Datasheet

Table Of Contents
November 2009 Doc ID 13003 Rev 6 1/42
42
L5980
0.7 A step-down switching regulator
Features
0.7 A DC output current
2.9 V to 18 V input voltage
Output voltage adjustable from 0.6 V
250 kHz switching frequency, programmable
up to 1 MHz
Internal soft-start and inhibit
Low dropout operation: 100% duty cycle
Voltage feed-forward
Zero-load current operation
Overcurrent and thermal protection
VFQFPN8 3 x 3 mm package
Applications
Consumer: STB, DVD, DVD recorder, car
audio, LCD TV and monitors
Industrial: chargers, PLD, PLA, FPGA
Networking: XDSL, modems, DC-DC modules
Computer: optical storage, hard disk drive,
printers, audio/graphic cards
LED driving
Description
The L5980 is step-down switching regulator with
1 A (min.) current limited embedded power
MOSFET, so it is able to deliver in excess of 0.7 A
DC current to the load depending on the
application condition.
The input voltage can range from 2.9 V to 18 V,
while the output voltage can be set starting from
0.6 V to V
IN
. Having a minimum input voltage of
2.9 V, the device is suitable also for 3.3 V bus.
Requiring a minimum set of external components,
the device includes an internal 250 kHz switching
frequency oscillator that can be externally
adjusted up to 1 MHz.
The VFQFPN8 package with exposed pad allows
reducing the R
thJA
down to approximately
60 °C/W.
VFQFPN8 3 x 3 mm
Figure 1. Application circuit
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Summary of content (42 pages)