Data Sheet

ADP1972

Rev. B | Page 3 of 18

SPECIFICATIONS

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).

Table 1.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

INPUT VOLTAGE (VIN)

Voltage Range

6

60

V

VIN Supply Current

1.5

2.5

mA

VIN Shutdown Current

15

70

μA

UVLO Threshold Rising

5.71

6

V

UVLO Threshold Falling

5.1

5.34

V

SOFT START (SS)

SS Pin Current

4

5

6

μA

SS Threshold Rising

0.52

0.65

V

SS Threshold Falling

0.4

0.5

V

PWM CONTROL

FREQ

Frequency Range

50

300

kHz

Oscillator Frequency

90

100

110

kHz

FREQ Pin Voltage

1.2

1.252

1.3

V

SYNC

Maximum SYNC Pin Voltage

5.5

V

SYNC Pull-Down Resistor

0.5

1

1.5

MΩ

SYNC Output (Internal Frequency Control)

Internal SYNC Range

For SYNC output

50

300

kHz

SYNC Output Clock Duty Cycle

40

50

60

%

SYNC Sink Resistance

10

20

Ω

SYNC Input (External Frequency Control)

External SYNC Range

For SYNC input clock

50

300

kHz

SYNC Threshold Rising

1.2

1.5

V

SYNC Threshold Falling

0.7

1.05

V

1.11

SCFG

SCFG High Threshold Rising

4.53

4.7

V

SCFG High Threshold Falling

4.25

4.51

V

SCFG Low Threshold Rising

0.52

0.65

V

SCFG Low Threshold Falling

0.4

0.5

V

SCFG Current

9.5

11

12.5

μA

DMAX

Maximum Internal Duty Cycle

97.37

%

DMAX Setting Current

9.5

11

12.5

μA

DMAX and SCFG Current Matching1

10

%

COMP

Maximum COMP Pin Voltage

5

V

Internal Peak-to-Peak Ramp Voltage

V p-p

4

V

COMP Maximum Internal Ramp Voltage

4.5

V

COMP Minimum Internal Ramp Voltage

Internal oscillator is disabled

0.45

0.5

0.55

V

DH and DL Shutdown Range2

COMP not regulated

0.45

V

Maximum Duty Cycle Range2

4.4

V