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| 型号： | LT3050EDDB-3.3#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/26页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .1A 12-DFN |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 45 V |
| 电压 - 压降（标准）： | 0.34V @ 100mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 100mA |
| 电流 - 限制（最小）： | 110mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN-EP（3x2） |
| 包装： | 剪切带 (CT) |
| 其它名称： | LT3050EDDB-3.3#TRMPBFCT |
LT3050 Series
APPLICATIONS INFORMATION
The LT3050 is a micropower, low noise and low dropout
voltage, 100mA linear regulator with micropower shutdown,
programmable current limit, and diagnostic functions. The
device supplies up to 100mA at a typical dropout voltage
referenced to ground. The current in R1 is then equal to
0.6V/R1, and the current in R2 is the current in R1 minus
the ADJ pin bias current.
of 340mV and operates over a 2.2V to 45V input range.
IN
OUT
V OUT
A single external capacitor can provide low noise reference
performance and output soft-start functionality. For
example, connecting a 10nF capacitor from the REF/BYP pin
to GND lowers output noise to 30μV RMS over a 10Hz to
V IN
LT3050
SHDN ADJ
GND
R2
R1
3050 F01
100kHz bandwidth. This capacitor also soft-starts the
reference and prevents output voltage overshoot at turn-on.
The LT3050’s quiescent current is merely 45μA but
V OUT = 0.6V 1 +
R2
R1
– ( I ADJ ) ? R2
provides fast transient response with a minimum low ESR
2.2μF ceramic output capacitor. In shutdown, quiescent
current is less than 1μA and the reference soft-start
capacitor is reset.
The LT3050 optimizes stability and transient response
with low ESR, ceramic output capacitors. The regulator
does not require the addition of ESR as is common with
other regulators. The LT3050 typically provides 0.1% line
regulation and 0.1% load regulation. Internal protection
circuitry includes reverse-battery protection, reverse-
output protection, reverse-current protection, current limit
with fold-back and thermal shutdown.
This “bullet-proof” protection set makes it ideal for use in
battery-powered, automotive and industrial systems.
In battery backup applications where the output is held
up by a backup battery and the input is pulled to ground,
the LT3050 acts like it has a diode in series with its output
and prevents reverse current ?ow.
Adjustable Operation
The adjustable LT3050 has an output voltage range of
0.6V to 44.5V. The output voltage is set by the ratio of
two external resistors, as shown in Figure 1. The device
V ADJ = 0.6V
I ADJ = 16nA at 25 ° C
OUTPUT RANGE = 0.6V to 44.5V
Figure 1. Adjustable Operation
The ADJ pin bias current, 16nA at 25°C, ?ows from the
ADJ pin through R1 to GND. Calculate the output voltage
using the formula in Figure 1. The value of R1 should be
no greater than 124k to provide a minimum 5μA load
current so that output voltage errors, caused by the ADJ
pin bias current, are minimized. Note that in shutdown,
the output is turned off and the divider current is zero.
Curves of ADJ Pin Voltage vs Temperature and ADJ Pin Bias
Current vs Temperature appear in the Typical Performance
Characteristics Section.
The LT3050 is tested and speci?ed with the ADJ pin tied
to the OUT pin, yielding V OUT = 0.6V. Speci?cations for
output voltages greater than 0.6V are proportional to the
ratio of the desired output voltage to 0.6V: V OUT /0.6V. For
example, load regulation for an output current change
of 1mA to 100mA is –0.2mV (typical) at V OUT = 0.6V.
at V OUT = 12V, load regulation is:
servos the output to maintain the ADJ pin voltage at 0.6V
12 V
0 . 6 V
? ( – 0 . 2 mV ) = – 4 mV
3050fa
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3050EDDB-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs |
| LT3050EDDB-5#PBF | 制造商:Linear Technology 功能描述:IC LDO VOLT REG 5V 0.1A DFN-12 制造商:Linear Technology 功能描述:IC, LDO VOLT REG, 5V, 0.1A, DFN-12 制造商:Linear Technology 功能描述:IC, LDO VOLT REG, 5V, 0.1A, DFN-12; Primary Input Voltage:45V; Output Voltage Fixed:5V; Dropout Voltage Vdo:340mV; No. of Pins:12; Output Current:100mA; Operating Temperature Min:-40C; Operating Temperature Max:125C ;RoHS Compliant: Yes |
| LT3050EDDB-5#TRMPBF | 功能描述:IC REG LDO 5V .1A 12-DFN 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 |
| LT3050EDDB-5#TRPBF | 功能描述:IC REG LDO 5V .1A 12-DFN 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 |
| LT3050EDDB-5-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs |
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