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MIC5235BM TR

P1-P3P4-P6P7-P9
January 2002 1 MIC5235
MIC5235 Micrel
MIC5235
Ultra-Low Quiescent Current, 150 mA
µ
Cap LDO Regulator
Final Information
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 3.0V and adjustable output voltage verisons, the
MIC5235 is offered in the IttyBitty™ SOT-23-5 package with
a junction temperature range of –40°C to +125°C.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
IttyBitty is a trademark of Micrel, Inc.
Features
• Wide input voltage range: 2.3V to 24V
• Ultra low ground current: 18µA
• Low dropout voltage of 310mV at 150mA
• 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
Applications
• USB power supply
• Cellular phones
• Keep-alive supply in notebook and portable computers
• Logic supply for high-voltage batteries
• Automotive electronics
• Battery powered systems
Typical Application
15
2
34
C
OUT
=2.2µF
ceramic
I
GND
=18µA
C
IN
=1.0µF
EN
MIC5235BM5
V
IN
V
OUT
=1.8V
R
1
R
2
OFF
ON
Ultra-Low Current Adjustable Regulator Application
Ordering Information
Part Number Marking Voltage Junction Temp. Range* Package
MIC5235-3.0BM5 L230 3.0V –40°C to +125°C SOT-23-5
MIC5235BM5 L2AA ADJ. –40°C to +125°C SOT-23-5
Ground Current vs. Input Voltage
10
15
20
25
30
35
40
4 9 14 19 24
GROUND CURRENT (µA)
INPUT VOLTAGE (V)
I
OUT
= 10µA
I
OUT
= 1mA
I
OUT
= 100µA
MIC5235 Micrel
MIC5235 2 January 2002
Pin Configuration
IN
OUT
NC or
ADJ.
EN
L2xx
13
45
2
GND
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
January 2002 3 MIC5235
MIC5235 Micrel
Electrical Characteristics
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 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 = 100µA to 150mA 0.25 1 %
Dropout Voltage I
OUT
= 100µA50mV
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
= 100µA1830µA
35 µA
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 µA
Short Circuit Current V
OUT
= 0V 350 500 mA
Output Leakage, Load = 500Ω; V
IN
= –15V –0.1 µA
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 µA
V
EN
= 2.0V; Regulator ON 0.1 1.0 µA
V
EN
= 24V; Regulator ON 0.5 2.5 µA
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.
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
P1-P3P4-P6P7-P9

MIC5235BM TR

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IC REG LIN POS ADJ 150MA 8SOIC
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