LTC3201 - 100mA Ultralow Noise Charge Pump LED Supply with Output Current Adjust

Features

• Click Here For LTC3201 Evaluation Kits
• Input Noise Filter Minimizes Supply Noise
• Constant Frequency Operation
• 3-Bit LED Current Control
• No Inductors
• Low Shutdown Current: I_IN < 1µA
• Output Current: 100mA
• V_IN Range: 2.7V to 4.5V
• 1.8MHz Switching Frequency
• Soft-Start Limits Inrush Current at Turn-On
• Short-Circuit and Overtemperature Protected
• Available in 10-Pin MSOP Package

Typical Application

Description

The LTC3201 is an ultralow noise, constant frequency, charge pump DC/DC converter specifically designed for powering white LEDs. The part produces a low noise boosted supply capable of supplying 100mA of output current. LED current is regulated for accurate and stable backlighting. A 3-bit DAC provides output current adjust for brightness control.

Low external parts count (one small flying capacitor and three small bypass capacitors) and small MSOP-10 package size make the LTC3201 ideally suited for space constrained applications. An input noise filter further reduces input noise,thus enabling direct connection to the battery. High switching frequency enables the use of small external capacitors.

The LTC3201 contains overtemperature protection and can survive an indefinite output short to GND. Internal soft-start circuitry also prevents excessive inrush current on start-up. A low current shutdown feature disconnects the load from V_IN and reduces quiescent current to less than 1µA.

Packaging

MS-10

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC3201EMS	MSOP	10	E	$2.25	$1.90	View
LTC3201EMS#PBF	MSOP	10	E	$2.25	$1.90	View
LTC3201EMS#TR	MSOP	10	E		$1.96	View
LTC3201EMS#TRPBF	MSOP	10	E		$1.96	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Evaluation Kits

Part Number	Description	Price
DC381A	LTC3201EMS | 100mA White LED (5) Power Supply	$75.00
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Applications

• White LED Backlighting
• Programmable Boost Current Source

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