MIC5270BM5 Micrel Inc, MIC5270BM5 Datasheet

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MIC5270BM5

Manufacturer Part Number
MIC5270BM5
Description
Manufacturer
Micrel Inc
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC5270BM5
Manufacturer:
MICREL
Quantity:
30 000
Part Number:
MIC5270BM5TR
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
General Description
The MIC5270 is a µCap 100mA negative regulator in a
SOT-23-5 package. With better than 2% initial accuracy, this
regulator provides a very accurate supply voltage for applica-
tions that require a negative rail. The MIC5270 sinks 100mA
of output current at very low dropout voltage (600mV maxi-
mum at 100mA of output current).
The µCap regulator design is optimized to work with low-
value, low-cost ceramic capacitors. The output typically re-
quires only a 1µF capacitance for stability.
Designed for applications where small packaging and effi-
ciency are critical, the MIC5270 combines LDO design exper-
tise with IttyBitty
reduce power dissipation. Ground current is optimized to help
improve battery life in portable applications.
The MIC5270 is available in the SOT-23-5 package for space
saving applications and it is available with fixed –3.0V, –4.1V,
–5.0V, and adjustable outputs.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Ordering Information
Typical Application
IttyBitty is a registered trademark of Micrel, Inc.
May 2005
MIC5270
Standard
MIC5270BM5
MIC5270-3.0BM5
MIC5270-4.1BM5
MIC5270-5.0BM5
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
–6.0V
V
IN
Regulator With Fixed Output
®
packaging to improve performance and
MIC5270-5.0BM5
2
5
1µF
Marking Code
GND
–IN
LLAA
LL30
LL41
LL50
–OUT
10µF
Part Number
4
PbFree
MIC5270YM5
MIC5270-3.0YM5
MIC5270-4.1YM5
MIC5270-5.0YM5
–5.0V
V
OUT
Marking Code
1
LLAA
LL30
LL41
LL50
Features
• Stable with ceramic or tantalum capacitor
• Low dropout voltage: 500mV @ 100mA
• Low ground current: 35µA @ load = 100µA
• Tight initial accuracy: ±2%
• Tight load and line regulation
• Thermal shutdown
• Current limiting
• IttyBitty
Applications
• GaAsFET bias
• Portable cameras and video recorders
• PDAs
• Battery-powered equipment
µ
Cap Negative Low-Dropout Regulator
®
Regulator With Adjustable Output
SOT-23-5 packaging
–6.0V
Voltage
V
–3.0V
–4.1V
–5.0V
Adj.
IN
MIC5270
2
5
1µF
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
MIC5270BM5
GND
–IN
Temp. Range
Junction
–OUT
ADJ
10µF
3
4
R1
R2
–5.0V
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
V
Package
OUT
M9999-052705
Micrel, Inc.

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MIC5270BM5 Summary of contents

Page 1

... SOT-23-5 packaging Junction Voltage Temp. Range Package Adj. –40°C to +125°C SOT-23-5 –3.0V –40°C to +125°C SOT-23-5 –4.1V –40°C to +125°C SOT-23-5 –5.0V –40°C to +125°C SOT-23-5 MIC5270BM5 GND ADJ OUT –IN –OUT –5.0V –6.0V 1µF 10µ ...

Page 2

... MIC5270 Pin Configuration ADJ GND LLAA 4 5 –OUT –IN MIC5270BM5 Adjustable Voltage Pin Description Pin Number Pin Number Pin Name (Adj.) (Fixed M9999-052705 Pin Function NC Not internally connected. GND Ground. NC Not internally connected. ADJ Adjustable (Input): Adjustable feedback output connects to resistor voltage divider. – ...

Page 3

MIC5270 Absolute Maximum Ratings Input Voltage (V ) ....................................... –20V to +0.3V IN Power Dissipation (P ) ............................ Internally Limited D Junction Temperature (T ) ....................... –40°C to +125°C J Lead Temperature (soldering, 5 sec.) ....................... 260°C Storage Temperature (T ...

Page 4

MIC5270 Typical Characteristics Dropout Characteristics -3 Load -2.5 -2 -1.5 -1 -0.5 -100mA Load SUPPLY VOLTAGE (V) Ground Current vs. Output Current -2.5 -2 -1 ...

Page 5

MIC5270 Functional Characteristics Load Transient -10mA -100mA TIME (2ms/div.) Negative Enable Transient 0V TIME (20 May 2005 C = 1µF Ceramic OUT OUT 0V s/div Load Transient -10mA C = 1µF ...

Page 6

MIC5270 Functional Diagram M9999-052705 GND V IN MIC5270-x.x 6 Micrel, Inc. V OUT May 2005 ...

Page 7

... Regulators ” handbook. Adjustable Regulator Application MIC5270BM 5 –V –IN –OUT IN 2 GND ADJ Figure 1. Adjustable Voltage Application The MIC5270BM5 can be adjusted from 1.20V to 14V by using two external resistors (Figure 1). The resistors set the output voltage based on the following equation  V OUT REF R ...

Page 8

... MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...

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