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PDF MIC39150-1.8BU Data sheet ( Hoja de datos )
| Número de pieza | MIC39150-1.8BU | |
| Descripción | 1.5A Low-Voltage Low-Dropout Regulator | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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MIC39150/39151
Micrel
MIC39150/39151
1.5A Low-Voltage Low-Dropout Regulator
General Description
The MIC39150 and MIC39151 are 1.5A low-dropout linear
voltage regulators that provide a low voltage, high current
output with a minimum of external components. Utilizing
Micrel’s proprietary Super βeta PNP™ pass element, the
MIC39150/1 offers extremely low dropout (typically 375mV at
1.5A) and low ground current (typically 17mA at 1.5A).
The MIC39150/1 is ideal for PC add-in cards that need to
convert from 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed
maximum dropout voltage of 500mV over all operating con-
ditions allows the MIC39150/1 to provide 2.5V from a supply
as low as 3V or 1.8V from a supply as low as 2.3V. The
MIC39150/1 also has fast transient response for heavy
switching applications. This device requires only 10µF of
output capacitance to maintain stability and achieve fast
transient response
The MIC39150/1 is fully protected with overcurrent limiting,
thermal shutdown, reversed-battery protection, reversed-
lead insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag that
indicates undervoltage and over current conditions. Offered
in fixed voltages of 2.5V and 1.8V, the MIC39150/1 comes in
the TO-220 and TO-263 packages and is an ideal upgrade to
older, NPN-based linear voltage regulators.
Features
• 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5 to 1.8V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery and reversed lead insertion protection
• Reversed-leakage protection
• Fast transient response
• TO-263 and TO-220 packaging
• TTL/CMOS compatible enable pin (MIC39151 only)
• Error flag output (MIC39151 only)
Applications
• Low-voltage digital ICs
• LDO linear regulator for PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Low-voltage microcontrollers
• StrongARM™ processor supply
For applications requiring input voltage greater than 16V or
automotive load dump protection, see the MIC29150/1/2/3
family.
Typical Application
VIN
3.3V
MIC39150-2.5
IN OUT
GND
VOUT
2.5V
10µF
tantalum
MIC39150
ENABLE
SHUTDOWN
VIN
3.3V
100kΩ
MIC39151-2.5
EN FLG
IN OUT
GND
ERROR FLAG
OUTPUT
VOUT
2.5V
10µF
tantalum
MIC39151
StrongARM is a trademark of Advanced RSIC Machines, Ltd.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
May 2000
1 MIC39150/39151
1 page  
MIC39150/39151
Typical Characteristics
Power Supply
Rejection Ratio
60
VIN = 3.3V
50 VOUT = 2.5V
40
30
20
ILOAD = 1.5A
10 COUT = 10µF
CIN = 0
0
1E1+01 11E0+02 1E1+k3 11E0+k4 11E00+k5 11EM+6
FREQUENCY (Hz)
Dropout Voltage
vs. Temperature
600
500
400 VOUT = 1.8V
300 VOUT = 2.5V
200
100 ILOAD = 1.5A
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
Ground Current
vs. Supply Voltage
ILOAD = 100mA
ILOAD = 10mA
2 4 6 8 10
SUPPLY VOLTAGE (V)
12
Ground Current
vs. Temperature
8
7
6 VOUT = 2.5V
5
4 VOUT = 1.8V
3
2
1 ILOAD = 750mA
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
May 2000
Power Supply
Rejection Ratio
50
40 VIN = 3.3V
VOUT = 2.5V
30
20
ILOAD = 1.5A
10 COUT = 47µF
CIN = 0
0
1E1+01 11E0+02 1E1+k3 11E0+k4 11E00+k5 11EM+6
FREQUENCY (Hz)
Dropout Characteristics
2.8
2.6
2.4 ILOAD = 100mA
2.2
2.0
1.8
1.6 ILOAD = 1.5A
1.4 ILOAD = 750mA
1.2
INPUT VOLTAGE (V)
Ground Current
vs. Supply Voltage
65
60
55
50
45
ILOAD = 1500mA
40
35
30
ILOAD = 1000mA
25
20
15
ILOAD = 750mA
10
5
0
0 2 4 6 8 10 12
SUPPLY VOLTAGE (V)
Ground Current
vs. Temperature
25
20
15
VOUT = 1.8V
10
5
VOUT = 2.5V
ILOAD = 1.5A
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
5
Micrel
Dropout Voltage
vs. Output Current
500
400
300 VOUT = 1.8V
200 VOUT = 2.5V
100
0
0
500
1000
1500
OUTPUT CURRENT (mA)
Ground Current
vs. Output Current
25
20
15
10 VOUT = 1.8V
5
VOUT = 2.5V
0
0 250 500 750 1000 1250 1500
OUTPUT CURRENT (mA)
Ground Current
vs. Temperature
0.36
0.35
0.34
0.33
VOUT = 1.8V
0.32 VOUT = 2.5V
0.31
ILOAD = 10mA
0.30
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Short Circuit vs.
Temperature
3.5
typical 2.5V device
3.0
2.5
typical 1.8V device
2.0
1.5
1.0
0.5
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
MIC39150/39151
5 Page 
MIC39150/39151
Micrel
0.065 ±0.010
20°±2°
0.405 ±0.005
0.050 ±0.005
0.360 ±0.005
0.600 ±0.025
0.100 BSC
DIM. = INCH
0.050
8° MAX
0.015 ±0.002
3-Lead TO-263 (U)
0.176 ±0.005
0.050 ±0.005
SEATING PLANE
0.004+–00..000048
0.100 ±0.01
0.065 ±0.010
20°±2°
0.405 ±0.005
0.050 ±0.005
0.360 ±0.005
0.600 ±0.025
0.067 ±0.005
DIM. = INCH
0.032 ±0.003
8° MAX
0.015 ±0.002
5-Lead TO-263-5 (U)
0.176 ±0.005
0.060 ±0.005
SEATING PLANE
0.004+–00..000048
0.100 ±0.01
May 2000
11 MIC39150/39151
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MIC39150-1.8BU.PDF ] | |
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