RT7291A/B
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------
−0.3V
to 27V
Switch Voltage, SW -----------------------------------------------------------------------------------------
−0.3V
to (V
IN
+ 0.3V)
<30ns -----------------------------------------------------------------------------------------------------------
−5V
to 28V
BOOT Switch Voltage --------------------------------------------------------------------------------------- (V
SW
−
0.3V) to (V
SW
+ 6V)
EN, ENLDO Pin Voltages ----------------------------------------------------------------------------------
−0.3V
to 27V
Other I/O Pin Voltages --------------------------------------------------------------------------------------
−0.3V
to 6V
Power Dissipation, P
D
@ T
A
= 25°C
UQFN-16L 3x3 (FC) ------------------------------------------------------------------------------------------ 1.4W
Package Thermal Resistance (Note 2)
UQFN-16L 3x3 (FC),
θ
JA
------------------------------------------------------------------------------------ 70°C/W
UQFN-16L 3x3 (FC),
θ
JC
------------------------------------------------------------------------------------ 15°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------ 260°C
Junction Temperature ---------------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) --------------------------------------------------------------------------------- 2kV
MM (Machine Model) ---------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
(Note 4)
Supply Input Voltage, VIN ---------------------------------------------------------------------------------- 5V to 23V
Junction Temperature Range -------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
(V
IN
= 12V, T
A
= 25°C, unless otherwise specified)
Parameter
Supply Current
Shutdown Current
Quiescent Current
Standby Current
Switch On-Resistance
Switch On-Resistance
Current Limit
Current Limit
Switching Frequency
Minimum Off-Time
Protections
OVP Trip Threshold
OVP Propagation Delay
Symbol
Test Conditions
V
EN
= V
ENLDO
= 0V
V
EN
= 2V, V
ENLDO
= 2V, no switching
V
EN
= 0V, V
ENLDO
= 2V, LDO load
current = 0A
Min
--
--
--
Typ
2.5
100
35
Max
5
130
45
Unit
A
A
A
R
DS(ON)_H
V
BOOT
– V
SW
= 5V
R
DS(ON)_L
I
OC
f
SW
t
OFF_MIN
V
OVP
T
OVPDLY
With respect to output voltage
Valley current of low-side switch
--
--
7.6
450
--
115
--
31
20
--
500
200
120
5
--
--
11.4
550
--
125
--
m
A
kHz
ns
%
s
Switching Frequency and Minimum Off Timer
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7291A/B-03 January 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
