LTC3202 - Low Noise, High Efficiency Charge Pump for White LEDs
Datasheet Documentation
Datasheet
Reliability Data
LT Journal
cad_symbol
Overview

Features

 

Typical Application

LTC3202 Typical Application
LTC3202 Typical Application

Description

The LTC3202 is a low noise, constant frequency charge pump DC/DC converter that uses fractional conversion to increase efficiency in white LED applications. The part can be used to produce a regulated voltage or current of up to 125mA from a 2.7V to 4.5V input. Low external parts count (two flying capacitors and two small bypass capacitors at VIN and VOUT) make the LTC3202 ideally suited for small, battery-powered applications.

An internal 2-bit DAC allows LED current to be adjusted for LED brightness control. The LTC3202 also has thermal shutdown protection and can survive a continuous shortcircuit from VOUT to GND. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1µA.

The LTC3202 is available in the 10-pin MSOP and 3mm x 3mm DFN packages.

Packaging

3x3 DFN-10,MS-10

LTC3202 Package Drawing
LTC3202 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LTC3202EDD#PBF DFN 10 E $2.93 $2.00
LTC3202EDD#TRPBF DFN 10 E $2.10
LTC3202EMS#PBF MSOP 10 E $2.25 $1.90
LTC3202EMS#TRPBF MSOP 10 E $1.96
LTC3202EMS MSOP 10 E $4.50 $3.80
LTC3202EMS#TR MSOP 10 E $3.92
LTC3202EDD DFN 10 E $5.86 $4.00
LTC3202EDD#TR DFN 10 E $4.20
* 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.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


Part Number Description Price Documentation
DC395A LTC3202EMS Demo Board | Fractional Charge Pump LED Driver, 6 Paralleled LEDs, 2.7V ≤ VIN ≤ 4.5V, VLED up to 4V @ 120mA Contact Factory
DC633A LTC3202EDD | High Efficiency White LED Driver Contact Factory