Programmable 300mA Camera Flash LED Driver
Dual matched regulated LED channels
300mA output current (150mA per channel)
1-wire EZDimTM Programmable LED Current
32 accurate dimming levels
Power efficiency up to 90%
Fractional pump 1x/1.5x
Low noise input ripple
Fixed High Frequency Operation 1MHz
“Zero” Current Shutdown Mode
Soft start and current limiting
Short circuit protection
Thermal shutdown protection
12-lead TDFN 3mm x 3mm package
Digital Still Cameras
Package Quantity Package
per Reel Marking
CAT3612HV2-T2 TDFN-12 3x3 2000
Note *: Plated lead finish is Matte Tin.
For other lead finish option, please contact factory.
The CAT3612 is a high-efficiency 1x/1.5x fractional
charge pump with programmable current in two LED
channels. Each channel delivers accurate regulated
current up to 150mA and make CAT3612 ideal for
driving one or two flash LEDs.
Low noise operation is achieved by operating at a
constant switching frequency of 1MHz which allows
the use of small external ceramic capacitors. The
1x/1.5x fractional charge pump supports a wide
range of input voltages from 3V to 5.5V with
efficiency up to 90%, and is ideal for Li-Ion battery
The EN/DIM logic input provides a 1-wire EZDimTM
interface for dimming control of the LEDs. When
enabled, pulsing the EN/DIM reduces the LED
current on each negative edge in 31 linear steps
from 150mA down to zero current.
The device is available in the tiny 12-lead thin DFN
3mm x 3mm package with a max height of 0.8mm.
TYPICAL APPLICATION CIRCUIT
12-lead TDFN 3mm x 3mm
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Note: Unused LED channel must be connected to VOUT
1 Doc. No. 5016 Rev. A