L7980 Datasheet PDF - STMicroelectronics
| Part Number | L7980 | |
| Description | 2A step-down switching regulator | |
| Manufacturers | STMicroelectronics | |
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There is a preview and L7980 download ( pdf file ) link at the bottom of this page. Total 30 Pages | ||
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L7980
2 A step-down switching regulator
Features
■ 2 A DC output current
■ 4.5 V to 28 V input voltage
■ 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
■ VFQFPN3x3-8L and HSOP8 package
Applications
■ Consumer:
STB, DVD, DVD recorder, car audio, LCD TV
and monitors
■ Industrial:
PLD, PLA, FPGA, chargers
■ Networking: XDSL, modems, DC-DC modules
■ Computer:
Optical storage, Hard disk drive, Printers,
Audio/graphic cards
■ LED driving
Figure 1. Application circuit
VFQFPN8 3x3
HSOP8 exposed pad
Description
The L7980 is a step down switching regulator with
2.5 A (minimum) current limited embedded power
MOSFET, so it is able to deliver up to 2 A current
to the load depending on the application
conditions.
The input voltage can range from 4.5 V to 28 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 QFN and the HSOP packages with exposed
pad allow reducing the RthJA down to 60 °C/W
and 40 °C/W respectively.
December 2010
Doc ID 15181 Rev 4
1/44
www.st.com
44
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L7980
2 Maximum ratings
Maximum ratings
Table 2. Absolute maximum ratings
Symbol
Parameter
Vcc
OUT
FSW, COMP, SYNCH
EN
Input voltage
Output DC voltage
Analog pin
Enable pin
FB
PTOT
TJ
Tstg
Feedback voltage
Power dissipation VFQFPN
at TA < 60°C
HSOP
Junction temperature range
Storage temperature range
Value
30
-0.3 to VCC
-0.3 to 4
-0.3 to VCC
-0.3 to 1.5
1.5.
2
-40 to 150
-55 to 150
Unit
V
W
°C
°C
3 Thermal data
Table 3. Thermal data
Symbol
Parameter
RthJA
Maximum thermal resistance
junction-ambient (1)
1. Package mounted on demonstration board.
VFQFPN
HSOP
Value
60
40
Unit
°C/W
Doc ID 15181 Rev 4
5/44
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for L7980 electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ L7980.PDF Datasheet ] | |
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