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参数资料
| 型号： | LTC4066EPF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | IC USB POWER MANAGER 24-UTQFN |
| 标准包装： | 2,500 |
| 功能： | 电源管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 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： | 24-UFQFN 裸露焊盘 |
| 供应商设备封装： | 24-UTQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
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LTC4066/LTC4066-1
APPLICATIONS INFORMATION
In USB applications, the minimum value for R CLPROG
should be 2.1k. This will prevent the application current
from exceeding 500mA due to LTC4066/LTC4066-1 toler-
ances and quiescent currents. A 2.1k CLPROG resistor will
give a typical current limit of 476mA in high power mode
(HPWR = 1) or 95mA in low power mode (HPWR = 0).
V CLPROG will typically servo to 1V; however, if I OUT + I BAT
< I CL then V CLPROG will track the input current according
to the following equation:
ideal diode circuit (along with the recommended 4.7μF
capacitor on the OUT pin) allows the LTC4066/LTC4066-1
to handle large transient loads and wall adapter or USB
V BUS connect/disconnect scenarios without the need for
large bulk capacitors. The ideal diode responds within a
few microseconds and prevents the OUT pin voltage from
dipping below the BAT pin voltage by more than 50mV.
Forward regulation for the ideal diode from BAT to OUT
has three operational ranges, depending on the magni-
I IN =
V CLPROG
R CLPROG
? 1000
tude of the diode load current. For small load currents,
the LTC4066/LTC4066-1 will provide a constant voltage
drop; this operating mode is referred to as “constant
For best stability over temperature and time, 1% metal
?lm resistors are recommended.
Ideal Diode from BAT to OUT
If a battery is the only power supply available or if the load
current exceeds the programmed input current limit, then
the battery will automatically deliver power to the load via
an ideal diode circuit between the BAT and OUT pins. The
V ON ” regulation. As the current exceeds I FWD the voltage
drop will increase linearly with the current with a slope of
1/R DIO(ON) ; this operating mode is referred to as “constant
R ON ” regulation. As the current increases further, exceeding
I MAX , the forward voltage drop will increase rapidly; this
operating mode is referred to as “constant I ON ” regulation.
The characteristics for parameters R FWD , R ON , V FWD and
I FWD are speci?ed with the aid of Figure 3.
I MAX
LTC4066
SLOPE: 1/R DIO(ON)
CONSTANT
I ON
CONSTANT
R ON
I FWD
SCHOTTKY
SLOPE: 1/R FWD
DIODE
CONSTANT
V ON
0
V FWD
FORWARD VOLTAGE (V)
4066 F03
Figure 3. LTC4066/LTC4066-1 vs Schottky Diode Forward Voltage Drop
4066fc
16
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相关代理商/技术参数 |
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|---|---|
| LTC4066EUF#PBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4066EUF#TRPBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4066EUF-1#PBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4066EUF-1#TRPBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4067 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with OVP and Li-Ion/Polymer Charger |
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