SC401B 데이터 시트보기 (PDF) - Semtech Corporation

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SC401B

15A Integrated FET Regulator with Programmable LDO

Semtech Corporation 

SC401B

Electrical Characteristics (continued)

Parameter

Conditions

Min Typ Max Units

Input Supplies (continued)

ENL , EN/PSV = 0V, no external 5V VDD

ENL , EN/PSV = 0V, external 5V VDD supply

3

7

μA

190 300

VDD Supply Current

EN/PSV = VDD (PSAVE), No load, VFB > 600mV

0.7

FB On-Time Threshold

Frequency Range

VDD = 5V, fSW = 250kHz, EN/PSV = floating , no load(2)

9

mA

VDD = 3V, fSW = 250kHz, EN/PSV = floating , no load(2

5.5

Static VIN and load, TJ = 0 to +125 °C

0.595 0.6 0.605

V

Static VIN and load, TJ = -40 to +125 °C

0.594 0.6 0.606

V

Continuous mode operation

1000 kHz

Bootstrap Switch Resistance

10

Ω

Timing

On-Time

Minimum On-Time (2)

Continuous mode operation,

VIN = 12V, VOUT = 5V, fSW= 300kHz, RTON = 133kΩ

999 1110 1220 ns

80

ns

Minimum Off-Time (2)

VDD = 5V

VDD = 3.3V

250

ns

370

Soft-Start

Soft-Start Current

3.0

µA

Soft-Start Voltage(2)

Analog Inputs/Outputs

When VOUT reaches regulation

1.5

V

VOUT Input Resistance

500

kΩ

Current Sense

Zero-Crossing Detector Threshold

LX - PGND

-3

0

+3

mV

Power Good

Power Good Threshold

Start-Up Delay Time

(between PWM enable and PGOOD high)

Upper limit, VFB > internal 600mV reference

Lower limit, VFB < internal 600mV reference

VDD = 5V, CSS = 10nF

VDD = 3.3V, CSS = 10nF

+20

%

-10

%

12

ms

7



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