SC4508 Ver la hoja de datos (PDF) - Semtech Corporation

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componentes Descripción

Fabricante

SC4508

Buck or Buck-Boost(Inverting) Current Mode Controller

Semtech Corporation 

SC4508

POWER MANAGEMENT

Electrical Characteristics

Unless specified: VDD = 2.7V to 15V , TA = TJ = -40°C to 125°C

Parameter

Test Conditions

Min

Typ

PWM Comparator

Delay to Output

50

VREF Reference

Output Voltage

1.231

1.25

Output Current

Line Regulation

VDD = 2.7 to 15V, IVREF = 1mA

4

Load Regulation

VDD = 5V, IVREF = 0 to 1mA

4

Soft Start/Shutdown

Charge Current

20

Discharge Current

12

SHDN Logic Hight Voltage

2

SHDN Logic Low Voltage

Current Limit

Cycle by Cycle Threshold

Shutdown Threshold

VDD = 5V

90

110

0.16

Delay to Output

50

Output

Gate Drive On-Resistance(H)

VDD = 5V, ISOURCING = 250mA

20

Gate Drive On-Resistance(L)

VDD = 5V, ISINK = 250mA

20

Rise Time

COUT = 200pF

20

Fall Time

COUT = 200pF

20

Note:

(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.

Max

1.269

1

0.25

130

Unit

ns

V

mA

mV

mV

µA

mA

V

V

mV

V

nS

Ohm

Ohm

nS

nS

 2004 Semtech Corp.

3

www.semtech.com

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