RT6238A Datasheet, PDF (9/23 Pages) Richtek Technology Corporation – ACOT Synchronous Step-Down Converter

RT6238A/B
Parameter
Symbol
Test Conditions
RDS(ON)
Switch On-Resistance
RDS(ON)_H
RDS(ON)_L
VBOOT  VSW = 5V
Current Limit
Valley Current Limit
ILIM
Thermal Shutdown
Thermal Shutdown Threshold TSD
Thermal Shutdown Hysteresis TSD
On-Time Timer Control
On-Time
Minimum On-Time
Minimum Off-Time
tON
tON(MIN)
tOFF(MIN)
VIN = 12V, VOUT = 1.05V
Soft-Start
SS Charge Current
VSS = 0V
UVLO
UVLO Threshold
Wake Up VPVCC
Hysteresis
Power Good
PGOOD Threshold
PGOOD Sink Current
FB Rising
FB Falling
PGOOD = 0.1V
Output Under-Voltage and Over-Voltage Protection
OVP Trip Threshold
OVP Detect
OVP Propagation Delay
UVP Trip Threshold
UVP Propagation Delay
UVP Detect
Hysteresis
UVP Enable Delay
Relative to Soft-Start Time
Switching Frequency
fSW
Min Typ Max Unit
--
35
--
--
14
--
m
9.5 11 12.5 A
-- 150 --
--
20
--
C
-- 175 --
ns
--
60
--
ns
-- 200 --
ns
5
6
7
A
4
4.2 4.4
-- 0.5 --
V
85
90
95
%
--
80
--
%
10 20
--
mA
115 120 125 %
--
10
--
s
55 60 65
%
--
17
--
-- 270 --
s
--
tSS
x 1.7
--
--
400 500 600 kHz
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a highly thermal conductive four-layer test board. θJC is measured at the exposed pad
of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS6238A/B-08 July 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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