Preliminary Datasheet
LP3360
4-Channel Constant Current White LED Driver
General Description
The LP3360 is a low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. It
supports 4 white LEDs with regulated constant current for
uniform intensity. The LP3360 maintains low dropout
current regulators. The LP3360 requires a 45mV dropout
at a 20mA load on each output to match the LED brightness.
The brightness of LEDs can be tuned through a pulse width
modulated signal at the PWM pin,the PWM frequency from
200Hz to 10KHz and the Duty from 0 to 100%.
The LP3360 is available in a SOT23-6 or MSOP-8
package.
Features
2.7V to 6V Input Voltage
20mA maxim sink current
PWM tuned LED brightness through PWM pin
Soft Start Function
Built-in Thermal Protection
I
Q
<1uA in Shutdown
SOT23-6 or MSOP-8 Package
RoHS Compliant and 100% Lead (Pb)-Free
Typical Application Circuit
Vin
6
5
4
D2
GND
3
LP3360
D4
D3
PW M
1
PWM
Order Information
LP3360 -
□ □ □
F: Pb-Free
Package Type
B6: SOT23-6
MS:MSOP-8
Marking Information
Please see website.
Applications
LCD Panel
Cellular and Smart mobile phone
PDA/DSC
PMP
LP3360 – Ver. 1.2 Datasheet
Feb.-2008
2
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Preliminary Datasheet
Functional Pin Description
P a c k a g e Ty p e
Pin Configurations
LP3360
SOT23-6
MSOP-8
PIN
NAME
DESCRIPTION
SOT23-6
1
2
3
4
5
6
MSOP-8
2
1,4
5
6
7
8
3
PWM/EN
LED4
LED3
LED2
LED1
VDD
Device enable (active high).
LED 1 cathode terminal
LED2 cathode terminal
LED3 cathode terminal
LED3 cathode terminal
Power Supply
GND/PGND Ground
Function Block Diagram
LP3360 – Ver. 1.2 Datasheet
Feb.-2008
Page 2 of 6
Preliminary Datasheet
Absolute Maximum Ratings
LP3360
Input Voltage to GND (V
INA,
V
INB)
---------------------------------------------------------------------------- 6V
EN/ISET to GND Voltage (V
en/set
) ----------------------------------------------------------- 0.3V to V
in
+0.3V
Maximum DC Output Current(Iout) ----------------------------------------------------------------------- 150mA
Operating Junction Temperature Range (T
J
) ---------------------------------------------------- 40
℃
to 150
℃
Maximum Soldering Temperature (at leads, 1 0sec) ----------------------------------------------------- 300
℃
Thermal Information
Maximum Power Dissipation (P
D
) SOT23-6 -------------------------------------------------------------- 0.25W
Maximum Power Dissipation (P
D
) MSOP-8 -------------------------------------------------------------- 1.25W
Thermal Resistance
(JA)
------------------------------------------------------------------------------------ 50
℃
/W
Electrical Characteristics
(Over recommended operating conditions unless specified otherwise) V
INA
=3.6V,EN=High, T
A
=25
℃
)
Symbol
V
IN
V
OUT
I
Q
I
SHDN
I
LED-ERR
I
LED-LED-ERR
V
EN(L)
V
EN(H)
Parameter
Input Voltage
Output Voltage Range
Quiescent Current
Shutdown Current
LED Current Accuracy
LED Channel Matching
Enable Threshold Low
Enable Threshold High
Conditions
LP3360
Min.
Typ.
3
0.6
260
0.1
19
-3
2
Max.
5.5
V
INB
350
1
21
3
0.5
Unit
V
V
uA
µA
mA
%
V
V
No Load,1X mode
ENB = GND
3mA< I
LED<
30mA
Any two channel mismatch
20
LP3360 – Ver. 1.2 Datasheet
Feb.-2008
Page 3 of 6
Preliminary Datasheet
Typical Operating Characteristics
LP3360
LP3360 – Ver. 1.2 Datasheet
Feb.-2008
Page 4 of 6
Preliminary Datasheet
Packaging Information
LP3360
LP3360 – Ver. 1.2 Datasheet
Feb.-2008
Page 5 of 6
