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EMK325BJ476MM Datasheet(PDF) 3 Page - Richtek Technology Corporation

Part # EMK325BJ476MM
Description  3A, 24V, 1.2MHz Step-Down Converter
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

EMK325BJ476MM Datasheet(HTML) 3 Page - Richtek Technology Corporation

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RT8272
3
DS8272-02 March 2011
www.richtek.com
Function Block Diagram
Absolute Maximum Ratings (Note 1)
Supply Voltage, VIN -----------------------------------------------------------------------------------------
−0.3V to 26V
Switching Voltage, SW -------------------------------------------------------------------------------------
−0.3V to (VIN + 0.3V)
BOOT Voltage ------------------------------------------------------------------------------------------------ (VSW
− 0.3V) to (VSW + 6V)
All Other Pins Voltage --------------------------------------------------------------------------------------
−0.3V to 6V
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
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 Mode) --------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ---------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
(Note 4)
Supply Voltage, VIN ----------------------------------------------------------------------------------------- 4.75V to 24V
Enable Voltage, VEN ----------------------------------------------------------------------------------------- 0V to 5.5V
Junction Temperature Range ------------------------------------------------------------------------------
40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------
40°C to 85°C
VA
+
-
+
-
+
-
UV
Comparator
Oscillator
1.2MHz/440kHz
Foldback
Control
0.5V
Internal
Regulator
+
-
1V
1µA
Shutdown
Comparator
Current Sense
Amplifier
BOOT
VIN
GND
SW
FB
EN
COMP
3V
10k
VA VCC
VCC
Slope Comp
Current
Comparator
SS
10µA
VCC
+
-
EA
0.92V
Gm = 680µA/V
+
Logic


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