LTC7899
RECOMMENDED FOR NEW DESIGNS140V, Low IQ, Negative to Positive Synchronous Boost Controller with 10V Gate Drive
- Part Models
- 2
- 1ku List Price
- Starting From $5.03
Overview
- Converts Negative Input to Positive Output Regulated with Respect to Ground
- Wide |VIN |+VOUT Range: 4V to 135V (140V ABS MAX)
- Internal Feedback Level Shifter for Easy Output Voltage Programming with Two Resistors
- Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE, 14V ABS MAX)
- Adjustable Driver Voltage UVLO
- Adaptive or Resistor-Adjustable Dead Times
- Split-Output Gate Drivers for Adjustable Turn-On and Turn-Off Driver Strengths
- Supports Positive Input to Positive Output Boost Up to 135V with Pass-Through
- Operation Down to 1V after Start-Up
- CLK Output for High Power PolyPhase Operation
- Spread Spectrum Frequency Modulation
- Programmable Frequency (100kHz to 2.5MHz)
- Phase-Lockable Frequency (100kHz to 2.5MHz)
- 28-Pin (4mm x 5mm) QFN Package
The LTC®7899 is a high performance DC/DC negative to positive switching regulator controller that drives all N-channel synchronous MOSFET stages and can operate from input voltages up to 135V. The positive output voltage can easily be programmed with only two resistors by using the integrated feedback level shifter. The LTC7899 can alternatively be configured as a step-up (Boost) operation with pass-through.
The gate drive voltage for the LTC7899 can be programmed from 5V to 10V to allow the use of logic or standard-level MOSFETs to maximize efficiency.
The low no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The user can adjust the dead times of the LTC7899 with external resistors for margin or to tailor the application for higher efficiency and allow for high frequency operation.
The LTC7899 additionally features spread spectrum operation, which significantly reduces the peak radiated and conducted noise on both the input and output supplies, making it easier to comply with electromagnetic interference (EMI) standards.
APPLICATIONS
- Industrial Power Systems
- Military/Avionics
- Telecommunications Power Systems
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC7899RUFD#PBF | 28-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC7899RUFD#TRPBF | 28-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice 1
Models for the following parts are available in LTspice:
- LTC7899
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
High Voltage Synchronous Negative to Positive Converter
Resources
High Voltage Synchronous Negative to Positive Converter