首页 > LM29151R-3.3

LM29151R-3.3

更新时间：2024-09-18 05:32:11

品牌：HTC

描述：1.5A Very L.D.O Voltage Regulator

PDF下载

中文翻译

PCB计价

概述
数据手册

如果您发现信息不准确，欢迎纠错

LM29151R-3.3 概述

1.5A Very L.D.O Voltage Regulator 1.5A非常L.D.O稳压器

LM29151R-3.3 数据手册

通过下载LM29151R-3.3数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。

PDF下载

1.5A Very L.D.O Voltage Regulator

LM29150/1/2/3

FEATURES

TO-220 3/5L

● High Current Capability 1.5A

● Low Dropout Voltage 350mV

● Low Ground Current

● Accurate 1% Cuaranteed Tolerance

● Extremely Fast Transient Response

● Reverse-Battery and "Load Dump" Rotection

● Zero-Current Shutdown Mode(5-Pin Version)

● Error Flag Signals Output out-of-Regulation

(5-Pin Versions)

● Also Characterized For Smaller Loads With Industry

-Leading Performance specifications

● Fixed Voltage and Adjustable Versions

TO-252 3/5L

APPLICATIONS

● Battery Powered Equipment

● High-Efficiency " Green" Computer System

● Automotive Electronics

TO-263 3/5L

● High-Efficiency Linear Power Supplies

● High-Efficiency Post-Regulator For

Switching Supply

Pinout

ORDERING INFORMATION

Marking

Device

LM29150 - X.X

LM29150RS - X.X

LM29150R - X.X

LM29151 - X.X

LM29151RS - X.X

LM29151R - X.X

LM29152/3

Package

LM29150: Three Therminal Devices

Pin 1= Input, 2= Ground, 3= Output

TO-220 3L

TO-252 3L

TO-263 3L

TO-220 5L

TO-252 5L

TO-263 5L

TO-220 5L

TO-252 5L

TO-263 5L

LM29150 - X.X

LM29151: Five Therminal Fixed Voltage Devices

Pin 1= Enable, 2= Input, 3=Ground, 4=Output, 5= Flag

LM29152: Adjustable with ON/OFF control

Pin 1= Enable, 2= Input, 3=Ground, 4=Output, 5= Adjust

LM29153: Adjustable with Flag

LM29151 - X.X

LM29152/3

Pin 1= Flag, 2= Input, 3=Ground, 4=Output, 5= Adjust

LM29152RS/3RS - X.X

LM29152R/3R

* LM29150 - X.X (X.X = Output Voltage = 2.5, 3.3, 5.0, 12V)

* LM29151 - X.X (X.X = Output Voltage = 1.5V, 2.5V, 3.0V, 3.3V, 5.0V, 12V

DESCRIPTION

The LM29150 are high current, high accuracy, low-dropout voltage regulators. Using process with a PNP pass

element, these regulators feature 350mV (full load) dropout voltages and very low ground current.

These devices also find applications in lower current, low dropout-critical systems, where their tiny dropout

voltage and graound current values are important attributes.

The LM29150 are fully protected against over current faults, reversed input polarity, reversed lead insertion,

over temperature operation, and positive and negative transient voltage spikes. Five pin fixed voltage versions

feature logic level ON/OFF control and an error flag which signals whenever the output falls out of regulation.

On the LM29150 and LM29152, the ENABLE pin may be tied to Vin if it is not required for ON/OFF control.

The LM29150 are available in 3- and 5- pinTO-220 and surface mount TO-263 packages.

Mar. 2006-Rev06

HTC

1.5A Very L.D.O Voltage Regulator

LM29150/1/2/3

Block Diagram and typical Application Circuit

* Feed Back network in fixed versions only

**Adjustable version only

[ Block Diagram ]

Vout=1.240V x [1+(R1/R2)]

Figure2. Adjstable output voltage

configuration. For best results, the total

series resistance should be small enough to

pass the minimum regulator load current

Mar. 2006-Rev06

HTC

1.5A Very L.D.O Voltage Regulator

LM29150/1/2/3

ABSOULTE MAXIMUM RATINGS

CHARACTERISTIC

Lead Temperature(Soldering, 5 Seconds)

Storage Temperature Range

Internally Limit

260℃

-65℃ to + 150℃

-20℃ to + 60℃'

Input Supply Voltage(Note 1)

OPERATING RATINGS

CHARACTERISTIC

Operating Junction Temperature

Internally Limit

-40℃ to + 125℃'

26V

Maximum Operating Input Voltage

ELECTRICAL CHARACTERISTICS I _OUT=100㎃, T_A=25℃, unless otherwise specified

All measurements at Tj=25℃ unless otherwise noted. Bold Values are guaranteed across the

operating temperature range.

Adjustable versions are programmed to 5.0V

LM29150

LM29152

Mar. 2006-Rev06

HTC

1.5A Very L.D.O Voltage Regulator

LM29150/1/2/3

LM29151 / LM29153

LM29151 / LM29152

[ Note. ]

1. Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle(≤1%).

The maximum continuous supply voltage is 26V

2. Full load current(IFL ) is defined as 1.5A

3. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal

value with Vout to Vin

4. Vin = Vout(nominal) +1V. For example, use Vin =4.3V for a 3.3V regulator or use 6V for a 5V regulator.

Employ pulse-testing procedures to minimize temperature rise.

5. Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the

load current plus the ground pin current.

6. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total

temperature range.

7. Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is

applied, excluding load or line regulation effects. Specifications are for a 200mA load pulse at Vin= 20V (a 4W

pulse) for T= 10ms

8. Vref ≤ Vout ≤ (Vin -1V), 2.3V ≤ Vin ≤ 26V, 10mA＜IL IFL, TJ＜ TJ Max

9. Comparator thresholds are expressed in terms of a voltage differential at the Adjust terminal below the nominal

reference voltage measured at. 6V input. To express these thresholds in terms of output voltage change,

multiply by the error amplifier gain = Vout/Vref = (R1 +R2)/R2. For example, at a programmed output voltage of

5V, the Error output is guaranteed to go low when the output drops by 95mV x 5V/ 1.240V - 384mV.

Thresholds remain constant as a percent of Vout as Vout is varied, with the dropout warining occurring at

typically 5% below nominal, 7.7% guaranteed.

10. Ven ≤ 0.8V and Vin≤26V, Vout=0

11. When used in dual supply system where the regulator load is returned to a negative supply, the output

Voltage must be diode clamped to ground.

Mar. 2006-Rev06

HTC

1.5A Very L.D.O Voltage Regulator

LM29150/1/2/3

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 1. LM29150 Dropout Voltage vs,

Output Current

Figure 2. LM29150 Dropout Voltage vs,

Figure 3. LM29150- 5.0 Dropout

Characteristics

Temperature

Figure 4. LM29150 Ground Current vs,

Supply Voltage

Figure 5. LM29150 Ground Current vs,

Temperature

Figure 6. LM29150 Ground Current vs,

Temperature

Figure 7. LM29150-3.3 Output Voltage vs.

Temperature

Figure 8. LM29150-3.3 Short Circuit

Current vs. Temperature

Figure 9. LM29150 Ground Current vs.

Input Voltage

Mar. 2006-Rev06

HTC

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

1.5A Very L.D.O Voltage Regulator

LM29150/1/2/3

Minimum Load Current

The LM29150 regulators are specified between finite loads. If the output is too small, leakage

currents is too small, leakage currents dominate and the output voltage rises. The 5mA minimum

load current swamps any expected leakage current across the operating temperature range.

Adjustable Regulator Design

Figure 4.

Adjustable Regulator with Resistors

VOUT=1.240V x [ 1+(R1/R2)]

The adjustable regulator versions, LM29152 and LM29153, allow programming the output voltage

anywhere between 1.25V and the 26V maximum operating rating of the family.

Two resistors are used. Resistors can be quite large, up to 1MΩ, because of the very high input

impedance and low bias current of the sense comparator: The resistor values are calculated by:

Where is VO the desired output voltage. Figure 4 shows component definition. Applications with

widely varying load currents may scale the resistors to draw the minimum load current required for

proper operation.

Error Flag

LM29151 and LM29153 versions feature and Error Flag, which looks at the output voltage and

signals and error condition when this voltage and signals an error condition when this voltage

drops 5% below its expected value. The error flag is an open-collector output that pulls low

under fault conditions. It may sink 10mA. Low output voltage signifies a number of possible

problems, including an over-current fault (the device is in current limit) and low input voltage.

The flag output is inoperative during over temperature shutdwon conditions.

Enable input

LM29151 and LM29152 versions feature and enable (EN) input that allows ON/OFF control of the

device. Special design allows "zero" current drain when the device is disabled-only microamperes

of leakage current flows. The EN input has TTL/CMOS compatible thresholds for simple interfacing

with logic, or may be directly tied to ≤ 30V. Enabling the regulator requires approximately 20uA of

current.

Mar. 2006-Rev06

HTC

LM29151R-3.3 相关器件

型号	制造商	描述	价格	文档
LM29151R-5.0	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151RS-1.5	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151RS-1.8	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151RS-12	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151RS-2.5	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151RS-3.0	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151RS-3.3	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151RS-5.0	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151T-1.5	HTC	1.5A Very L.D.O Voltage Regulator	获取价格
LM29151T-1.8	HTC	1.5A Very L.D.O Voltage Regulator	获取价格