MAX1572 datasheet(5/11 Pages) MAXIM

Part #	MAX1572

Description	800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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800mA, 2MHz, PWM DC-to-DC

Step-Down Converter with RESET

_______________________________________________________________________________________

5

60

0

2.0

5.5

INPUT CURRENT vs. INPUT VOLTAGE

WITH NO LOAD

30

10

20

50

40

INPUT VOLTAGE (V)

2.5

3.0

4.0

4.5

5.0

3.5

HEAVY-LOAD SWITCHING WAVEFORMS

MAX1572 toc08

VLX

IL

VOUT

RIPPLE

10mV/div

500mA/div

2V/div

200ns/div

ILOAD = 500mA

LIGHT-LOAD SWITCHING WAVEFORMS

MAX1572 toc09

VLX

IL

VOUT

RIPPLE

20mV/div

500mA/div

2V/div

2

µs/div

ILOAD = 20mA

SOFT-START/SHUTDOWN WAVEFORMS

MAX1572 toc10

VEN2

IIN

VOUT

1V/div

100mA/div

2V/div

200

µs/div

RESET WAVEFORM

MAX1572 toc11

VEN2

IIN

VRESET

VOUT

1V/div

100mA/div

2V/div

100ms/div

LOAD TRANSIENT, FORCED-PWM MODE

MAX1572 toc12

ILOAD

VOUT

500mA/div

100mV/div

4

µs/div

ILOAD = 20mA TO 550mA

Typical Operating Characteristics (continued)

(VBATT = 3.6V, VOUT = 1.5V, EN1 = GND, EN2 = BATT, TA = +25°C, unless otherwise noted.)

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