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LTC3455

Features: Seamless Transition between Input Power Sources:Li-Ion Battery, USB, and 5V Wall Adapter Accurate USB Current Limiting (500mA/100mA) Two High Efficiency DC/DC Converters: Up to 96% Thermal Regulation Maximizes Battery ChargeRate without Risk of Overheating* Full-Featured Li-Ion Battery ...

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SeekIC No. : 004402253 Detail

LTC3455: Features: Seamless Transition between Input Power Sources:Li-Ion Battery, USB, and 5V Wall Adapter Accurate USB Current Limiting (500mA/100mA) Two High Efficiency DC/DC Converters: Up to 96% Therma...

LTC3455 Data Sheet

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Part Number:
LTC3455
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: 2024/12/25

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Product Details

Description



Features:

Seamless Transition between Input Power Sources:Li-Ion Battery, USB, and 5V Wall Adapter
Accurate USB Current Limiting (500mA/100mA)
Two High Efficiency DC/DC Converters: Up to 96%
Thermal Regulation Maximizes Battery ChargeRate without Risk of Overheating*
Full-Featured Li-Ion Battery Charger
Hot Swap™ Output for SDIO and Memory Cards
Pin-Selectable Burst Mode®Operation
Output Disconnect: All Outputs Discharged toGround During Shutdown
Available in a 4mm * 4mm * 0.8mm 24-PinQFN Package


Application

Handheld Computers
Digital Cameras
MP3 Players


Pinout

Connection Diagram


Specifications

VBAT, VMAX, USB Voltages ...........................0.3V to 6V
SW1, SW2 Voltages ....................0.3V to (VMAX+0.3V)
TIMER Voltage .............................0.3V to (VMAX+0.3V)
PWRON, ON, ON2, HSON Voltages .............0.3V to 6V
PBSTAT, RST, CHRG, AO Voltages ..............0.3V to 6V
HSI, HSO Voltages .....................................0.3V to 6V
MODE, USBHP, SUSPEND Voltages ............0.3V to 6V
WALLFB, AI, PROG Voltages .......................0.3V to 2V
FB1, FB2 Voltages ......................................0.3V to 2V
Junction Temperature........................................ 125°C
Operating Temperature Range(Note 2)40°C to 85°C
Storage Temperature Range ............ 65°C to 125°C


Description

The LTC®3455 is a complete power management solutionfor a variety of portable applications. The device containstwo synchronous step-down DC/DC converters, a USBpower controller, a full-featured Li-Ion battery charger, aHot Swap output, a low-battery indicator, and numerousinternal protection features. The LTC3455 provides asmall, simple solution for obtaining power from threedifferent power sources: a single-cell Li-Ion battery, a USBport, and a wall adapter. Current drawn from the USB busis accurately limited under all conditions. Whenever a USBor a wall adapter is present, the battery charger is enabledand all internal power for the device is drawn from theappropriate external power source. All outputs are dis-charged to ground during shutdown to provide completeoutput disconnect. The device is available in a4mm × 4mm 24-pin exposed-pad QFN package




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