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LTC1682

Features: Low Output Noise: 60µVRMS (100kHz BW) Adjustable or Fixed Boosted Output Adjustable Output Voltage Range: 2.5V to 5.5V Fixed Output Voltages: 3.3V, 5V Wide Input Voltage Range: 1.8V to 4.4V Uses Small Ceramic Capacitors No Inductors Required Output Current up to 50mA 550kHz Switch...

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SeekIC No. : 004401791 Detail

LTC1682: Features: Low Output Noise: 60µVRMS (100kHz BW) Adjustable or Fixed Boosted Output Adjustable Output Voltage Range: 2.5V to 5.5V Fixed Output Voltages: 3.3V, 5V Wide Input Voltage Range: 1.8V...

LTC1682 Data Sheet

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Part Number:
LTC1682
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/21

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Product Details

Description



Features:

Low Output Noise: 60µVRMS (100kHz BW)
Adjustable or Fixed Boosted Output
Adjustable Output Voltage Range: 2.5V to 5.5V
Fixed Output Voltages: 3.3V, 5V
Wide Input Voltage Range: 1.8V to 4.4V
Uses Small Ceramic Capacitors
No Inductors Required
Output Current up to 50mA
550kHz Switching Frequency
Low Operating Current: 150µA
Low Shutdown Current: 1µA
Internal Thermal Shutdown and Current Limiting
Available in 8-Pin MSOP and SO Packages


Application

VCO Power Supplies in Cellular Phones
2-Way Pagers
Wireless PCMCIA Cards
Portable Medical Instruments
Low Power Data Acquisition
Remote Transmitters


Pinout

Connection Diagram


Specifications

VIN to Ground ..............................................0.3V to 5V
VOUT Voltage ..............................................0.3V to 6V
CPO to Ground ........................................................ 10V
SHDN, FILT/FB Voltage to
Ground ......................................... 0.3V to (VIN + 0.3V)
VOUT Short-Circuit Duration............................  Indefinite
IOUT .....................................................................  90mA
Operating Temperature Rang
Commercial ..............................................  0°C to 70°C
Extended Commercial (Note 2) ............ 40°C to 85°C
Industrial ............................................  40°C to 85°C
Storage Temperature Range ..............65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................ 300°C
Maximum Junction Temperature .......................... 125°C


Description

The LTC®1682/LTC1682-3.3/LTC1682-5 are doubler chargepumps with an internal low noise, low dropout (LDO) linearregulator. These parts are designed to provide a low noiseboosted supply voltage for powering noise sensitive devicessuch as high frequency VCOs in wireless applications.

An internal doubler charge pump converts a 1.8V to 4.4Vinput to a boosted output, while the internal LDO regulatorconverts the boosted voltage to a low noise regulated output.

The adjustable version allows the user to set VOUT via externalresistors connected to FB. The regulator is capable of supply-ing up to 50mA of output current. Shutdown reduces thesupply current to < 5µA, removes the load from VIN bydisabling the regulator and discharges VOUT to groundthrough a 100Ω switch.

The LTC1682 LDO regulator is stable with only 2µF on theoutput. Small ceramic capacitors can be used, reducing PCboard area.

The LTC1682/LTC1682-3.3/LTC1682-5 are short-circuit andover temperature protected. The parts are available in 8-pinMSOP and SO packages.




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