MAX1664 datasheet(6/16 Pages) MAXIM

Part #	MAX1664

Description	Active-Matrix Liquid Crystal Display AMLCD Supply

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Manufacturer	MAXIM [Maxim Integrated Products]

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Active-Matrix Liquid Crystal Display

(AMLCD) Supply

6

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(fBPCLK = 22.5kHz, FPLL = GND, L1 = 3.3µH, L2 = 4.7µH, TA = +25°C, unless otherwise noted.)

VIN = 3.3V; VOUT2+ = 15V/8mA, VOUT2- = -5V/10mA

NOTE: LX2N, LX2P PULSES ARE SYNCHED TO DC-DC 1

DC-DC 2 SWITCHING WAVEFORMS

DISCONTINUOUS CONDUCTION

VLX2N

VLX2P

IL2

5V/div

500mA/

div

1

µs/div

5V/div

CLOAD = 10,000pF

BPCLK TO BPDRV FALLING DELAY

BPCLK

BPDRV

2V/div

5V/div

100ns/div

5V/div

2V/div

BPDRV

BPCLK

100ns/div

BPCLK TO BPDRV RISING DELAY

MAX1664 TOC14(a))

CLOAD = 10,000pF

0

0.4

0.2

1.0

0.8

0.6

1.6

1.4

1.2

1.8

0

2

1

3

4

5

6

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

INCLUDES ALL

EXTERNAL COMPONENT

CURRENTS

5V/div

2V/div

5V/div

10V/div

5V/div

SHDN

VREF

VOUT2-

VOUT2+

RDY

VOUT1

500

µs/div

OUT-OF-SHUTDOWN SEQUENCE

MAX1664 TOC16(a)

5V/div

500mA/div

VLX1

ILI

IOUT1 = 300mA, L1 = 3.3µH

500ns/div

DC-DC 1 SWITCHING WAVEFORMS

MAX1664 TOC17(a)

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