SCT2230A
Rev. 1.4
For more information www.silicontent.com © 2019 Silicon Content Technology Co., Ltd. All Rights Reserved 1
芯洲科技
Silicon Content Technology
17V Vin, 3A Synchronous Step-down DCDC Converter
FEATURES
Wide Input Voltage: 4.2V-17V
3A Continuous Output Current with Integrated
70mΩ/42mΩFETs
Wide Output Voltage Range:0.8V-7V
Quiescent Current 150uA
Cycle-by-Cycle Current Limiting
Internal 2ms Soft-Start Limits the inrush current
Fixed 750kHz Switching Frequency
Input Under-Voltage Lockout
Power save mode at light load
Over-Temperature Protection
Available in a SOT563 Package
APPLICATIONS
Flat Panel Digital TV and Monitors
Surveillance
Set Top Boxes
Networking Systems
Consumer Electronics
General Purpose
DESCRIPTION
The SCT2230A is a fully integrated high efficiency
synchronous step-down DCDC converter capable of
delivering 3A current. The devices operate over a
wide input voltage range from 4.2V to 17V and fully
integrate high-side power MOSFETs and
synchronous MOSFETs with very low Rdson to
minimize the conduction loss.
With 750 kHz switching frequency, low output voltage
ripple, small external inductor and capacitor size are
achieved. SCT2230A adopts adaptive constant ON-
time control architecture to achieve fast load transient
responses for step-down applications.
The SCT2230A operates in power saving mode,
which maintains high efficiency during light load
operation.
It includes full protection features, such as over
current protection, output under-voltage protection,
input under-voltage lockout, and thermal shutdown.
The SCT2230A requires a minimal number of
external components and is available in a space-
saving SOT563 package.
TYPICAL APPLICATION
VIN
EN
GND
FB
BST
SW
VIN VOUT
SCT223 0A
R1
R2
C1
C2
C3
L1
1
5
3
2
4
6
Power Efficiency
Efficiency, Vin=12V
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000
Efficiency (%)
Output Current (mA)
SCT2230A
2 For more information www.silicontent.com © 2019 Silicon Content Technology Co., Ltd. All Rights Reserved
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Rev 1.0: Released to Market.
Rev 1.1: Update Rdson data and VFB accuracy
Rev 1.2: Add Vsw ABS max rating for pulse， Correct a typo(I
EN_HYS
to 5.5uA) in EC table.
Rev 1.3: Update EN description in Page 3 and Page 8.
Rev 1.4: Update Figure 15.
DEVICE ORDER INFORMATION
PART NUMBER
PACKAGE MARKING
SCT2230ATVA
2230
* (1) FOR TAPE & REEL, ADD SUFFIX R (E.G. SCT2230ATVAR).
ABSOLUTE MAXIMUM RATING
Over operating free-air temperature unless otherwise noted
(1)
SYMBOL
RATING
UNIT
PIN CONFIGURATION
SOT563 Top View
(1.6mm x 1.6mm)
V
IN
-0.3 to 20
V
V
SW
-1 to 20
V
V
SW
（<10ns）
-2.5 to 22
V
V
BST
V
SW
-0.3 to V
SW
+6
V
V
FB
-0.3 to 6.5
V
V
EN
-0.3 to 6.5
V
T
J
(2)
-40 to 125
ºC
T
STG
-65 to 150
ºC
(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