RT6238A/B
Parameter
R
DS(ON)
Switch On-Resistance
Current Limit
Valley Current Limit
Thermal Shutdown
Thermal Shutdown Threshold
On-Time Timer Control
On-Time
Minimum On-Time
Minimum Off-Time
Soft-Start
SS Charge Current
UVLO
UVLO Threshold
Power Good
PGOOD Threshold
PGOOD Sink Current
OVP Trip Threshold
OVP Propagation Delay
UVP Trip Threshold
UVP Propagation Delay
UVP Enable Delay
Switching Frequency
f
SW
Relative to Soft-Start Time
UVP Detect
Hysteresis
FB Rising
FB Falling
PGOOD = 0.1V
OVP Detect
85
--
10
115
--
55
--
--
--
400
90
80
20
120
10
60
17
270
t
SS
x 1.7
500
95
--
--
125
--
65
--
--
--
600
%
%
mA
%
s
%
s
--
kHz
Wake Up V
PVCC
Hysteresis
4
--
4.2
0.5
4.4
--
V
V
SS
= 0V
5
6
7
A
t
ON
t
ON(MIN)
t
OFF(MIN)
V
IN
= 12V, V
OUT
= 1.05V
--
--
--
175
60
200
--
--
--
ns
ns
ns
T
SD
--
--
150
20
--
--
Thermal Shutdown Hysteresis
T
SD
C
I
LIM
9.5
11
12.5
A
R
DS(ON)_H
R
DS(ON)_L
V
BOOT
V
SW
= 5V
--
--
35
14
--
--
m
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Under-Voltage and Over-Voltage Protection
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.
θ
JA
is measured at T
A
= 25°C on a highly thermal conductive four-layer test board.
θ
JC
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.
is a registered trademark of Richtek Technology Corporation.
DS6238A/B-08 July 2017
www.richtek.com
9
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
