MIC5238-1.2YD5 TR Micrel Inc, MIC5238-1.2YD5 TR Datasheet

150mA Low Vo, Low Iq LDO ( )

MIC5238-1.2YD5 TR

Manufacturer Part Number
MIC5238-1.2YD5 TR
Description
150mA Low Vo, Low Iq LDO ( )
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC5238-1.2YD5 TR

Regulator Topology
Positive Fixed
Voltage - Output
1.2V
Voltage - Input
Up to 6V
Voltage - Dropout (typical)
0.31V @ 150mA
Number Of Regulators
1
Current - Output
150mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-5, TSOT-5, TSOP-5
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-1834-2
MIC5238-1.2YD5TR
MIC5238-1.2YD5TR
General Description
The MIC5238 is an ultra-low voltage output, 150mA LDO
regulator. Designed to operate in a single supply or dual
supply mode, the MIC5238 consumes only 23µA of bias
current, improving efficiency. When operating in the dual
supply mode, the efficiency greatly improves as the higher
voltage supply is only required to supply the 23µA bias
current while the output and base drive comes off of the
much lower input supply voltage.
As a µCap regulator, the MIC5238 operates with a 2.2µF
ceramic capacitor on the output, offering a smaller overall
solution. It also incorporates a logic-level enable pin that
allows the MIC5238 to be put into a zero off-current mode
when disabled.
The MIC5238 is fully protected with current limit and
thermal shutdown. It is offered in the IttyBitty
package with an operating junction temperature range of
–40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
IttyBitty is a registered trademark of Micrel, Inc.
November 2009
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
Ultra-Low Voltage Application
®
SOT-23-5
Features
• Ultra-low input voltage range:1.5V to 6V
• Ultra-low output voltage:1.0V minimum output voltage
• 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 leakage protection
• Thermal shutdown and current limit protection
• IttyBitty
Applications
• PDAs and pocket PCs
• Cellular phones
• Battery powered systems
• Low power microprocessor power supplies
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Ultra-Low Quiescent Current, 150mA
®
SOT-23-5 package
µCap LDO Regulator
MIC5238
M9999-111209

Related parts for MIC5238-1.2YD5 TR

MIC5238-1.2YD5 TR Summary of contents

Page 1

... As a µCap regulator, the MIC5238 operates with a 2.2µF ceramic capacitor on the output, offering a smaller overall solution. It also incorporates a logic-level enable pin that allows the MIC5238 to be put into a zero off-current mode when disabled. The MIC5238 is fully protected with current limit and thermal shutdown ...

Page 2

... BIAS 5 OUT November 2008 Pb-Free Marking Code* MIC5238-1.0YM5 L410 MIC5238-1.1YM5 L411 MIC5238-1.3YM5 L413 MIC5238-1.0YD5 N410 MIC5238-1.1YD5 N411 MIC5238-1.3YD5 N413 Pin Function Supply Input Ground Enable (Input): Logic Low = shutdown; Logic High = enable. Don not leave open. Bias Supply Input Regulator Output ...

Page 3

... IN )................................ 2. BIAS ).................................. ........................ –40°C to +125°C J SOT-23-5 (θ ) .................................................235°C/W JA Min Typ –1.5 –2 0.25 0.04 0.7 50 230 270 310 1.5 0.5 350 5 OUT MIC5238 < +125°C, unless J Max Units +1 0 300 mV mV 400 mV 450 mV mV 500 µA µ 2.5 5 µ ...

Page 4

... November 2008 (4) cont. = 3.3V 100µ 2V, bold values indicate –40°C < T BIAS OUT EN Condition Regulator OFF Regulator 0.2V, Regulator OFF 0.2V, Regulator MIC5238 < +125°C, unless J Min Typ Max Units V 0.2 V 2.0 –1.0 0.01 1.0 µA 0.1 1.0 µA M9999-111209 ...

Page 5

... Micrel, Inc. Typical Characteristics November 2008 5 MIC5238 M9999-111209 ...

Page 6

... Micrel, Inc. Typical Characteristics cont. November 2008 6 MIC5238 M9999-111209 ...

Page 7

... Micrel, Inc. Functional Characteristics November 2008 7 MIC5238 M9999-111209 ...

Page 8

... Micrel, Inc. Functional Diagram November 2008 Block Diagram – Fixed Output Voltage 8 MIC5238 M9999-111209 ...

Page 9

... X7R ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. No-Load Stability The MIC5238 will remain stable and in regulation with no load unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations The MIC5238 is designed to provide 150mA of continuous current in a very small package ...

Page 10

... V Input power = 1.5 × 150mA + 1.5 × 0.002 + 2.5 × 0.0002 = 225mW Output power = 1V × 150mA = 150mW Efficiency = 150/225 × 100 = 66.6 % Therefore, by using the dual supply MIC5238 LDO the efficiency is nearly doubled over the single supply version. × (V ground IN ...

Page 11

... Micrel, Inc. Package Information November 2008 5-Pin SOT-23 (M5) 11 MIC5238 M9999-111209 ...

Page 12

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully November 2008 5-Pin Thin SOT-23 (D5) indemnify Micrel for any damages resulting from such use or sale. © 2003 Micrel, Incorporated. 12 MIC5238 nt M9999-111209 ...

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