参数资料
| 型号： | LT3011EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 50MA 10-DFN |
| 产品培训模块： | LT3011 - 50mA, 3V to 80V Low Dropout Micropower Linear Regulator with PWRGD More Information on LDOs |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.24 V ~ 60 V |
| 输入电压： | 2.8 V ~ 80 V |
| 电压 - 压降（标准）： | 0.3V @ 50mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 50mA |
| 电流 - 限制（最小）： | 60mA |
| 工作温度： | -40°C ~ 125°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) |
LT3011
APPLICATIONS INFORMATION
The LT3011 is a 50mA high voltage/low dropout regulator
with micropower quiescent current and shutdown. The
device is capable of supplying 50mA at a dropout voltage of
300mV. The low operating quiescent current (46μA) drops
to 1μA in shutdown. In addition to low quiescent current,
?cations for output voltages greater than 1.24V will be
proportional to the ratio of the desired output voltage to
1.24V; (V OUT /1.24V). For example, load regulation for an
output current change of 1mA to 50mA is –6mV (typical)
at V OUT = 1.24V. At V OUT = 12V, load regulation is:
the LT3011 incorporates several protection features which
make it ideal for use in battery-powered systems. The
device is protected against both reverse input and reverse
12 V
1 . 24 V
? – 6 mV = – 58 mV
output voltages. In battery backup applications where the
output can be held up by a backup battery when the input
is pulled to ground, the LT3011 acts like it has a diode in
series with its output and prevents reverse current ?ow.
Adjustable Operation
The LT3011 has an output voltage range of 1.24V to 60V. The
output voltage is set by the ratio of two external resistors as
shown in Figure 1. The device servos the output to maintain
the voltage at the adjust pin at 1.24V referenced to ground.
The current in R1 is then equal to 1.24V/R1 and the current
in R2 is the current in R1 plus the ADJ pin bias current.
The ADJ pin bias current, 30nA at 25°C, ?ows through
R2 into the ADJ pin. The output voltage can be calculated
using the formula in Figure 1. The value of R1 should be
less than 250k to minimize errors in the output voltage
caused by the ADJ pin bias current. Note that in shutdown
the output is turned off and the divider current will be zero.
The adjustable device is tested and speci?ed with the
ADJ pin tied to the OUT pin and a 5μA DC load (unless
otherwise speci?ed) for an output voltage of 1.24V. Speci-
Output Capacitance and Transient Response
The LT3011 is designed to be stable with a wide range
of output capacitors. The ESR of the output capacitor
affects stability, most notably with small capacitors. A
minimum output capacitor of 1μF with an ESR of 3Ω or
less is recommended to prevent oscillations. The LT3011
is a micropower device and output transient response
will be a function of output capacitance. Larger values
of output capacitance decrease the peak deviations and
provide improved transient response for larger load current
changes. Bypass capacitors, used to decouple individual
components powered by the LT3011, will increase the
effective output capacitor value.
Extra consideration must be given to the use of ceramic
capacitors. Ceramic capacitors are manufactured with a
variety of dielectrics, each with different behavior across
temperature and applied voltage. The most common
dielectrics used are speci?ed with EIA temperature char-
acteristic codes of Z5U, Y5V, X5R and X7R. The Z5U and
Y5V dielectrics are good for providing high capacitances
V OUT = V ADJ 1 + R2 + (I ADJ )(R2)
V ADJ = 1.24V
R1
V IN
IN
OUT
LT3011
R2
+
V OUT
I ADJ = 30nA AT 25 C
OUTPUT RANGE = 1.24V TO 60V
GND
ADJ
R1
3011 F01
Figure 1. Adjustable Operation
3011f
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3011EMSE | 制造商:LINER 制造商全称:Linear Technology 功能描述:50mA, 3V to 80V Low Dropout Micropower Linear Regulator with PWRGD |
| LT3011EMSE#PBF | 功能描述:IC REG LDO ADJ 50MA 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:MIC5365/66 Ultra-small LDO Regulators 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.155V @ 150mA 稳压器数量:1 电流 - 输出:150mA 电流 - 限制（最小）:200mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:4-UDFN 裸露焊盘，4-TMLF? 供应商设备封装:4-TMLF?（1x1） 包装:Digi-Reel® 其它名称:576-3192-6 |
| LT3011EMSE#TRPBF | 功能描述:IC REG LDO ADJ 50MA 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:More Information on LDOs 标准包装:50 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:最高 15V 电压 - 压降（标准）:1.1V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:800mA 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-4，D²Pak（3 引线+接片），TO-263AA 供应商设备封装:D2PAK-3 包装:管件 |
| LT3011EMSEPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:50mA, 3V to 80V Low Dropout Micropower Linear Regulator with PWRGD |
| LT3011EMSETR | 制造商:LINER 制造商全称:Linear Technology 功能描述:50mA, 3V to 80V Low Dropout Micropower Linear Regulator with PWRGD |
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