MAX1553_15 datasheet(5/10 Pages) MAXIM

Part #	MAX1553

Description	High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs

PDF	10 Pages

Scroll/Zoom	100%

Manufacturer	MAXIM [Maxim Integrated Products]

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

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5 / 10 page

MAX1553/MAX1554

High-Efficiency, 40V Step-Up

Converters for 2 to 10 White LEDs

Maxim Integrated | 5

www.maximintegrated.com

SWITCHING WAVEFORMS

(CONTINUOUS OPERATION,

3.75V Li+ BATTERY, 18mA OUTPUT)

MAX1553/54 toc10

μs/div

VLX

VOUT

10V/div

200mV/div

200mA/div

L1 = 47

μH, 4700pF CAPACITOR ACROSS LEDs

SWITCHING WAVEFORMS

(DISCONTINUOUS OPERATION,

3.75V Li+ BATTERY, 10mA OUTPUT)

MAX1553/54 toc11

μs/div

VLX

VOUT

10V/div

200mV/div

200mA/div

L1 = 47

μH, 4700pF CAPACITOR ACROSS LEDs

STARTUP/SHUTDOWN WAVEFORMS

MAX1553/54 toc12

40ms/div

VEN

VFB

VOUT

5V/div

200mV/div

10V/div

L1 = 22

μH

BRT STEP RESPONSE

MAX1553/54 toc13

20ms/div

VBRT

VFB

VOUT

1V/div

200mV/div

2V/div

L1 = 22

μH,

VBRT = 0.5V TO 1.25V TO O.5V

Typical Operating Characteristics (continued)

(MAX1553 driving six white LEDs, VCC = VEN = 3.6V, Circuit of Figure 1, TA = +25°C, unless otherwise noted.)

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