L7986
3 A step-down switching regulator
Datasheet - production data
Applications
• Consumer: STB, DVD, DVD recorder, car
audio, LCD TV and monitors
• Industrial: PLD, PLA, FPGA, chargers
• Networking: XDSL, modems, DC-DC modules
HSOP8 exp. pad
VFDFPN10 3 x 3 mm
• Computer: optical storage, hard disk drive,
printers, audio/graphic cards
Features
• LED driving
• 3 A DC output current
Description
• 4.5 V to 38 V input voltage
The L7986/A is a step-down switching regulator
with a 3.7 A (minimum) current limited embedded
power MOSFET, so it is able to deliver up to 3 A
current to the load depending on the application
conditions. The input voltage can range from 4.5
V to 38 V, while the output voltage can be set
starting from 0.6 V to VIN. 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
DFN and the HSOP packages with exposed pad
allow reducing the RthJA down to 60 °C/W and 40
°C/W respectively.
• Output voltage adjustable from 0.6 V
• 250 kHz switching frequency, programmable
up to 1 MHz
• Internal soft-start and enable
• Low dropout operation: 100% duty cycle
• Voltage feed-forward
• Zero load current operation
• Overcurrent and thermal protection
• VFDFPN 3 x 3 - 10L and HSOP8 package
Figure 1. Application circuit
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