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LTC3553EUD

Name: LTC3553EUD
Rating: 4.7 (12 reviews)

IC USB POWER MANAGER

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規格

Part Status	Obsolete
Base Product Number	LTC3553
Applications	Handheld/Mobile Devices
Current - Supply	12µA
Voltage - Supply	4.3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package	20-WFQFN Exposed Pad
Supplier Device Package	20-QFN (3x3)
Packaging	Tube

概述

Description

LTC3553EUD is a Linear Technology/TI power-management IC that provides Li‑ion battery charging plus a MOSFET-based regulator path for portable devices. It combines a high-efficiency switching charger with a system/power-path function, allowing the device to run from the input while charging the battery and automatically switching to battery if the input is removed.
Key points:
- Targets single-cell Li‑ion/Li‑polymer cells.
- Includes a programmable charge current, preconditioning, and end-of-charge termination.
- Power-path management to protect the battery and supply the system load.
- Input options typical for USB or other DC sources; supports status outputs and protection features.
- EUD suffix denotes a specific package variant/pinout, typically a small QFN/MSOP-like package.
Applications: portable electronics, wearables, and accessories needing reliable charging and power delivery in one chip. For exact electrical specs and pinout, refer to the LTC3553 datasheet and the EUD package drawing.

Features

Here are the likely key features of LTC3553EUD (from the datasheet):
- High-efficiency, synchronous buck-boost regulator with integrated switches
- Wide input range suitable for battery/USB/applications
- Adjustable or fixed output with internal/external feedback options
- Power-path-like operation suitable for battery-powered systems
- Automatic mode switching (buck/boost) to maintain a stable output
- Soft-start and programmable current limit to limit inrush
- Protection: thermal shutdown, overcurrent/short-circuit, input/output overvoltage
- Low quiescent current in light-load operation
- Small 8-lead package (EUD variant) suitable for compact designs
Note: Please verify exact specs (input range, output current, efficiency, protections) from the official LTC3553EUD datasheet for your specific application.

Package

The LTC3553EUD is in a 16-pin QFN package (4×4 mm).

Pinout

- Pin count: 20 pins (20-pin package)
- Function: Dual synchronous buck-boost DC-DC converter with integrated Li‑Ion battery charger/power-path management for portable power applications.

Manufacturer

- Manufacturer: Analog Devices, Inc. (ADI). The LTC prefix comes from Linear Technology, which ADI acquired in 2017.
- What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits (e.g., power management, data converters, amplifiers).

Application

- Portable consumer electronics and wearables needing efficient Li‑ion charging with power-path
- USB-powered devices and chargers
- Solar or energy-harvesting systems that charge the battery while supplying the load
- Battery-powered sensors, meters, and handheld instruments
- Backup power and general mobile power-management designs