3.6V, 1W RF Power Transistors for 900MHz Applications

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The MAX2601/MAX2602 are RF power transistors optimized for use in portable cellular and wireless equipment that operates from three NiCd/NiMH cells or one Li-Ion cell. These transistors deliver 1W of RF power from a 3.6V supply with efficiency of 58% when biased for constant-envelope applications (e.g., FM or FSK). For NADC (IS-54) operation, they deliver 29dBm with -28dBc ACPR from a 4.8V supply.

The MAX2601 is a high-performance silicon bipolar RF power transistor. The MAX2602 includes a high-performance silicon bipolar RF power transistor, and a biasing diode that matches the thermal and process characteristics of the power transistor. This diode is used to create a bias network that accurately controls the power transistor’s collector current as the temperature changes.

The MAX2601/MAX2602 can be used as the final stage in a discrete or module power amplifier. Silicon bipolar technology eliminates the need for voltage inverters and sequencing circuitry, as required by GaAsFET power amplifiers. Furthermore, a drain switch is not required to turn off the MAX2601/MAX2602. This increases operating time in two ways: it allows lower system end-of-life battery voltage, and it eliminates the wasted power from a drain-switch device.

The MAX2601/MAX2602 are available in thermally enhanced, 8-pin SO packages, which are screened to the extended temperature range (-40°C to +85°C).
MAX2601, MAX2602: Pin Configuration MAX2601, MAX2602: Pin Configuration Enlarge+

Key Features

  • Low Voltage: Operates from 1 Li-Ion or 3 NiCd/NiMH Batteries
  • DC-to-Microwave Operating Range
  • 1W Output Power at 900MHz
  • On-Chip Diode for Accurate Biasing (MAX2602)
  • Low-Cost Silicon Bipolar Technology
  • Does Not Require Negative Bias or Supply Switch
  • High Efficiency: 58%


  • 915MHz ISM Transmitters
  • AMPS Cellular Phones
  • CDPD Modems
  • Digital Cellular Phones
  • Land Mobile Radios
  • Microcellular GSM (Power Class 5)
  • Narrow-Band PCS (NPCS)
  • Two-Way Paging
Part NumberFreq.
Efficiency (%)Footprint
(mm x mm)
minmaxSee Notes
MAX2601 0100029584.9 x 6.0
SOIC (N)/8
$2.51 @1k
SOIC (N)/8
$2.64 @1k
See All Power Amplifiers/Drivers (7)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX2602EVKIT: Evaluation Kit for the MAX2601, MAX2602

Technical Documents

Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
App Note 335 Maxim Wireless/RF Power Amplifier Selector Guide

Quality and Environmental Data

Request Reliability Report for: MAX2602 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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