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LTC7820
Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller
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Overview
Features and Benefits
- Low Profile, High Power Density, Capable of 500W+
- Soft Switching: 99% Peak Efficiency and Low EMI
- VIN Max for Voltage Divider (2:1): 72V
- VIN Max for Voltage Doubler (1:2)/Inverter (1:1): 36V
- Wide Bias VCC Range: 6V to 72V
- Soft Startup into Steady State Operation
- 6.5V to 40V EXTVCC Input for Improved Efficiency
- Input Current Sensing and Overcurrent Protection
- Wide Operating Frequency Range: 100kHz to 1MHz
- Output Short-Circuit/OV/UV Protections with Programmable Timer and Retry
- Thermally Enhanced 28-Pin 4mm × 5mm QFN Package
Product Details
The LTC7820 is a fixed ratio high voltage high power switched capacitor/charge pump controller. The device includes four N-channel MOSFET gate drivers to drive external power MOSFETs in voltage divider, doubler or inverter configurations. The device achieves a 2:1 step-down ratio from an input voltage as high as 72V, a 1:2 step-up ratio from an input voltage as high as 36V, or a 1:1 inverting ratio from an input voltage up to 36V. Each power MOSFET is switched with 50% duty cycle at a constant pre-programmed switching frequency. System efficiency can be optimized to over 99%. The LTC7820 provides a small and cost effective solution for high power, non-isolated intermediate bus applications with fault protection.
The LTC7820 switching frequency can be linearly programmed from 100 kHz to 1MHz. The device is available in a thermally enhanced 28-lead QFN package with some no-connect pins for high voltage compatible pin spacing.
Applications
- Bus Converters
- High Power Distributed Power Systems
- Communications Systems
- Industrial Applications
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation
User Guides (1)
Tools & Simulations
LTspice
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Reference Materials
Product Selector Card (1)
Switched Capacitor and Hybrid DC/DC Supplies
High Power, High Density Switched Capacitor & Hybrid Converter
Press Releases (1)
Technical Articles (2)
Design Resources
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PCN-PDN Information
Support & Discussions
LTC7820 Discussions
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.
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