Datasheet > LM29150-5.0

LM29150-5.0

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
韩国泰进 - HTC		稳压器
页数	文件大小	规格书
7页	1448K
描述
1.5A Very L.D.O Voltage Regulator

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LM29150-5.0 数据手册

1.5A Very L.D.O Voltage Regulator

LM29150/1/2/3

Applications Information

The LM29150 are high performance low-dropout voltage regulators suitable for all moderate to high

-current voltage regulator applications. Their 350mV dropout voltage at full load make them

especially valuable in battery powered systems and as high efficiency noise filters in

"post-regulator" applications. Unlike older NPN-pass transistor designs, dropout performance of

the PNP output of these devices is limited merely by the low Vce saturation voltage.

The LM29150 family of regulators is fully protected from damage due to fault conditions. Current

Limiting is provided. This limiting is linear; output current under overload conditions is constant.

Thermal shutdown disables the device when the die temperature exceeds the 125℃ maximum safe

operating temperature. Transient protection allows device survival even when the input voltage

spikes between -20V and +60V. When the input voltage exceeds about 35V to 40V. The over

voltage sensor temporarily disables the regulator.

Figure 3. Linear regulators require only two capacitors

for operation.

Thermal Design

Linear regulators are simple to use. The most complicated design parameters to consider are

thermal characteristics. Thermal design requires the following application-specific parameters:

Maximum ambient temperature, T^A

Output Current, IOUT

Output Voltage, VOUT

Input Voltage, VIN

First, we calculate the power dissipation of the regulator from these numbers and the device

parameters from this datasheet.

P^D=IOUT(1.01VIN-VOUT)

Where the ground current is approximated by 1% of I^OUT. Then the heat sink thermal

resistance is determined with this formula:

Where TJ MAX≤ 125℃ and ΘCS is between 0 and 2℃/W.

Capaitor Requirements

For stability and minimum output noise,a capacitor on the regulator output is necessary. The

value of this capacitor is dependent upon the output current; lower currents allow smaller

capcitors. LM29150 regulators are stable with the 10uF minimum capacitor values at full load.

Where the regulator is powered from a source with a high AC impedance, a 0.1uF capacitor

connected between input and GND is recommended. This capacitor should have good

characteristics to above 250kHz.

Mar. 2006-Rev06

HTC

1...3 4 567

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