CAT4137 datasheet(3/16 Pages) ONSEMI

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CAT4137

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Table 3. ELECTRICAL OPERATING CHARACTERISTICS

(VIN = 3.6 V, ambient temperature of 25°C (over recommended operating conditions unless otherwise specified))

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Operating Current

VFB = 0.3 V

VFB = 0.4 V (not switching)

0.4

0.1

1.5

0.3

ISD

Shutdown Current

VSHDN = 0 V

0.1

VFB

FB Pin Voltage

3 LEDs with ILED = 20 mA

285

300

315

IFB

FB pin input leakage

0.1

ILED

Programmed LED Current

R1 = 10 W

R1 = 15 W

R1 = 20 W

28.5

14.25

31.5

15.75

VIH

VIL

SHDN Logic High

SHDN Logic Low

Enable Threshold Level

Shutdown Threshold Level

0.4

0.8

0.7

1.5

FSW

Switching Frequency

0.7

1.0

1.3

MHz

ILIM

Switch Current Limit

250

300

400

RSW

Switch “On” Resistance

ISW = 100 mA

1.0

2.0

ILEAK

Switch Leakage Current

Switch Off, VSW = 5 V

TSD

Thermal Shutdown

150

°C

THYS

Thermal Hysteresis

°C

Efficiency

Typical Application Circuit

VUVLO

Undervoltage Lockout (UVLO) Threshold

1.9

VOV-SW

Output Clamp Voltage

“Open LED” fault

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