BLF544
Download datasheetUHF power MOS transistor
N-channel enhancement mode vertical D-MOS power transistor encapsulated in a 6-lead, SOT171A flange package with a ceramic cap. All leads are isolated from the flange. A marking code showing gate-source voltage (VGS) information is provided for matched pair applications.
Features and benefits
- High power gain
- Easy power control
- Gold metallization ensures excellent reliability
- Good thermal stability
- Designed for broadband operation.
Applications
- Communication transmitters in the UHF frequency range
Parametrics
| Symbol | Parameter | Conditions | Min | Typ/Nom | Max | Unit |
|---|---|---|---|---|---|---|
| frange | frequency range | 100 | 1000 | MHz | ||
| PL(1dB) | nominal output power at 1 dB gain compression | 20 | W | |||
| Test signal: CW | ||||||
| Gp | power gain | VDS = 28 V; f = 960 MHz | 7 | dB | ||
| ηD | drain efficiency | VDS = 28 V; f = 960 MHz; IDq = 40 mA | 50 | % | ||
| PL | output power | VDS = 28 V; f = 960 MHz | 20 | W | ||
Package / Packing
All type numbers in the table below are discontinued.
| Type number |
Package type, (Package outline) |
Outline version | Packing | Product status | Marking |
Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|
| BLF544 | SOT171 (SOT171A) |
sot171a_po | Bulk Pack | Withdrawn | Standard Marking |
BLF544,112 (933997320112) |
Discontinuation information
Pinning info
| Pin | Symbol | Description | Simplified outline | Graphic symbol |
|---|---|---|---|---|
| 1 | S | source |
|
|
| 2 | S | source | ||
| 3 | G | gate | ||
| 4 | D | drain | ||
| 5 | S | source | ||
| 6 | S | source |
Documentation
| Title | Type | Date | |
|---|---|---|---|
| UHF power MOS transistor | Data sheet | 2015-11-30 | |
| Mounting and soldering of RF transistors in air cavity packages | Application note | 2025-02-03 | |
| RF power solutions for ISM, broadcast, navigation and safety radio applications | Brochure | 2026-04-17 | |
| RF power application reports for ISM, broadcast, navigation and safety radio applications | Brochure | 2026-04-17 | |
| Packages for RF power transistors | Leaflet | 2026-04-17 |
Design support
| Title | Type | Date | |
|---|---|---|---|
| BLF544 14 V 40 mA S-parameter data | S-parameter | 2012-06-08 | |
| BLF544 28 V 40 mA S-parameter data | S-parameter | 2012-06-08 |