CAT4004
4-Channel Constant Current LED Driver with EZDim™
FEATURES
Four LED current sinks with tight matching
Low Dropout Driver 130mV at 30mA
No switching noise
Shutdown current < 1μA
LED current set by external resistor
Dimming via 1-wire EZDim
TM
interface
Thermal shutdown protection
RoHS Compliant
8-lead 2mm x 3mm TDFN package
DESCRIPTION
The CAT4004 provides four matched low dropout current
sources to drive LEDs. An external resistor on RSET sets
the current in the LED channels. Each LED channel
includes an individual control loop allowing the device to
handle a wide range of LED forward voltages while still
maintaining tight current matching.
The EN/DIM logic inputs supports device enable and a
digital dimming interface for current setting of all LEDs.
Six different current dimming ratios are available.
The device is aimed at “direct drive” battery applications.
It is required that the battery or voltage source have
enough headroom to drive the LED forward voltage and
current sink (>150mV).
The device is available in a tiny 8-lead TDFN 2mm x 3mm
package with a max height of 0.8mm.
APPLICATIONS
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Part Number
CAT4004VP2-T3
Package
TDFN-8
(1)
(2)
Quantity
per Reel
3000
3000
Package
Marking
FT
HA
CAT4004VP2-GT3 TDFN-8
Notes:
(1) Matte-Tin Plated Finish (RoHS-compliant).
(2) NiPdAu Plated Finish (RoHS-compliant).
PIN CONFIGURATION
8-lead TDFN Package
(Top View)
EN/DIM
1
GND
2
LED1
3
LED2
4
CAT4004
8
VIN
7
RSET
6
LED4
5
LED3
TYPICAL APPLICATION CIRCUIT
V
IN
2.4V
to
5.5V
C
IN
1µF
LED1 LED2 LED3 LED4
VIN
One wire
programming
RSET
3.8kΩ
EN/DIM
RSET
GND
CAT4004
20mA
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-5024 Rev. B
CATALYST [ CATALYST SEMICONDUCTOR ]
