CAT4004
4-Channel Constant Current LED Driver with EZDim™
FEATURES
DESCRIPTION
Four LED current sinks with tight matching
Low Dropout Driver 130mV at 30mA
No switching noise
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.
Shutdown current < 1μA
LED current set by external resistor
Dimming via 1-wire EZDimTM interface
Thermal shutdown protection
RoHS Compliant
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.
8-lead 2mm x 3mm TDFN package
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).
APPLICATIONS
LCD Display Backlight
Cellular Phones
The device is available in a tiny 8-lead TDFN 2mm x 3mm
package with a max height of 0.8mm.
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Quantity Package
For Ordering Information details, see page 10.
Part Number
Package
per Reel
Marking
CAT4004VP2-T3 TDFN-8 (1)
CAT4004VP2-GT3 TDFN-8 (2)
3000
FT
3000
HA
Notes: (1) Matte-Tin Plated Finish (RoHS-compliant).
(2) NiPdAu Plated Finish (RoHS-compliant).
PIN CONFIGURATION
TYPICAL APPLICATION CIRCUIT
VIN
8-lead TDFN Package
2.4V
to
20mA
(Top View)
CIN
1
2
3
4
8
7
6
5
EN/DIM
GND
VIN
1µF
5.5V
RSET
LED4
LED3
LED1 LED2 LED3 LED4
VIN
CAT4004
LED1
LED2
One wire
programming
CAT4004
EN/DIM
RSET
RSET
3.8kΩ
GND
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-5024 Rev. B