MIC5231-2.75BM5 MICREL [Micrel Semiconductor], MIC5231-2.75BM5 Datasheet

no-image

MIC5231-2.75BM5

Manufacturer Part Number
MIC5231-2.75BM5
Description
Micropower ?Cap LDO Regulator Preliminary Information
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC5231-2.75BM5
Manufacturer:
MICREL
Quantity:
642
June 2000
MIC5231
General Description
The MIC5231 µCap low-dropout voltage regulator is intended
for low-output-current biasing applications. It features ex-
tremely low ground current, not greater than 4µA under all
load and temperature conditions, making it efficient and ideal
for keep-alive applications in devices such as notebook
computers.
The MIC5231 offers better than 2% initial accuracy and low
dropout (typically 150mV at 10mA output current). An output
capacitor is not required for stable operation, decreasing cost
and board space. Tiny ceramic chip capacitors may be used
to improve transient response.
The MIC5231 also features a control pin which allows the
regulator to be shut down when not required. Its shutdown-
state draws zero current, benefitting battery-powered appli-
cations.
The MIC5231 is available in fixed output voltages of 2.75V,
3.0V, 3.3V and 5V in the small SOT-23-5 IttyBitty™ package.
Contact Micrel for other voltage options.
Typical Application
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
Ordering Information
Part Number
MIC5231-2.75BM5
MIC5231-3.0BM5
MIC5231-3.3BM5
MIC5231-5.0BM5
V
6V
IN
5V Linear Regulator Application
MIC5231-5.0BM5
IN
EN
GND
1
Marking
OUT
LM2H
LM30
LM33
LM50
Features
• Extremely low quiescent current— only 0.65
• No output capacitor requirement
• Stable with ceramic or tantalum capacitors
• IttyBitty™ SOT-23-5 surface-mount package
• 10mA output drive
• Low 150mV at 10mA dropout voltage
• Tight load and line regulation
• Low temperature coefficient
• Logic-level enable input
Applications
• Real time clocks
• SRAM backup
• Cellular telephones
• Laptop, notebook and palmtop computers
• Battery-powered equipment
• Bar code scanners
• SMPS post-regulator and dc-to-dc modules
Micropower
Voltage
2.75V
3.0V
3.3V
5.0V
V
5V
OUT
Preliminary Information
Temperature Range
MIC5231
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
µ
Cap LDO Regulator
µ
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Package
A
MIC5231
Micrel

Related parts for MIC5231-2.75BM5

MIC5231-2.75BM5 Summary of contents

Page 1

... Cellular telephones • Laptop, notebook and palmtop computers • Battery-powered equipment • Bar code scanners • SMPS post-regulator and dc-to-dc modules Ordering Information Part Number Marking Voltage MIC5231-2.75BM5 LM2H 2.75V MIC5231-3.0BM5 LM30 MIC5231-3.3BM5 LM33 MIC5231-5.0BM5 LM50 MIC5231-5.0BM5 ...

Page 2

... GND Part Identification LM50 4 5 OUT NC MIC5231-5.0BM5 Pin Function Enable (Input): Active high. Logic high = enable; logic low = shutdown. Do not float. Ground Supply Input Regulated Output not internally connected Operating Ratings (Note 1) Input Voltage (V Ambient Temperature (T Junction Temperature (T ...

Page 3

... D(max) is approximately 235°C/ ≤ +125°C; unless noted. J Min Typ Max –2 +2 –3 +3 250 0.2 0.25 0 150 300 0. 0.4 0.18 1 ÷ θ . The θ – the MIC5231 is J(max Micrel Units % % ppm/° µA µ MIC5231 ...

Page 4

... MIC5231 Ground Current vs. Output Current 1 0 OUTPUT CURRENT (mA) 3.10 3.05 3.00 2.95 2.90 -50 -20 MIC5231 Ground Current vs. Supply Voltage 0.8 0.7 0.6 0.5 0.4 0.3 0 Supply Voltage (V) Ground Current vs. Temperature 100 130 TEMPERATURE (°C) 4 Ground Current vs. Temperature 1 0.8 0.6 0 TEMPERATURE (°C) Short Circuit Current vs. Temperature 150 100 ...

Page 5

... At this point important to ensure that the die temperature does not exceed 125°C. Power dissipation in the regulator is calculated as follows The MIC5231 consumes only 0.65uA over load and does not need to consider that contribution in the power dissipation equation, therefore the equation is simplified The MIC5231, in the IttyBitty SOT23-5 package, has a thermal resistance, junction-to-ambient, of 235° ...

Page 6

... D(max 170mW D(max) Therefore, the device can only dissipate 170mW maximum. If the MIC5231 is powered off of a 12V source and the output voltage is 3.3V, the maximum output current can be calcu- lated (Vin - Vout)·Iout D 170mW = (12V - 3.3V)·Iout Iout = 170mW/8 ...

Page 7

... MIC5231 Package Information 1.90 (0.075) REF 0.95 (0.037) REF 3.02 (0.119) 2.80 (0.110) June 2000 1.75 (0.069) 3.00 (0.118) 1.50 (0.059) 2.60 (0.102) 1.30 (0.051) 0.90 (0.035) 10° 0° 0.15 (0.006) 0.50 (0.020) 0.00 (0.000) 0.35 (0.014) SOT-23-5 (M5) 7 DIMENSIONS: MM (INCH) 0.20 (0.008) 0.09 (0.004) 0.60 (0.024) 0.10 (0.004) Micrel MIC5231 ...

Page 8

... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC5231 + 1 (408) 944-0800 ...

Related keywords