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LM29151R-3.3

更新时间：2025-07-03 05:32:11
品牌：HTC
描述：1.5A Very L.D.O Voltage Regulator

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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

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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  
92  
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 ]  
LM  
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  
93  
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㎃, TA=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  
94  
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  
95  
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  
96  
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, TA  
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.  
PD=IOUT(1.01VIN-VOUT)  
Where the ground current is approximated by 1% of IOUT. 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  
97  
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  
98  

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