Rainbow-electronics MAX8815A Manual do Utilizador descarregar pdf (Página 6)

MAX8815A

1A, 97% Efficiency, 30µA Quiescent Current

Step-Up Converter with True Shutdown

6 _______________________________________________________________________________________

200ns/div

HEAVY-LOAD SWITCHING

WAVEFORMS

50mV/div

AC-COUPLED

OUT

MAX8815A toc14

5V/div

1A/div

OUT

= 500mA

μs/div

LIGHT-LOAD SWITCHING

WAVEFORMS (SKIPB = LOW)

20mV/div

AC-COUPLED

OUT

MAX8815A toc15

2V/div

500mA/div

OUT

= 10mA

200ns/div

LIGHT-LOAD SWITCHING

WAVEFORMS (SKIPB = HIGH)

20mV/div

AC-COUPLED

OUT

MAX8815A toc16

2V/div

500mA/div

OUT

= 10mA

100

μs/div

LINE TRANSIENT

20mV/div

AC-COUPLED

OUT

MAX8815A toc17

2V/div

4.2V

1ms/div

LOAD TRANSIENT

OUT

200mV/div

5V DC OFFSET

500mV/div

MAX8815A toc18

OUT

800mA

10mA

200μs/div

STARTUP WAVEFORM

(NO LOAD)

OUT

MAX8815A toc19

5V/div

1A/div

Typical Operating Characteristics (continued)

OUTS

= V

POUT

= 5V, V

BATT

= V

= 3.6V, V

SKIPB

= GND.)

1 2 3 4 5 6 7 8 9 10 11 12

MAX8815A 1

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