LTC7810: High voltage switching regulator IC

March 6, 2018 | 02:30
LTC7810: High voltage switching regulator IC
LTC7810: High voltage switching regulator IC
For higher voltage applications, the choice of switching regulator solutions is somewhat limited. The TLC7810 step-down regulator IC from Analog Devices however operates with a Vin ranging from 4.5V to 140 V and provides 2-phase control signals to drive two N-channel power MOSFET half-bridges providing an output voltage level from 1V to 60V.

In addition there are some subtleties of the IC design that make this an attractive proposition: Its two very low impedance output drive signals can be configured to supply 6, 8 or 10 V signals, allowing the use of logic-level or standard threshold external FETs. Low control losses together with logic-level power MOSFETs can achieve efficiencies of up to 96%. The LTC7810 also includes an additional EXTVCC LDO that can supply DRVCC via a lower voltage supply to achieve better efficiency.

The switching frequency is programmable between 50 and 750 kHz. The switching waveforms can be configured for: continuous, pulse-skipping and a burst mode. Switching signals can often be the source of unwanted EMI, for sensitive applications a spread-spectrum switching mode can be selected. This regulator IC can be used to build a two-phase switching regulator supplying an output power well above 1 kW and with low output ripple.
The LTC7810 is available in a 48-pin LQFP(7 x 7 mm) outline.
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