CAT3603 Driver Datasheet

CAT3603 Datasheet PDF, Equivalent


Part Number

CAT3603

Description

3-Channel LED Driver

Manufacture

Catalyst Semiconductor

Total Page 12 Pages
Datasheet
Download CAT3603 Datasheet


CAT3603
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CAT3603
3-Channel LED Driver in 3x3mm Package
FEATURES
„ Drives up to 3 LEDs
„ Current setting resistor
„ Compatible with supply voltage of 3V to 5.5V
„ Power efficiency up to 91%
„ Output Current up to 30mA per LED
„ 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
„ 12-lead TDFN 3mm x 3mm package
APPLICATION
„ LCD Display Backlight
„ Cellular Phones
„ Digital Still Cameras
„ Handheld Devices
ORDERING INFORMATION
Part
Number
Quantity
Package per Reel
CAT3603HV2 TDFN-12 3x3 2000
Green*
* Lead Finish Matte-Tin
Package
Marking
HABB
For Ordering Information details, see page 11.
DESCRIPTION
The CAT3603 is a charge pump LED driver
operating in either 1x (LDO) mode or 1.5x fractional
mode regulating current through each of the 3 LED
pins. Operation at a constant switching frequency of
1MHz allows the use of very small value ceramic
capacitors.
The CAT3603 drives 3 white LEDs in parallel and
provides tightly matched regulated current to achieve
uniform brightness in LCD backlighting applications.
An external resistor, RSET, controls the output
current level. The device can deliver up to 30mA over
an input voltage supply range from 3V to 5.5V,
making it ideal for battery-powered applications
LED dimming can be accomplished using several
methods; using a DC voltage to set the RSET pin
current, applying a PWM signal on the EN pin, or
adding a switched resistor in parallel with RSET. The
EN input pin allows the device to be placed in power-
down mode with “near-zero” quiescent current.
The device is available in the tiny 12-lead thin DFN
3mm x 3mm package with a max height of 0.8mm.
PIN CONFIGURATION
12-lead TDFN 3mm (Top view)
TYPICAL APPLICATION CIRCUIT
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Note: Unused LED channels must be connected to VOUT.
1 Doc. No. 5017 Rev. C

CAT3603
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CAT3603
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, VOUT, LEDx voltage
EN voltage
RSET voltage
Junction Temperature Range
Storage Temperature Range
Lead Temperature
ESD Ratings
Human Body Model (HBM)
Machine Model (MM)
Rating
-0.3 to 7.0
-0.3 to VIN
-0.3 to VIN
-40 to +150
-65 to +160
300
2000
200
Unit
V
V
V
°C
°C
°C
V
V
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
Ambient Temperature Range
Input, Output, Bucket Capacitors
ILED per LED pin
IOUT Total Output Current
Range
3 to 5.5
-40 to +85
1 ±20% typical
0 to 31
0 to 150
Unit
V
°C
µF
mA
mA
Typical application circuit with external components are shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
VIN = 3.6V, EN = High, ambient temperature of 25ºC (over recommended operating conditions unless specified
otherwise).
Symbol
IQ
VRSET
ILED
ILED-ACC
ILED-DEV
ROUT
fOSC
TDROPOUT
IEN
VEN
ISC
ILIM
TSD
THYS
VUVLO
Parameter
Quiescent Current
RSET Regulated Voltage
Programmed LED Current
LED Current Accuracy
LED Channel Matching
Output Resistance
(Open Loop)
Charge Pump Frequency
1x to 1.5x Mode Transition
Dropout Delay
Input Leakage Current
High Detect Threshold
Low Detect Threshold
Short Circuit Output Current
Maximum Input Current
Thermal Shutdown
Thermal Hysteresis
Undervoltage lock out (UVLO) threshold
Conditions
VEN = 0V, shutdown mode
1x Mode, No Load
1.5x Mode, No Load
IRSET = 5µA
IRSET = 37µA
IRSET = 78µA
0.5mA ILED 3mA
3mA ILED 30mA
(ILED – ILEDAVG) / ILEDAVG
1x Mode
1.5x Mode, IOUT = 100mA
On Input EN
On Input EN
VOUT = GND
VOUT > 1V
Min
1.17
0.8
0.4
0.4
30
200
Typ
0.1
0.4
2.7
1.2
2.4
15.0
30.0
±15
±5
±3
1.4
6.5
1.0
0.6
0.8
0.7
45
400
150
20
2
Max
1
1
5
1.23
2.5
10
1.3
0.9
Unit
µA
mA
mA
V
mA
mA
mA
%
%
%
MHz
ms
1 µA
1.3 V
V
60 mA
600 mA
ºC
ºC
V
Doc. No. 5017 Rev. C
2 © 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice


Features www.DataSheet4U.com CAT3603 3-Channel LED Driver in 3x3mm Package FEATURES „ „ „ „ „ „ „ „ „ „ „ „ Drive s up to 3 LEDs Current setting resistor Compatible with supply voltage of 3V t o 5.5V Power efficiency up to 91% Outpu t Current up to 30mA per LED Fractional pump 1x/1.5x Low noise input ripple Fi xed High Frequency Operation 1MHz “Ze ro” Current Shutdown Mode Soft start and current limiting Short circuit prot ection 12-lead TDFN 3mm x 3mm package DESCRIPTION The CAT3603 is a charge pum p LED driver operating in either 1x (LD O) mode or 1.5x fractional mode regulat ing current through each of the 3 LED p ins. Operation at a constant switching frequency of 1MHz allows the use of ver y small value ceramic capacitors. The C AT3603 drives 3 white LEDs in parallel and provides tightly matched regulated current to achieve uniform brightness i n LCD backlighting applications. An ext ernal resistor, RSET, controls the outp ut current level. The device can deliver up to 30mA over an input voltage suppl.
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