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LTC4080

Features: Complete Linear Battery Charger with Integrated Buck Converter Battery Charger: Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate Without Risk of Overheating Internal 4.5 Hour Safety Timer for Termination Charge Current Programmable Up to 500mA wi...

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SeekIC No. : 004402445 Detail

LTC4080: Features: Complete Linear Battery Charger with Integrated Buck Converter Battery Charger: Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate Without Risk of O...

LTC4080 Data Sheet

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Part Number:
LTC4080
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

Complete Linear Battery Charger with Integrated Buck Converter Battery Charger:
Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate Without Risk of Overheating
Internal 4.5 Hour Safety Timer for Termination
Charge Current Programmable Up to 500mA with 5% Accuracy
C/10 Charge Current Detection Output
5A Supply Current in Shutdown Mode Switching Regulator:
High Effi ciency Synchronous Buck Converter
300mA Output Current
2.7V to 4.5V Input Range (Powered from BAT Pin)
0.8V to VBAT Output Range
MODE Pin Selects Fixed (2.25MHz) Constant-Frequency PWM Mode or Low ICC (23A) Burst Mode® Operation
2A BAT Current in Shutdown Mode


Application

·Wireless Headsets
·Buetooth Applications
·Portable MP3 Players
·Multifunction Wristwatches


Pinout

Connection Diagram


Specifications

VCC, t < 1ms and Duty Cycle < 1% ........... 0.3V to 7V
VCC Steady State ...................................... 0.3V to 6V
MODE, EN_BUCK ......................... 0.3V to VBAT + 0.3V
FB .............................................................   0.3V to 2V
BAT Short-Circuit Duration ...........................Continuous
BAT Pin Current ..................................................800mA
PROG Pin Current ....................................................2mA
Junction Temperature ......................................... .125
Operating Temperature Range (Note 2) .. 40 to 85
Storage Temperature Range ................. 65 to 125
Lead Temperature (MSE, Soldering, 10 sec) ........ 300



Description

The LTC4080 is a complete constant-current/constantvoltage linear battery charger for a single-cell 4.2V lithium-ion battery with an integrated 300mA synchronous buck converter. The small packages and low external component count make the LTC4080 especially suitable for portable applications. Furthermore, LTC4080 is specifi cally designed to work within USB power specifi cations.

The  pin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal 4.5 hour timer terminates the charge cycle. The full-featured LTC4080 battery charger also includes trickle charge, automatic recharge and soft-start (to limit inrush current).

The LTC4080 integrates a synchronous buck converter that is powered from the BAT pin. It has an adjustable output voltage and can deliver up to 300mA of load current.

The buck converter also features low-current highef fi ciency Burst Mode operation that can be selected by the MODE pin. The LTC4080 is available in 10-lead, low profi le (0.75 mm) 3mm × 3mm DFN and MSOP Exposed Pad packages.




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