RT7235/36/39/40
Absolute Maximum Ratings
(Note 1)
Supply Voltage, VIN, VCC ---------------------------------------------------------------------------------------
−0.3V
to 20V
Switch Voltage, SW -----------------------------------------------------------------------------------------------
−0.3V
to (V
IN
+ 0.3V)
< 10ns ----------------------------------------------------------------------------------------------------------------
−5V
to 25V
BOOT to SW --------------------------------------------------------------------------------------------------------
−0.3V
to 6V
EN ----------------------------------------------------------------------------------------------------------------------
−0.3V
to 20V
Other Pins ------------------------------------------------------------------------------------------------------------
−0.3V
to 6V
Power Dissipation, P
D
@ T
A
= 25°C
TSSOP-14 (Exposed Pad) --------------------------------------------------------------------------------------- 2.50W
WDFN-10L 3x3 ------------------------------------------------------------------------------------------------------ 1.67W
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------------- 2.041W
Package Thermal Resistance (Note 2)
TSSOP-14 (Exposed Pad),
θ
JA
--------------------------------------------------------------------------------- 40°C/W
WDFN-10L 3x3,
θ
JA
------------------------------------------------------------------------------------------------ 60°C/W
WDFN-10L 3x3,
θ
JC
------------------------------------------------------------------------------------------------ 7.5°C/W
SOP-8 (Exposed Pad),
θ
JA
--------------------------------------------------------------------------------------- 49°C/W
SOP-8 (Exposed Pad),
θ
JC
-------------------------------------------------------------------------------------- 15°C/W
Junction Temperature Range ------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------ 260°C
Storage Temperature Range -------------------------------------------------------------------------------------
−65°C
to 150°C
Recommended Operating Conditions
(Note 3)
Supply Voltage, VIN ----------------------------------------------------------------------------------------------- 4.5V to 18V
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
Logic Threshold
EN Input Voltage
Logic-High
Logic-Low
Symbol
I
SHDN
I
Q
V
EN
= 0V
Test Conditions
Min
--
--
2
--
Typ
1
1
--
--
Max
10
1.3
18
0.4
Unit
μA
mA
V
EN
= 5V, V
FB
= 0.8V
V
V
FB
Voltage and Discharge Resistance
Feedback Threshold Voltage
Feedback Input Current
VOUT Discharge Resistance
V
REG5
Output
V
REG5
Output Voltage
V
REG5
6V
≤
V
IN
≤
18V, 0 < I
VREG5
<
5mA
4.8
5.1
5.4
V
V
FB
I
FB
R
DIS
T
A
= 25°C
T
A
=
−40°C
to 85°C
V
FB
= 0.8V
V
EN
= 0V, V
S
= 0.5V
0.757 0.765 0.773
0.755
--
--
--
0.01
50
0.775
0.1
100
V
μA
Ω
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7235/36/39/40-00
March 2013
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
