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New prod uc t ap7176b, Operating waveforms, Ap7176b – Diodes AP7176B User Manual

Page 8: Enable, Shutdown, Over current protection, Load transient response, Power off, Power on

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AP7176B

Document number: DS35818 Rev.3 - 2

8 of 14

www.diodes.com

April 2014

© Diodes Incorporated

NEW PROD

UC

T

AP7176B

Operating Waveforms

(Test Conditions V

IN

= 1.8V, V

CNTL

= 5V, V

OUT

1.2V, T

A

= +25°C unless otherwise specified.)

Enable

C

OUT

= 10µF, C

IN

= 10µF, R

L

= 0.4Ω

CH1: V

EN

, 5V/Div, DC

CH2: V

OUT

, 1V/Div, DC

CH3: V

PG

, 5V/Div, DC

CH4: I

OUT

, 2A/Div, DC

TIME: 1ms/Div

V

EN

V

OUT

V

PG

I

OUT

Shutdown

C

OUT

= 10µF, C

IN

= 10µF, R

L

= 0.4Ω

CH1: V

EN

, 5V/Div, DC

CH2: V

OUT

, 1V/Div, DC

CH3: V

PG

, 5V/Div, DC

CH4: I

OUT

, 2A/Div, DC

TIME: 4µs/Div

V

EN

V

OUT

V

PG

I

OUT

Over Current Protection

C

OUT

= 10µF, C

IN

= 10µF, I

OUT

= 2A to 5.6A

CH1: V

OUT

, 0.5V/Div, DC

CH4: I

OUT

, 2A/Div, DC

TIME: 0.2ms/Div

V

OUT

I

OUT

Load Transient Response

I

OUT

= 10mA to 3A to10mA (rise / fall time = 1µs)

C

OUT

= 10µF, C

IN

= 10µF

CH2: V

OUT

, 50mV/Div, AC

CH4: I

OUT

, 1A/Div, DC

TIME: 50µs/Div

V

OUT

I

OUT

Power Off

C

OUT

= 10µF, C

IN

=10µF, R

L

= 0.4Ω

CH1: V

CNTL

, 5V/Div, DC

CH2: V

IN

, 1V/Div, DC

CH3: V

OUT

, 1V/Div, DC

CH4: V

PG

, 5V/Div, DC

TIME: 2ms/Div

V

IN

V

CNTL

V

OUT

V

PG

Power On

C

OUT

=10µF, C

IN

=10µF, R

L

= 0.4Ω

CH1: V

CNTL

, 5V/Div, DC

CH2: V

IN

, 1V/Div, DC

CH3: V

OUT

, 1V/Div, DC

CH4: V

PG

, 5V/Div, DC

TIME: 2ms/Div

V

IN

V

CNTL

V

OUT

V

PG