MAX1928EUB25 datasheet(6/12 Pages) MAXIM

Part #	MAX1928EUB25

Description	Low-Output-Voltage, 800mA, PWM Step-Down DC-DC Converters

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Output-Voltage, 800mA, PWM Step-Down

DC-DC Converters

6

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuits of Figure 3 and 4, TA = +25°C, unless otherwise noted.)

INPUT VOLTAGE (V)

5.1

4.6

4.1

3.6

3.1

0.2

0.4

0.6

0.8

1.0

1.2

1.4

VOUT = 1.8V

VOUT = 2.5V

VOUT = 1V

0

2.6

5.6

MAXIMUM LOAD CURRENT

vs. INPUT VOLTAGE

STARTUP WAVEFORM

MAX1927 toc11

1ms/div

5V/div

1V/div

200mA/div

SHDN

VOUT

IIN

POK WAVEFORM

MAX1927 toc12

20ms/div

5V/div

2V/div

SHDN

VOUT

POK

HEAVY-LOAD SWITCHING WAVEFORMS

MAX1927 toc13

400ns/div

10mV/div

200mA/div

5V/div

VOUT

(AC-COUPLED)

IL

LX

LIGHT-LOAD SWITCHING WAVEFORMS

MAX1927 toc14

2ms/div

10mV/div

200mA/div

5V/div

VOUT

(AC-COUPLED)

IL

LX

LOAD TRANSIENT

MAX1927 toc15

100

µs/div

100mV/div

250mA

900mA

500mA/div

VOUT

(AC-COUPLED)

ILOAD

LINE TRANSIENT

MAX1927 toc16

1ms/div

10mV/div

2V/div

4.2V

3V

VOUT

(AC-COUPLED)

VIN

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MAX1928EUB25 Datasheet(PDF) 6 Page - Maxim Integrated Products

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