1.5A Very L.D.O Voltage Regulator
FEATURES
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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
LM29150/1/2/3
TO-220 3/5L
(5-Pin Versions)
● Also Characterized For Smaller Loads With Industry
-Leading Performance specifications
● Fixed Voltage and Adjustable Versions
TO-252 3/5L
APPLICATIONS
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Battery Powered Equipment
High-Efficiency " Green" Computer System
Automotive Electronics
High-Efficiency Linear Power Supplies
High-Efficiency Post-Regulator For
Switching Supply
TO-263 3/5L
ORDERING INFORMATION
Device
Marking
Pinout
Package
LM29150: Three Therminal Devices
LM29150 - X.X
Pin 1= Input, 2= Ground, 3= Output
TO-220 3L
LM29150RS - X.X
LM29150 - X.X
TO-252 3L
LM29151: Five Therminal Fixed Voltage Devices
LM29150R - X.X
Pin 1= Enable, 2= Input, 3=Ground, 4=Output, 5= Flag
TO-263 3L
LM29151 - X.X
TO-220 5L
LM29152: Adjustable with ON/OFF control
Pin 1= Enable, 2= Input, 3=Ground, 4=Output, 5= Adjust
LM29151RS - X.X
LM29151 - X.X
TO-252 5L
LM29151R - X.X
LM29153: Adjustable with Flag
TO-263 5L
Pin 1= Flag, 2= Input, 3=Ground, 4=Output, 5= Adjust
LM29152/3
TO-220 5L
LM29152RS/3RS - X.X
LM29152/3
TO-252 5L
LM29152R/3R
TO-263 5L
* 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.
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1.5A Very L.D.O Voltage Regulator
Block Diagram and typical Application Circuit
LM29150/1/2/3
94
* 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
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1.5A Very L.D.O Voltage Regulator
ABSOULTE MAXIMUM RATINGS
CHARACTERISTIC
Lead Temperature(Soldering, 5 Seconds)
Storage Temperature Range
Input Supply Voltage(Note 1)
LM29150/1/2/3
Internally Limit
260℃
-65℃ to + 150℃
-20℃ to + 60℃'
OPERATING RATINGS
CHARACTERISTIC
Operating Junction Temperature
Maximum Operating Input Voltage
Internally Limit
-40℃ to + 125℃'
26V
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
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1.5A Very L.D.O Voltage Regulator
LM29151 / LM29153
LM29150/1/2/3
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.
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1.5A Very L.D.O Voltage Regulator
TYPICAL PERFORMANCE CHARACTERISTICS
LM29150/1/2/3
Figure 1. LM29150 Dropout Voltage vs,
Output Current
Figure 2. LM29150 Dropout Voltage vs,
Temperature
Figure 3. LM29150- 5.0 Dropout
Characteristics
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
96
HTC
51单片机
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