This product is not recommended for design-in.
The recommended type is: BLF989S

UHF power LDMOS transistor

A 600 W LDMOS RF power transistor for broadcast Doherty transmitter applications. The excellent ruggedness of this device makes it ideal for digital and analog transmitter applications.


Whitepaper Doherty Architectures in UHF

This White Paper explains different PA architectures which can be used in today’s UHF Broadcast industry. 

In this paper a brief discussion will be given to explain these new Doherty architectures and to help customers finding the best solution for their transmitter. Ampleon’s transistor family BLF8XX can support these Doherty architectures.

Click here to download.

Features and benefits

  • High efficiency
  • High power gain
  • Excellent ruggedness (VSWR ≥ 40 : 1 through all phases)
  • Excellent thermal stability
  • Integrated ESD protection
  • One Doherty design covers the full bandwidth from 470 MHz to 860 MHz
  • Internal input matching for ease of use
  • Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances (RoHS)


  • Broadcast transmitter applications in the UHF band
  • Digital Broadcasting


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Design tool

RF Power Lifetime Calculator


UHF power LDMOS transistor



Symbol Parameter Conditions Min Typ/Nom Max Unit
frange frequency range 470 806 MHz
PL(1dB) nominal output power at 1 dB gain compression 600 W
Test signal: DVB-T (8k OFDM)
Gp power gain VDS = 50 V [0] 17 dB
ηD drain efficiency VDS = 50 V; 470 MHz < f < 806 MHz; IDq = 1.3 A [0] 40 %
PL(AV) average output power [0] 115 W
IMDshldr intermodulation distortion shoulder attenuation [0] -40 dBc
PAR peak-to-average ratio [0] [1] 8 dB

Package / Packing

All type numbers in the table below are not recommended for design-in.

Type number Package Outline version Reflow-/Wave
Packing Product status Marking Orderable part number,
(Ordering code (12NC))
sot539b_po Bulk Pack Active Standard Marking BLF888DSU
(9340 678 65112)

Pinning info

Pin Symbol Description Simplified outline Graphic symbol
1 D1 drain1 (peak)
2 D2 drain2 (main)
3 G1 gate1 (peak)
4 G2 gate2 (main)
5 S source


All type numbers in the table below are not recommended for design-in.

Type number Orderable part number Chemical content RoHS / RHF Leadfree conversion date MSL MSL LF
BLF888DS BLF888DSU BLF888DS Always Pb-free 1 1
Quality and reliability disclaimer

Ordering & availability

Type number Ordering code (12NC) Orderable part number Distributor Buy online Samples
BLF888DS 9340 678 65112 BLF888DSU RFMW Buy Request samples
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Design support

Title Type Date
PCB Design BLF888D(S) (Data sheet) Design support 2014-04-25
BLF888D ADS-2016 Simulation model 2017-04-14