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参数资料
| 型号： | LTC4057ES5-4.2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC CHARGR BATTERY L-ION TSOT23-5 |
| 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： | 4.25 V ~ 6.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 带卷 (TR) |
LTC4057-4.2
Linear Li-Ion Battery
Charger with Thermal
Regulation in ThinSOT
FEATURES
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
Programmable Charge Current up to 800mA
No External MOSFET, Sense Resistor or Blocking
Diode Required
Constant-Current/Constant-Voltage Operation with
Thermal Regulation Maximizes Charge Rate
Without Risk of Overheating*
Charges Single Cell Li-Ion Batteries Directly from
USB Port
Preset 4.2V Charge Voltage with ± 1% Accuracy
Current Monitor Pin for Charge Termination
25 μ A Supply Current in Shutdown Mode
Low Battery Charge Conditioning (Trickle Charging)
Soft-Start Limits Inrush Current
Available in a Low Profile (1mm) SOT-23 Package
The LTC ? 4057 is a constant-current/constant-voltage lin-
ear charger for single-cell lithium-ion batteries. Its
ThinSOT TM package and low external component count
make the LTC4057 especially well suited for portable
applications. Furthermore, the LTC4057 is specifically
designed to work within USB power specifications.
No external sense resistor is needed and no blocking diode
is required due to the internal MOSFET architecture.
Thermal feedback prevents overheating by regulating the
charge current to limit the die temperature during high
power operation or high ambient temperature conditions.
The charge voltage is preset at 4.2V and the charge current
can be programmed externally with a single resistor.
Wireless PDAs
Cellular Phones
Portable Electronics
APPLICATIO S
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, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
When the input supply (wall adapter or USB supply) is
removed, the LTC4057 automatically enters a low current
state, dropping the battery drain current to less than 2 μ A.
With power applied, the LTC4057 can be put into shut-
down mode, reducing the supply current to 25 μ A.
For the standalone version (on-board charge termination)
of the LTC4057, refer to the LTC4054.
*U.S. Patent No. 6522118
TYPICAL APPLICATIO
Charge Curve (750mAh Battery)
V IN
5V
4
V CC
BAT
3
600mA
700
600
500
CONSTANT
CURRENT
CONSTANT
POWER
CONSTANT
VOLTAGE
4.75
4.5
4.25
LTC4057-4.2
ON OFF
1 μ F
1
SHDN PROG
GND
2
5
1.65k
+
1-CELL
4.2V Li-Ion
BATTERY
400
300
200
4.0
3.75
3.5
4057 TA01a
100
0
V CC = 5V
θ JA = 130 ° C/W
R PROG = 1.65k ?
T A = 25 ° C
3.25
3.0
0
0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25
TIME (HOURS)
4057 TA01b
4057f
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4058 | 制造商:LINER 制造商全称:Linear Technology 功能描述:150mA Standalone Linear Li-Ion Battery Charger in ThinSOT |
| LTC4058EDD-4.2 | 功能描述:IC CHARGER BATTERY LI-ION 8-DFN RoHS:否 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 |
| LTC4058EDD-4.2#PBF | 功能描述:IC CHARGER BATTERY LI-ION 8-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 |
| LTC4058EDD-4.2#TR | 功能描述:IC CHARGER BATTERY LI-ION 8-DFN RoHS:否 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 |
| LTC4058EDD-4.2#TRPBF | 功能描述:IC CHARGER BATTERY LI-ION 8-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 |
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