RT7237 Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT7237 Datasheet PDF : 15 Pages
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RT7237C
Absolute Maximum Ratings (Note 1)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------- −0.3V to 20V
Switch Voltage, SW ------------------------------------------------------------------------------------------------ −0.3V to (VIN + 0.3V)
VBOOT − VSW ---------------------------------------------------------------------------------------------------------- −0.3V to 6V
Other Pins Voltage ------------------------------------------------------------------------------------------------- −0.3V to 20V
Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) --------------------------------------------------------------------------------------------- 1.333W
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θJA ---------------------------------------------------------------------------------------- 75°C/W
SOP-8 (Exposed Pad), θJC --------------------------------------------------------------------------------------- 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
Recommended Operating Conditions (Note 4)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------- 4.5V to 18V
Junction Temperature Range -------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Shutdown Supply Current
VEN = 0V
--
0.5
3
A
Supply Current
Reference Voltage
Error Amplifier
Transconductance
VREF
GEA
VEN = 3V, VFB = 0.9V
4.5V VIN 18V
IC = ±10A
--
0.8 1.2 mA
0.788 0.8 0.812 V
-- 940 -- A/V
High Side Switch
On-Resistance
Low Side Switch
On-Resistance
High Side Switch Leakage
Current
RDS(ON)1
RDS(ON)2
VEN = 0V, VSW = 0V
-- 150 -- m
-- 130 -- m
--
0
10 A
Upper Switch Current Limit
COMP to Current Sense
Transconductance
GCS
Min. Duty Cycle, VBOOT VSW = 4.8V --
4
--
A
--
3.7
-- A/V
Oscillation Frequency
Short Circuit Oscillation
Frequency
fOSC1
fOSC2
VFB = 0V
-- 800 -- kHz
-- 270 -- kHz
Maximum Duty Cycle
DMAX
VFB = 0.7V
--
84
--
%
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is a registered trademark of Richtek Technology Corporation.
DS7237C-05 February 2015
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