参数资料
| 型号： | LT3070IUFD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 23/28页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 5A 28QFN |
| 产品培训模块： | LT3070 - 5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator |
| 标准包装： | 73 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.8 V ~ 1.8 V |
| 输入电压： | 0.95 V ~ 3 V |
| 电压 - 压降（标准）： | 0.085V @ 5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 5A |
| 电流 - 限制（最小）： | 5.1A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN（4x5） |
| 包装： | 管件 |
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LT3070
APPLICATIONS INFORMATION
Keep this ballast trace area free of solder to maintain a
controlled resistance.
Table 4 shows a simple guideline for PCB trace resistance
as a function of weight and trace width.
Table 4. PC Board Trace Resistance
WEIGHT (Oz) 100 MIL WIDTH* 200 MIL WIDTH*
1 5.43 2.71
2 2.71 1.36
*Trace resistance is measured in milliohms/in
Quieting the Noise
The LT3070 offers numerous noise performance advan-
tages. Each LDO has several sources of noise. An LDO’s
most critical noise source is the reference, followed by
the LDO error amplifier. Traditional low noise regulators
buffer the voltage reference out to an external pin (usually
through a large value resistor) to allow for bypassing and
noise reduction of reference noise. The LT3070 deviates
from the traditional voltage reference by generating a
low voltage V REF from a reference current into an inter-
nal resistor ? 19k. This intermediate impedance node
(REF/BYP) facilitates external filtering directly. A 10nF filter
capacitor minimizes reference noise to 10μV RMS at the
600mV REF/BYP pin, equivalently a 17μV contribution to
output noise at V OUT = 1V. See the Typical Performance
Characteristics for Noise vs Output Voltage performance
as a function of C REF/BYP .
This approach also accommodates reference sharing
between LT3070 regulators that are hooked up in cur-
rent sharing applications. The REF/BYP filter capacitor
delays the initial power-up time by a factor of the RC time
constant. V REF remains active in nap mode, thus start-up
time is significantly reduced and well controlled coming
out of nap mode (EN:LO ↑ HI).
V BIAS
2.5V TO 3.6V
2.2μF
50k
PWRGD
V IN
1.5V
330μF
IN
EN
V O0
V O1
V O2
BIAS
PWRGD
SENSE
LT3070 OUT
2.2μF*
4.7μF*
10μF*
V OUT
1.2V
5A
NC
NC
MARGSEL
MARGTOL
VIOC
REF/BYP
*X5R OR X7R CAPACITORS
1nF
GND
0.01μF
3070 F06
Figure 6. 1.5V to 1.2V Linear Regulator
3070fb
For more information www.linear.com/LT3070
23
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3070IUFDTR | 制造商:LINER 制造商全称:Linear Technology 功能描述:5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator |
| LT3070IUFDTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator |
| LT3070MPUFD | 制造商:LINER 制造商全称:Linear Technology 功能描述:5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator |
| LT3070MPUFD#PBF | 功能描述:IC REG LDO ADJ 5A 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 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:带卷 (TR) |
| LT3070MPUFD#TRPBF | 功能描述:IC REG LDO ADJ 5A 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 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:带卷 (TR) |
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