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参数资料
| 型号： | LTC4080EMSE#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.8 A BATTERY CHARGE CONTROLLER, 2750 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | PLASTIC, MSOP-10 |
| 文件页数： | 1/20页 |
| 文件大小： | 288K |
| 代理商： | LTC4080EMSE#TR |
LTC4080
1
4080fa
■ Wireless Headsets
■ Bluetooth Applications
■ Portable MP3 Players
■ Multifunction Wristwatches
Li-Ion Battery Charger with 1.8V Buck Regulator
500mA Standalone Li-Ion
Charger with Integrated
300mA Synchronous Buck
The LTC4080 is a complete constant-current/constant-
voltage linear battery charger for a single-cell 4.2V
lithium-ion battery with an integrated 300mA synchron-
ous buck converter. The small packages and low external
component count make the LTC4080 especially suitable for
portable applications. Furthermore, LTC4080 is specically
designed to work within USB power specications.
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 LTC4080 battery charger also includes
trickle charge, automatic recharge and soft-start (to limit
inrush current).
The LTC4080 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 cur-
rent. The buck converter also features low-current high-
efciency Burst Mode operation that can be selected by
the MODE pin.
The LTC4080 is available in 10-lead, low prole (0.75 mm)
3mm
× 3mm DFN and MSOP Exposed Pad packages.
■ Complete Linear Battery Charger with Integrated
Buck Converter
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
■ 5A Supply Current in Shutdown Mode
Switching Regulator:
■ High Efciency Synchronous Buck Converter
■ 300mA Output Current
■ 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 (23A) Burst Mode
Operation
■ 2A BAT Current in Shutdown Mode
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6522118.
500mA
4.2V
Li-Ion
BATTERY
CBAT
4.7
F
RPROG
806
R2
806k
COUT
4.7
F
4080 TA01a
CPL
10pF
R1
1M
LTC4080
EN_CHRG
EN_BUCK
MODE
SW
FB
PROG
VCC
BAT
VOUT
(1.8V/300mA)
L1, 1O
H
GND
CIN
4.7
F
VCC
(3.75V
to 5.5V)
+
LOAD CURRENT (mA)
0.01
40
EFFICIENCY
(%)
POWER
LOSS
(mW)
60
80
0.1
10
100
11000
20
0
100
0
10
100
0.1
0.01
1000
4080 TA01b
VBAT = 3.8V
VOUT = 1.8V
L = 10
H
C = 4.7
F
EFFICIENCY
(Burst)
POWER LOSS
(Burst)
EFFICIENCY
(PWM)
POWER
LOSS
(PWM)
Buck Efciency vs Load Current
(VOUT = 1.8V)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4080EMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck |
| LTC4080X | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck in 3mm × 3mm DFN |
| LTC4080XEDD#PBF | 功能描述:IC CHARGER LI-ION 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4080XEDD#TRPBF | 功能描述:IC CHARGER LI-ION 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4080XEDD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck in 3mm × 3mm DFN |
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