Micrel MIC5233 User Manual
MIC5233 Micrel
MIC5233
High Input Voltage, Low IQ µCap 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 shutdown, 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.
Ordering Information
Features
• 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
Applications
• 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
Part Number Marking Voltage Junction Temp. Range Package
MIC5233-1.8BM5 L318 1.8V –40°C to +125°C SOT-23-5
MIC5233-2.5BM5 L325 2.5V –40°C to +125°C SOT-23-5
MIC5233-3.0BM5 L330 3.0V –40°C to +125°C SOT-23-5
MIC5233-3.3BM5 L333 3.3V –40°C to +125°C SOT-23-5
MIC5233-5.0BM5 L350 5.0V –40°C to +125°C SOT-23-5
MIC5233BM5 L3AA ADJ. –40°C to +125°C SOT-23-5
Typical Application
IN
ON
MIC5233BM5
15
2
34
EN
V
OUT
C
R
1
R
2
=2.2µF
OUT
ceramic
I
=18µA
GND
V
C
=1.0µF
IN
OFF
Ultra-Low Current Adjustable Regulator Application
40
35
30
I
= 1mA
OUT
25
20
15
I
GROUND CURRENT (µA)
OUT
10
4 8 12 16 20 24 28 32 36 40
INPUT VOLTAGE (V)
= 10µA
I
OUT
= 100µA
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
GND
2
IN
13
EN
L3xx
45
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.
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
Operating Ratings (Note 2)
Input Supply Voltage ........................................ 2.3V to 36V
Enable Input Voltage........................................... 0V to 36V
Junction Temperature (T
Package Thermal Resistance
SOT-23-5 (θJA)..................................................235°C/W
) ....................... –40°C to +125°C
J
ESD Rating, Note 3
Electrical Characteristics (Note 4)
TA = 25°C with VIN = V
Parameter Condition Min Typ Max Units
Output Voltage Accuracy Variation from nominal V
Line Regulation VIN = V
Load Regulation I
Dropout Voltage I
Ground Current I
Ground Current in Shutdown VEN ≤ 0.6V; VIN = 36V 0.1 1 µA
Short Circuit Current V
Output Leakage, Load = 500Ω; V
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
OUT
+ 1V; I
= 100µA; VEN ≥ 2V; Bold values indicate –40°C<TJ< +125°C; unless otherwise specified.
OUT
OUT
+ 1V to 36V 0.04 0.5 %
OUT
= 100µA to 100mA 0.25 1 %
OUT
= 100µA50mV
OUT
= 50mA 230 300 mV
I
OUT
–1.0 +1.0 %
–2.0 +2.0 %
400 mV
I
= 100mA 270 400 mV
OUT
450 mV
= 100µA1830µA
OUT
35 µA
I
= 50mA 0.35 0.70 mA
OUT
I
= 100mA 1 2 mA
OUT
= 0V 190 350 mA
OUT
= –15V –0.1 µA
IN
= 0.6V; Regulator OFF –1.0 0.01 1.0 µA
EN
= 2.0V; Regulator ON 0.1 1.0 µA
V
EN
VEN = 36V; 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.
Note 4. Specification for packaged product only.
August 2003 3 MIC5233
Loading...