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STMicroelectronics - 1.5A step-down switching regulator

Numéro de référence L5983
Description 1.5A step-down switching regulator
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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L5983 fiche technique
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L5983
1.5A step-down switching regulator
Features
1.5A DC output current
2.9V to 18V input voltage
Output voltage adjustable from 0.6V
250kHz switching frequency, programmable
up to 1MHz
Internal soft-start
Inhibit
Low dropout operation: 100% duty cycle
Voltage feed-forward
Zero load current operation
Over current and thermal protection
VQFN3x3-8L package
Applications
Consumer:
STB, DVD, DVD recorder, car audio, LCD TV
and monitors
Industrial:
Chargers, car battery, PLD, PLA, FPGA
Networking: XDSL, modems, DC-DC modules
Computer:
Optical storage, hard disk drive, printers,
audio/graphic cards
Figure 1. Application circuit
VFQFPN8 3x3
Description
The L5983 is a step down switching regulator with
2.0A current limited embedded power MOSFET,
so it is able to deliver an output current in excess
of 1.5A DC to the load.
The input voltage can range from 2.9V to 18V,
while the output voltage can be set starting from
0.6V to VIN. Having a minimum input voltage of
2.9V, the device is suitable for also for the 3.3V
bus.
Requiring a minimum set of external components,
the device includes an internal 250kHz switching
frequency oscillator that can be externally
adjusted up to 1MHz.
The QFN package with exposed pad allows
reducing the RthJA down to approximately
60°C/W.
October 2007
Rev 2
1/37
www.st.com
37

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