Absolute Maximum Ratings
Operating Junction Temperature, TJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to 150°C
Lead Temperature Soldering:
Reflow (SMD styles only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Sec max. above 183˚C, 230˚C Peak
Storage Temperature Range, TS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to 150˚C
VMAX
VMIN
ISOURCE
ISINK
Pin Symbol
Pin Name
VCC
IC Power Input
20V
6V
-0.3V
-0.3V
-0.3V
-0.3V
N/A
1.5A Peak 200mA DC
SS
Soft Start Capacitor
200µA
10mA
1mA
10µA
1mA
1mA
COMP
VFB
Compensation Capacitor
Voltage Feedback and Current
Sense Comparator Input
Off-Time Capacitor
Voltage ID DAC Inputs
High-Side FET Driver
6V
6V
COFF
VID0-4
GATE(H)
6V
6V
20V
-0.3V
-0.3V
-0.3V
1mA
1mA
50mA
10µA
1.5A Peak
200mA DC
1.5A Peak
200mA DC
1mA
1.5A Peak
200mA DC
1.5A Peak
200mA DC
1mA
GATE(L)
Low-Side FET Driver
20V
-0.3V
ISENSE
PWRGD
PGnd
Current Sense Comparator Input
Power-Good Output
Power Ground
6V
6V
0V
-0.3V
-0.3V
0V
10µA
30mA
N/A
1.5A Peak
200mA DC
100mA
LGnd
Logic Ground
0V
0V
N/A
Package Pin Description
FUNCTION
PACKAGE PIN #
PIN SYMBOL
IDO – VID4
1,2,3,4,6
V
Voltage ID DAC inputs. These pins are internally pulled up to 5V if left
open. VID4 selects the DAC range. When VID4 is high (logic one), the
Error Amp reference range is 2.125V to 3.525V with 100mV increments.
When VID4 is low (logic zero), the Error amp reference voltage is 1.325V
to 2.075V with 50mV increments.
5
7
SS
Soft Start Pin. A capacitor from this pin to LGnd sets the Soft Start and
fault timing.
COFF
Off-Time Capacitor Pin. A capacitor from this pin to LGnd sets both the
normal and extended off time.
8
ISENSE
Current Sense Comparator Inverting Input
Input Power Supply Pin.
9
VCC
10
11
12
13
GATE(H)
PGnd
High Side Switch FET driver pin.
High Current ground for the GATE(H) and GATE(L) pins.
Low Side Synchronous FET driver pin.
GATE(L)
PWRGD
Power-Good Output. Open collector output drives low when VFB is out
of regulation.
14
15
LGnd
Reference ground. All control circuits are referenced to this pin.
COMP
Error Amp output. PWM Comparator reference input. A capacitor to
LGnd provides Error Amp compensation.
16
VFB
Error Amp, PWM Comparator feedback input, Current Sense
Comparator Non-Inverting input, and PWRGD comparator input.
2
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
