Data Sheet
ADM1073
Rev. B | Page 7 of 24
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
ADM1073
TOP VIEW
(Not to Scale)
ESTART 1
V
IN
2
PWRGD 3
SS 4
SENSE 5
SHDN
TIMER
UV
OV
DRAIN
14
13
12
11
10
V
EE
6
ATCHED 7
GATE
SPLYGD
9
8
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin Number Mnemonic
Function
1
RESTART
Input Pin. Edge-triggered 5-second shutdown and automatic restart.
2
VIN
Shunt Regulated Positive Supply to Chip. Connect to the positive supply rail via shunt resistor. A 1 礔
capacitor to V
EE
is recommended on the V
IN
pin.
3
PWRGD
Open Drain Output. Signals that the hot swap is complete.
4
SS
Analog Pin for Soft Start. An external capacitor on this pin sets the ramp rate of the inrush current
profile. This pin can be overdriven to alter the current limit control loop threshold.
5
SENSE
Voltage Input from External Sense Resistor.
6
VEE
Ground Supply to Chip (usually a 48 V system supply). Also low-side sense resistor connection.
7
LATCHED
Open Drain Output. Signals the end of the PWM retry period after a current fault.
8
SPLYGD
Open Drain Output. Signals that the device is not in reset and that the supply is in operating voltage
window.
9
GATE
Output to External FET Gate Drive.
10
DRAIN
Analog Input for Monitoring of FET Drain Voltage.
11
OV
Input Pin for Overvoltage Detection Circuitry.
12
UV
Input Pin for Undervoltage Detection Circuitry.
13
TIMER
Analog Pin. An external capacitor on this pin sets the maximum allowable time in current limit, the
PWM on-time, and the PWM duty cycle.
14
SHDN
Input Pin. Level-triggered device shutdown and reset.
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