tm
TE
CH
T6335A
Constant Current Regulator
FEATURES
• Constant Current Regulator
• Constant Current Option :
150/210/225/240/260/280/300/320/350 mA
• Low Dropout Voltage
• Low 0.1 uA Shutdown Supply Current
• SOT-89 and TO-252
lead-free
Package
• ESD Human Body Mode Over 5KV
• 2.7V to 5V Supply Voltage Range
• Build in Thermal Protect 160
°
C
GENERAL DESCRIPTION
The T6335A low-dropout bias supply for
white LED is a high-performance used in
conventional white LED designs.
The T6335A has lower bias variation with
supply voltage variation, significantly
lower dropout voltage Low Shutdown
Current in some applications, significantly
improved efficiency from DC 2.7V to 5V.
The T6335A is available in SOT-89 and
TO-252 lead-free package.
APPLICATIONS
• Flash Light
• Lighting
• Portable Communication Devices
• Handheld Electronics
• DC/DC LED driver
PART NUMBER EXAMPLES
Part no.
T6335A-350AXG
T6335A-350AWG
Current
350mA
350mA
Package type
SOT-89
TO-252
TYPICAL APPLICATION CIRCUITS
V
IN
2.7V~5V
T6335A-150AXG
T6335A-150AWG
150mA
150mA
SOT-89
TO-252
PIN ARRANGEMENT
(Top view)
SOT-89
TO-252
OUT
T6335A
VDD
GND
OUT
GND
VDD
OUT
GND
VDD
TM Technology Inc. reserves the right
to change products or specifications without notice.
P. 1
Publication Date: MAR. 2007
Revision: A
tm
SYMBOL
OUT
VSS
VDD
TE
CH
T6335A
PIN DESCRIPTION
Pin no.
1
2
3
DESCRIPTION
LED Cathode Connection.
Ground
Power supply
ABSOLUTE MAXIMUM RATINGS
Parameter
Voltage on any pin relative to GND
Operating Temperature Rang
Maximum Soldering Temperature (at leads, 10 sec)
Storage Temperature Rang
Continuous Power Dissipation ( T
A
= +70°C )
Symbol
V
IN
T
A
T
LEAD
T
S
Value
-0.3 to 6
-40 to +85
300
-65 to +150
1
Unit
V
°C
°C
°C
W
Electrical Characteristics
(Typical values are at TA =25°C)
Symbol
V
DD
Description
Operating voltage range
Conditions
VDD is power supply input
Min. Typ. Max
2.7
329
300
282
263
244
225
211
197
141
350
320
300
280
260
240
225
210
150
160
0.2
1
5
371
339
318
296
275
254
238
222
159
Unit
V
mA
mA
mA
mA
mA
mA
mA
mA
mA
°C
uA
T6335A-350
T6335A-320
T6335A-300
T6335A-280
I
LED
Maximum LED sink current
VDD = 4.5V
VLED =3.5V
T6335A-260
T6335A-240
T6335A-225
T6335A-210
T6335A-150
T
TP
I
LSD
Thermat Protect
LED leakage current in shutdown VDD = GND, VLED = 5V
TM Technology Inc. reserves the right
to change products or specifications without notice.
P.2
Publication Date: MAR. 2007
Revision: A
tm
Test Circuit
VDD
TE
CH
T6335A
Typical Operating Characteristics
OUT
T6335A
VDD
GND
VDD VS. Iout Curve
400
350
350mA
300mA
280mA
260mA
240mA
225mA
Iout(mA)
300
250
200
150
3
3.2
3.4
3.6
3.8
VDD(V)
4
4.2
4.4
4.6
4.8
5
TM Technology Inc. reserves the right
to change products or specifications without notice.
P.3
Publication Date: MAR. 2007
Revision: A