RT5789A/B
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage, VIN -----------------------------------------------------------------------------------------
−0.3V
to 7V
LX Pin Switch Voltage ----------------------------------------------------------------------------------------------
−0.3V
to (V
IN
+ 0.3V)
<10ns ------------------------------------------------------------------------------------------------------------------
−5V
to 8.5V
Other Pins -------------------------------------------------------------------------------------------------------------
−0.3V
to (V
IN
+ 0.3V)
Power Dissipation, P
D
@ T
A
= 25°C
TSOT-23-8 (FC) ------------------------------------------------------------------------------------------------------ 1.46W
UDFN-8L 2.5x2 (FC) ------------------------------------------------------------------------------------------------ 1.51W
Package Thermal Resistance (Note 2)
TSOT-23-8 (FC),
θ
JA
------------------------------------------------------------------------------------------------- 68.2°C/W
TSOT-23-8 (FC),
θ
JC
------------------------------------------------------------------------------------------------ 17.1°C/W
UDFN-8L 2.5x2 (FC),
θ
JA
------------------------------------------------------------------------------------------- 65.9°C/W
UDFN-8L 2.5x2 (FC),
θ
JC
------------------------------------------------------------------------------------------ 7.8°C/W
Junction Temperature ----------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------- 260°C
Storage Temperature Range --------------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions
(Note 4)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------- 2.5V to 6V
Junction Temperature Range --------------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
(V
IN
= 5V, T
A
= 25°C, unless otherwise specified)
Parameter
Supply Voltage
Input Operating Voltage
Under-Voltage Lockout
Threshold
Under-Voltage Lockout
Threshold Hysteresis
Shutdown Current
Quiescent Current
Enable Voltage
Enable Threshold Voltage
Enable Input Current
Feedback Voltage
Feedback Input Current
Symbol
V
IN
V
UVLO
∆V
UVLO
I
SHDN
I
Q
V
EN
= 0V
RT5789A
RT5789B
Test Conditions
Min
2.5
2.15
--
--
--
--
1.2
--
--
--
--
Typ
--
2.3
260
0
35
600
--
--
1.5
0
10
Max
6
2.45
--
1
50
--
--
0.4
--
--
--
Unit
V
mV
A
A
V
ENH
V
ENL
I
IH
V
EN
rising
V
EN
falling
V
EN
= 2V
V
EN
= 0V
V
FB
= 0.6V
V
A
I
FB
nA
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS5789A/B-02 March 2018
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
