RT7235/36/39/40
Parameter
Line Regulation
Symbol
Test Conditions
6V VIN 18V, IVREG5 = 5mA
0 IVREG5 5mA
Min
--
Typ
--
Max
20
Unit
mV
mV
mA
kHz
Load Regulation
Output Current
Oscillation Frequency
RDS(ON)
--
--
100
--
IVREG5
fOSC
VIN = 6V, VREG5 = 4V, TA = 25C
--
70
650
540
760
RDS(ON)_H
RDS(ON)_L
High-Side
Low-Side
(VBOOT VSW) = 5.5V
--
--
120
35
--
--
Switch On
Resistance
m
A
Current Limit
Current Limit
ILIM
5.9
6.85
7.8
Thermal Shutdown
Thermal Shutdown Threshold TSD
Thermal Shutdown Hysteresis TSD
On-Time Timer Control
Shutdown Temperature
--
--
150
20
--
--
C
On-Time
tON
VIN = 12V, VOUT = 1.05V
Note 5
--
--
--
135
55
--
ns
ns
ns
Minimum On-Time
Minimum Off-Time
Soft-Start
tON(MIN)
tOFF(MIN)
80
VFB = 0.7V
260
310
SS Charge Current
SS Discharge Current
UVLO
VSS = 0V
--
6
--
--
A
VSS = 0.5V
0.1
0.2
mA
UVLO Threshold
Hysteresis
Wake Up VREG5
3.6
3.85
0.35
4.1
V
0.16
0.47
Power Good
85
--
90
85
5
95
--
V
FB Rising
%
PGOOD Threshold
VFB Falling
2.5
--
mA
PGOOD Sink Current
PGOOD = 0.5V
Output Under Voltage and Over Voltage Protection
115
--
120
5
125
--
%
OVP Trip Threshold
OVP Prop Delay
UVP Trip Threshold
UVP Hysteresis
OVP Detect
s
65
--
70
10
250
75
--
%
--
--
UVP Prop Delay
s
tSS
x 1.7
--
--
ms
UVP Enable Delay
tUVPEN
Relative to Soft-Start Time
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6
DS7235/36/39/40-08 January 2017
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
