Features and Benefits
- Integrated Schottky Rectifier
- Fixed Frequency 1.2MHz/2.7MHz Operation
- Very Low Noise: 1mVP-P Output Ripple
- Low VCESAT Switch: 270mV at 250mA
- −5V at 100mA from 5V Input
- −12V at 30mA from 3.3V Input
- Low Input Bias Current GND Based FB Input
- Low Impedance (40Ω) 1.265V Reference Output
- High Output Voltage: Up to −38V
- Wide Input Range: 2.5V to 16V
- Uses Tiny Surface Mount Components
- Low Shutdown Current: <10µA
- Low Profile (1mm) SOT-23 (ThinSOT™) Package
- 8‑Lead DFN (2mm × 2mm × 0.75mm) Package, LT3462A Only
The LT3462/LT3462A are general purpose fixed frequency current mode inverting DC/DC converters. Both devices feature an integrated Schottky and a low VCESAT switch allowing a small converter footprint and lower parts cost. The LT3462 switches at 1.2MHz while the LT3462A switches at 2.7MHz. These high speeds enable the use of tiny, low cost and low height capacitors and inductors.
The LT3462/LT3462A operate in a dual inductor inverting topology that filters both the input and output currents.Very low output voltage ripple approaching 1mVP-P can be achieved when ceramic capacitors are used. Fixed frequency switching ensures a clean output free from low frequency noise typically present with charge pump solutions.The 40V switch allows a VIN to VOUT differential ofup to 38V for dual inductor topologies.
Both devices provide a low impedance 1.265V reference output to supply the feedback resistor network. A ground referenced, high impedance FB input allows high feedback resistor values without compromising output accuracy.
- CCD Bias
- LCD Bias
- GaAs FET Bias
- General Purpose Negative Voltage Supply
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.