Datasheet

UNISONIC TECHNOLOGIES CO., LTD
L3060
Preliminary
CMOS IC
30V/500mA HIGH DIMMING
RATIO LED CONSTANT
CURRENT DRIVER

DESCRIPTION
The UTC L3060 is a continuous conduction mode inductive
step-down converter, designed for driving single or multiple series
connected LEDs efficiently from a voltage source higher than the
total LEDs chain voltage. The device provides an externally
adjustable output current of up to 500mA for a single LED. A
dedicated DIM pin accepts either a DC voltage (0.5V~2.5V)
dimming or a wide range of pulsed dimming. Applying a voltage of
0.3V or lower to the DIM pin turns the output off and switches the
device into a low current standby state.
The UTC L3060 has a build-in power switch, based on different
input voltage, UTC L3060 can drive several 1W or 2W LEDs.

FEATURES
* 5V~30V input voltage range
* Simple low parts count
* Typical ±3% output current accuracy
* Up to 500mA output current
* Single DIM pin on/off and brightness control using DC voltage or
PWM signal
* High efficiency up to 97%
* Adjustable constant LED current
* Protection features:
LED open-circuit protection
LED short-circuit protection
Internal thermal shutdown protection.

ORDERING INFORMATION
Ordering Number
L3060G-AF5-R
Package
SOT-25
Packing
Tape Reel
L3060G-AF5-R
(1)Packing Type
(1) R: Tape Reel
(2)Package Type
(2) AF5: SOT-25
(3)Green Package
(3) G: Halogen Free and Lead Free
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Copyright © 2015 Unisonic Technologies Co., Ltd
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L3060

Preliminary
CMOS IC
MARKING
5
4
3060G
1

2
3
PIN CONFIGURATION
VIN
CS
4
5

2
3
SW
GND
DIM
PIN DESCRIPTION
PIN NO.
1
2
3
4
5

1
PIN NAME
SW
GND
DIM
CS
VIN
DESCRIPTION
Switch output.
Signal and power ground.
Enable switch, analog and PWM dimming input.
Current sense input, sampling resistor connected between CS and VIN
Input supply pin. Must be locally bypassed.
BLOCK DIAGRAM
+
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L3060

Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VIN
-0.3~40
V
Drain Voltage of the Internal Power Switch
SW
-0.3~40
V
Current Sense Input (Respect to VIN)
CS
+0.3~(-6.0)
V
Logic Level Dimming Input
DIM
-0.3~6
V
Switch Output Current
ISW
0.6
A
Power Dissipation
PD
0.2
W
ESD Susceptibility (Note 2)
ESD
2
KV
Operation Junction Temperature Range
TJ
-40~150
°C
Storage Temperature
TSTG
-55~150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. Human body model, 100pF capacitor discharged through a 1.5kΩ resistor.

RECOMMENDED OPERATING RANGE
PARAMETER
VDD Supply Voltage
Operating Temperature

SYMBOL
VIN
TOPR
RATINGS
0~30
-40~+85
UNIT
V
°C
SYMBOL
θJA
RATINGS
300
UNIT
℃/W
THERMAL DATA
PARAMETER
Junction to Ambient
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
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (Note 1, 2)
(The following specifications apply for VIN=12V, TA=25°C, unless specified otherwise.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
Input Voltage
VIN
5
Under Voltage Lock Out
VUVLO
VIN Falling
4.7
UVLO Hysteresis
VUVLO, HYS VIN Rising
100
Current Sense
Mean Current Sense Threshold Voltage
VCS
VIN-VCS
97
100
Sense Threshold Hysteresis
VCS_HYS
±15
CS Pin Input Current
ICS
VIN-VCS=50mV
8
Operating Frequency
Maximum Operation Frequency
FSW
Operating Current
Quiescent Supply Current with Output Off
IOFF
VDIM<0.3V
100
DIM Input
Internal Supply Voltage
VDIM
DIM Floating
5
DIM Input Voltage High
VDIM_H
2.5
DIM Input Voltage Low
VDIM_L
DIM Pull Up Resistor to Internal Supply Voltage
RDIM
150
DIM Input Leakage to Ground
IDIM_L
VDIM=0
33
DIM Brightness Dimmer
DC Brightness Control Range
VDIM_DC
0.5
Max. DIM Frequency
fDIM
fOSC=500kHz
Duty Cycle Range of Low Frequency Dimming
fDIM=100Hz
0.05%
DPWM_LF
Brightness Control Ratio
2000:1
Duty Cycle Range of High Frequency Dimming
fDIM=20KHz
10%
DPWM_HF
Brightness Control Ratio
10:1
Output Power Switch
SW On Resistance
RSW
0.8
Continuous SW Current
ISWmean
SW Leakage Current
ILEAK
0.5
Thermal Shutdown
Thermal Shutdown Threshold
TSD
150
Thermal Shutdown hysteresis
TSD-hys
20
Notes: 1. Typical parameters are measured at 25˚C and represent the parametric norm.
2. Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MAX
30
UNIT
V
V
mV
103
mV
%
μA
1
MHz
μA
0.3
2.5
50
1
V
V
V
KΩ
μA
V
kHz
1
0.5
5
Ω
A
µA
°C
°C
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L3060
CMOS IC
TYPICAL APPLICATION CIRCUIT
VIN (DC)=5V~30V
C1
2.2µF
D1
5
SW 1
VIN
CS
L1
4
47µH
UTC
L3060
2
GND
RS=0.15Ω

Preliminary
DIM 3
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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