Product Summary

The LLE18040XL is an NPN microwave power transistor. The LLE18040XL is in a SOT437A glued cap metal ceramic flange package, with emitter connected to flange. Applications of the LLE18040XL include: Intended for use in common emitter, class AB amplifiers in CW conditions for professional applications between 1.7GHz and 2GHz.

Parametrics

LLE18040XL absolute maximum ratings: (1) collector-base voltage VCBO: 45V (open emitter) ; (2) collector-emitter voltage, VCER: 30V ( RBE=220Ω) ; (3) collector-emitter voltage VCEO: 15V ( open base) ; (4) emitter-base voltage VEBO ( open collector) : 3V; (5) collector current (DC) IC: 0.5A; (6) input power Pi: 1W (f=1.85GHz; V=24V; class AB) ; (7) total power dissipation Ptot: 11W (Tmb=75°C) ; (8) storage temperature Tstg: -65°C to +150°C; (9) junction temperature Tj: 200°C; (10) soldering temperature Tsld: 235°C (t≤10S; 1) .

Features

LLE18040XL features: (1) Diffused emitter ballasting resistors providing excellent current sharing and withstanding a high VSWR; (2) Interdigitated structure provides high emitter efficiency; (3) Gold metallization realizes very good stability of the characteristics and excellent lifetime; (4) Internal input prematching ensures good stability and allows an easier design of wideband circuits; (5) Multicell geometry gives good balance of dissipated power and low thermal resistance.

Diagrams

LLE18040XL Circuit

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