LTC3429 - 600mA, 500kHz Micropower Synchronous Boost Converter with Output Disconnect

Features

  • Click Here For LTC3429 Evaluation Kits
  • Up to 96% Efficiency
  • True Output Load Disconnect
  • Inrush Current Limiting and Internal Soft-Start
  • Low Voltage Start-Up: 0.85V
  • Automatic Burst Mode® Operation with IQ ~ 20µA
  • Continuous Switching at Light Loads (LTC3429B)
  • Internal Synchronous Rectifier
  • Current Mode Control with Internal Compensation
  • Short-Circuit Protection
  • 500kHz Fixed Frequency Switching
  • Input Range: 0.5V to 4.4V
  • Output Range: 2.5V to 4.3V (Up to 5V with Schottky)
  • Shutdown Current: <1µA
  • Antiringing Control Minimizes EMI
  • Tiny External Components
  • Low Profile (1mm) SOT-23 Package

Typical Application

LTC3429
LTC3429
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Description

The LTC3429/LTC3429B are high efficiency synchronous, fixed frequency, step-up DC/DC converters with true output load disconnect, inrush current limiting and softstart in a low profile 6-lead ThinSOT package. These devices are capable of supplying 100mA from a single AA cell input or 250mA from a 2-cell AA with a 3.3V output.

A switching frequency of 500kHz minimizes overall solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. Current mode PWM control with internal compensation reduces external parts count thereby saving critical board real estate. The LTC3429 shifts automatically to power saving Burst Mode operation at light loads while the LTC3429B features continuous switching at light loads. Antiringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode.

The devices also feature low shutdown current of under 1µA. The true output disconnect feature allows the output to be completely discharged in shutdown. It also limits the inrush of current during start-up, minimizing surge currents seen by the input supply.

 

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Packaging

ThinSOT

LTC3429
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3429BES6 SOT 6 E $2.38   View
LTC3429BES6#PBF SOT 6 E $2.38   View
LTC3429BES6#TR SOT 6 E $2.38 $2.01 View
LTC3429BES6#TRM SOT 6 E $2.38 $2.03 View
LTC3429BES6#TRMPBF SOT 6 E $2.38 $2.03 View
LTC3429BES6#TRPBF SOT 6 E $2.38 $2.01 View
LTC3429ES6 SOT 6 E $2.38   View
LTC3429ES6#PBF SOT 6 E $2.38   View
LTC3429ES6#TR SOT 6 E $2.38 $2.01 View
LTC3429ES6#TRM SOT 6 E $2.38 $2.03 View
LTC3429ES6#TRMPBF SOT 6 E $2.38 $2.03 View
LTC3429ES6#TRPBF SOT 6 E $2.38 $2.01 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
DC559A-A LTC3429ES6 | 500kHz, Synchronous Boost Converter, 1.0 to 3.3Vin, 3.3Vout @ 90mA $100.00
DC559A-B LTC3429BES6 | 500kHz, Synchronous Boost Converter, 1.0 to 3.3Vin, 3.3Vout @ 90mA $100.00
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Applications

  • MP3 Players
  • Digital Cameras
  • LCD Bias Supplies
  • Handheld Instruments
  • Wireless Handsets
  • GPS Receivers
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Simulate

To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.

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