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4

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GENFR

TM

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Featured Products

w h i t e l e d d r i v e r s

CAT3606

6-Channel Fractional Charge Pump LED Driver

Features

■

independent dimming and standby control

for Main and Sub displays

■

automatically switches from 1x LDO mode to

1.5x boost mode

■

inductor-less design minimizes EMI

interference

■

drives up to 6 Parallel LEDs at 30mA per

channel

■

very low input ripple and noise

■

“zero”shutdown current extends battery life

■

power efficiency up to 90%

■

short circuit detect/disable on all channels

■

optimized for use with Lithium-Ion battery systems

Package Information

■

16-pad TQFN (4x4mm,height 0.8mm max)

+

-

1.2V

Reference

1MHz

Oscillator

VIN

CIN

3≤VIN≤4.2V

Battery

EN

RSET

RSET

ENM

ENS

LED Output

Selection

Current

Setting

Mode Control

1x mode (LDO)

1.5x Charge Pump

CAT3606

LED1

LED2

LED3

LED4

LED5

LED6

6 Current

Sink Regulators

COUT

20mA

VOUT

C1-

C2-

C1+

C2+

Sub

Main

GND

CAT3604

4-Channel Fractional Charge Pump LED Driver

Features

■

automatically switches from 1x LDO mode to

1.5x boost mode

■

inductor-less design minimizes EMI interference

■

drives up to 4 Parallel LEDs at 30mA per channel

■

very low input ripple and noise

■

“zero”shutdown current extends battery life

■

power efficiency up to 93%

■

optimized for use with Lithium-Ion battery

systems

Package Information

■

16 pad TQFN (4x4mm,height 0.8mm max)

CAT3604

+

-

C1+

C2+

C1-

C2-

VIN

EN

CTR0

CTR1

CTR2

RSET

VOUT

LED1

LED2

LED3

LED4

COUT

20mA

RSET

VIN

3V to 4.2V

Battery

EN

Control 0

Control 1

Control 2

CIN

GND