Part Models 4
1ku List Price
price unavailable
Features
  • RF Power Amplifier Control in ThinSOT Package
  • Internal Schottky Diode Detector with > 45dB Range
  • Wide Input Frequency Range:
    • 300MHz to 2.7GHz (LTC4400-1)
    • 300MHz to 2GHz (LTC4400-2)
  • Autozero Loop Cancels Offset Errors and Temperature Dependent Offsets
  • Wide VCC Range: 2.7V to 6V
  • Automatic Bandwidth Control Improves Low Power Ramp Response
  • Allows Direct Connection to Battery
  • RF Output Power Set by External DAC
  • Internal Frequency Compensation
  • Rail-to-Rail Power Control Output
  • Power Control Signal Overvoltage Protection
  • Low Operating Current: 1mA
  • Low Shutdown Current: 10µA
  • Two Pole PCTL Input Filtering
  • Low Profile (1mm) ThinSOT (LTC4400-1) and 8-Pin MSOP (LTC4400-2) Packages
Additional Details
show more Icon

The LTC4400-1 is a SOT-23 RF power controller for fast turn-on RF power amplifiers operating in the 300MHz to 2.7GHz range. Examples include the Hitachi PF08109B, PF08122B, PF08123B, PF08107B and RF Micro Devices RF3108. For slow turn-on RF power amplifiers refer to the LTC4401-1/LTC4401-2.

RF power is controlled by driving the RF amplifier power control pin and sensing the resultant RF output power via a directional coupler or capacitive tap. The RF input voltage is peak detected using an on-chip Schottky diode. This detected voltage is compared to the DAC voltage at the PCTL pin to control the output power. The RF power amplifier is protected against high power control pin voltages.

Internal and external offsets are cancelled over temperature by an autozero control loop, allowing accurate low power programming. The shutdown feature disables the part and reduces the supply current to <10µA.

A dual control channel version (LTC4400-2) is also available in an 8-pin MSOP package.

Applications

  • GSM/GPRS Cellular Telephones
  • PCS Devices
  • Wireless Data Modems
  • U.S. TDMA Cellular Phones
Part Models 4
1ku List Price
price unavailable

close icon

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4400-1ES6#TRMPBF
  • HTML
  • HTML
LTC4400-1ES6#TRPBF
  • HTML
  • HTML
LTC4400-2EMS8#PBF
  • HTML
  • HTML
LTC4400-2EMS8#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Sep 10, 2019

- 19_0033

Obsolescence of all materials of LTC4400-1, LTC4400-2, LTC4401-1, LTC4401-2, LTC4402-1, LTC4402-2, LTC4403-1, LTC4403-2, LTC1957-1, LTC1957-2, LTC1758-1, LTC1758-2

LTC4400-1ES6#TRMPBF

Obsolete

LTC4400-1ES6#TRPBF

Obsolete

LTC4400-2EMS8#PBF

Obsolete

LTC4400-2EMS8#TRPBF

Obsolete

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Sep 10, 2019

- 19_0033

arrow down

Obsolescence of all materials of LTC4400-1, LTC4400-2, LTC4401-1, LTC4401-2, LTC4402-1, LTC4402-2, LTC4403-1, LTC4403-2, LTC1957-1, LTC1957-2, LTC1758-1, LTC1758-2

LTC4400-1ES6#TRMPBF

Obsolete

LTC4400-1ES6#TRPBF

Obsolete

LTC4400-2EMS8#PBF

Obsolete

LTC4400-2EMS8#TRPBF

Obsolete

Software & Part Ecosystem

Evaluation Kits 2

reference details image

DC420A-B

LTC4401-1 | Power Output Controller for RF Power Amplifiers used in Cellular Phones

reference details image

DC420A-A

LTC4400-1 | Power Output Controller for RF Power Amplifiers used in Cellular Phones

Recently Viewed