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Overview
| Topology | Buck Converter |
| Input voltage | 4.5-28 V |
| Switching frequency | 250-1000 kHz |
| IC revision | 6 |
Description
The L7980 device is a step-down switching regulator with a 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 externallyadjusted 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.
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
- VFQFPN 3 x 3 - 8L and HSOP8 package
Remarks
- 27uH inductor value is added from design example, refer page number 22
- Suggested inductor values ranges also given table 7 from page number 17
- Output current to be taken from general value. i.e 2A
- Some of the Product and series to be added nearest inductor values rangesREMARKS:-Table 7.inductors
Typical applications
- Networking: XDSL, modems, DC-DC modules
- Consumer:STB, DVD, DVD recorder, car audio, LCD
- Computer:Optical storage, hard disk drive, printers,
- LED driving
- Industrial:PLD, PLA, FPGA, chargers
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(mm) | f(mm) | L(µH) | IRP,40K(A) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Size | Version | IR(A) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD SMT Power Inductor, 7.3 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Length7.3 mm | – | Inductance2.2 µH | Performance Rated Current6.2 A | – | DC Resistance20 mΩ | Self Resonant Frequency60 MHz | Size7345 | VersionRobust | Rated Current4.2 A | MountSMT | ||||
| WE-PD SMT Power Inductor, 7.3 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Length7.3 mm | – | Inductance3.3 µH | Performance Rated Current4.75 A | – | DC Resistance30 mΩ | Self Resonant Frequency55 MHz | Size7345 | VersionRobust | Rated Current3.3 A | MountSMT | ||||
| WE-PD SMT Power Inductor, 7.3 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Length7.3 mm | – | Inductance4.7 µH | Performance Rated Current4.6 A | – | DC Resistance32 mΩ | Self Resonant Frequency37 MHz | Size7345 | VersionRobust | Rated Current3.16 A | MountSMT | ||||
| WE-PD SMT Power Inductor, 12 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Length12 mm | – | Inductance8.2 µH | Performance Rated Current8.5 A | Saturation Current6.2 A | DC Resistance20 mΩ | Self Resonant Frequency25 MHz | Size1260 | VersionStandard | Rated Current6.2 A | MountSMT | ||||
| WE-PD SMT Power Inductor, 12 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Length12 mm | – | Inductance10 µH | Performance Rated Current7.7 A | Saturation Current5.5 A | DC Resistance24 mΩ | Self Resonant Frequency21.5 MHz | Size1260 | VersionStandard | Rated Current5 A | MountSMT | ||||
| WE-PD SMT Power Inductor, 12 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Length12 mm | – | Inductance12 µH | Performance Rated Current7.4 A | Saturation Current4.9 A | DC Resistance26 mΩ | Self Resonant Frequency19.7 MHz | Size1260 | VersionStandard | Rated Current4.5 A | MountSMT | ||||
| WE-PD SMT Power Inductor, 12 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Length12 mm | – | Inductance15 µH | Performance Rated Current7 A | Saturation Current4.5 A | DC Resistance28 mΩ | Self Resonant Frequency16.6 MHz | Size1260 | VersionStandard | Rated Current4.2 A | MountSMT | ||||
 | WE-PD4 SMT Power Inductor, 18.54 mm, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Length18.54 mm | – | Inductance22 µH | – | Saturation Current7 A | DC Resistance47 mΩ | Self Resonant Frequency13 MHz | SizeX | – | Rated Current3.5 A | MountSMT | |||
| WE-PD4 SMT Power Inductor, 18.54 mm, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Length18.54 mm | – | Inductance33 µH | – | Saturation Current5.5 A | DC Resistance66 mΩ | Self Resonant Frequency10 MHz | SizeX | – | Rated Current3 A | MountSMT | |||
| WE-PD4 SMT Power Inductor, 18.54 mm, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD4 SMT Power Inductor | Length18.54 mm | – | Inductance47 µH | – | Saturation Current4.5 A | DC Resistance86 mΩ | Self Resonant Frequency8.4 MHz | SizeX | – | Rated Current2.6 A | MountSMT | |||
 | WA-SNSN Snap-In Keyslot Snap Locking on both ends, 31.7 mm, 3.2 mm | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SNSN Snap-In Keyslot Snap Locking on both ends | Length31.7 mm | Drilling in Panel3.2 mm | – | – | – | – | – | – | – | – | – |