LTC3200

PRODUCTION

Low Noise, Regulated Charge Pump DC/DC Converters

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Overview

  • Low Noise Constant Frequency Operation
  • Output Current: 100mA
  • Fixed 5V ±4% Output (LTC3200-5) or ADJ
  • VIN Range: 2.7V to 4.5V
  • Automatic Soft-Start Reduces Inrush Current
  • 2MHz Switching Frequency
  • No Inductors
  • ICC < 1µA in Shutdown
  • Available in 8-Pin MSOP (LTC3200) and Low Profile (1mm) 6-Pin ThinSOT™ (LTC3200-5) Packages

The LTC3200/LTC3200-5 are low noise, constant frequency switched capacitor voltage doublers. They produce a regulated output voltage from a 2.7V to 4.5V input with up to 100mA of output current. Low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) make the LTC3200/LTC3200-5 ideally suited for small, battery-powered applications.

A new charge-pump architecture maintains constant switching frequency to zero load and reduces bith output and input ripple. The LTC3200/LTC3200-5 have thermal shutdown capability and can survive a continuous short-circuit from VOUT to GND. Built-in soft-start circuitry prevents excessive inrush curreent during start-up.

High switching frequency enables the use of small ceramic capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to <1µA.

The LTC3200 is available in an 8-pin MSOP package and the LTC3200-5 is available in a 6-pin SOT-23.

Applications

  • Li-Ion Battery Backup Supplies
  • Local 3V to 5V Conversion
  • Smart Card Readers
  • PCMCIA Local 5V Supplies
  • White LED Backlighting
LTC3200
Low Noise, Regulated Charge Pump DC/DC Converters
Regulated 5V Output from a 2.7V to 4.5V Input Output Ripple Voltage vs Load Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital to Analog Converters (DACs) 2
LTC2641
PRODUCTION 16-/14-/12-Bit VOUT DACs in 3mm × 3mm DFN
LTC2631
PRODUCTION Single 12-/10-/8-Bit I2C VOUT DACs with 10ppm/°C Reference
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3200
  • LTC3200-5
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC366A

LTC3200EMS8 Demo Board | Regulated Charge Pump White LED Driver, 2.7V ≤ VIN ≤ 4.5V, IOUT Drives 6 Parallel LEDs

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Product Details

Demonstration Circuit 366A is a low noise constant frequency regulated charge pump featuring the 100mA output current LTC3200. The demo board accepts a 2.7V to 4.5V input voltage and drives six white LEDs in parallel, resulting in 16.6mA per LED. Ballast resistors are employed to provide more uniform light intensity fromr the paralleled LEDs. 
DC366A
LTC3200EMS8 Demo Board | Regulated Charge Pump White LED Driver, 2.7V ≤ VIN ≤ 4.5V, IOUT Drives 6 Parallel LEDs
DC366A - Schematic

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