MIC29310 Micrel Semiconductor, MIC29310 Datasheet

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MIC29310

Manufacturer Part Number
MIC29310
Description
3A Fast-Response LDO Regulator
Manufacturer
Micrel Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC29310-3.3BU
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Part Number:
MIC29310-5.0WT
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Part Number:
MIC29310-5.0WU
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
General Description
The MIC29310 and MIC29312 are low cost versions of
MIC29300 family low-dropout (LDO) regulators. Manufac-
tured on Micrel’s proprietary Super beta PNP™ process, the
MIC29310/2 is a 3A LDO regulator with very low-dropout
voltage (600mV over the full load) and low ground current.
Along with a total accuracy of 2% (over temperature, line
and load regulation) these regulators feature very fast tran-
sient recovery from input voltage surges and output load
current changes.
The MIC29310 is available in fixed 3.3V and 5V outputs
voltages; the MIC29312 has an adjustable output which can
be set by two external resistors to a voltage between 1.24V
to 15V. In addition, all versions are fully protected against
overcurrent faults, reversed input polarity, reversed lead
insertion, and overtemperature operation.
A TTL logic enable (EN) pin is available in the MIC29312 to
shutdown the regulator. When not used, the device can be
set to continuous operation by connecting EN to the input
(IN).
The MIC29310/2 is available in the standard 3- and 5-pin
TO-220 and TO-263 packages with an operating junction
temperature range of 0 C to +125 C.
For applications requiring even lower dropout
voltage, input voltage greater than 16V, or an
error flag, see the MIC29300/29301/29302/
29303.
Typical Application
July 1999
MIC29310/29312
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Fixed Regulator Configuration
V
IN
IN
GND
OUT
V
OUT
Ordering Information
Part Number
MIC29310-3.3BT
MIC29310-3.3BU
MIC29310-5.0BT
MIC29310-5.0BU
MIC29312BT
MIC29312BU
1
Features
• Low cost versions of MIC29300 family
• Fast transient response
• 3A current over full temperature range
• 600mV dropout voltage at full load
• Low ground current
• Accurate 1% guaranteed tolerance
• “Zero” current shutdown mode (MIC29312)
• Fixed voltage and adjustable versions
Applications
• Processor peripheral and I/O supplies
• PC add-in cards
• High-efficiency “green” computer systems
• High-efficiency linear power supplies
• High-efficiency switching supply post regulator
• Battery-powered equipment
V
On
Off
IN
Voltage
3A Fast-Response LDO Regulator
* For best performance, total series resistance
3.3V
3.3V
5.0V
5.0V
Adj.
Adj.
(R1 + R2) should be small enough to pass
the minimum regulator load current of 10mA.
Adjustable Regulator Configuration
MIC29310/29312
Junction Temp. Range
EN
IN
V
OUT
MIC29312
0 C to +125 C
0 C to +125 C
0 C to +125 C
0 C to +125 C
0 C to +125 C
0 C to +125 C
GND
= 1. 240
OUT
ADJ
R2
R1
+ 1
R1*
R2*
MIC29310/29312
TO-220-3
TO-263-3
TO-220-3
TO-263-3
TO-220-5
TO-263-5
Package
V
OUT
Micrel

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MIC29310 Summary of contents

Page 1

... When not used, the device can be set to continuous operation by connecting EN to the input (IN). The MIC29310/2 is available in the standard 3- and 5-pin TO-220 and TO-263 packages with an operating junction temperature range +125 C. For applications requiring even lower dropout ...

Page 2

... Ouput Voltage Adjust: 1.24V feedback from external resistive divider. Operating Ratings (Note 1) Input Voltage (V Junction Temperature (T Package Thermal Resistance TO-263 TO-220 ( TO-220 ( 2 3 OUT 2 GND 1 IN MIC29310-x.xBU TO-263 (U) 5 ADJ 4 OUT 3 GND MIC29312-x.xBU TO-263-5 (U) are internally connected. TAB (Note 2) ) ...

Page 3

... The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Note 4: Full Load current is defined as 3A for the MIC29310/29312. For testing, V Note 5: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with ...

Page 4

... MIC29310/29312 Block Diagram IN Bias *EN On/Off Reference Thermal Shut- down MIC29310/29312 MIC29310/29312 O.V. I LIMIT 16V Feed- * MIC29312 only. 4 Micrel OUT ADJ* back GND July 1999 ...

Page 5

... TEMPERATURE ( C) 5 MIC29312 Load Transient Response (See Test Circuit Schematic) 1ms/division 3A 0mA MIC29312 Line Transient Response with 3A Load, 100 F Output Capacitance 200 s/division I OUT C OUT MIC29310-3.3 Dropout Characteristics 5.0 4 10mA LOAD 3.0 2.0 I LOAD 1.0 0 INPUT VOLTAGE (V) MIC29310/29312 Micrel = 3A = 100 ...

Page 6

... INPUT VOLTAGE (V) MIC2931x Ground Current vs. Temperature 1.5A 10 OUT 5 0 -60 - 120 150 TEMPERATURE ( C) MIC29310-3.3 Output Voltage vs. Temperature 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3 DEVICES 3.24 3.22 3.20 -60 - 120 150 TEMPERATURE ( C) MIC29312 Adjust Pin Current vs. Temperature 10mA ...

Page 7

... GND is recommended. This capacitor should have good characteristics to above 250kHz. Transient Response and 5V to 3.3V Conversion The MIC29310/2 have excellent response to variations in input voltage and load current. By virtue of their low dropout voltage, these devices do not saturate into dropout as readily as similar NPN-based designs. A 3.3V output Micrel LDO will ...

Page 8

... Note: This regulator has a minimum load requirement. “Standard” values assume the load meets this requirement. “Minimum Load” values are calculated to draw 10mA and allow regulation with an open load (the minimum current drawn from the load may be zero). MIC29310/29312 current of the sense comparator. The resistor values are calculated by: ...

Page 9

... TO-220-3 (T) 0.150 D 0.005 (3.81 D 0.13) 0.400 0.015 (10.16 0.38) 0.241 0.017 (6.12 0.43) 0.578 0.018 (14.68 0.46) 7 Typ. 0.550 0.010 (13.97 0.25) 0.032 0.005 0.018 0.008 (0.81 0.13) (0.46 0.20) Dimensions: TO-220-5 (T) 9 0.050 0.005 (1.27 0.13 0.100 0.020 (2.54 0.51) DIMENSIONS: INCH (MM) 0.177 0.008 (4.50 0.20) 0.050 0.005 (1.27 0.13) SEATING PLANE 0.103 0.013 (2.62 0.33) inch (mm) MIC29310/29312 Micrel ...

Page 10

... MIC29310/29312 0.065 0.010 20 2 0.100 BSC DIM. = INCH 0.065 0.010 20 2 0.067 0.005 DIM. = INCH MIC29310/29312 0.405 0.005 0.050 0.005 0.360 0.005 0.600 0.025 8 MAX 0.050 0.015 0.002 TO-263-3 (U) 0.405 0.005 0.050 0.005 0.360 0.005 0.600 0.025 8 MAX 0.032 0.003 0.015 0.002 ...

Page 11

... MIC29310/29312 July 1999 11 Micrel MIC29310/29312 ...

Page 12

... 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. MIC29310/29312 + 1 (408) 944-0970 http://www ...

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