Features and Benefits
- Constant 800kHz Switching Frequency
- Wide Operating Voltage Range: 3V to 25V
- High Efficiency 0.1Ω/3A Switch
- 1.2V Feedback Reference Voltage
- ±2% Overall Output Voltage Tolerance
- Uses Low Profile Surface Mount External Components
- Low Shutdown Current: 11µA
- Synchronizable from 1MHz to 1.4MHz
- Current-Mode Control
- Constant Maximum Switch Current Rating at All Duty Cycles*
- Available in a Small Thermally Enhanced TSSOP-16 Package
The LT3436 is an 800kHz monolithic boost switching regulator. A high efficiency 3A, 0.1Ω switch is included on the die together with all the control circuitry required to complete a high frequency, current-mode switching regulator. Current-mode control provides fast transient response and excellent loop stability.
New design techniques achieve high efficiency at high switching frequencies over a wide operating range. A low dropout internal regulator maintains consistent performance over a wide range of inputs from 24V systems to Li- Ion batteries. An operating supply current of 1mA maintains high efficiency, especially at lower output currents. Shutdown reduces quiescent current to 11µA. Maximum switch current remains constant at all duty cycles. Synchronization capability allows an external logic level signal to increase the internal oscillator from 1MHz to 1.4MHz.
Full cycle-by-cycle switch current limit protection and thermal shutdown are provided. High frequency operation allows the reduction of input and output filtering components and permits the use of tiny chip inductors. The LT3436 is available in an exposed pad, 16-pin TSSOP package.
*Patent numbers 6,535,042; 6,611,131; 6,498,466
- DSL Modems
- Portable Computers
- Battery-Powered Systems
- Distributed Power
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.
Evaluation Kits (1)
Demonstration circuit 533 is an 800kHz adjustable output boost regulator featuring the LT3436. This current-mode control monolithic (switch included) converter has a wide operating supply voltage of 3V to 25V and a minimum peak switch current rating of 3A, though the demo board has a reduced input voltage range of 3.2V to 12V. It provides 12V at 550mA from a 3.3V input and 12V at 900mA from a 5V input.
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.