IC manufacturers STMicroelectronics
IC manufacturers (103)
- All manufacturers
Analog Devices
Infineon Technologies
Microchip
Onsemi
Renesas
ROHM
STMicroelectronics
Texas Instruments
- 3peak incorporated (28)
- Ablic (23)
- Acco Semiconductor (1)
- Advanced Power (4)
- Allegro Microsystems (100)
- Alpha & Omega Semiconductor (37)
- AnalogySemi (3)
- AnDAPT Inc (204)
- Anpec (13)
- AXElite (2)
- Backward (6)
- Bright Power Semiconductor (1)
- Broadcom (46)
- Cambridge GaN Devices (18)
- Chipanalog Micro (10)
- Cologne Chips (1)
- Convenient Power (1)
- Dialog Semiconductor (12)
- Diodes Incorporated (259)
- Divimath (8)
- Elmos AG (1)
- EPC (136)
- e-Peas Semiconductors (1)
- Eta Solutions Co. Ltd. (9)
- GaN Systems (8)
- GaNPower (3)
- Giantec (1)
- Gstek Wuxi (1)
- Helix Semiconductor (7)
- IKON (1)
- Indie Semiconductor (8)
- Innovision Semiconductor Inc (2)
- Intel (68)
- Inventchip Technology (3)
- ISSI (51)
- JoulWatt (20)
- KDPOF (3)
- Kinetic Technology (8)
- Lattice semiconductor Corporation (38)
- Littelfuse (1)
- Lumissil Microsystems (8)
- M3 Technology (M3Tek) (7)
- Macnica (22)
- Marvell Semiconductor (1)
- MaxLinear (181)
- Menlo Micro (1)
- MikroE (25)
- MindCet (2)
- Monolithic Power Systems (980)
- Navitas Semiconductor Inc (6)
- NewEdge Technologies, Inc. (1)
- Nexperia (266)
- Nisshinbo Micro Device Inc. (10)
- Novosense Micro (1)
- NXP (333)
- O2 Micro International Ltd (10)
- On Bright (7)
- Panasonic (2)
- PN Junction Semiconductor (2)
- Power Integrations (117)
- Powermat (1)
- Pulsiv (19)
- Qorvo (96)
- Realsil SuRealsil(tek) Microelectronics (1)
- Richtek (297)
- Sanken Electric Co., Ltd. (16)
- Sckipio (6)
- Semtech (86)
- SG-Micro (54)
- SiFive (2)
- Silanna Semiconductor (9)
- Silergy Corporation (33)
- Silicon Laboratory Inc. (108)
- Silicontent Technology (59)
- Silvertel (59)
- Skycore Semiconductors (1)
- Skyworks (33)
- Southchip (14)
- Summit Wireless (1)
- Tagore Tech (7)
- Taiwan Semiconductor (1)
- TDK Corporation (1)
- Tempo Semiconductor (1)
- Torex (37)
- Toshiba (25)
- Transphorm (21)
- TransSIP (2)
- Union (21)
- uPI Semiconductor (2)
- Valens Semiconductor (31)
- Wise Integration (3)
- Wolfspeed (23)
- Xilinx (22)
- XL Semiconductor (3)
- XYSemi (62)
Overview
| Topology | Buck Converter |
| Input voltage | 4.5-28 V |
| Switching frequency | 250-1000 kHz |
| Output 1 | 28 V |
| IC revision | 5 |
Description
The L7981 device 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 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 RthJAdown to 60°C/W and 40°C/W respectively.
Features
- 3 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:-TABLE 7.INDUCTORS
Typical applications
- XDSL, modems, DC-DC modules
- Computer
- Industria
- Consumer
- Suitable for LED driving
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Size | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD SMT Power Inductor, 2.2 µH, 9.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance2.2 µH | Saturation Current9.5 A | DC Resistance8 mΩ | Self Resonant Frequency53 MHz | Size1050 | VersionPerformance | ||||
| WE-PD SMT Power Inductor, 3.3 µH, 9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance3.3 µH | Saturation Current9 A | DC Resistance10.5 mΩ | Self Resonant Frequency42 MHz | Size1050 | VersionPerformance | ||||
| WE-PD SMT Power Inductor, 4.7 µH, 8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance4.7 µH | Saturation Current8 A | DC Resistance12.4 mΩ | Self Resonant Frequency34 MHz | Size1050 | VersionPerformance | ||||
 | WE-PD SMT Power Inductor, 8.2 µH, 4.7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance8.2 µH | Saturation Current4.7 A | DC Resistance49 mΩ | Self Resonant Frequency30 MHz | Size1030 | VersionPerformance | ||||
| WE-PD SMT Power Inductor, 10 µH, 4.1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance10 µH | Saturation Current4.1 A | DC Resistance62 mΩ | Self Resonant Frequency25 MHz | Size1030 | VersionPerformance | ||||
| WE-PD SMT Power Inductor, 15 µH, 3.4 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | Inductance15 µH | Saturation Current3.4 A | DC Resistance89 mΩ | Self Resonant Frequency19.5 MHz | Size1030 | VersionPerformance |