RT7271A
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------
−0.3V
to 20V
LX Pin Switch Voltage, V
LX
---------------------------------------------------------------------------------
−0.3V
to (VIN + 0.3V)
Boot Voltage, V
BOOT
----------------------------------------------------------------------------------------- (V
LX
−
0.3V) to (V
LX
+ 6V)
EN Voltage, V
EN
----------------------------------------------------------------------------------------------
−0.3V
to 3.6V
Other Pins ------------------------------------------------------------------------------------------------------
−0.3V
to 6V
Power Dissipation, P
D
@ T
A
= 25°C
WL-CSP-12B 1.65x1.95 (BSC) --------------------------------------------------------------------------- 1.88W
Package Thermal Resistance (Note 2)
WL-CSP-12B 1.65x1.95 (BSC),
θ
JA
--------------------------------------------------------------------- 53°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 ---------------------------------------------------------------------------------- 4.5V to 17V
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
Shutdown Current
VIN UVLO Threshold
VIN UVLO Hysteresis
Enable Threshold
Enable Threshold
Quiescent Current
Feedback Reference Voltage
Switch
On-Resistance
Error Amplifier
transconductance
Error Amp Source/Sink
COMP to Current Sense
transconductance
High-Side
Low-Side
Symbol
I
SHDN
V
IN_TH
V
IN_HYS
V
ENR
V
ENF
I
Q
V
REF
R
DS(ON)_H
R
DS(ON)_L
gm
Rising
Falling
Test Conditions
V
EN
= 0V
V
IN
Rising
Min
--
--
--
--
1.15
--
0.594
--
--
Typ
4
4
250
1.4
1.25
0.9
0.6
45
25
1600
110
16
12
100
Max
15
4.5
--
1.5
--
1.2
0.606
--
--
--
--
--
--
--
Unit
μA
V
mV
V
V
mA
V
mΩ
mΩ
μA/V
μA
A/V
A
ns
V
FB
= 0.61V
−2μ
< I
COMP
< 2μ,V
COMP
= 1V
V
COMP
= 1V, 100mV Input
Overdrive
--
--
--
8
--
High side Switch Peak Current
I
LIM_H
Limit
Minimum On-Time
T
ON(MIN)
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7271A-00 February 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
