SC4620 Просмотр технического описания (PDF) - Semtech Corporation

Номер в каталоге

Компоненты Описание

производитель

SC4620

Low Input Voltage, High Effciency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator

Semtech Corporation 

SC4620

POWER MANAGEMENT

OTyppeicratlioPnerformancSetarCt uhpabryaVcitneristics

Circuit condition: ApplicTeasttcioondnitiocni:r5cViun,i1tV#o,1Io,=05A VIN, 1VOUT

Start up by Vin

Test condition: 5Vin, 1Vo, Io=0A

5V/DIV

5V/DIV

VVinIN

SSSS

VVoOuUTt

5V/DIV

5V/DIV

VVinIN

SSSS

VVoOuUtT

0.5V/DIV

5V/DIV

10ms/DIV

Figure 1S. hSutatdrotwUnpbbyyVVinIN@0A

Test condition: 5Vin, 1Vo, Io=0A

PPGGOOODOD

0.5V/DIV

5V/DIV

10ms/DIV

Figure 2S.hSuttdaortwUnpbybyViVnIN@2.5A

Test condition: 5Vin, 1Vo, Io=4A

PPGGOOODOD

5V/DIV

5V/DIV

0.5V/DIV

5V/DIV

5ms/DIV

FiguTrera3.nSshiuetdnotwrnebsy pVIoN@n0sAe

VVIiNn

SSSS

VVOoUuT t

PPGGOOOODD

5V/DIV

5V/DIV

0.5V/DIV

5V/DIV

1ms/DIV

Figure 4. Shutdown by VIN@2.5A

Transient response

VVinIN

SSSS

VOUT

Vout

PPGGOOODOD

20mV/DIV

VOUT

40mV/DIV

VOUT

1A/DIV

20us/DIV

lOUT

2.0V/DIV

1us/DIV

VPHASE

Figure 5. Transient Response@ 0 to 2.5A

 2008 Semtech Corp.



Figure 6. Ripple and Stability@2.5A

www.semtech.com

Share Link: