ISL97516 Intersil Corporation, ISL97516 Datasheet - Page 3

• Manufacturer Part Number: ISL97516
• Description: PWM Step-Up Regulator
• Manufacturer: Intersil Corporation

Pin Descriptions
Block Diagram
Typical Application Circuit
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
VDD
COMP
FSEL
GND
VDD
FB
EN
SS
LX
4.7nF
3
3.9kΩ
GENERATOR
REFERENCE
C
R
5
3
Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to ground.
Voltage feedback pin. Internal reference is 1.294V nominal. Connect a resistor divider from V
V
Shutdown control pin. Pull EN low to turn off the device.
Analog and power ground.
Power switch pin. Connected to the drain of the internal power MOSFET.
Analog power supply input pin.
Frequency select pin. When FSEL is set low, switching frequency is set to 620kHz. When connected to
high or V
Soft-start control pin. Connect a capacitor to control the converter start-up.
OUT
COMPARATOR
COMP
= 1.294V (1 + R
R
1
DD
10kΩ
85.2kΩ
, switching frequency is set to 1.25MHz.
R
2
OSCILLATOR
S1
FSEL
1
2
3
4
AMPLIFIER
CURRENT
1
/R
SENSE
COMP
FB
EN
GND
ISL97516
GM
2
). See Typical Application Circuit.
CONTROLLER
PWM LOGIC
FSEL
VDD
SS
LX
8
7
6
5
SHUTDOWN &
EN
CONTROL
START-UP
DESCRIPTION
C
27nF
C
0.1µF
SS
3
4
DRIVER
+
FET
C
22µF
1
10µH
D
1
2.3V TO 5.5V
+
22µF
C
2
LX
GND
FB
12V
December 22, 2006
OUT
.
FN9261.1