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参数资料
| 型号： | LTC4080EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER LI-ION 10-DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 3.75 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
LTC4080
500mA Standalone Li-Ion
Charger with Integrated
300mA Synchronous Buck
FEATURES
DESCRIPTIO
■
Complete Linear Battery Charger with Integrated
The LTC4080 is a complete constant-current/constant-
Wireless Headsets
Bluetooth Applications
Portable MP3 Players
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
■ 5μA Supply Current in Shutdown Mode
Switching Regulator:
■ High Ef?ciency Synchronous Buck Converter
■ 300mA Output Current
■ 2.7V to 4.5V Input Range (Powered from BAT Pin)
■ 0.8V to V BAT Output Range
■ MODE Pin Selects Fixed (2.25MHz) Constant-Frequency
PWM Mode or Low I CC (23μA) Burst Mode ?
Operation
■ 2μA BAT Current in Shutdown Mode
APPLICATIO S
■
■
■
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 speci?cally
designed to work within USB power speci?cations.
The ? C ? H ? R ? G 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-
ef?ciency Burst Mode operation that can be selected by
the MODE pin.
The LTC4080 is available in 10-lead, low pro?le (0.75 mm)
3mm × 3mm DFN and MSOP Exposed Pad packages.
, 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.
■
Multifunction Wristwatches
TYPICAL APPLICATIO
Li-Ion Battery Charger with 1.8V Buck Regulator
Buck Ef?ciency vs Load Current
(V OUT = 1.8V)
100
1000
+
(Burst)
POWER LOSS
V CC
(3.75V
to 5.5V)
C IN
4.7 μ F
V CC BAT
LTC4080
EN_CHRG SW
EN_BUCK FB
MODE GND PROG
L1, 1O μ H
R PROG
806 Ω
500mA
C PL R1
10pF 1M
R2
806k
4080 TA01a
C BAT
4.7 μ F
V OUT
(1.8V/300mA)
C OUT
4.7 μ F
4.2V
Li-Ion
BATTERY
80
60
40
20
0
0.01
EFFICIENCY
EFFICIENCY
(Burst)
0.1 1 10 100 1000
100
(PWM) POWER
LOSS 10
(PWM)
0
V BAT = 3.8V 0.1
V OUT = 1.8V
L = 10 μ H
C = 4.7 μ F
0.01
LOAD CURRENT (mA)
4080 TA01b
4080fb
1
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相关代理商/技术参数 |
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| LTC4080EMSE#PBF | 功能描述:IC CHARGER LI-ION 10-MSOP 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 |
| LTC4080EMSE#TRPBF | 功能描述:IC CHARGER LI-ION 10-MSOP 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 |
| LTC4080EMSE-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 |
| 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 |
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