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RT7239 Datasheet(PDF) 5 Page - Richtek Technology Corporation

Part # RT7239
Description  5A, 18V, 650kHz, ACOTTM Synchronous Step-Down Converter
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT7239 Datasheet(HTML) 5 Page - Richtek Technology Corporation

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RT7235/36/39/40
5
DS7235/36/39/40-00
March 2013
www.richtek.com
©
Copyright
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
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
Absolute Maximum Ratings
(Note 1)
Supply Voltage, VIN, VCC ---------------------------------------------------------------------------------------
−0.3V to 20V
Switch Voltage, SW -----------------------------------------------------------------------------------------------
−0.3V to (VIN + 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, PD @ TA = 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),
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
Junction Temperature Range ------------------------------------------------------------------------------------- 150
°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------ 260
°C
Storage Temperature Range -------------------------------------------------------------------------------------
−65°C to 150°C
(VIN = 12V, TA = 25
°C, unless otherwise specified)
Electrical Characteristics
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current
Shutdown Current
ISHDN
VEN = 0V
--
1
10
μA
Quiescent Current
IQ
VEN = 5V, VFB = 0.8V
--
1
1.3
mA
Logic Threshold
Logic-High
2
--
18
EN Input Voltage
Logic-Low
--
--
0.4
V
VFB Voltage and Discharge Resistance
TA = 25°C
0.757
0.765
0.773
Feedback Threshold Voltage
VFB
TA = −40°C to 85°C
0.755
--
0.775
V
Feedback Input Current
IFB
VFB = 0.8V
--
0.01
0.1
μA
VOUT Discharge Resistance
RDIS
VEN = 0V, VS = 0.5V
--
50
100
Ω
VREG5 Output
VREG5 Output Voltage
VREG5
6V
≤ VIN ≤ 18V, 0 < IVREG5 < 5mA
4.8
5.1
5.4
V


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