L2AA_mic5235.pdf

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MIC5235
Micrel
MIC5235
Ultra-Low Quiescent Current, 150mA
Cap LDO Regulator
General Description
The MIC5235 is a 150mA highly accurate, low dropout
regulator with high input voltage and ultra-low ground current.
This combination of high voltage and low ground current
makes the MIC5235 ideal for USB and portable electronics
applications, using 1-cell, 2-cell or 3-cell Li-Ion battery inputs.
A
Features
•
Wide input voltage range: 2.3V to 24V
•
Ultra low ground current: 18
A
•
Low dropout voltage: 310mV at 150mA
•
High output accuracy:
2.0% over temperature
•
Cap: stable with ceramic or tantalum capacitors
• Excellent line and load regulation specifications
• Zero shutdown current
• Reverse battery protection
• Reverse leakage protection
• Thermal shutdown and current limit protection
• IttyBitty™ SOT-23-5 package
Applications
•
Cap LDO design, the MIC5235 is stable with either
ceramic or tantalum output capacitor. It only requires a 2.2
F
capacitor for stability.
Features of the MIC5235 includes enable input, thermal
shutdown, current limit, reverse battery protection, and
reverse leakage protection.
Available in fixed and adjustable output voltage versions, the
MIC5235 is offered in the IttyBitty™ SOT-23-5 package with
a junction temperature range of –40
USB power supply
C to +125
C.
•
Cellular phones
•
Keep-alive supply in notebook and portable computers
•
Logic supply for high-voltage batteries
•
Automotive electronics
•
Battery powered systems
Ordering Information
Part Number
Marking
Voltage
Junction Temp. Range
Package
MIC5235-1.5BM5
L215
1.5V
–40 ° C to +125 °
C
SOT-23-5
MIC5235-1.8BM5
L218
1.8V
–40
C to +125
C
SOT-23-5
MIC5235-2.5BM5
L225
2.5V
–40 ° C to +125 °
C
SOT-23-5
MIC5235-2.7BM5
L227
2.7V
–40 ° C to +125 °
C
SOT-23-5
MIC5235-3.0BM5
L230
3.0V
–40 ° C to +125 °
C
SOT-23-5
MIC5235-3.3BM5
L233
3.3V
–40
C to +125
C
SOT-23-5
MIC5235-5.0BM5
L250
5.0V
–40 ° C to +125 °
C
SOT-23-5
MIC5235BM5
L2AA
ADJ.
–40 ° C to +125 °
C
SOT-23-5
Typical Application
40
35
MIC5235BM5
V IN
V OUT =1.8V
1
5
30
I OUT = 1mA
2
3
R 1
C OUT =2.2 µ
F
I OUT = 100
A
C IN =1.0 µ
F
25
ceramic
I GND =18 µ
4
A
OFF ON
EN
R 2
20
15
I OUT = 10
A
10
4
9
14
19
24
Ultra-Low Current Adjustable Regulator Application
INPUT VOLTAGE (V)
Ground Current vs. Input Voltage
IttyBitty is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
August 2003
1
MIC5235
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MIC5235
Micrel
Pin Configuration
EN
GND
IN
3
2
1
L2xx
4
5
NC or
ADJ.
OUT
SOT-23-5
Pin Description
SOT-23-5
Pin Name
Pin Function
1
IN
Supply Input
2
GND
Ground
3
EN
Enable (Input): Logic low = shutdown; logic high = enable
4
NC (fixed)
No Connect
ADJ (ADJ.)
Adjust (Input): Feedback input. Connect to resistive voltage-divider network.
5
OUT
Regulator Output
MIC5235
2
August 2003
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MIC5235
Micrel
Absolute Maximum Ratings (Note 1)
Input Supply Voltage ....................................... –20V to 38V
Enable Input Voltage ...................................... –0.3V to 38V
Power Dissipation .................................... Internally Limited
Junction Temperature .............................. –40
Operating Ratings (Note 2)
Input Supply Voltage ........................................ 2.3V to 24V
Enable Input Voltage ........................................... 0V to 24V
Junction Temperature (T J ) ....................... –40
C to +125
C
C to +125
C
Package Thermal Resistance
SOT-23-5
JA ) .................................................. 235
C/W
Storage Temperature ............................... –65
C to +150
C
ESD Rating, Note 3
Electrical Characteristics (Note 4)
T A = 25 ° C with V IN = V OUT + 1V; I OUT = 100 µ
A , Bold values indicate –40 °
C<T J < +125 ° C; unless otherwise specified.
Parameter
Condition
Min.
Typ.
Max.
Units
Output Voltage Accuracy
Variation from nominal V OUT
–1.0
+1.0
%
–2.0
+2.0
%
Line Regulation
V IN = V OUT + 1V to 24V
0.04
%
Load Regulation
Load = 100 µ
A to 150mA
0.25
1
%
Dropout Voltage
I OUT = 100
A
50
mV
I OUT = 50mA
230
300
mV
400
mV
I OUT = 100mA
270
400
mV
450
mV
I OUT = 150mA
310
450
mV
500
mV
Ground Current
I OUT = 100 µ
A
18
30
A
35
A
I OUT = 50mA
0.35
0.7
mA
I OUT = 100mA
1
2
mA
I OUT = 150mA
2
4
mA
Ground Current in Shutdown
V EN ≤
0.6V; V IN = 24V
0.1
1
A
Short Circuit Current
V OUT = 0V
350
500
mA
Output Leakage,
Load = 500 Ω
; V IN = –15V
–0.1
A
Reverse Polarity Input
Enable Input
Input Low Voltage
Regulator OFF
0.6
V
Input High Voltage
Regulator ON
2.0
V
Enable Input Current
V EN = 0.6V; Regulator OFF
–1.0
0.01
1.0
A
V EN = 2.0V; Regulator ON
0.1
1.0
A
V EN = 24V; Regulator ON
0.5
2.5
A
Note 1.
Exceeding the absolute maximum rating may damage the device.
Note 2.
The device is not guaranteed to function outside its operating rating.
Note 3.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 4.
Specification for packaged product only.
August 2003
3
MIC5235
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MIC5235
Micrel
Typical Characteristics
Power Supply
Rejection Ratio
I LOAD = 150mA
Dropout Voltage
vs. Output Current
Dropout Voltage
vs. Temperature
70
350
500
450
I OUT = 150mA
60
300
400
50
250
350
300
40
200
250
30
150
200
20
150
100
100
10
50
50
0
0
0
0.01
0.1
1
10
100
1000
0
20
40
60
80 100 120 140 160
-40 -20
0
20
40
60
80 100 120
FREQUENCY (kHz)
OUTPUT CURRENT (mA)
TEMPERATURE (
C)
Ground Pin Current
vs. Output Current
Dropout
Characteristics
Ground Pin Current
vs. Output Current
3.5
3000
30
28
I LOAD = 100
A
V IN = 4V
3
2500
26
I LOAD = 75mA
2.5
V IN = 24V
24
2000
V IN = 12V
22
2
1500
20
1.5
18
I LOAD = 150mA
1000
V IN = 4V
16
1
14
500
0.5
12
0
0
10
0
20
40
60
80 100 120 140 160
0
0.5
1
1.5
2
2.5
3
3.5
4
0
100
200
300
400
500
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (
A)
Ground Pin Current
vs. Temperature
Ground Pin Current
vs. Temperature
Ground Pin Current
vs. Temperature
80
700
2.5
680
2.4
I LOAD = 10mA
I LOAD = 75mA
I LOAD = 150mA
75
660
2.3
70
640
2.2
65
620
2.1
60
600
2
1.9
580
55
560
1.8
50
540
1.7
45
520
1.6
40
500
1.5
-40 -20
0
20
40
60
80 100 120
-40 -20
0
20
40
60
80 100 120
-40 -20
0
20
40
60
80 100 120
TEMPERATURE (
C)
TEMPERATURE (
C)
TEMPERATURE (
C)
Ground Pin Current
vs. Input Voltage
Ground Pin Current
vs. Input Voltage
Ground Pin Current
vs. Input Voltage
100
2.4
40
90
I OUT = 10mA
2.2
I OUT =150mA
80
35
2
70
1.8
30
60
I OUT = 1mA
1.6
I OUT = 1mA
I OUT = 100
A
50
I OUT = 100
A
1.4
25
40
1.2
30
20
1
20
I OUT = 75mA
0.8
15
10
I OUT = 10
A
I OUT = 10
A
0.6
0
1.5
2
2.5
3
3.5
4
0.4
10
1.5
2
2.5
3
3.5
4
4
9
14
19
24
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
MIC5235
4
August 2003
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MIC5235
Micrel
Input Current
vs. Supply Voltage
Output Voltage
vs. Temperature
I LOAD = 100
Short Circuit Current
vs. Temperature
120
3.05
400
A
3.04
350
100
3.03
300
3.02
80
250
3.01
60
3
200
2.99
150
40
V EN = 5V
R LOAD = 30
2.98
100
2.97
20
V IN = 4V
50
2.96
0
2.95
0
-20
-10
0
10
-40 -20
0
20
40
60
80 100 120
-40 -20
0
20
40
60
80 100 120
SUPPLY VOLTAGE (V)
TEMPERATURE (
C)
TEMPERATURE (
C)
Load Transient Response
150mA
0mA
V IN = 4V
V OUT = 3V
C OUT = 4.7
F ceramic
TIME (400
s/div.)
August 2003
5
MIC5235
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