Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3814-5
Edited by the Electronicstalk Editorial
Team on 14 December 2007
Controller cuts boost convertors down to
size
The LTC3814-5 can regulate output voltages up to 60V and has powerful 1ohm onboard dual N-channel MOSFET gate drivers that are capable of supplying high currents.
Linear Technology has released a synchronous no-sense-resistor step-up switching regulator controller that eliminates the boost diode and the heatsink normally required in medium- to high-power nonsynchronous boost convertors The LTC3814-5 can regulate output voltages up to 60V and has powerful 1ohm onboard dual N-channel MOSFET gate drivers that are capable of supplying high currents to slew large MOSFET gates quickly
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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This minimises transition losses and allows paralleling of MOSFETs for higher current applications.
The LTC3814-5 can regulate a 24V at 4A output with up to 97% efficiency from a 4.5 to 14V input source.
Applications include automotive, avionics, telecom, networking equipment, servers, industrial control systems and basestations where a step-up DC/DC convertor must deliver high power with low heat dissipation in a small solution size.
The LTC3814-5 uses current mode control and maintains +/-0.875% reference voltage accuracy over an operating temperature range of -40 to +85C.
In addition, this part uses a constant-off-time peak current control architecture and has a high bandwidth (25MHz) error amplifier that provides very fast line and load transient response.
The constant-off-time current mode architecture provides accurate cycle-by-cycle current limit protection; a feature that is essential to protect the high voltage output from overcurrent conditions.
Furthermore, the operating frequency is selected by an external resistor from 100kHz to 1MHz which is also compensated for input-voltage variations and can be synchronised to an external clock for noise sensitive applications.
The LTC3814-5 has programmable soft-start, undervoltage lockout on the driver supply, output overvoltage protection and a power good signal that monitors the output voltage.
The LTC3814-5 is offered in a thermally enhanced TSSOP-16 package.
Pricing for 1000-piece quantities begins at US $3.50 each. Request a free brochure from Linear Technology Corp ...
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