MICREL MIC29302AWD

MIC29302A
3A Fast-Response LDO Regulator
General Description
Features
The MIC29302A is a high-current, low-cost, low-dropout
voltage regulator which uses Micrel's proprietary Super
βeta PNP® process with a PNP pass element. The 3A
LDO regulator features 450mV (full load) dropout voltage
and very low ground current. Designed for high-current
loads, these devices also find applications in lower current,
low dropout-critical systems, where their dropout voltage
and ground current values are important attributes.
Along with a total accuracy of ±2% (over temperature, line
and load regulation) the regulator features very-fast
transient recovery from input voltage surges and output
load current changes.
The MIC29302A has an adjustable output which can be
set by two external resistors to a voltage between 1.24V to
15V. In addition, the device is fully protected against over
current faults, reversed input polarity, reversed lead
insertion, and overtemperature operation. A TTL logic
enable (EN) pin is available in the MIC29302A to
shutdown the regulator. When not used, the device can be
set to continuous operation by connecting EN to the input
(IN). The MIC29302A is available in the standard and 5-pin
TO-263 and TO-252 packages with an operating junction
temperature range of −40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• High-current capability
− 3A over full temperature range
• Low-dropout voltage of 450mV at full load
• Low ground current
• Accurate 1% guaranteed tolerance
• Extremely-fast transient response
• Zero-current shutdown mode
• Error flag signals output out-of-regulation
• Adjustable output voltage
• Packages: TO-263-5L and TO-252-5L
Applications
•
•
•
•
•
•
•
Processor peripheral and I/O supplies
High-efficiency “Green” computer systems
Automotive electronics
High-efficiency linear lower supplies
Battery-powered equipment
PC add-in cards
High-efficiency lost-regulator for switching supply
_________________________________________________________________________________________________________________________
Typical Application
Dropout Voltage
vs. Output Current
⎛ R1 ⎞
VOUT = 1.242 × ⎜
+ 1⎟
⎝ R2
⎠
DROPOUT VOLTAGE (mV)
500
VIN = 3.3V
400
TA = 25ºC
VADJ = 0V
300
200
100
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT CURRENT (A)
MIC29302A Adjustable Output Regulator
Super ßeta PNP is a registered trademark of Micrel, 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
August 2011
M9999-080411-A
Micrel, Inc.
MIC29302A
Ordering Information
Part Number
Voltage
Junction Temperature Range
Package
MIC29302AWU
Adjustable
–40°C to +125°C
5-Pin TO-263
MIC29302AWD
Adjustable
–40°C to +125°C
5-Pin TO-252
Pin Configuration
5-Pin TO-263 (D2Pak) Adjustable Voltage (U)
MIC29302AWU
5-Pin TO-252 (D-Pak) Adjustable Voltage (D)
MIC29302AWD
Pin Description
Pin Number
TO-263
Pin Number
TO-252
Pin Name
1
1
EN
Pin Name
Enable (Input): Active-high CMOS compatible control input. Do not float.
2
2
IN
3, TAB
3, TAB
GND
GND: TAB is also connected internally to the IC’s ground on both packages.
4
4
OUT
OUTPUT: The regulator output voltage
5
5
ADJ
Feedback Voltage: 1.24V feedback from external resistor divider.
August 2011
INPUT: Unregulated input, +2.8V to +16V maximum
2
M9999-080411-A
Micrel, Inc.
MIC29302A
Absolute Maximum Ratings(1)
Operating Ratings(2)
Input Supply Voltage (VIN)(1) ........................... –20V to +20V
Enable Input Voltage (VEN)................................ –0.3V to VIN
Lead Temperature (soldering, 5sec.)......................... 260°C
Power Dissipation .....................................Internally Limited
Storage Temperature Range ....................–65°C to +150°C
ESD Rating all pins(3)
Operating Junction Temperature .............. −40°C to +125°C
Operating Input Voltage ....................................... 3V to 16V
Package Thermal Resistance
TO-263 (θJC).........................................................3°C/W
TO-252 (θJC).........................................................3°C/W
TO-252 (θJA) ......................................................35°C/W
TO-263 (θJA).......................................................28°C/W
Electrical Characteristics(4)
VIN = 4.2V; IOUT = 100mA; TA = 25°C, bold values indicate −40°C≤ TJ ≤ +125°C, unless noted.
Parameter
Condition
Min.
Typ.
Max.
Units
2
%
Output Voltage
−2
Output Voltage Accuracy
100mA ≤ IOUT ≤3A, (VOUT + 1V) ≤ VIN ≤ 16V
Line Regulation
IOUT = 100mA, (VOUT + 1V) ≤ VIN ≤ 16V
0.1
0.5
%
Load Regulation
VIN = VOUT + 1V, 100mA ≤ IOUT ≤ 3A
0.2
1
%
IOUT = 100mA
80
200
IOUT = 750mA
220
IOUT = 1.5A
275
IOUT = 3A
450
800
IOUT = 750mA, VIN = VOUT + 1V
5
20
IOUT = 1.5A
15
IOUT = 3A
60
IGRNDDO Ground Pin Current
@ Dropout
VIN = 0.5V less than specified VOUT × IOUT = 10mA
2
Current Limit
VOUT = 0V(7)
en, Output Noise Voltage
(10Hz to 100kHz
CL = 10µF
IL = 100mA
CL = 33 µF
260
Ground Pin Current in Shutdown
Input Voltage VIN = 16V
32
(6)
ΔVOUT = −1%
Dropout Voltage
mV
Ground Current
Ground Current
August 2011
3
4
400
3
mA
150
A
µV
(rms)
µA
M9999-080411-A
Micrel, Inc.
MIC29302A
Electrical Characteristics(4) (Continued)
VIN = 4.2V; IOUT = 10mA; TA = 25°C, bold values indicate −40°C≤ TJ ≤ +125°C, unless noted.
Reference
Reference Voltage
(8)
1.215
1.267
40
Adjust Pin Bias Current
120
V
nA
ENABLE Input
Input Logic Voltage
0.8
Low (OFF)
2.4
High (ON)
15
VEN = 8V
2
VEN = 0.8V
Regulator Output Current
in Shutdown
30
75
Enable Pin Input Current
V
µA
4
10
(10)
20
µA
Notes:
1.
Exceeding the absolute maximum rating may damage the device.
2.
The device is not guaranteed to function outside its operating rating.
3.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
4.
Specification for packaged product only
5.
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature change.
6.
Dropout voltage is defined as the input-to-output differential when output voltage drops to 99% of its normal value with VOUT + 1V applied to VIN.
7.
VIN =VOUT (nominal) + 1V. For example, use VIN = 4.3V for a 3.3Vregulator or use 6V for a 5V regulator. Employ pulse testing procedure for current limit.
8.
VREF ≤ VOUT ≤ VIN -1, 3V ≤ VOUT ≤ 16V, 10mA ≤ IL ≤ IFL, TJ ≤ TJmax.
9.
Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 250mA load pulse at VIN =16V (a 4W pulse) for T= 10ms.
10. VEN ≤ 0.8V, VIN ≤ 16V and VOUT = 0V.
August 2011
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Micrel, Inc.
MIC29302A
Typical Characteristics
GND Pin Current
vs. Input Voltage
Dropout Voltage
vs. Input Voltage
70.0
400
IOUT = 3A
300
200
IOUT = 1.0A
100
1.250
IOUT = 3A
60.0
ADJ PIN VOLTAGE (V)
GROUND CURRENT (mA)
50.0
40.0
30.0
20.0
V OUT = 1.8V
IOUT = 3A
1.245
1.240
1.235
10.0
0
1.230
0.0
0
4
8
12
16
0
4
8
12
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Adjust Pin Current
vs. Input Voltage
Load Regulation
vs. Input Voltage
46
0
16
LOAD REGULATION (%)
42
40
4
8
12
12
16
10
V OUT = 1.8V
IOUT = 10mA to 3A
0.200
0.100
V OUT = 0V
8
6
4
2
0.000
0
8
Short-Circuit Current
vs. Input Voltage
0.300
ILOAD = 10mA
44
4
INPUT VOLTAGE (V)
CURRENT LIMIT (A)
DROPOUT VOLTAGE (mV)
500
ADJ PIN CURRENT (nA)
Adjust Pin Voltage
vs. Input Voltage
16
0
0
INPUT VOLTAGE (V)
4
8
12
16
INPUT VOLTAGE (V)
Enable Pin Current
vs. Input Voltage
0
4
8
12
16
INPUT VOLTAGE (V)
Output Voltage
vs. Input Voltage
20.00
1.243
15.00
OUTPUT VOLTAGE (V)
ENABLE PIN CURRENT (µA)
VOUT = 1.24V
IOUT = 10mA
10.00
VOUT = 1.8V
IOUT = 10mA
5.00
VEN = VIN
1.242
1.241
1.240
0.00
0
4
8
12
INPUT VOLTAGE (V)
August 2011
16
0
4
8
12
16
INPUT VOLTAGE (V)
5
M9999-080411-A
Micrel, Inc.
MIC29302A
Typical Characteristics (Continued)
Enable Bias Current
vs. Temperature (B06)
GND Pin Current
vs. Temperature
600
EN PIN CURRENT (nA)
IOUT = 750mA
6.00
4.00
2.00
VIN = VEN = 8V
25
VOUT = 2.5V
IOUT = 10mA
20
15
10
5
0.00
-25
0
25
50
75
100
125
IOUT = 3A
500
400
300
IOUT = 1.5A
200
VIN = 4.2V
100
0
0
-50
-50
-25
0
25
50
75
100
-50
125
-25
0
25
50
75
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
Dropout Voltage
vs. Temperature
Short-Circuit Current
vs. Temperature
Adjust Pin Voltage
vs. Temperature
400
VIN = 4.2V
CURRENT LIMIT (A)
IOUT = 750mA
300
200
100
100
125
100
125
1.243
4.250
ADJ PIN VOLTAGE (V)
GROUND CURRENT (mA)
VIN =4.2V
VOUT = 1.8V
8.00
DROPOUT VOLTAGE (mV)
30
10.00
DROPOUT VOLTAGE (mV)
Dropout Voltage
vs. Temperature
4.000
3.750
VIN = 4.2V
1.240
VIN =4.2V
1.238
VOUT = 1.8V
IOUT = 10mA
VOUT = 0V
IOUT = 100mA
0
3.500
-50
-25
0
25
50
75
100
125
1.235
-50
-25
0
25
50
75
TEMPERATURE (°C)
TEMPERATURE (°C)
Adjust Pin Current
vs. Temperature
Line Regulation
vs. Temperature
100
125
-50
-25
0
25
50
75
TEMPERATURE (°C)
0.5
80
LINE REGULATION (%/V)
ADJ PIN CURRENT (nA)
VIN = 3V to 16V
60
40
VIN = 4.2V
20
ILOAD = 10mA
0
VOUT = 1.8V
0.4
IOUT = 10mA
0.3
0.2
0.1
0.0
-50
-25
0
25
50
75
TEMPERATURE (°C)
August 2011
100
125
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
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Micrel, Inc.
MIC29302A
Typical Characteristics (Continued)
500
V IN = 3V
DROPOUT VOLTAGE (mV)
V ADJ = 0V
ADJUSTABLE OPTION
400
300
200
100
VIN = 4.2V
400
VADJ = 0V
300
200
100
0.5
1.0
1.5
2.0
2.5
0.0
3.0
0.5
1.0
Line Regulation
vs. Output Current
GROUND CURRENT (mA)
LINE REGULATION (%)
0.1
0.0
V IN = 4.2V to 16V
V OUT = 1.8V
-0.2
0.5
1.0
1.5
2.0
2.5
V IN =3.3V
V OUT = 1.8V
IOUT = 10mA
COUT = 22µF
1
10
FREQUENCY (kHz)
August 2011
100
1.0
1000
1.5
2.0
2.5
3.0
Output Noise
vs. Frequency
V IN = 4.2V
50
40
30
20
0.5
1.0
1.5
2.0
2.5
3.0
Noise Spectral
Density
100
10
1
VIN =3.3V
0.1
VOUT = 1.8V
IOUT = 3A
0.01
10
80
0.1
0.5
OUTPUT CURRENT (A)
V OUT = 1.8V
0.0
RIPPLE REJECTION (dB)
RIPPLE REJECTION (dB)
60
COUT = 47µF
0.001
0.01
0.1
80
60
50
30
20
VIN =3.3V
VOUT = 1.8V
IOUT = 1.5A
COUT = 22µF
10
0
0.01
0.1
1
10
FREQUENCY (kHz)
7
100
10
100
1000
Ripple Rejection (IOUT = 3A)
vs. Frequency
70
40
1
FREQUENCY (kHz)
Gain (dB)
Gain (dB)
40
0
0.01
0.0
3.0
Ripple Rejection (IOUT = 1.5A)
vs. Frequency
50
10
2.5
OUTPUT CURRENT (A)
60
20
2.0
1000
Ripple Rejection (IOUT = 10mA)
vs. Frequency
70
30
1.5
0
3.0
OUTPUT CURRENT (A)
80
1.238
GND Pin Current
vs. Output Current
70
0.2
0.0
1.240
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
-0.1
V OUT = 1.8V
1.242
OUTPUT NOISE (µV/√Hz)
0.0
V IN = 4.2V
1.244
1.236
0
0
Adjust Pin Voltage
vs. Output Current
1.246
RIPPLE REJECTION (dB)
DROPOUT VOLTAGE (mV)
500
Dropout Voltage
vs. Output Current
ADJ PIN VOLTAGE (V)
Dropout Voltage
vs. Output Current
1000
Gain (dB)
70
60
50
40
VIN =3.3V
30
IOUT = 3A
20
VOUT = 1.8V
COUT = 22µF
10
0
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
M9999-080411-A
Micrel, Inc.
MIC29302A
Functional Characteristics
Figure 2. MIC29302A Load Transient Response Test Circuit
August 2011
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M9999-080411-A
Micrel, Inc.
MIC29302A
Functional Diagram
August 2011
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M9999-080411-A
Micrel, Inc.
MIC29302A
First, we calculate the power dissipation of the regulator
from these numbers and the device parameters from this
datasheet:
Application Information
The MIC29302A is a high-performance, low-dropout
voltage regulator suitable for all moderate to high-current
voltage regulation applications. Its 450mV typical
dropout voltage at full load makes it especially valuable
in battery-powered systems and as high efficiency noise
filters in “post-regulator” applications. Unlike older NPNpass transistor designs, where the minimum dropout
voltage is limited by the base-emitter voltage drop and
collector-emitter saturation voltage, dropout performance
of the PNP output is limited merely by the low VCE
saturation voltage.
A trade-off for the low-dropout voltage is a varying base
driver requirement. But Micrel’s Super ßeta PNP®
process reduces this drive requirement to merely 1% of
the load current.
The MIC29302A regulator is fully protected from damage
due to fault conditions. Current limiting is linear; output
current under overload conditions is constant. Thermal
shutdown disables the device when the die temperature
exceeds the 125°C maximum safe operating
temperature. The output structure of the regulators
allows voltages in excess of the desired output voltage
to be applied without reverse current flow. The
MIC29302A offer a logic level ON/OFF control: when
disabled, the devices draw nearly zero current.
PD = IOUT (1.02VIN − VOUT )
Where the ground current is approximated by 2% of IOUT.
Then the heat sink thermal resistance is determined with
this formula:
− TA
T
θ SA = JMAX
− (θ JC + θ CS )
PD
where:
TJMAX ≤ 125°C and θCS is between 0 and 2°C/W.
The heat sink may be significantly reduced in
applications where the minimum input voltage is known
and is large compared to the dropout voltage. A series
input resistor can be used 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 very significant reductions in
regulator power dissipation and the associated heat sink
without compromising performance. When this technique
is employed, a capacitor of at least 0.1µF is needed
directly between the input and regulator ground.
Please refer to Application Note 9 and Application Hint
17 on Micrel’s website (www.micrel.com) for further
details and examples on thermal design and heat sink
specification.
With no heat sink in the application, calculate the
junction temperature to determine the maximum power
dissipation that will be allowed before exceeding the
maximum junction temperature of the MIC29302A. The
maximum power allowed can be calculated using the
thermal resistance (θJA) of the D-Pak (TO252) adhering
to the following criteria for the PCB design: 2 oz. copper
and 100mm2 copper area for the MIC29302A.
For example, given an expected maximum ambient
temperature (TA) of 75°C with VIN = 3.3V, VOUT = 2.5V,
and IOUT = 1.5A, first calculate the expected PD using:
Figure 3. Linear Regulators Require Only Two Capacitors
for Operation
Thermal Design
Linear regulators are simple to use. The most
complicated set of 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
August 2011
PD = (3.3V − 2.5V ) × 3A − (3.3V ) × (0.016A ) = 2.3472W
10
M9999-080411-A
Micrel, Inc.
MIC29302A
Next, calcualte the junction temperature for the expected
power dissipation:
For best performance the total resistance (R1+R2)
should be small enough to pass the minimum regulator
load current of 10mA.
TJ = (θJA×PD) + TA = (35°C/W × 2.3472W)
+ 75°C = 157.15°C
Adjustable Regulator Design
The output voltage can be programmed anywhere
between 1.25V and the 15V. Two resistors are used.
The resistor values are calculated by:
Now determine the maximum power dissipation allowed
that would not exceed the IC’s maximum junction
temperature (125°C) without the use of a heat sink by:
⎛V
⎞
R1 = R 2 × ⎜⎜ OUT − 1⎟⎟
⎝ 1.240
⎠
PD(MAX) = (TJ(MAX) – TA) / θJA
= (125°C – 75°C) / (35°C/W)
= 1.428W
where VOUT is the desired output voltage.
Capacitor Requirements
For stability and minimum output noise, a capacitor on
the regulator output is necessary. The value of this
capacitor is dependent upon the output current; lower
currents allow smaller capacitors. The MIC29302A is
stable with a 10μF capacitor at full load.
This capacitor need not be an expensive low-ESR type;
aluminum electrolytics are adequate. In fact, extremely
low-ESR capacitors may contribute to instability.
Tantalum capacitors are recommended for systems
where fast load transient response is important.
When the regulator is powered from a source with high
AC impedance, a 0.1µF capacitor connected between
input and GND is recommended.
Figure 4 shows component definition. Applications with
widely varying load currents may scale the resistors to
draw the minimum load current required for proper
operation (see “Minimum Load Current” section).
Transient Response and 5V to 3.3V Conversion
The MIC29302A has excellent response to variations in
input voltage and load current. By virtue of its low
dropout voltage, the device does not saturate into
dropout as readily as similar NPN-based designs. A 3.3V
output Micrel LDO will maintain full speed and
performance with an input supply as low as 4.2V, and
will still provide some regulation with supplies down to
3.8V, unlike NPN devices that require 5.1V or more for
good performance and become nothing more than a
resistor under 4.6V of input. Micrel’s PNP regulators
provide superior performance in “5V to 3.3V” conversion
applications than NPN regulators, especially when all
tolerances are considered.
Figure 4. Adjustable Regulator with Resistors
Enable Input
MIC29302A features an enable (EN) input that allows
ON/OFF control of the device. Special design allows
“zero” current drain when the device is disabled—only
microamperes of leakage current flows. The EN input
has TTL/CMOS compatible thresholds for simple
interfacing with logic, or may be directly tied to VIN.
Enabling the regulator requires approximately 20µA of
current into the EN pin.
Minimum Load Current
The MIC29302A regulator operates within a specified
load range. If the output current is too small, leakage
currents dominate and the output voltage rises.
A minimum load current of 10mA is necessary for proper
regulation and to swamp any expected leakage current
across the operating temperature range.
August 2011
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M9999-080411-A
Micrel, Inc.
MIC29302A
Evaluation Board Schematic
August 2011
12
M9999-080411-A
Micrel, Inc.
MIC29302A
Bill of Materials
Item
Part Number
C2012X5R0J106K
C1
C2,C3
C5
Manufacturer
TDK
GRM2196R60J106K
Murata(2)
08056D106KAT2A
Vishay(3)
B45196H4106K309
Kemet
TR3C106K020C0450
Vishay
EEU-FM1C102
Description
Qty.
(1)
10µF, 6.3V, Ceramic Capacitor, X5R, 0805
1
10µF, 20V, Tantalum Capacitor, 2312
2
1000µF, 16V, Elect Capacitor, through hole, 10X20-case
1
100µF, 20V, Tantalum Capacitor, 2917
1
(4)
(3)
Panasonic(5)
T495D107K016ATE125
Kemet(4)
TR3D107K016C0125
Vishay(3)
R1
CRCW06031K00FKTA
Vishay(3)
1K, Resistor, 1%, 0603
1
R2
Open (CRCW06031002FRT1)
Vishay(3)
10K, Resistor, 1%, 0603
1
R3
CRCW06038061FRT1
Vishay(3)
8.06K, Resistor, 1%, 0603
1
CRCW06034751FRT1
(3)
4.75K, Resistor, 1%, 0603
1
(3)
C6
R4
Vishay
R5
CRCW06033241FRT1
Vishay
3.24K, Resistor, 1%, 0603
1
R6
CRCW06031911RFRT1
Vishay(3)
1.91k, Resistor, 1%, 0603
1
0Ω, Resistor, 1%, 0603
1
R7
CRCW06030000FKTA
(3)
Vishay
(3)
R8
CRCW060350R0FRT1
Vishay
50Ω, Resistor, 1%, 0603
1
U1
MIC29302AWU
Micrel(6)
3A Fast-Response LDO Regulator
1
Notes:
1.
TDK: www.tdk.com.
2.
Murata: www.murata.com.
3.
Vishay: www.vishay.com.
4.
Kemet: www.kemet.com.
5.
Panasonic.: www.panasonic.com.
6.
Micrel, Inc.: www.micrel.com.
August 2011
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Micrel, Inc.
MIC29302A
PCB Layout Recommendations
MIC29302A Evaluation Board Top Layer
MIC29302A Evaluation Board Top Silk
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MIC29302A
PCB Layout Recommendations (Continued)
MIC29302A Evaluation Board Bottom Layer
MIC29302A Evaluation Board Bottom Silk
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MIC29302A
Package Information
5-Pin TO-263 (U)
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MIC29302A
Package Information (Continued)
5-Pin TO-252 (D)
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MIC29302A
Recommended Landing Pattern
5-Pin TO-263 (U)
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MIC29302A
Recommended Landing Pattern (Continued)
5-Pin TO-252 (D)
August 2011
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Micrel, Inc.
MIC29302A
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
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
indemnify Micrel for any damages resulting from such use or sale.
© 2011 Micrel, Incorporated.
August 2011
20
M9999-080411-A