LTC4080X 500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck

The LTC4080X is a complete constant-current / constant-voltage linear battery charger for a single-cell 4.2V lithium-ion/polymer battery with an integrated 300mA synchronous buck converter. A 3mm × 3mm DFN package and low external component count make the LTC4080X especially suitable for portable applications. Furthermore, the LTC4080X is specifically designed to work within USB power specifications.

The CHRG 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 LTC4080X battery charger also includes automatic recharge and soft-start to limit inrush current. If trickle charging is desired, please see the LTC4080 datasheet.

The LTC4080X 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 high-efficiency Burst Mode operation that can be selected by the MODE pin.

The LTC4080X is available in 10-lead, low profile (0.75 mm) 3mm × 3mm DFN and 10-lead MSE packages

产品特点 Features

Complete linear Battery Charger with Integrated Buck Converter in 3mm x 3mm DFN Package
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

5µA Supply Current in Shutdown Mode
Switching Regulator:

High Efficiency Synchronous Buck Converter

300mA Output Current (Constant-Frequency Mode)

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 (23µA) Burst Mode® Operation

2µA BAT Current in Shutdown Mode

应用

Wireless Headsets
Bluetooth Applications
Portable MP3 Players
Multifunction Wristwatches

典型应用图

参数

LTC4080X 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC4080EDD	DFN	10	E	$2.71	$1.90
LTC4080EDD#PBF	DFN	10	E	$2.71	$1.90
LTC4080EDD#TR	DFN	10	E		$1.96
LTC4080EDD#TRPBF	DFN	10	E		$1.96
LTC4080EMSE#PBF	MSOP	10	E	$2.71	$1.90
LTC4080EMSE#TRPBF	MSOP	10	E		$1.96
LTC4080XEDD#PBF	DFN	10	E	$2.71	$1.90
LTC4080XEDD#TRPBF	DFN	10	E		$1.96
LTC4080XEMSE#PBF	MSOP	10	E	$2.71	$1.90
LTC4080XEMSE#TRPBF	MSOP	10	E		$1.96

LTC4080X 数据手册及相关资料下载

数据手册(英文) : LTC4080X - 500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck.PDF
可靠性数据 : R540 Reliability Data .PDF