RT5789A/B
Parameter
Feedback Voltage
Current Limit
High-Side Switch Peak
Current Limit
Low-Side Switch Valley
Current Limit
Switching
Switching Frequency
Minimum Off-Time
Internal MOSFET
High-Side On-Resistance
Low-Side On-Resistance
Soft-Start
Fixed Soft-Start Time
V
OUT
Output Discharge Resistor
Power Good
Power-Good High Threshold
Power-Good Low Threshold
Power-Good Low Hysteresis
Power Good Delay Time
Power Good Sink Current
Capability
Power Good Internal Pull Up
Resistance
Over-Temperature Protection
Thermal Shutdown
Thermal Shutdown
Hysteresis
T
SD
∆T
SD
--
--
150
30
--
--
C
I
PGOOD
sinks 1mA
V
TH_PGLH
V
TH_PGHL
V
FB
rising. PGOOD goes high
V
FB
rising. PGOOD goes low
--
--
--
--
--
--
--
95
5
110
5
15
--
550
--
--
--
--
--
0.4
--
%V
FB
%V
FB
%V
FB
%V
FB
s
V
k
Power-Good High Hysteresis
V
TH_PGLH
V
FB
falling. PGOOD goes low
V
TH_PGHL
V
FB
falling. PGOOD goes high
(Note 5)
--
1
--
k
t
SS
1
1.5
--
ms
R
DS(ON)_H
R
DS(ON)_L
--
--
18
16
--
--
m
f
SW
t
OFF_MIN
V
OUT
= 1.2V
1300
--
1500
60
1700
--
kHz
ns
I
LIM_H
I
LIM_L
--
6
9.7
7.5
--
A
9.1
Symbol
V
FB
Test Conditions
Min
0.591
Typ
0.6
Max
0.609
Unit
V
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 in the natural convection at T
A
= 25°C on a four-layer Richtek Evaluation Board for TSOT-23-8 (FC).
θ
JA
is measured in the natural convection at T
A
= 25°C on a four-layer Richtek Evaluation Board for UDFN-8L 2.5x2
(FC).
Note 3.
Devices are ESD sensitive. Handling precaution is recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Note 5.
Guarantee by design.
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS5789A/B-02 March 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
