LTC7820 High-Power Charge Pump DC/DC Controllers

Analog Devices' LTC7820 are fixed ratio high voltage, high-power switched capacitor/charge pump DC/DC controllers. These controllers include four N-channel MOSFET gate drivers to drive external power MOSFETs in voltage divider, doubler, or inverter configurations. The LTC7820 achieve a 2:1 stepdown ratio from an input voltage as high as 72 V, a 1:2 step-up ratio from an input voltage as high as 36 V, or a 1:1 inverting ratio from an input voltage up to 36 V. 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 switching frequency can be linearly programmed from 100 kHz to 1 MHz. The devices are available in a 28-pin QFN package and have a temperature range of -40°C to +125°C (T_J). The LTC7820 are ideal for high-power, non-isolated intermediate bus applications with fault protection.

Features
Step-up/step-down boost/buck Low profile, high power density, capable of 500 W+ Soft switching: 99% peak efficiency and low EMI Soft startup into steady state operation Current limit, enable, frequency control, power good, soft start Voltage supply: 6 V to 72 V		VIN max for voltage divider (2:1): 72 V VIN max for voltage doubler (1:2)/inverter (1:1): 36 V 6.5 V to 40 V EXTVCC input for improved efficiency Temperature operating range: -40°C to +125°C (TJ) Package/case:  28-QFN (4x5)
Applications
High-power distributed power systems Bus converters		Communications systems Industrial