mic39101 Micrel Semiconductor, mic39101 Datasheet

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mic39101

Manufacturer Part Number
mic39101
Description
Mic39100, Mic39101, And Mic39102 1a Low-voltage Low-dropout Regulator
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The MIC39100, MIC39101, and MIC39102 are 1A low-dropout
linear voltage regulators that provide low-voltage, high-current
output from an extremely small package. Utilizing Micrel’s pro-
prietary Super βeta PNP™ pass element, the MIC39100/1/2
offers extremely low dropout (typically 410mV at 1A) and low
ground current (typically 11mA at 1A).
The MIC39100 is a fixed output regulator offered in the
SOT-223 package. The MIC39101 and MIC39102 are fixed
and adjustable regulators, respectively, in a thermally en-
hanced power 8-lead SOIC package.
The MIC39100/1/2 is ideal for PC add-in cards that need to
convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to
1.8V. A guaranteed maximum dropout voltage of 630mV over
all operating conditions allows the MIC39100/1/2 to provide
2.5V from a supply as low as 3.13V and 1.8V from a supply
as low as 2.43V.
The MIC39100/1/2 is fully protected with overcurrent limit-
ing, thermal shutdown, and reversed-battery protection.
Fixed voltages of 5.0V, 3.3V, 2.5V, and 1.8V are available
on MIC39100/1 with adjustable output voltages to 1.24V on
MIC39102.
For other voltages, contact Micrel.
Typical Applications
Super βeta PNP is a trademark of Micrel, Inc.
August 2005
MIC39100/39101/39102
3.3V
V
IN
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
2.5V/1A Regulator
IN
MIC39100
GND
OUT
10µF
tantalum
2.5V
SHUTDOWN
ENABLE
2.5V/1A Regulator with Error Flag
3.3V
V
IN
IN
EN
MIC39101
GND
100k
OUT
FLG
1
Features
• Fixed and adjustable output voltages to 1.24V
• 410mV typical dropout at 1A
• 1A minimum guaranteed output current
• 1% initial accuracy
• Low ground current
• Current limiting and thermal shutdown
• Reversed-battery protection
• Reversed-leakage protection
• Fast transient response
• Low-profile SOT-223 package
• Power SO-8 package
Applications
• LDO linear regulator for PC add-in cards
• PowerPC™ power supplies
• High-efficiency linear power supplies
• SMPS post regulator
• Multimedia and PC processor supplies
• Battery chargers
• Low-voltage microcontrollers and digital logic
R1
1A Low-Voltage Low-Dropout Regulator
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V conversion
10µF
tantalum
MIC39100/39101/39102
Error
Flag
Output
2.5V
SHUTDOWN
ENABLE
1.5V/1A Adjustable Regulator
2.5V
V
IN
IN
EN
MIC39102
GND
OUT
ADJ
M9999-082505-B
R1
R2
10µF
tantalum
Micrel
1.5V

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mic39101 Summary of contents

Page 1

... MIC39100/39101/39102 General Description The MIC39100, MIC39101, and MIC39102 are 1A low-dropout linear voltage regulators that provide low-voltage, high-current output from an extremely small package. Utilizing Micrel’s pro- prietary Super βeta PNP™ pass element, the MIC39100/1/2 offers extremely low dropout (typically 410mV at 1A) and low ground current (typically 11mA at 1A). The MIC39100 is a fi ...

Page 2

... MIC39102BM MIC39102YM * RoHS compliant with ‘high-melting solder’ exemption. Pin Configuration OUT 3 FLG 4 MIC39101-x.x Fixed SOIC-8 (M) Pin Description Pin No. Pin No. Pin No. MIC39100 MIC39101 MIC39102 5–8 5–8 TAB M9999-082505 Voltage Junction Temp. Range 1.8V -40° ...

Page 3

MIC39100/39101/39102 Absolute Maximum Ratings Supply Voltage (V ) .......................................–20V to +20V IN Enable Voltage (V ) .................................................. +20V EN Storage Temperature (T ) ........................ –65°C to +150°C S Lead Temperature (soldering, 5 sec.) ........................ 260°C ESD, Note 3 Electrical Characteristics ...

Page 4

MIC39100/39101/39102 Symbol Parameter MIC39102 Only Reference Voltage Adjust Pin Bias Current Reference Voltage ppm/°C Temp. Coefficient Adjust Pin Bias Current Temp. Coefficient Note 1. Exceeding the absolute maximum ratings may damage the device. Note 2. The device is not guaranteed ...

Page 5

MIC39100/39101/39102 Typical Characteristics P ower S upply R ejec tion R atio 3.3V OUT OUT C = 10µF OUT 1E+1 1E+2 1E+3 ...

Page 6

MIC39100/39101/39102 G round C urrent upply V oltage (3. LOAD = SUPPLY VOLTAGE (V) G round C urrent emperature 20 I ...

Page 7

MIC39100/39101/39102 Functional Characteristics August 2005 7 Micrel M9999-082505-B ...

Page 8

... MIC39100/39101/39102 Functional Diagrams IN Ref. MIC39100 MIC39101 MIC39101 Fixed Regulator with Flag and Enable Block Diagram MIC39102 M9999-082505 OV I 1.240V 18V Thermal Shut- down GND MIC39100 Fixed Regulator Block Diagram 1.180V 1.240V Ref. Thermal Shut- down 1.240V Ref. Thermal ...

Page 9

... Error Flag The MIC39101 features an error flag (FLG), which monitors saturation voltage. the output voltage and signals an error condition when this voltage drops 5% below its expected value. The error fl open-collector output that pulls low under fault conditions and may sink up to 10mA. Low output voltage signifi ...

Page 10

... Power SOIC-8 Thermal Characteristics One of the secrets of the MIC39101/2’s performance is its power SO-8 package featuring half the thermal resistance of a standard SO-8 package. Lower thermal resistance means more output current or higher input voltage for a given pack- age size ...

Page 11

MIC39100/39101/39102 Δ – T J(max) A(max 125°C J(max maximum ambient operating temperature A(max) For example, the maximum ambient temperature is 50°C, the ΔT is determined as follows: ΔT = 125°C – 50°C ΔT = ...

Page 12

MIC39100/39101/39102 Package Information 2.41 (0.095) 2.21 (0.087) 0.10 (0.004) 0.02 (0.0008) 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 ...

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