ISL81801

3. Specifications

FN8937 Rev.1.4

Page 13 of 49

Mar 8, 2024

3.4

Electrical Specifications

Recommended operating conditions unless otherwise noted. See Block Diagram and Typical Application Schematics. VIN = 4.5V to 80V, or

VDD = 8V ±10%, C_VCC5V = 4.7µF, TA = -40°C to +125°C, Typical values are at TA = +25°C, unless otherwise specified. Boldface limits

apply across the operating temperature range, -40°C to +125°C.

Parameter

Symbol

Test Conditions

Min

(Note 6)Typ

Max

(Note 6)Unit

VIN Supply

Input Voltage Range

VIN

4.5

80.0

V

VIN Supply Current

Shutdown Current (Note 7)IVINQ

EN = 0V, PGOOD is floating

2.7

6.0

µA

Operating Current (Note 8)IVINOP

PGOOD is floating, EXTBIAS = 0V

5

7

mA

PGOOD is floating, EXTBIAS = 12V

50

µA

VCC5V Supply

Internal LDO Output Voltage

VCC5V

VIN = 8V, IL = 0mA

4.7

5.0

5.4

V

VIN = 80V, IL = 0mA

4.7

5.0

5.4

V

VIN = 4.5V, IL = 5mA

4.00

4.25

V

VIN > 5.6V, IL = 10mA

4.65

5.00

V

Maximum Supply Current of

Internal LDO

IVCC_MAX

VVCC5V = 0V, VIN = 8V

120

mA

VDD Supply

Internal LDO Output Voltage

VDD

VIN = 12V, EXTBIAS = 0V, IL = 0mA

7.5

8.0

8.4

V

VIN = 80V, EXTBIAS = 0V, IL = 0mA

7.5

8.0

8.4

V

VIN = 4.5V, EXTBIAS = 12V, IL = 0mA

7.5

8.0

8.4

V

VIN = 80V, EXTBIAS = 12V, IL = 0mA

7.5

8.0

8.4

V

VIN = 4.5V, EXTBIAS = 0V, IL = 30mA

3.9

4.3

V

VIN = 4.5V, EXTBIAS = 7.8V, IL = 30mA

7.4

7.6

V

VIN > 8.6V, EXTBIAS = 0V, IL = 75mA

7.30

7.85

V

VIN = 4.5V, EXTBIAS > 9.0V, IL = 75mA

7.30

7.85

V

Maximum Supply Current of

Internal LDO

IVDD_MAX

VVDD = 0V, EXTBIAS = 0V, VIN = 12V

120

mA

VVDD = 4.5V, EXTBIAS = 12V, VIN = 4.5V

140

mA

EXTBIAS Supply

Switch Over Threshold Voltage, Rising

VEXT_THR

EXTBIAS voltage

7.10

7.38

7.55

V

Switch Over Threshold Voltage,

Falling

VEXT_THF

EXTBIAS voltage

6.60

6.85

7.10

V

VIN UVLO

VIN Rising UVLO Threshold (Note 10)VUVLOTHR

VIN voltage, 0mA on VCC5V and VDD

3.50

V

VIN Falling UVLO Threshold

VUVLOTHF

VIN voltage, 0mA on VCC5V and VDD

3.0

3.2

3.4

V

VCC5V Power-On Reset

VCC5V Rising POR Threshold

VPORTHR

VCC5V voltage, 0mA on VCC5V and VDD

3.7

4.0

4.3

V

VCC5V Falling POR Threshold

VPORTHF

VCC5V voltage, 0mA on VCC5V and VDD

3.30

3.55

3.75

V

EN/UVLO Threshold

EN Rise Threshold

VENSS_THR

VIN > 5.6V

0.75

1.05

1.30

V

EN Fall Threshold

VENSS_THF

VIN > 5.6V

0.60

0.90

1.10

V

EN Hysteresis

VENSS_HYST

VIN > 5.6V

70

150

300

mV

UVLO Rise Threshold

VUVLO_THR

VIN > 5.6V

1.77

1.80

1.83

V

UVLO Hysteresis Current

IUVLO_HYST

VIN = 12V, EN/UVLO = 1.815V

2.5

4.4

6.0

µA