MIC39300-2.5BU Micrel Inc, MIC39300-2.5BU Datasheet

IC REG LDO 3A 2.5V TO263

MIC39300-2.5BU

Manufacturer Part Number
MIC39300-2.5BU
Description
IC REG LDO 3A 2.5V TO263
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC39300-2.5BU

Regulator Topology
Positive Fixed
Voltage - Output
2.5V
Voltage - Input
Up to 16V
Voltage - Dropout (typical)
0.385V @ 3A
Number Of Regulators
1
Current - Output
3A (Min)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-3, D²Pak (3 leads + Tab), TO-263AA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-

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General Description
The MIC39300, MIC39301 and MIC39302 are 3.0A low-
dropout linear voltage regulators that provide a low
voltage, high-current output with a minimum of external
components. Utilizing Micrel’s proprietary Super βeta
PNP
low dropout (typically 385mV at 3.0A) and low ground
current (typically 36mA at 3.0A).
The MIC39300/1/2 is ideal for PC add-in cards that need
to convert from standard 3.3V to 2.5V or 2.5V to 1.8V. A
guaranteed maximum dropout voltage of 500mV over all
operating conditions allows the MIC39300/1/2 to provide
2.5V from a supply as low as 3V, and 1.8V from a supply
as low as 2.5V. The MIC39300/1/2 also has fast transient
response for heavy switching applications. The device
requires only 47µF of output capacitance to maintain
stability and achieve fast transient response.
The MIC39300/1/2 is fully protected with overcurrent
limiting, thermal shutdown, reversed-battery protection,
reversed-leakage protection, and reversed-lead insertion.
The MIC39301 offers a TTL-logic compatible enable pin
and an error flag that indicates under voltage and over
current
MIC39300/1 comes in the TO-220 and TO-263 (D
packages and is an ideal upgrade to older, NPN-based
linear voltage regulators. The MIC39302 adjustable option
allows programming the output voltage anywhere between
1.24V and 15.5V and is offered in a 5-Pin, TO-263 (D
package.
Typical Application
_________________________________________________________________________________________________________________________
Super βeta PNP is a registered trademark of Micrel, Inc.
StrongARM is a trademark of Advanced RISC Machines, Ltd
October 2009
®
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
pass element, the MIC39300/1/2 offers extremely
MIC39300
conditions.
Offered
in
fixed
voltages,
MIC39301
2
2
Pak)
Pak)
the
Features
• 3.0A minimum guaranteed output current
• 550mV maximum dropout voltage over temperature
• Ideal for 3.0V to 2.5V conversion
• Ideal for 2.5V to 1.8V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery protection
• Reversed-leakage protection
• Fast transient response
• TO-263 (D
• TTL/CMOS compatible enable pin (MIC39301/2 only)
• Error flag output (MIC39301 only)
• Adjustable output (MIC39302 only)
Applications
• LDO linear regulator for PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Multimedia and PC processor supplies
• Low-voltage microcontrollers
• StrongARM™ processor supply
3A, Low-Voltage Low-Dropout Regulator
MIC39300/39301/39302
2
Pak) and TO-220 packaging
MIC39302 Adjustable Output Application
(*See Minimum Load Current Section)
**See Thermal Load Current Section
M9999-102309-A

Related parts for MIC39300-2.5BU

MIC39300-2.5BU Summary of contents

Page 1

... MIC39300/1/2 offers extremely low dropout (typically 385mV at 3.0A) and low ground current (typically 36mA at 3.0A). The MIC39300/1/2 is ideal for PC add-in cards that need to convert from standard 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the MIC39300/1/2 to provide 2 ...

Page 2

... Micrel, Inc. Ordering Information Part Number Standard RoHS Compliant* MIC39300-1.8BT MIC39300-1.8WT MIC39300-1.8BU MIC39300-1.8WU MIC39300-2.5BT MIC39300-2.5WT MIC39300-2.5BU MIC39300-2.5WU MIC39301-1.8BT MIC39301-1.8WT MIC39301-1.8BU MIC39301-1.8WU MIC39301-2.5BT MIC39301-2.5WT MIC39301-2.5BU MIC39301-2.5WU — MIC39302WU Note: * RoHS compliant with ‘high-melting solder’ exemption. October 2009 Junction Temp Voltage Range 1.8V – ...

Page 3

... OUT Regulator Output Error Flag (Ouput): Open-collector indicates an output fault condition. FLG Active low. Adjustable Regulator Feedback Input: Connect to the resistor voltage ADJ divider that is placed from OUT to GND in order to set the output voltage. 3 MIC39300/39301/39302 MIC39300-x.xBU TO-263-3 (U) MIC39301-x.xBU 2 TO-263-5 (D Pak) (U) M9999-102309-A ...

Page 4

... VIN = VOUT + 1V OUT logic low (off) logic high (on 2. 0.8V EN Note 16V 2.50V 250µA, Note OUT % of V OUT 4 MIC39300/39301/39302 (2) )...................................... +2.5V to +16V IN )....................................................+16V EN ) ....................... Note 4 D(max) ) ........................ –40°C to +125° ........................................................2°C ........................................................2°C/W JC Min Typ –1 ≤ 8V –2 IN ≤ 8V 0.06 IN ≤ 3A 0.2 ...

Page 5

... See “Applications Information.” JA ÷ (T – where T OUT(worst case) J(max) J(min OUT = 8V for t = 10ms MIC39300/39301/39302 Min Typ 1.228 1.240 1.215 20 40 0.1 is +125°C and T is –40°C. J(max) J(min 1V. For output voltages below 2.5V, dropout voltage ...

Page 6

... Micrel, Inc. Typical Characteristics October 2009 6 MIC39300/39301/39302 M9999-102309-A ...

Page 7

... Micrel, Inc. Typical Characteristics (cont) October 2009 7 MIC39300/39301/39302 M9999-102309-A ...

Page 8

... Micrel, Inc. Functional Characteristics October 2009 8 MIC39300/39301/39302 M9999-102309-A ...

Page 9

... Micrel, Inc. Functional Diagram October 2009 9 MIC39300/39301/39302 M9999-102309-A ...

Page 10

... A trade-off for the low dropout voltage is a varying base drive requirement. Micrel’s Super βeta PNP reduces this drive requirement to only the load current. The MIC39300/1/2 regulators are fully protected from damage due to fault conditions. Current limiting is provided. This limiting is linear; output current during overload conditions is constant. Thermal shutdown disables the device when the die temperature exceeds the maximum safe operating temperature ...

Page 11

... NPN-based regulators are already operating in dropout, with typical dropout requirements of 1.2V or greater. To convert down to 2.5V without operating in dropout, NPN-based regulators require an input voltage of 3.7V at the very least. The MIC39300/1 regulator will provide excellent performance with an input as low as 3.0V or 2.5V. This gives the PNP-based regulators a distinct ...

Page 12

... Micrel, Inc. Package Information October 2009 3-Pin TO-220 (T) 5-Pin TO-220 (T) 12 MIC39300/39301/39302 M9999-102309-A ...

Page 13

... 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 October 2009 3-Pin TO-263 (U) 5-Pin TO-263 (U) indemnify Micrel for any damages resulting from such use or sale. © 2009 Micrel, Incorporated. 13 MIC39300/39301/39302 M9999-102309-A ...

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