SC4524B Ver la hoja de datos (PDF) - Semtech Corporation

Número de pieza

componentes Descripción

Fabricante

SC4524B

18V 2A Step-Down Switching Regulator

Semtech Corporation 

Electrical Characteristics (Cont.)

Unless otherwise noted, VIN = 12V, VBST = 15V, VSS = 2.2V, -40°C < TA = TJ < 125°C, ROSC = 12.1kΩ.

Parameter

Conditions

Minimum Switch On-time

Minimum Switch Off-time

Switch Leakage Current

Minimum Bootstrap Voltage

BST Pin Current

Oscillator

ISW = -2.6A

ISW = -2.6A

Switching Frequency

Foldback Frequency

Soft Start and Overload Protection

ROSC = 12.1kΩ

ROSC = 93.1kΩ

ROSC = 12.1kΩ, VFB = 0

ROSC = 93.1kΩ, VFB = 0

SS/EN Shutdown Threshold

SS/EN Switching Threshold

Soft-start Charging Current

Soft-start Discharging Current

VFB = 0 V

VSS/EN = 0 V

VSS/EN = 1.5 V

Hiccup Arming SS/EN Voltage

Hiccup SS/EN Overload Threshold

Hiccup Retry SS/EN Voltage

Over Temperature Protection

VSS/EN Rising

VSS/EN Falling

VSS/EN Falling

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

Note 1: Switch current limit does not vary with duty cycle.

SC4524B

Min

Typ

Max Units

135

ns

100

150

ns

10

µA

1.8

2.3

V

60

95

mA

1.04

1.3

1.56

MHz

240

300

360

kHz

110

230

350

kHz

50

100

170

0.2

0.3

0.4

V

1.0

1.13

1.3

V

1.7

µA

1.2

2.0

2.8

1.5

µA

2.15

V

1.9

V

0.6

1.0

1.2

V

165

°C

10

°C



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