MIC5235
Micrel
MIC5235
Ultra-Low Quiescent Current, 150mA
µ
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
µCap
LDO design, the MIC5235 is stable with either
ceramic or tantalum output capacitor. It only requires a 2.2µF
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°C to +125°C.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Wide input voltage range: 2.3V to 24V
Ultra low ground current: 18µA
Low dropout voltage: 310mV at 150mA
High output accuracy:
±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
USB power supply
Cellular phones
Keep-alive supply in notebook and portable computers
Logic supply for high-voltage batteries
Automotive electronics
Battery powered systems
Applications
Ordering Information
Part Number
MIC5235-1.5BM5
MIC5235-1.8BM5
MIC5235-2.5BM5
MIC5235-2.7BM5
MIC5235-3.0BM5
MIC5235-3.3BM5
MIC5235-5.0BM5
MIC5235BM5
Marking
L215
L218
L225
L227
L230
L233
L250
L2AA
Voltage
1.5V
1.8V
2.5V
2.7V
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
–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
SOT-23-5
SOT-23-5
Typical Application
40
GROUND CURRENT (µA)
35
30
25
20
15
10
4
I
OUT
= 10µA
9
14
19
INPUT VOLTAGE (V)
24
I
OUT
= 1mA
V
IN
C
IN
=1.0µF
OFF ON
MIC5235BM5
1
2
3
4
5
V
OUT
=1.8V
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
MIC5235
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°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 24V
Enable Input Voltage ........................................... 0V to 24V
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 ,
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 24V
Load = 100µA to 150mA
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Ground Current
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
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
= 24V; 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
= 24V
V
OUT
= 0V
Load = 500Ω; V
IN
= –15V
Min.
–1.0
–2.0
0.04
0.25
50
230
270
310
18
0.35
1
2
0.1
350
–0.1
1
300
400
400
450
450
500
30
35
0.7
2
4
1
500
Typ.
Max.
+1.0
+2.0
Units
%
%
%
%
mV
mV
mV
mV
mV
mV
mV
µA
µA
mA
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
MIC5235
京公网安备 11010802033920号
EEWORLD
