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LTC4098

Features: Switching Regulator with Bat-TrackTM AdaptiveOutput Control Makes Optimal Use of LimitedPower Available from USB Port to Charge Batteryand Power Application Overvoltage Protection Guards Against Damage Bat-Track External Step-Down Switching RegulatorControl Maximizes Effi ciency from Au...

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SeekIC No. : 004402461 Detail

LTC4098: Features: Switching Regulator with Bat-TrackTM AdaptiveOutput Control Makes Optimal Use of LimitedPower Available from USB Port to Charge Batteryand Power Application Overvoltage Protection Guards ...

LTC4098 Data Sheet

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Part Number:
LTC4098
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:

Switching Regulator with Bat-TrackTM Adaptive
Output Control Makes Optimal Use of Limited
Power Available from USB Port to Charge Battery
and Power Application
Overvoltage Protection Guards Against Damage
Bat-Track External Step-Down Switching Regulator
Control Maximizes Effi ciency from Automotive,
Firewire and Other High Voltage Input Sources
180m Internal Ideal Diode Plus External Ideal Diode
Controller Seamlessly Provide Low Loss PowerPathTM
when Input Power is Limited or Unavailable
Preset 4.2V Charge Voltage with 0.5% Accuracy
(4.1V for LTC4098-1)
4.1V Float Voltage (LTC4098-1) Improves Battery Life
and High Temperature Safety Margin
Instant-On Operation with Discharged Battery
700mA Maximum Load Current from USB Port
1.5A Maximum Charge Current with Thermal Limiting
Ultra-Thin (0.55mm) 20-Lead 3mm * 4mm QFN


Application

Media Players
GPS
PDAs
 Smart Phones


Pinout

Connection Diagram


Specifications

VBUS, WALL (Transient) t < 1ms,
Duty Cycle < 1% .......................................... 0.3V to 7V
VBUS, WALL (Static), BAT, BATSENS,
CHRG, NTC, ................................................. 0.3V to 6V
D0, D1, D2 .........0.3V to Max (VBUS, VOUT, BAT) + 0.3V
IOVSENS .................................................................±10mA
ICLPROG ....................................................................3mA
IPROG ........................................................................2mA
ICHRG ......................................................................50mA
IVOUT, ISW, IBAT ............................................................2A
IACPR ......................................................................10mA
Operating Temperature Range.................. 40 to 85
Junction Temperature ........................................... 125
Storage Temperature Range ................... 65 to 125


Description

The LTC®4098/LTC4098-1 are high effi ciency USB Power- Path controllers and full-featured Li-Ion/Polymer battery chargers. They seamlessly manage power distribution from multiple sources including USB, wall adapter, automotive, Firewire or other high voltage DC/DC converters, and a Li-Ion/Polymer battery.

The LTC4098/LTC4098-1's internal switching regulator automatically limits its input current for USB compatibility. For automotive and other high voltage applications, the LTC4098/LTC4098-1 interface with a Linear Technology external switching regulator to provide a high effi ciency high voltage power path. Both the USB and the optional high voltage inputs feature Bat-Track optimized charging to provide maximum power to the application and ease thermal issues in high power density applications with input supplies from 5V to as high as 38V.

An overvoltage circuit protects the LTC4098/LTC4098-1 from high voltage damage on the USB/wall adaptor inputs with an N-channel FET and a resistor.

The LTC4098/LTC4098-1 are available in the ultra-thin (0.55mm) 20-lead 3mm * 4mm QFN surface mount package.




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