SC4524CSETRT datasheet(4/22 Pages) SAMTEC

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SC4524C

Parameter

Conditions

Min

Typ

Max

Units

Minimum Switch On-time

Minimum Switch Off-time

Switch Leakage Current

µA

Minimum Bootstrap Voltage

SW = -2.6A

2.3

BST Pin Current

SW = -2.6A

Oscillator

Switching Frequency

OSC = 2.kΩ

.04

.56

MHz

OSC = 73.2kΩ

230

300

370

kHz

Foldback Frequency

OSC = 2.kΩ, VFB = 0

250

kHz

OSC = 73.2kΩ, VFB = 0

Soft Start and Overload Protection

SS/EN Shutdown Threshold

0.2

0.3

0.4

SS/EN Switching Threshold

FB = 0 V

0.95

Soft-start Charging Current

SS/EN = 0 V

µA

SS/EN = .5 V

2.4

3.2

Soft-start Discharging Current

µA

Hiccup Arming SS/EN Voltage

SS/EN Rising

2.5

Hiccup SS/EN Overload Threshold

SS/EN Falling

Hiccup Retry SS/EN Voltage

SS/EN Falling

0.6

Over Temperature Protection

Thermal Shutdown Temperature

°C

Thermal Shutdown Hysteresis

°C

Note : Switch current limit does not vary with duty cycle.

Electrical Characteristics (Cont.)

Unless otherwise noted, V

IN = 2V, VBST = 5V, VSS = 2.2V, -40°C < TJ < 25°C, ROSC = 2.kΩ.

SC4524CSETRT Datasheet(PDF) 4 Page - Samtec, Inc

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