RT7231/32/33/34
Absolute Maximum Ratings (Note 1)
z Supply Voltage, VIN, VCC --------------------------------------------------------------------------------------- −0.3V to 20V
z Switch Voltage, SW ----------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
< 10ns ---------------------------------------------------------------------------------------------------------------- −5V to 25V
z BOOT to SW -------------------------------------------------------------------------------------------------------- −0.3V to 6V
z EN ---------------------------------------------------------------------------------------------------------------------- −0.3V to 20V
z Other Pins------------------------------------------------------------------------------------------------------------ −0.3V to 6V
z Power Dissipation, PD @ TA = 25°C
TSSOP-14 (Exposed Pad) --------------------------------------------------------------------------------------- 2.50W
WDFN-10L 3x3 ------------------------------------------------------------------------------------------------------ 1.67W
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------------- 2.041W
z Package Thermal Resistance (Note 2)
TSSOP-14 (Exposed Pad), θJA --------------------------------------------------------------------------------- 40°C/W
WDFN-10L 3x3, θJA ------------------------------------------------------------------------------------------------ 60°C/W
WDFN-10L 3x3, θJC ------------------------------------------------------------------------------------------------ 7.5°C/W
SOP-8 (Exposed Pad), θJA --------------------------------------------------------------------------------------- 49°C/W
SOP-8 (Exposed Pad), θJC -------------------------------------------------------------------------------------- 15°C/W
z Junction Temperature Range------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------ 260°C
z Storage Temperature Range ------------------------------------------------------------------------------------- −65°C to 150°C
Recommended Operating Conditions (Note 3)
z Supply Voltage, VIN ----------------------------------------------------------------------------------------------- 4.5V to 18V
z Junction Temperature Range------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Supply Current
Symbol
Test Conditions
Min
Typ
Max Unit
Shutdown Current
Quiescent Current
Logic Threshold
ISHDN
IQ
VEN = 0V
--
--
1
1
10
μA
VEN = 5V, VFB = 0.8V
1.3
mA
Logic-High
Logic-Low
2
--
--
18
EN Input Voltage
V
V
--
0.4
VFB Voltage and Discharge Resistance
TA = 25°C
0.757 0.765 0.773
Feedback Threshold Voltage
VFB
TA = −40°C to 85°C
VFB = 0.8V
0.755
--
0.775
0.1
Feedback Input Current
VOUT Discharge Resistance
VREG5 Output
IFB
--
--
0.01
50
μA
RDIS
VEN = 0V, VS = 0.5V
100
Ω
VREG5 Output Voltage
VREG5
6V ≤ VIN ≤ 18V, 0 < IVREG5 < 5mA
4.8
5.1
5.4
V
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is a registered trademark of Richtek Technology Corporation.
DS7231/32/33/34-00 March 2013
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