Micrel MIC69303YME Single supply vin, low vin, low vout, 3aldo Datasheet

MIC69301/2/3
Single Supply VIN, Low VIN, Low VOUT, 3A
LDO
General Description
Features
The MIC69301/2/3 is the 3A output current member of the
• Input voltage range: VIN: 1.65V to 5.5V
MIC69xxx family of high current, low voltage regulators,
• Maximum dropout (VIN – VOUT) of 500mV
which support currents of 1A, 1.5A, 3A, and 5A. This
over temperature
family operates from a single low voltage supply, yet offers
• Adjustable output voltage down to 0.5V
high precision and ultra low dropout of 500mV under worst
• Stable with 10µF ceramic output capacitor
case conditions.
• Excellent line and load regulation
The MIC69301/2/3 operates from an input voltage of 1.65V
• Logic controlled shutdown
to 5.5V. It is designed to drive digital circuits requiring low
voltage at high currents (i.e., PLDs, DSP, microcontroller,
• Thermal shutdown and current-limit protection
etc.). These regulators are available in adjustable and
• Error flag output
fixed output voltages. The adjustable version can support
• 5-Pin TO-263
output voltages down to 0.5V.
• 5-Pin S-Pak package
The µCap design of the MIC69301/2/3 is optimized for
• ePad SOIC-8 package
stability with low value, low-ESR ceramic output
capacitors.
• 12-Pin 4mm x 4mm MLFTM package (MIC69303 only)
Features of the MIC69301/2/3 include thermal shutdown
• –40°C to +125°C junction temperature range
and current limit protection. Logic enable and error flag
pins are also available.
Applications
The MIC69301/2/3 is offered in TO-263, S-PAK and the
• Point-of-load applications
ePad SOIC-8 packages. The MIC69303 is also available in
TM
a 12-Pin 4mm x 4mm MLF package. All packages have
• Industrial power
an operating temperature range of –40°C to +125°C.
• Sensitive RF applications
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
*Error Flag Output MIC69303 only
Fixed 1.2V Regulator w/Error Flag Output
Adjustable Regulator
MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2011
M9999-032111-B
Micrel, Inc.
MIC69301/2/3
Ordering Information
Part Number
Nominal
Output Voltage
Flag Output
Junction
Temperature Range
Package
Lead Finish
MIC69301-1.2YME
1.2V
Yes
–40° to +125°C
8-Pin ePad SOIC
Pb Free
MIC69301-1.2WR
1.2V
Yes
–40° to +125°C
5-Pin S-PAK
RoHS Compliant
MIC69301-1.2WU
1.2V
Yes
–40° to +125°C
5-Pin TO-263
RoHS Compliant
MIC69302WR
Adj.
No
–40° to +125°C
5-Pin S-PAK
RoHS Compliant
MIC69302WU
Adj.
No
–40° to +125°C
5-Pin TO-263
RoHS Compliant
MIC69303YME
Adj.
Yes
–40° to +125°C
8-Pin ePad SOIC
MIC69303YML
Adj.
Yes
–40° to +125°C
Pb Free
TM
12-Pin 4mm x 4mm MLF
Pb Free
Pin Configuration
March 2011
5-Pin TO-263 (U)
(Adjustable Voltage)
5-Pin TO-263 (U)
(Fixed Voltage with Flag)
5-Pin S-PAK (R)
(Adjustable Voltage)
5-Pin S-PAK (R)
(Fixed Voltage with Flag)
8-Pin ePad SOIC (ME)
(Adjustable Voltage)
8-Pin ePad SOIC (ME)
(Fixed Voltage with Flag)
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Micrel, Inc.
MIC69301/2/3
12-Pin 4mm x 4mm MLFTM (ML)
(Adjustable Voltage with Flag)
Pin Description
Pin
Number
(Fixed)
SPAK-5
TO-263-5
Pin
Number
(Adjustable)
SPAK-5
TO-263-5
Pin
Number
(Fixed)
ePad
SOIC-8
Pin
Number
(Adjustable)
ePad
SOIC-8
Pin
Number
(Adjustable)
ePad
4mm x 4mm
MLFTM
Pin
Name
1
1
2
2
3
EN
Enable (Input): CMOS compatible input. Logic
high = enable, logic low = shutdown. Do not
leave pin floating.
2
2
3,4
3,4
4, 5, 6
IN
Input voltage which supplies current to the
output power device.
3, TAB
3, TAB
1
1
1
GND
Ground (TAB is connected to ground on S-Pak
and TO-263).
4
4
5,6
5,6
7, 9
OUT
Regulator Output.
—
—
7
—
—
SNS
Output voltage sense. Connect to output
voltage.
—
5
—
7
11
ADJ
Adjustable regulator feedback input. Connect
to resistor voltage divider.
5
—
8
8
12
FLG
Error Flag (Output): Open collector output.
Active low indicates an output fault condition.
—
—
EP
EP
EP
EP
Exposed pad. Connect to GND.
—
—
—
—
2, 8, 10
NC
No Connect. Not internally connected.
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3
Pin Function
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Micrel, Inc.
MIC69301/2/3
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Input Voltage (VIN to GND) .................. –0.3V to +6V
Logic Input Voltage (VEN to GND). .......–0.3V to (VIN + 0.3V)
Fault Flag(VFLG to GND ..................................... –0.3V to 6V
Storage Temperature (TS).........................–65°C to +125°C
Lead Temperature(TS) .............................................. 260°C
ESD(4) ............................................................................. 2kV
Supply Voltage (VIN)....................................... 1.65V to 5.5V
Enable Input Voltage (VEN)..................................... 0V to VIN
Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C
Power Dissipation (PD)........................... Internally Limited(3)
Package Thermal Resistance
S-PAK-5 (θJC).......................................................2°C/W
S-PAK-5 (θJA).....................................................38°C/W
TO-263-5 (θJC) .....................................................2°C/W
ePad SOIC-8 (θJA) .............................................41°C/W
4x4 MLF-12L(θJA) .............................................60°C/W
Electrical Characteristics(4)
TA = 25°C with VIN = VOUT + 1V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT = 10µF ceramic, unless noted.
Parameter
Test Conditions
Min
Typ
Max
Unit
5.5
V
Power Input Supply
Input Voltage Range (VIN)
Ground Pin Current
Ground Pin Current in Shutdown
1.65
IOUT = 10mA
1.2
5
mA
IOUT = 1.5A
12
30
mA
IOUT = 3.0A
32
75
mA
VEN = 0V; VIN = 2.0V; VOUT = 0V
1
µA
Output Voltage
Output Voltage (Fixed)
-2.0
2.0
%
Load Regulation
IOUT = 10mA to 3A
±0.3
%
Line Regulation(5)
VIN = VOUT + 1.0V to 5.5V
0.2
0.3
%/V
0.5
0.510
V
0.25
1.0
µA
Reference (Adjustable)
Feedback Reference Voltage
(ADJ Pin)
(+/- 2.0%)
Feedback Bias Current
VADJ = 0.5V
0.490
Current Limit
Current Limit
VOUT = 0V
3.3
5.2
A
Power Dropout Voltage
Dropout Voltage (VIN - VOUT)(6)
IOUT = 1.5A
200
300
mV
IOUT = 3.0A
275
500
mV
0.2
V
Enable Input
Enable Input Threshold
Enable Pin Bias Current
Turn-on Time
Regulator Enabled
0.8
0.57
Regulator Shutdown
V
VEN ≤ 0.2V ( Regulator Shutdown)
0.0
µA
VEN ≥ 0.8V ( Regulator Enabled)
7.0
µA
90% of typical VOUT; VEN = VIN
10
150
µs
10
14
%
Fault Output
Fault Threshold Voltage
% of VOUT below nominal output
(VOUT Falling)
Fault Hysteresis
Fault Output Low Voltage
March 2011
IFLG = 250μA (sinking), VEN = 0V
4
7.5
2.0
%
150
mV
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Micrel, Inc.
MIC69301/2/3
Electrical Characteristics(4) (Continued)
TA = 25°C with VIN = VOUT + 1V; bold values indicate –40°C< TJ < +125°C; IOUT = 10mA; COUT = 10µF ceramic, unless
noted.
Fault Leakage Current
VFLG = 5.0V; VEN = 0V
0.05
μA
TJ Rising
165
°C
10
°C
Thermal Protection
Over-Temperature Shutdown
Over-Temperature Shutdown
Hysteresis
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any TA (ambient temperature) is (PD(max) = TJ(max) – TA) / θJA. Exceeding the maximum allowable power
dissipation will result in excessive die temperature and the regulator will go into thermal shutdown.
4. Specification for packaged product only.
5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential.
For outputs below 1.65V, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65V. Minimum
input operating voltage is 1.65V.
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Micrel, Inc.
MIC69301/2/3
Typical Characteristics
Power Supply
Rejection Ratio
70
60
1.4
1.0
200
40
0.8
150
30
VIN = 3.3V
10 VOUT = 1.8V
IOUT = 0.5A
0
1K 10K
FREQUENCY (Hz)
Dropout Voltage
vs. Temperature
400
350
IOUT = 3A
300
250
35
VOUT = 1.2V
COUT = 10µF
0.5 1.0 1.5 2.0 2.5
OUTPUT CURRENT (A)
0.2
3.0
Ground Current
vs. Output Current
IOUT = 1.5A
150
45
40
35
30
25
VOUT = 1.2V
COUT = 10µF
20 40 60 80
TEMPERATURE (°C)
50
0
15
Output Voltage
vs. Temperature
1.220
1.215
VIN = 2.2V
VOUT = 1.2V
COUT = 10µF
5
0
0
7
0.5 1.0 1.5 2.0 2.5
OUTPUT CURRENT (A)
Current Limit
vs. Temperature
VIN = 2.2V
VOUT = 1.2V
IOUT = 10mA
COUT = 10µF
20 40 60 80
TEMPERATURE (°C)
1.190
1.185
1.180
0
3
20
15
IOUT = 1.5A
10 VIN = 2.2V
5 VOUT = 1.2V
COUT = 10µF
0
20 40 60 80
TEMPERATURE (°C)
Load Regulation
1.300
1.175
2
1
IOUT = 3A
1.200
3
1.195
Ground Current
vs. Temperature
1.225
4
1.200
2.5
1.250
5
1.205
0.5
1.0
1.5
2.0
INPUT VOLTAGE (V)
1.275
6
1.210
VOUT = 1.2V
COUT = 10µF
30
25
10
100
0
0
50
20
200
1.5A
3A
0.4
50
0
0
500mA
0.6
100
20
Dropout Voltage
vs. Input Voltage
1.2
250
50
1.0
300
Dropout Voltage
vs. Output Current
VIN = 2.2V
VOUT = 1.2V
COUT = 10µF
20 40 60 80
TEMPERATURE (°C)
1.150
1.125
1.100
0
VIN = 2.2V
VOUT = 1.2V
COUT = 10µF
0.5 1.0 1.5 2.0 2.5
OUTPUT CURRENT (A)
3.0
Enable Threshold
vs. Temperature
0.9
0.8
0.7
0.6
ON
0.5
OFF
0.4
0.3 V = 2.2V
IN
0.2 VOUT = 1.2V
I
0.1 OUT = 100mA
COUT = 10µF
0
20 40 60 80
TEMPERATURE (°C)
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Micrel, Inc.
MIC69301/2/3
Functional Characteristics
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Micrel, Inc.
MIC69301/2/3
Functional Diagram
Fixed Output Regulator
IN
OUT
ENABLE
EN
0.5V
VREF
ADJ
GND
Adjustable Output Regulator
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Micrel, Inc.
MIC69301/2/3
Minimum Load Current
The MIC69301/2/3 regulator is specified between finite
loads. If the output current is too small, leakage currents
dominate and the output voltage rises. A 10mA minimum
load current is necessary for proper operation.
Application Information
The MIC69301/2/3 is an ultra-high performance low
dropout linear regulator designed for high current
applications requiring a fast transient response. It utilizes
a single input supply and has a very low dropout voltage
perfect for low-voltage DC-to-DC conversion. The
MIC69301/2/3 requires a minimum number of external
components.
The MIC69301/2/3 regulator is fully protected from
damage due to fault conditions offering constant current
limiting and thermal shutdown.
Adjustable Regulator Design
The MIC69302 and MIC69303 adjustable version allows
programming the output voltage anywhere between 0.5V
and 5.0V with two resistors. The resistor value between
VOUT and the adjust pin should not exceed 10kΩ. Larger
values can cause instability. The resistor values are
calculated by:
Input Supply Voltage
VIN provides a high current to the collector of the pass
transistor. The minimum input voltage is 1.65V allowing
conversion from low voltage supplies.
⎛R
⎞
VOUT = 0.5 × ⎜⎜ 1 + 1⎟⎟
⎝ R2
⎠
where VOUT is the desired output voltage.
Output Capacitor
The MIC69301/2/3 requires a minimum of output
capacitance to maintain stability. However, proper
capacitor selection is important to ensure desired
transient response. The MIC69301/2/3 is specifically
designed to be stable with low ESR ceramic chip
capacitors. A 10µF ceramic chip capacitor should satisfy
most applications. Output capacitance can be increased
without bound. See typical characteristics for examples
of load transient response.
X7R dielectric ceramic capacitors are recommended
because of their temperature performance. X7R-type
capacitors change capacitance by only 15% over their
operating temperature range and are the most stable
type of ceramic capacitors. Z5U and Y5V dielectric
capacitors change value by as much as 50% and 60%,
respectively over their operating temperature ranges. To
use a ceramic chip capacitor with Y5V dielectric the
value must be much higher than an X7R ceramic or a
tantalum capacitor to ensure the same capacitance
value over the operating temperature range. Tantalum
capacitors have a very stable dielectric (10% over their
operating temperature range) and can also be used with
this device.
Enable
The fixed output voltage versions of the MIC69301
feature an active high enable input (EN) that allows onoff control of the regulator. Current drain reduces to near
“zero” when the device is shutdown, with only
microamperes of leakage current. EN may be directly
tied to VIN and pulled up to the maximum supply voltage.
Thermal Design
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. Thermal design requires the following
application-specific parameters:
• Maximum ambient temperature (TA)
• Output current (IOUT)
• Output voltage (VOUT)
• Input voltage (VIN)
• Ground current (IGND)
First, calculate the power dissipation of the regulator
from these numbers and the device parameters from this
data sheet.
PD = (VIN – VOUT) x IOUT + VIN x IGND
where the ground current is approximated by using
numbers from the “Electrical Characteristics” or “Typical
Characteristics” sections. The heat sink thermal
resistance is then determined with this formula:
Input Capacitor
An input capacitor of 1µF or greater is recommended
when the device is more than 4 inches away from the
bulk supply capacitance or when the supply is a battery.
Small, surface mount, ceramic chip capacitors can be
used for the bypassing. The capacitor should be placed
within 1 inch of the device for optimal performance.
Larger values will help to improve ripple rejection by
bypassing the input to the regulator further improving the
integrity of the output voltage.
March 2011
θSA = ((TJ(max) – TA)/ PD) – (θJC + θCS)
Where TJ(max) ≤125°C and θCS is between 0°C and
2°C/W.
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Micrel, Inc.
MIC69301/2/3
The heat sink may be significantly reduced in
applications where the minimum input voltage is known
and is large compared with the dropout voltage. Use a
series input resistor to drop excessive voltage and
distribute the heat between this resistor and the
regulator. The low dropout properties of Micrel Super
βeta PNP® regulators allow significant reductions in
regulator power dissipation and the associated heat sink
March 2011
without compromising performance. When this technique
is employed, a capacitor of at least 1.0µF is needed
directly between the input and regulator ground.
Refer to “Application Note 9” for further details and
examples on thermal design and heat sink applications.
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Micrel, Inc.
MIC69301/2/3
Package Information
5-Pin S-PAK (R)
5-Pin TO-263 (U)
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Micrel, Inc.
MIC69301/2/3
8-Pin ePad SOIC (ME)
12-Pin ePad MLF 4x4 (ML)
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Micrel, Inc.
MIC69301/2/3
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
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© 2010 Micrel, Incorporated.
March 2011
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