LTH2 Marking, LT3465 datasheet(1/16 Pages) LINER

Part #	LT3465

Description	1.2MHz/2.4MHz White LED Drivers with Built-in Schottky in ThinSOT

PDF	16 Pages

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT3465/LT3465A

1

3465afa

, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a

trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners.

APPLICATIO S

FEATURES

TYPICAL APPLICATIO

DESCRIPTIO

■ Inherently Matched LED Current

■ Drives Up to Six LEDs from a 3.6V Supply

■ No External Schottky Diode Required

■ 1.2MHz Switching Frequency (LT3465)

■ 2.4MHz Switching Frequency Above AM Broadcast

Band (LT3465A)

■ VIN Range: 2.7V to 16V

■ VOUT(MAX) = 30V

■ Automatic Soft-Start (LT3465)

■ Open LED Protection

■ High Efficiency: 81% (LT3465) 79% (LT3465A)

Typical

■ Requires Only 0.22

µF Output Capacitor

■ Low Profile (1mm) SOT-23

1.2MHz/2.4MHz White

LED Drivers with Built-in

Schottky in ThinSOT

■ Cellular Phones

■ PDAs, Handheld Computers

■ Digital Cameras

■ MP3 Players

■ GPS Receivers

The LT

®3465/LT3465A are step-up DC/DC converters

designed to drive up to six LEDs in series from a Li-Ion cell.

Series connection of the LEDs provides identical LED

currents and eliminates the need for ballast resistors.

These devices integrate the Schottky diode required exter-

nally on competing devices. Additional features include

output voltage limiting when LEDs are disconnected, one-

pin shutdown and dimming control. The LT3465 has

internal soft-start.

The LT3465 switches at 1.2MHz, allowing the use of tiny

external components. The faster LT3465A switches at

2.4MHz. Constant frequency switching results in low input

noise and a small output capacitor. Just 0.22

µF is required

for 3-, 4- or 5-LED applications.

The LT3465 and LT3465A are available in the low profile

(1mm) 6-lead SOT-23 (ThinSOT

TM) package.

Figure 1. Li-Ion Powered Driver for Four White LEDs

SW

VOUT

VIN

LT3465/

LT3465A

CTRL

3465A F01a

10

Ω

C1

1

µF

C2

0.22

µF

C1, C2: X5R OR X7R DIELECTRIC

L1: MURATA LQH32CN220

L1

22

µH

3V TO 5V

SHUTDOWN

AND DIMMING

CONTROL

FB

GND

LED CURRENT (mA)

0

78

80

20

3465A F01b

76

60

70

68

66

64

62

72

74

5

10

15

82

VIN = 3.6V

4 LEDs

LT3465

LT3465A

Conversion Efficiency

Similar Description - LT3465

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	LT1931AIS5	426Kb / 12P	1.2MHz/2.2MHz Inverting DC/DC Converters in ThinSOT
	LT3462	233Kb / 8P	Inverting 1.2MHz/2.7MHz DC/DC Converters with Integrated Schottky in ThinSOT
	LT3462A	233Kb / 8P	Inverting 1.2MHz/2.7MHz DC/DC Converters with Integrated Schottky in ThinSOT
	LT3465A	344Kb / 16P	1.2MHz/2.4MHz White LED Drivers with Built-in Schottky in ThinSOT
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