LTC4012-3
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LTC4012-3

High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control

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Part Models 4
1ku List Price Starting From $3.78
Features
  • General Purpose Battery Charger Controller
  • Efficient 550kHz Synchronous Buck PWM Topology
  • ±0.5% Output Float Voltage Accuracy
  • Programmable Charge Current: 4% Accuracy
  • Programmable AC Adapter Current Limit: 3% Accuracy
  • No Audible Noise with Ceramic Capacitors
  • INFET Low Loss Ideal Diode PowerPath™ Control
  • Wide Input Voltage Range: 6V to 28V
  • Wide Output Voltage Range: 2V to 28V
  • Indicator Outputs for Charging, C/10 Current Detection and Input Current Limiting
  • Analog Charge Current Monitor
  • Micropower Shutdown
  • 20-Pin 4mm × 4mm × 0.75mm QFN Package
Additional Details
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The LTC4012-3 is a constant-current/constant-voltage battery charger controller. It uses a synchronous quasiconstant frequency PWM control architecture that will not generate audible noise with ceramic bulk capacitors. Charge current is set by external resistors and can be monitored as an output voltage across the programming resistor. With no built-in termination, the LTC4012-3 charges a wide range of batteries under external control.

The LTC4012-3 features fully adjustable output voltage. For charge management and safety, the IC includes an input P-channel MOSFET ideal diode controller, battery (output) overvoltage protection, reverse charge current protection, PWM soft-start and robust non-overlap control for an all N-channel MOSFET PWM power stage.

The device includes AC adapter input current limiting, which maximizes the charge rate for a fixed input power level. An external sense resistor programs the input current limit, and the ICL status pin indicates reduced charge current as a result of AC adapter current limiting. Ideal diode control at the adaptor input improves charger efficiency.

The CHRG status pin is active during all charging modes, including special indication for low charge current.

VFLOAT VFLOAT Range /ACP Pin
LTC4012 Adj. 2V-28V Yes
LTC4012-1 4.2V 1-4 Li-Ion Cells Yes
LTC4012-2 4.1V 1-4 Li-Ion Cells Yes
LTC4012-3 Adj. 2V-28V No

Applications

  • Notebook Computers
  • Portable Instruments
  • Battery Backup Systems
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Documentation View All Documentation
Part Models 4
1ku List Price Starting From $3.78
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LTC4012-3

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UPDATED 06/10/2010
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LTC4012-3: High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control Data Sheet

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UPDATED 08/05/2010
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LTC4012-3: PowerPath制御付き、高効率、マルチケミストリ･バッテリチャージャ データシート

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UPDATED 03/23/2018
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UPDATED 06/01/2020
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Documentation

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4012CUF-3#PBF 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) external-link
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LTC4012CUF-3#TRPBF 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) external-link
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LTC4012IUF-3#PBF 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) external-link
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LTC4012IUF-3#TRPBF 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

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Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC4012CUF-3#PBF

PRODUCTION

LTC4012CUF-3#TRPBF

PRODUCTION

LTC4012IUF-3#PBF

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LTC4012IUF-3#TRPBF

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PCN21_0269_Form

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Detailed Change Description

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