D52LC datasheet(5/12 Pages) MAXIM

Part #	D52LC

Description	16μA IQ,, 1.2A PWM Step-Down DC-DC Converters

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Manufacturer	MAXIM [Maxim Integrated Products]

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

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16µA IQ, 1.2A PWM DC-DC

Step-Down Converters

_______________________________________________________________________________________

5

LIGHT-LOAD SWITCHING WAVEFORMS

MAX1556/7 toc10

20mV/div

AC-COUPLED

VLX

VOUT

ILX

2V/div

0

4

µs/div

0

200mA/div

EXTERNAL FEEDBACK

SWITCHING WAVEFORMS

MAX1556/7 toc10b

VLX

ILX

2V/div

0

2

µs/div

0

200mA/div

VIN = 5V, VOUT = 3.3V, IOUT = 500mA

SOFT-START/SHUTDOWN WAVEFORMS

MAX1556/7 toc11

5V/div

ILX

VSHDN

VOUT

IIN

500mA/div

0

100

µs/div

0

1V/div

0

500mA/div

CSS = 470pF

RLOAD = 4

Ω

SOFT-START RAMP TIME vs. CSS

CSS (pF)

500

1000

1500

2000

10

0.1

0

2500

1

LOAD TRANSIENT

MAX1556/7 toc13

50mV/div

AC-COUPLED

500mA/div

VOUT

IOUT

20

µs/div

0

IOUTMIN = 20mA

LOAD TRANSIENT

MAX1556/7 toc14

50mV/div

AC-COUPLED

500mA/div

VOUT

IOUT

20

µs/div

0

IOUTMIN = 180mA

LINE TRANSIENT

MAX1556/7 toc15

10mV/div

AC-COUPLED

VIN

VOUT

ILX

3.5V

4V

40

µs/div

0

200mA/div

BODE PLOT

MAX1556/7 toc16

FREQUENCY (kHz)

100

10

1

-50

-40

-30

-20

-10

0

10

20

30

40

-60

-30

0

30

60

90

120

150

180

210

240

-60

0.1

1000

0dB

PHASE MARGIN = 53

°

COUT = 22

µF, RLOAD = 4Ω

Typical Operating Characteristics (continued)

(VIN = VINP = 3.6V, D1 = D2 = SHDN = IN, Circuits of Figures 2 and 3, TA = +25°C, unless otherwise noted.)

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