CAT3612 Datasheet | Catalyst Semiconductor

.. Programmable 300m A Camera Flash LED Driver Features - - - - - - - - - - - - - Dual matched regulated LED channels 300m A output current (150m A per channel) 1-wire EZDim TM 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 PRODUCT DESCRIPTION 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 150m A 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 powered devices. The EN/DIM logic input provides a 1-wire EZDim TM 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 150m A 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. APPLICATION - Camera Flash - Cellular Phones - Digital Still Cameras ORDERING INFORMATION Part Number Package Quantity Package per Reel Marking 2000 HAAD CAT3612HV2-T2 TDFN-12 3x3 Green - Note - : Plated lead finish is Matte Tin. For other lead finish option, please contact factory. PIN CONFIGURATION Top View TYPICAL APPLICATION CIRCUIT 12-lead TDFN 3mm x 3mm Note: Unused LED channel must be connected to VOUT © 2006 Catalyst Semiconductor, Inc. Characteristics subject to change without notice Doc. No. 5016 Rev....