from the
output to GND sets the output voltage. The device regulates FB voltage to the internal
reference value of 1.2V typical.
NC
2
Not Connection.
VIN
3
Input supply voltage. Connect a local bypass capacitor from VIN pin to GND pin. Path
from VIN pin to high frequency bypass capacitor and GND must be as short as possible.
BST
4
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 low-side power
MOSFET is on or SW voltage is low.
SW
5
Regulator switching output. Connect SW to an external power inductor
TM
6
Test mode pin for factory use only. Connect TM to EN pin, ground or leave floating.
EN
7
Enable pin to the regulator with internal pull-up current source. Pull below 1.23V to
disable the converter. Floating to enable the converter.
GND
8
Ground
Thermal Pad
9
Heat dissipation path of die. Electrically connection to GND pin. Must be connected to
ground plane on PCB for proper operation and optimized thermal performance.