参数资料
| 型号： | LT1121CST-5#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V .15A SOT223-3 |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 78 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 最高 30V |
| 电压 - 压降（标准）： | 0.42V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-261-4，TO-261AA |
| 供应商设备封装： | SOT-223 |
| 包装： | 管件 |
| 产品目录页面： | 1326 (CN2011-ZH PDF) |
LT1121/LT1121-3.3/LT1121-5
TYPICAL PERFORMANCE CHARACTERISTICS
Load Regulation
LT1121-5
Load Transient Response
LT1121-5
Load Transient Response
C OUT = 1 μ F
C OUT = 3.3 μ F
0
–5
–10
–15
–20
Δ I LOAD = 1mA TO 150mA
LT1121*
LT1121-3.3
V IN = 6V
0.2 C IN = 0.1 μ F
0.1
0
–0.1
–0.2
V IN = 6V
0.2 C IN = 0.1 μ F
0.1
0
–0.1
–0.2
–25
–30
LT1121-5
150
150
100
–35 * ADJ PIN TIED TO
–40
OUTPUT PIN
–50 –25 0 25
50
75
100
125
100
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
50
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
TEMPERATURE ( ° C)
PIN FUNCTIONS
1121 G28
TIME (ms)
1121 G29
TIME (ms)
1121 G30
Input Pin: Power is supplied to the device through the
input pin. The input pin should be bypassed to ground if
the device is more than six inches away from the main
input filter capacitor. In general the output impedance of
a battery rises with frequency so it is usually adviseable to
include a bypass capacitor in battery-powered circuits. A
bypass capacitor in the range of 0.1μF to 1μF is sufficient.
The LT1121 is designed to withstand reverse voltages on
the input pin with respect to both ground and the output
pin. In the case of a reversed input, which can happen if
a battery is plugged in backwards, the LT1121 will act as
if there is a diode in series with its input. There will be
no reverse current flow into the LT1121 and no reverse
voltage will appear at the load. The device will protect both
itself and the load.
Output Pin: The output pin supplies power to the load. An
output capacitor is required to prevent oscillations. See
the Applications Information section for recommended
value of output capacitance and information on reverse
output characteristics.
Shutdown Pin: This pin is used to put the device into
shutdown. In shutdown the output of the device is turned
off. This pin is active low. The device will be shut down if
the shutdown pin is pulled low. The shutdown pin current
with the pin pulled to ground will be 6μA. The shutdown
pin is internally clamped to 7V and – 0.6V (one V BE ). This
allows the shutdown pin to be driven directly by 5V logic or
by open collector logic with a pull-up resistor. The pull-up
resistor is only required to supply the leakage current of
the open collector gate, normally several microamperes.
Pull-up current must be limited to a maximum of 20mA.
A curve of shutdown pin input current as a function of
voltage appears in the Typical Performance Characteristics.
If the shutdown pin is not used it can be left open circuit.
The device will be active, output on, if the shutdown pin
is not connected.
Adjust Pin: For the adjustable LT1121, the adjust pin
is the input to the error amplifier. This pin is internally
clamped to 6V and –0.6V (one V BE ). It has a bias current
of 150nA which flows into the pin. See Bias Current curve
in the Typical Performance Characteristics. The adjust
pin reference voltage is 3.75V referenced to ground. The
output voltage range that can be produced by this device
is 3.75V to 30V.
1121fg
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1121CZ-3.3 | 功能描述:IC REG LDO 3.3V .15A TO92-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
| LT1121CZ-3.3#PBF | 功能描述:IC REG LDO 3.3V .15A TO92-3 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
| LT1121CZ-3.3#TR | 功能描述:IC REG LDO 3.3V .15A TO92-3 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
| LT1121CZ-3.3#TRPBF | 功能描述:IC REG LDO 3.3V .15A TO92-3 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:0.1V @ 200mA 稳压器数量:2 电流 - 输出:300mA 电流 - 限制（最小）:350mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-UFQFN 供应商设备封装:8-MLPQ-UT（1.5x1.5） 包装:剪切带 (CT) 产品目录页面:1358 (CN2011-ZH PDF) 其它名称:SC560HULCT |
| LT1121CZ5 | 制造商:LT 功能描述:NeW |
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