Renesas BB502MBS-TR-E

Overview

BB502MBS-TR-E from Renesas Electronics is a UHF RF amplifier IC featuring a built-in biasing circuit, designed for 900 MHz front-end amplification in wireless transceivers. It delivers 22 dB typical power gain and 1.6 dB typical noise figure at 900 MHz, with ESD protection rated to 200 V (C=200 pF, Rs=0), housed in a miniaturized MPAK-4 (SOT-143Rmod) surface-mount package.

For engineers reviewing the BB502MBS-TR-E datasheet, BB502MBS-TR-E pinout, BB502MBS-TR-E application, or BB502MBS-TR-E equivalent, this page provides verified electrical characteristics, gate-controlled gain reduction behavior, S-parameter performance across 50–1000 MHz, and validated alternative options for UHF RF amplifier selection.

Technical Context

The BB502MBS-TR-E is a dual-gate MOSFET IC optimized for UHF amplification with independent gate control: Gate1 sets DC operating point (ID = 11 mA typ. at VG1 = 5 V, VG2S = 4 V), while Gate2 enables analog gain control via variable VG2S (0.3–4 V), achieving up to 10 dB gain reduction. Its low Crss (0.02 pF typ.) and high |yfs| (25 mS typ.) support stable broadband operation.

It operates under fixed VDS = 5 V, uses external RG = 180 kΩ for Gate1 biasing, and integrates on-chip ESD diodes-no external protection required. The device exhibits minimal reverse isolation (S12 < –20 dB at 900 MHz) and input/output match optimized for 50 Ω systems per test circuit.

Key Specifications

Pinout & Package

Package: MPAK-4 (SOT-143Rmod), JEITA code SC-61AA, Renesas code PLSP0004ZA-A - 4-pin ultra-compact surface-mount package with 0.013 g mass and 1.0 × 1.35 × 0.35 mm footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar UHF RF amplifier applications.

Compared with NE85633 and QPL9057, the BB502MBS-TR-E uniquely combines built-in biasing, analog Gate2 gain control, and ESD hardening in a miniature package-making it optimal for cost- and space-constrained UHF receiver front-ends requiring tunable gain without added components.

Availability

BB502MBS-TR-E is available at Aetrix Electronics and suitable for cellular IoT transceiver front-ends, UHF RFID reader amplifiers, and wireless audio remote control systems requiring stable component supply and long-term production continuity.

Supply support for BB502MBS-TR-E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and communications markets.

The BB502M series belongs to Renesas' BBFET family of UHF RF amplifier ICs, designed specifically for low-cost, high-reliability 900 MHz ISM band applications in consumer and industrial wireless equipment.

FAQ

What is the maximum recommended drain-to-source voltage for BB502MBS-TR-E?

The absolute maximum drain-to-source voltage (VDS) for BB502MBS-TR-E is 6 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage to the channel. For reliable long-term use, the recommended operating VDS is 5 V - the condition used across all electrical characteristics including power gain and noise figure measurements.

Does BB502MBS-TR-E require external biasing components?

No, BB502MBS-TR-E incorporates a built-in biasing circuit for Gate1, eliminating the need for external bias resistors in standard configurations. Only an external 180 kΩ resistor is required between Gate1 and 5 V supply to set the nominal 11 mA drain current - significantly reducing component count versus discrete MOSFET solutions.

How does Gate2 voltage affect gain in BB502MBS-TR-E?

In BB502MBS-TR-E, Gate2 voltage (VG2S) directly controls RF gain: at VG2S = 4 V, full gain (22 dB) is achieved; reducing VG2S to 0.3 V yields up to 10 dB gain reduction. This analog gain control is monotonic and linear over the 0.3–4 V range, enabling simple AGC implementation without digital interface overhead.

What is the thermal resistance (θj-a) of BB502MBS-TR-E in its MPAK-4 package?

The datasheet does not specify junction-to-ambient thermal resistance (θj-a) for BB502MBS-TR-E. However, the maximum channel temperature (Tch) is rated at 150°C, and the maximum channel power dissipation (Pch) is 150 mW at Ta = 25°C. Derating curves on page 5 show Pch drops to ~100 mW at Ta = 70°C - implying θj-a ≈ 500°C/W based on standard thermal modeling for this package size and construction.

Is BB502MBS-TR-E RoHS compliant and lead-free?

Yes, BB502MBS-TR-E is RoHS compliant and lead-free. The datasheet references compliance with EU RoHS Directive, and the "-TR-E" suffix denotes tape-and-reel packaging meeting J-STD-020 moisture sensitivity level (MSL) requirements. No lead-containing materials are used in the die, bond wires, or MPAK-4 package plating.