ISL85415

2. Specifications

FN8373 Rev.5.01

Page 8 of 30

Jun.4.20

2.4

Electrical Specifications

Recommended operating conditions, TA = -40°C to +125°C, VIN = 3V to 36V, unless otherwise specified. Typical values are at TA = +25°C.

Boldface limits apply across the operating temperature range (-40°C to +125°C).

Parameter

Symbol

Test Conditions

Min

(Note 8)Typ

Max

(Note 8)Unit

Supply Voltage

VIN Voltage Range

VIN

336

V

VIN Quiescent Supply Current

IQ

VFB = 0.7V, SYNC = 0V, fSW = VCC

80

µA

VIN Shutdown Supply Current

ISD

EN = 0V, VIN = 36V (Note 6)1.8

2.5

µA

VCC Voltage

VCC

IOUT = 0mA

4.8

5.15

5.5

V

VIN = 6V; IOUT = 10mA

4.65

5

5.35

V

Power-on Reset

VCC POR Threshold

Rising Edge

2.75

2.95

V

Falling Edge

2.4

2.6

V

Oscillator

Nominal Switching Frequency

fSW

FS Pin = VCC

440

500

560

kHz

Resistor from FS pin to GND = 340kΩ

240

300

360

kHz

Resistor from FS pin to GND = 32.4kΩ

2000

kHz

Minimum Off-Time

tMIN_OFF VIN = 3V

150

ns

Minimum On-Time

tMIN_ON

(Note 9)90

ns

FS Voltage

VFS

RFS = 100kΩ

0.39

0.4

0.41

V

Synchronization Frequency

SYNC

300

2000

kHz

SYNC Pulse Width

100

ns

Error Amplifier

Error Amplifier Transconductance Gain

gm

External Compensation

165

230

295

µA/V

Internal Compensation

50

µA/V

FB Leakage Current

VFB = 0.6V

1

100

nA

Current Sense Amplifier Gain

RT

0.54

0.6

0.66

V/A

FB Voltage

0.594

0.600

0.606

V

Power-Good

Lower PG Threshold - VFB Rising

90

94

%

Lower PG Threshold - VFB Falling

82.5

86

%

Upper PG Threshold - VFB Rising

116.5

120

%

Upper PG Threshold - VFB Falling

107

112

%

PG Propagation Delay

Percentage of the soft-start time

10

%

PG Low Voltage

ISINK = 3mA, EN = VCC, VFB = 0V

0.05

0.3

V

Tracking and Soft-Start

Soft-Start Charging Current

ISS

1.5

2

2.5

µA

Internal Soft-Start Ramp Time

EN/SS = VCC

1.7

2.4

3.1

ms