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| 型号： | LTC4411ES5#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC IDEAL DIODE LOW LOSS TSOT23-5 |
| 标准包装： | 1 |
| 应用： | 手持/移动设备 |
| FET 型： | P 沟道 |
| 输出数： | 1 |
| 内部开关： | 是 |
| 延迟时间 - 开启： | 1.2µs |
| 延迟时间 - 关闭： | 1.1µs |
| 电源电压： | 2.6 V ~ 5.5 V |
| 电流 - 电源： | 40µA |
| 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： | 标准包装 |
| 产品目录页面： | 1338 (CN2011-ZH PDF) |
| 其它名称： | LTC4411ES5#TRMPBFDKR |
LTC4411
BLOCK DIAGRA
+
–
IN
1
– +
P1
V GATE
5 OUT
GND
2
SHDB
OVERTEMP
CTL
3
V REF
OFF
A
UVLO
OUT MAX
4 STAT
3 μ A
V B
V B
10 μ A
4411 F02
Figure 2. Detailed Block Diagram
OPERATIO
The LTC4411 operation is described with the aid of
Figure 3. Forward regulation for the LTC4411 has three
operation modes depending on the magnitude of the load
current. For small load currents, the LTC4411 will provide
a constant voltage drop; this operating mode is referred to
as “constant V ON ” regulation. As the current exceeds I FWD
the voltage drop will increase linearly with the current with
a slope of 1/R ON ; this operating mode is referred to as
“constant R ON ” regulation. As the current increases fur-
ther, exceeding I MAX , the forward voltage drop will in-
powered from the supply at IN. As the load current varies,
V GATE will be controlled to maintain a low forward voltage
drop. If the load current exceeds P1’s ability to deliver the
current, as V GATE approaches GND, the P1 will behave as
a fixed resistor, with resistance R ON , whereby the forward
voltage will increase with increased load current. As I LOAD
increases further (I LOAD > I MAX ), the LTC4411 will regulate
the load current as described below. During the forward
regulation mode of operation the STAT pin will be an open
circuit.
crease rapidly; this operating mode is referred to as
“constant I ON ” regulation. The characteristics for the
following parameters: R FWD , R ON , V FWD , I FWD , and I MAX
are specified with the aid of Figure 3.
I OC
I MAX
3.0
2.5
2.0
T A = 40 ° C
Operation begins when the power source at IN rises above
the UVLO voltage of 2.4V (typ) and the CTL (control) pin
I FWD
1.5
LTC4411
SLOPE
1/R ON
is low. If only the voltage at the IN pin is present, the power
1.0
source to LTC4411 (V DD ) will be supplied from the IN pin.
The amplifier (A) will deliver a voltage proportional to the
0.5
SLOPE
1/R FWD
SCHOTTKY
difference between V IN and V OUT to the gate (V GATE ) of the
internal P-channel MOSFET (P1), driving this gate voltage
below V IN . This will turn on P1. As P1 conducts, V OUT will
0
0
V FWD
DIODE
0.25 0.5 0.75
FORWARD VOLTAGE (V)
1.0
4411 F03
be pulled up towards V IN . The LTC4411 will then control
V GATE to maintain a low forward voltage drop. The system
Figure 3. LTC4411 vs Schottky Diode
Forward Conduction Characteristics
is now in forward regulation and the load at OUT will be
4411fa
5
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| LTC4412ES6#TR | 功能描述:IC CTRLR LOWLOS PWRPATH TSOT23-6 RoHS:否 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:PowerPath™ 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4412ES6#TRM | 功能描述:IC CTRLR LOWLOS PWRPATH TSOT23-6 RoHS:否 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:PowerPath™ 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
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