MIC5233
Micrel
MIC5233
High Input Voltage, Low IQ
µ
Cap LDO Regulator
General Description
The MIC5233 is a 100mA 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 MIC5233 ideal for multi-cell Li-Ion battery
systems.
A
µCap
LDO design, the MIC5233 is stable with either
ceramic or tantalum output capacitor. It only requires a 2.2µF
capacitor for stability.
Features of the MIC5233 include enable input, thermal shut-
down, current limit, reverse battery protection, and
reverse leakage protection.
Available in fixed and adjustable output voltage versions, the
MIC5233 is offered in the IttyBitty™ SOT-23-5 package with
a junction temperature range of –40°C to +125°C.
Features
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•
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•
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Wide input voltage range: 2.3V to 36V
Ultra low ground current: 18µA
Low dropout voltage of 270mV at 100mA
High output accuracy of
±2.0%
over temperature
µCap:
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
Keep-alive supply in notebook and portable computers
USB power supply
Logic supply for high-voltage batteries
Automotive electronics
Battery powered systems
3-4 cell Li-Ion battery input range
Applications
Ordering Information
Part Number
MIC5233-1.8BM5
MIC5233-2.5BM5
MIC5233-3.0BM5
MIC5233-3.3BM5
MIC5233-5.0BM5
MIC5233BM5
Marking
L318
L325
L330
L333
L350
L3AA
Voltage
1.8V
2.5V
3.0V
3.3V
5.0V
ADJ.
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Typical Application
GROUND CURRENT (µA)
40
35
30
25
20
15
10
4
I
OUT
= 10µA
8 12 16 20 24 28 32 36 40
INPUT VOLTAGE (V)
I
OUT
= 1mA
V
IN
C
IN
=1.0µF
OFF ON
MIC5233BM5
1
2
3
4
5
V
OUT
R
1
R
2
C
OUT
=2.2µF
ceramic
I
GND
=18µA
I
OUT
= 100µA
EN
Ultra-Low Current Adjustable Regulator Application
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
MIC5233
MIC5233
Micrel
Pin Configuration
EN GND IN
3
2
1
L3xx
4
5
NC or
ADJ.
OUT
SOT-23-5
Pin Description
SOT-23-5
1
2
3
4
5
Pin Name
IN
GND
EN
NC (fixed)
ADJ (ADJ.)
OUT
Pin Function
Supply Input.
Ground.
Enable (Input): Logic low = shutdown; logic high = enable
No Connect.
Adjust (Input): Feedback input. Connect to resistive voltage-divider network.
Regulator Output.
MIC5233
2
August 2003
MIC5233
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°C to +125°C
Storage Temperature ............................... –65°C to +150°C
ESD Rating,
Note 3
Operating Ratings
(Note 2)
Input Supply Voltage ........................................ 2.3V to 36V
Enable Input Voltage ........................................... 0V to 36V
Junction Temperature (T
J
) ....................... –40°C to +125°C
Package Thermal Resistance
SOT-23-5
(θ
JA
) .................................................. 235°C/W
Electrical Characteristics
(Note 4)
T
A
= 25°C with V
IN
= V
OUT
+ 1V; I
OUT
= 100µA; V
EN
≥
2V;
Bold
values indicate –40°C < T
J
< +125°C; unless otherwise specified.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Dropout Voltage
Condition
Variation from nominal V
OUT
V
IN
= V
OUT
+ 1V to 36V
I
OUT
= 100µA to 100mA
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 100mA
Ground Current
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 100mA
Ground Current in Shutdown
Short Circuit Current
Output Leakage,
Reverse Polarity Input
Enable Input
Input Low Voltage
Input High Voltage
Enable Input Current
Regulator OFF
Regulator ON
V
EN
= 0.6V; Regulator OFF
V
EN
= 2.0V; Regulator ON
V
EN
= 36V; Regulator ON
2.0
–1.0
0.01
0.1
0.5
1.0
1.0
2.5
0.6
V
V
µA
µA
µA
V
EN
≤
0.6V; V
IN
= 36V
V
OUT
= 0V
Load = 500Ω; V
IN
= –15V
Min
–1.0
–2.0
0.04
0.25
50
230
270
18
0.35
1
0.1
190
–0.1
Typ
Max
+1.0
+2.0
0.5
1
300
400
400
450
30
35
0.70
2
1
350
Units
%
%
%
%
mV
mV
mV
mV
mV
µA
µA
mA
mA
µA
mA
µA
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Specification for packaged product only.
August 2003
3
MIC5233
MIC5233
Micrel
Typical Characteristics
Power Supply
Rejection Ratio
70
60
50
PSRR (dB)
DROPOUT VOLTAGE (mV)
Dropout Voltage
vs. Output Current
350
DROPOUT VOLTAGE (mV)
Dropout Voltage
vs. Temperature
500
450
400
350
300
250
200
150
100
50
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
I
OUT
= 100mA
I
OUT
= 100mA
300
250
200
150
100
50
0
0
20
40
60
80
100
OUTPUT CURRENT (mA)
40
30
20
10
0
0.01
0.1
1
10
100
FREQUENCY (kHz)
1000
Dropout
Characteristics
3.5
GROUND CURRENT (µA)
OUTPUT VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0 0.5 1 1.5 2 2.5 3 3.5 4
INPUT VOLTAGE (V)
I
LOAD
= 100mA
I
LOAD
= 100µA
I
LOAD
= 50mA
1000
900
800
700
600
500
400
300
200
100
0
Ground Pin Current
vs. Output Current
GROUND CURRENT (µA)
V
IN
= 4V
30
28
26
24
22
20
Ground Pin Current
vs. Output Current
V
IN
= 24V
V
IN
= 36V
18
16 V
IN
= 12V
14
12
10
0
V
IN
= 4V
0 10 20 30 40 50 60 70 80 90100
OUTPUT CURRENT (mA)
100 200 300 400 500
OUTPUT CURRENT (µA)
80
GROUND CURRENT (µA)
Ground Pin Current
vs. Temperature
GROUND CURRENT (µA)
75
70
65
60
55
50
45
40
-40 -20 0
360
340
320
300
280
260
240
220
200
GROUND CURRENT (mA)
I
LOAD
= 10mA
400
380
Ground Pin Current
vs. Temperature
I
LOAD
= 50mA
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
Ground Pin Current
vs. Temperature
I
LOAD
= 100mA
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 CURRENT (µA)
GROUND CURRENT (µA)
GROUND CURRENT (µA)
100
90
80
Ground Pin Current
vs. Input Voltage
1200
1100
1000
900
800
700
600
500
400
300
200
1.5
I
OUT
= 50mA
40
I
OUT
=100mA
35
30
25
20
15
10
4
Ground Pin Current
vs. Input Voltage
I
OUT
= 10µA
70
60
50 I
OUT
= 1mA
40
30
20
10
0
1.5
I
OUT
= 1mA
I
OUT
= 100µA
I
OUT
= 100µA
I
OUT
= 10µA
2
2.5
3
3.5
INPUT VOLTAGE (V)
4
I
OUT
= 10µA
8 12 16 20 24 28 32 36 40
INPUT VOLTAGE (V)
2
2.5
3
3.5
INPUT VOLTAGE (V)
4
MIC5233
4
August 2003
MIC5233
Micrel
120
INPUT CURRENT (mA)
Input Current
vs. Supply Voltage
3.05
3.04
3.03
3.02
3.01
3.00
Output Voltage
vs. Temperature
I
LOAD
= 100µA
100
80
60
40
20
0
-20
-10
0
SUPPLY VOLTAGE (V)
10
V
EN
= 5V
R
LOAD
= 30Ω
OUTPUT VOLTAGE (V)
SHORT CIRCUIT CURRENT (mA)
300
250
200
150
100
50
Short Circuit Current
vs. Temperature
2.99
2.98
2.97
2.96
2.95
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
V
IN
= 4V
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Load Transient Response
OUTPUT CURRENT OUTPUT VOLTAGE
(100mA/div.)
(200mV/div.)
100mA
0mA
V
IN
= 4V
V
OUT
= 3V
C
OUT
= 4.7µF ceramic
TIME (400µs/div.)
August 2003
5
MIC5233
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