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PDF MIC5239-3.0BS Data sheet ( Hoja de datos )
| Número de pieza | MIC5239-3.0BS | |
| Descripción | Low Quiescent Current 500mA UCap LDO Regulator | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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MIC5239
Micrel
MIC5239
Low Quiescent Current 500mA µCap LDO Regulator
Advance Information
General Description
The MIC5239 is a low quiescent current, µCap low-dropout
regulator. With a maximum operating input voltage of 30V
and a quiescent current of 23µA, it is ideal for supplying keep-
alive power in systems with high-voltage batteries.
Capable of 500mA output, the MIC5239 has a dropout
voltage of only 350mV. It can provide high output current for
applications such as USB.
As a µCap LDO, the MIC5239 is stable with either a ceramic
or a tantalum output capacitor. It only requires a 3.3µF output
capacitor for stability.
The MIC5239 includes a logic compatible enable input and an
undervoltage error flag indicator. Other features of the
MIC5239 include thermal shutdown, current-limit, overvolt-
age shutdown, load-dump protection, reverse leakage pro-
tections, and reverse battery protection.
Available in the thermally enhanced SOIC-8, MSOP-8 and
SOT-223, the MIC5239 comes in fixed 3.0V and adjustable
voltages. For other output voltages, contact Micrel.
Features
• Ultra-low quiescent current (IQ = 23µA @IO = 100µA)
• Continuious 500mA output current
• Wide input range: 2.3V to 30V
• Low dropout voltage:
350mV @500mA;
• ±1.0% initial output accuracy
• Stable with ceramic or tantalum output capacitor
• Logic compatible enable input
• Low output voltage error flag indicator
• Overcurrent protection
• Thermal shutdown
• Reverse-leakage protection
• Reverse-battery protection
• High-power SOIC-8, MSOP-8 and SOT-223 packages
Applications
• USB power supply
• Keep-alive supply in notebook and portable personal
computers
• Logic supply from high-voltage batteries
• Automotive electronics
• Battery-powered systems
Typical Application
MIC5239
VIN IN OUT
30V
EN FLG
GND
VOUT
3.0V/100µA
IGND = 23µA
Regulator with Low IO and Low IQ
40
35
IOUT = 1mA
30
25
IOUT = 100µA
20
15 IOUT = 10µA
104 9 14 19 24 29
INPUT VOLTAGE (V)
Ground Current vs. Input Voltage
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
January 2002
1
MIC5239
1 page  
MIC5239
Typical Characteristics (VO = 3V)
Power Supply
Rejection Ratio
60
ILOAD = 500mA
50
40
30
20
10
00.01 0.1 1 10 100 1000
FREQUENCY (Hz)
Dropout Voltage
vs. Output Current
450
400
350
300
250
200
150
100
50
00 100 200 300 400 500
OUTPUT CURRENT (mA)
Dropout
Characteristics
3.5
3 ILOAD = 100µA
2.5 ILOAD = 250mA
2
1.5 ILOAD = 500mA
1
0.5
00 0.5 1 1.5 2 2.5 3 3.5 4
INPUT VOLTAGE (V)
9000
8000
7000
6000
5000
4000
3000
2000
1000
00
Ground Pin Current
vs. Output Current
VIN = 4V
100 200 300 400 500
OUTPUT CURRENT (mA)
Ground Pin Current
vs. Temperature
80
75
70
65
60
55
ILOAD = 10mA
5-040 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Ground Pin Current
vs. Input Voltage
100
90 IOUT = 10mA
80
70
60
50 IOUT = 1mA
40
IOUT = 100µA
30
20
10 IOUT = 10µA
10.5 2 2.5 3 3.5
INPUT VOLTAGE (V)
4
January 2002
Ground Pin Current
vs. Temperature
3
2.9 ILOAD = 250mA
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
-240 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Ground Pin Current
vs. Input Voltage
14.4
12.4
10.4
8.4
IOUT=500mA
6.4
4.4 IOUT = 250mA
2.4
0.14.5
2 2.5 3 3.5
INPUT VOLTAGE (V)
4
5
Micrel
Dropout Voltage
vs. Temperature
600
500 IOUT = 500mA
400
300
200
100
-040 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Ground Pin Current
vs. Output Current
30
28
26 VIN = 24V
24
VIN = 30V
22
20
18 VIN = 12V
16
VIN = 4V
14
12
100 100 200 300 400 500
OUTPUT CURRENT (µA)
Ground Pin Current
vs. Temperature
10.5
10 ILOAD = 500mA
9.5
9
8.5
8
7.-540 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Ground Pin Current
vs. Input Voltage
40
35
IOUT = 1mA
30
25
IOUT = 100µA
20
15 IOUT = 10µA
104 9 14 19 24 29
INPUT VOLTAGE (V)
MIC5239
5 Page 
MIC5239
Package Information
3.15 (0.124)
2.90 (0.114)
CL
CL
3.71 (0.146) 7.49 (0.295)
3.30 (0.130) 6.71 (0.264)
2.41 (0.095)
2.21 (0.087)
4.7 (0.185)
4.5 (0.177)
0.10 (0.004)
0.02 (0.0008)
6.70 (0.264)
6.30 (0.248)
1.04 (0.041)
0.85 (0.033)
1.70
1.52
(0.067)
(0.060)
16°
10°
10°
MAX
0.84 (0.033)
0.64 (0.025)
SOT-223 (S)
DIMENSIONS:
MM (INCH)
0.38 (0.015)
0.25 (0.010)
0.91 (0.036) MIN
0.122 (3.10)
0.112 (2.84)
0.036 (0.90)
0.032 (0.81)
0.199 (5.05)
0.187 (4.74)
DIMENSIONS:
INCH (MM)
0.120 (3.05)
0.116 (2.95)
0.043 (1.09)
0.038 (0.97)
0.012 (0.30) R
0.007 (0.18)
0.005 (0.13)
0.012 (0.03)
0.0256 (0.65) TYP
0.008 (0.20)
0.004 (0.10)
5° MAX
0° MIN
8-Lead MSOP (MM)
0.012 (0.03) R
0.039 (0.99)
0.035 (0.89)
0.021 (0.53)
Micrel
January 2002
11
MIC5239
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MIC5239-3.0BS.PDF ] | |
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