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EL7516 Datasheet(PDF) 3 Page - International Rectifier

Part # EL7516
Description  600kHz/1.2MHz PWM Step-Up Regulator
PDF  11 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

EL7516 Datasheet(HTML) 3 Page - International Rectifier

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3
FN7333.3
Block Diagram
Typical Application Circuit
COMPARATOR
OSCILLATOR
SHUTDOWN &
START-UP
CONTROL
LX
VDD
FSEL
SHDN
SS
REFERENCE
GENERATOR
PWM LOGIC
CONTROLLER
FET
DRIVER
CURRENT
SENSE
GM
AMPLIFIER
GND
FB
COMP
Pin Descriptions
PIN NUMBER
PIN NAME
DESCRIPTION
1
COMP
Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to ground.
2
FB
Voltage feedback pin. Internal reference is 1.294V nominal. Connect a resistor divider from VOUT. VOUT =
1.294V (1 + R1 / R2). See Typical Application Circuit.
3
SHDN
Shutdown control pin. Pull SHDN low to turn off the device.
4
GND
Analog and power ground.
5
LX
Power switch pin. Connected to the drain of the internal power MOSFET.
6
VDD
Analog power supply input pin.
7
FSEL
Frequency select pin. When FSEL is set low, switching frequency is set to 620kHz. When connected to
high or VDD, switching frequency is set to 1.25MHz.
8
SS
Soft-start control pin. Connect a capacitor to control the converter start-up.
1
2
3
4
8
7
6
5
COMP
FB
SHDN
GND
SS
FSEL
VDD
LX
+
+
3.9k
Ω
4.7nF
27nF
22µF
C3
C1
0.1µF
10µH
D1
22µF
C2
12V
2.7V TO 5.5V
R3
C5
85.2k
Ω
R1
10k
Ω
R2
C4
EL7516



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