MICREL MIC2295YD5

MIC2295
High Power Density 1.2A
Boost Regulator
General Description
Features
The MIC2295 is a 1.2Mhz, PWM dc/dc boost switching
regulator available in low profile Thin SOT23 and 2mm x
2mm MLF™ package options. High power density is
achieved with the MIC2295’s internal 34V / 1.2A switch,
allowing it to power large loads in a tiny footprint.
The MIC2295 implements constant frequency 1.2MHz
PWM current mode control. The MIC2295 offers internal
compensation that offers excellent transient response and
output regulation performance.
The high frequency
operation saves board space by allowing small, low-profile
external components. The fixed frequency PWM scheme
also reduces spurious switching noise and ripple to the
input power source.
The MIC2295 is available in a low-profile Thin SOT23 5lead package and a 2mm x2mm 8-lead MLF™ leadless
package. The 2mm x 2mm MLF™ package option has an
output over-voltage protection feature.
The MIC2295 has an operating junction temperature range
of –40°C to +125°C
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Applications
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R1
49.9k
2.2µF
AGND
L1
10µH
PGND
VOUT
5V/500mA
MIC2295 BD5
MIC2295BML
SW
VIN
OVP
FB
EN
C1
2.2µF
Organic EL power supplies
3.3V to 5V/500mA conversion
TFT-LCD bias supplies
Flash LED drivers
Positive and negative output regulators
SEPIC converters
Positive to negative Cuk converters
12V supply for DSL applications
Multi-output dc/dc converters
VOUT
15V/100mA
10µH
VIN
1-Cell
Li Ion
3V to 4.2V
2.5V to 10V input voltage range
Output voltage adjustable to 34V
1.2A switch current
1.2MHz PWM operation
Stable with small size ceramic capacitors
High efficiency
Low input and output ripple
<1µA shutdown current
UVLO
Output over-voltage protection (MIC2295BML)
Over temperature shutdown
Thin SOT23-5 package option
2mm x 2mm leadless 8-lead MLF™ package option
–40oC to +125oC junction temperature range
R2
4.53K
VIN
1-Cell
Li Ion
C1
2.2µF
VIN
SW
EN
FB
GND
R1
10k
10µF
R2
3.3k
MLF and MicroLeadFrame is a trademark of Amkor Technology
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2005
M9999-042605
(408) 955-1690
Micrel, Inc.
MIC2295
Ordering Information
Part Number
Marking Code
Standard
Lead-Free
Output Over
Voltage Protection
Standard
Lead-Free
Junction Temperature
Range
Package
MIC2295BD5
MIC2295YD5
—
SVAA
SVAA
-40°C to 125°C
Thin SOT23-5
MIC2295BML
MIC2295YML
34V
SXA
SXA
-40°C to 125°C
2mm x2mm
MLF-8L
Pin Configuration
Pin Description
MIC2295BD5
MIC2295BML
Thin SOT-23-5
2x2 MLF-8L
1
7
SW
2
—
GND
3
6
FB
Feedback (Input): 1.24V output voltage sense node. VOUT =
1.24V ( 1 + R1/R2)
4
3
EN
Enable (Input): Logic high enables regulator. Logic low
shuts down regulator.
5
2
VIN
Supply (Input): 2.5V to 10V input voltage.
Pin Name
Pin Function
Switch Node (Input): Internal power BIPOLAR collector.
Ground (Return): Ground.
—
1
OVP
Output Over-Voltage Protection (Input): Tie this pin to VOUT
to clamp the output voltage to 34V maximum in fault
conditions. Tie this pin to ground if OVP function is not
required.
—
5
N/C
No connect. No internal connection to die.
—
4
AGND
Analog ground
—
8
PGND
Power ground
—
EP
GND
April 2005
Ground (Return). Exposed backside pad.
2
M9999-042605
(408) 955-1690
Micrel, Inc.
MIC2295
Absolute Maximum Rating (1)
Operating Range (2)
Supply voltage (VIN)........................................................12V
Switch voltage (VSW) ........................................ -0.3V to 34V
Enable pin voltage (VEN)....................................... -0.3 to VIN
FB Voltage (VFB)...............................................................6V
Switch Current (ISW) ......................................................2.5A
Ambient Storage Temperature (TS)............-65°C to +150°C
ESD Rating(3) ................................................................. 2KV
Supply Voltage (VIN).......................................... 2.5V to 10V
Junction Temperature Range (TJ)..............-40°C to +125°C
Package Thermal Impedance
θJA 2x2 MLF-8 lead ............................................93°C/W
θJA Thin SOT-23-5 lead ...................................256°C/W
Electrical Characteristics
TA=25oC, VIN =VEN = 3.6V, VOUT = 15V, IOUT = 40mA, unless otherwise noted. Bold values indicate -40°C ≤ TJ ≤ 125°C.
Symbol
Parameter
Condition
Min
VIN
Supply Voltage Range
2.5
VUVLO
Under-Voltage Lockout
1.8
IVIN
Quiescent Current
VFB = 2V (not switching)
(4)
ISD
Shutdown Current
VEN = 0V
VFB
Feedback Voltage
(+/-1%)
1.227
(+/-2%) (Over Temp)
1.215
IFB
Units
10
V
2.1
2.4
V
2.8
5
mA
0.1
1
µA
1.24
1.252
1.265
VFB = 1.24V
-450
Line Regulation
3V ≤ VIN ≤ 5V
0.04
Load Regulation
5mA ≤ IOUT ≤ 40mA
Maximum Duty Cycle
ISW
Switch Current Limit
Note 5
VSW
Switch Saturation Voltage
ISW
Switch Leakage Current
VEN
Enable Threshold
IEN
Enable Pin Current
fSW
Oscillator Frequency
VOVP
Output over-voltage protection
TJ
Over-Temperature Threshold
Shutdown
2.
3.
4.
5.
Max
Feedback Input Current
DMAX
Notes:
1.
Typ
V
nA
1
%
1.5
%
85
90
%
1.2
1.7
A
ISW = 1.2A
600
mV
VEN = 0V, VSW = 10V
0.01
TURN ON
5
1.5
TURN OFF
0.4
VEN = 10V
MIC2295BML only
Hysteresis
µA
V
20
40
µA
1.05
1.2
1.35
MHz
30
32
34
V
150
°C
10
°C
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when
operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction
temperature, TJ(Max), the junction-to-ambient thermal resistance, θ JA, and the ambient temperature, TA. The maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
This device is not guaranteed to operate beyond its specified operating rating.
IC devices are inherently ESD sensitive. Handling precautions required. Human body model rating: 1.5K in series with 100pF.
ISD = IVIN.
Guaranteed by design.
April 2005
3
M9999-042605
(408) 955-1690
Micrel
MIC2295
Typical Characteristics
C3
MIC2295 -5V Output
80
L1
VIN = 5V
75
70
65
C1
1 F/
6.3V
60
55
50
1uF/16V
5
1
VIN
SW
4
EN
C2
4.7uF/
6.3V
OVP
FB
Vin=5V
40
CMHSH5-2L
MIC2295BML
Vin=4V
45
VOUT = -5V @ 0.15A
L2
3
R1
10K
GND
Vin=5.5V
2
35
R3
10K
30
0
100
200
300
Output Current
L1 = Murata LQH32CN4R7M23
L2 = Murata LQH32CN4R7M23
C4
1uF/
6.3V
MIC6211
+
-
R2
2.49K
Sumida
CDRH4D18
4.7µH
15V Short circuit
protected Boost
85
80
75
1-Cell
Li Ion
70
10µF/
6.3V
4
5
1
VIN
SW
EN
0.1uF/
6.3V
160K
MIC2295
FB
Vin=2.5
V
Vin=3V
65
VOUT = 15V / 50mA
GND
2
4.7µF/
25V
3
10K
60
0
20
40
60
80
OUTPUT CURRENT (mA)
April 2005
100
CIN = JMK212BJ106MG (Taiyo Yuden)
4
M9999-042605
(408) 955-1690
Micrel
MIC2295
VIN = 3.3V to 5.5V
78
C1
F/
6.3V
72
70
5
1
SW
66
MBRX140
4.7uH
L2
VOUT = 5V @ 0.3A
C4
470pF/
10V
R1
43.2K
MIC2295BML
4
EN
Vin=3V
Vin=3.5V
Vin=4V
Vin=5V
Vin=5.5V
68
1uF/16V
VIN
76
74
C3
L1
4.7uH
MIC2295 SEPIC 5V Output
FB
C2
4.7uF/
6.3V
3
GND
2
R2
14.3K
64
0
50
100
150
200
250
OUTPUT CURRENT (mA)
L1 = Murata LQH32CN4R7M23
L2 = Murata LQH32CN4R7M23
5V MIC2295 SEPIC with on
coupled inductor
C3
1µF/16V
L1
4.7µH
VIN = 3.5V to 5.5V
80
VIN
70
60
55
SW
4
FB
GND
45
50
100
150
200
250
C2
4.7µF
6.3V
R2
14.3k
L1 = Sumida CL5DS 1 1/HP
30
0
3
2
Vin=2.5
V
Vin=3.3
V
Vin=5V
35
C4
470pF
10V
R1
43.2k
EN
50
40
VOUT = 5V @ 0.3A
MIC2295BML
C1
4.7µF
6.3V
65
L1
4.7µH
1
5
75
MBRX140
300
LOAD CURRENT (mA
MIC2295 12V output Efficiency
Input Voltage
vs. Supply Voltage
Max Duty Cycle vs Input Voltage
90
85
80
100
1.5
95
1.3
90
75
1.1
85
0.9
70
Vin=3.3V
Vin=4.2V
Vin=3.6V
65
80
0.7
75
0.5
60
70
50
100
150
200
2.5
2.5
OUTPUT CURRENT (mA)
Switch Voltage
vs. Supply Voltage
250
85
200
80
150
75
100
70
50
65
4.5
6.5
Input Voltage (V)
April 2005
8.5
7
8.5
10
Vin=3.3V
Vin=4V
Vin=4.2V
60
0
50
100
150
OUTPUT CURRENT (mA)
5
200
4
5.5
7
8.5
10
SUPPLY VOLTAGE (V)
Feedback Voltage
vs. Temperature
MIC2295 15V output Efficiency
90
2.5
5.5
SUPPLY VOLTAGE (V)
300
0
4
FEEDBACK VOLTAGE (V)
0
1.30
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
M9999-042605
(408) 955-1690
Micrel
MIC2295
1.2
1.1
1.0
0.9
0.8
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
FEEDBACK CURRENT (nA)
700
Load Regulation
12.15
12.1
12.05
12
11.95
11.9
V
11.85
11.8
0
IN
25
= 3.6V
50 75 100 125 150
LOAD (mA)
100
MAXIMUM DUTY CYCLE (%)
1.3
12.2
OUTPUT VOLTAGE (V)
FREQUENCY (MHz)
1.4
Frequency
vs. Temperature
Maximum Duty Cycle
vs. Supply Voltage
98
96
94
92
90
88
86
84
82
80
2.5
4
5.5
7
8.5
SUPPLY VOLTAGE (V)
10
FB Pin Current
vs. Temperature
600
500
400
300
200
100
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
April 2005
6
M9999-042605
(408) 955-1690
Micrel
MIC2295
Functional Characteristics
Switching Waveforms
3.2V
12VOUT
150mA Load
Time (400µs/div)
OUTPUT VOLTAGE
(50mV/div)
Output Voltage
Inductor Current
(10µH)
SWITCH SATURATION
(5V/div)
INPUT VOLTAGE
(2V/div)
4.2V
INDUCTOR CURRENT
(500mA/div)
OUTPUT VOLTAGE
(1mV/div) AC-Coupled
Line Transient Response
VSW
3.6VIN
12VOUT
150mA
Time (400ns/div)
Enable Characteristics
LOAD CURRENT
OUTPUT VOLTAGE
(2V/div.)
(5V/div.)
VIN = 3.6V
VIN=3.6V
3.6VIN
12VOUT
150mA Load
TIME (400µs/div.)
April 2005
7
M9999-042605
(408) 955-1690
Micrel
MIC2295
Functional Description
The MIC2295 is a high power density, PWM dc/dc boost
regulator. The block diagram is shown in Figure 1. The
MIC2295 is composed of an oscillator, slope
compensation ramp generator, current amplifier, gm error
amplifier, PWM generator, and a 1.2A bipolar output
transistor. The oscillator generates a 1.2MHz clock. The
clock’s two functions are to trigger the PWM generator that
turns on the output transistor, and to reset the slope
compensation ramp generator. The current amplifier is
used to measure the switch current by amplifying the
voltage signal from the internal sense resistor. The output
of the current amplifier is summed with the output of the
VIN
FB
slope compensation ramp generator. This summed
current-loop signal is fed to one of the inputs of the PWM
generator.
The gm error amplifier measures the feedback voltage
through the external feedback resistors and amplifies the
error between the detected signal and the 1.24V reference
voltage. The output of the gm error amplifier provides the
voltage-loop signal that is fed to the other input of the
PWM generator. When the current-loop signal exceeds
the voltage-loop signal, the PWM generator turns off the
bipolar output transistor. The next clock period initiates the
next switching cycle, maintaining constant frequency
current-mode PWM control
EN
OVP*
MIC2295
OVP*
SW
PWM
Generator
gm
VREF
1.24V
Σ
1.2MHz
Oscillator
Ramp
Generator
CA
GND
*OVP available on MLFTM package option only.
MIC2295 Block Diagram
April 2005
8
M9999-042605
(408) 955-1690
Micrel
MIC2295
Application Information
DC to DC PWM Boost Conversion
The MIC2295 is a constant frequency boost converter. It
operates by taking a DC input voltage and regulating a
higher DC output voltage. Figure 2 shows a typical circuit.
VIN
L1
10mH
D1
VOUT
MIC2288BML
VIN
C1
2.2µF
SW
OVP
EN
R1
C2
10µF
FB
GND
GND
R2
GND
Figure 2
Boost regulation is achieved by turning on an internal
switch, which draws current through the inductor (L1).
When the switch turns off, the inductor’s magnetic field
collapses, causing the current to be discharged into the
output capacitor through an external Schottkey diode (D1).
Voltage regulation is achieved my modulating the pulse
width or pulse width modulation (PWM).
Duty Cycle Considerations
Duty cycle refers to the switch on-to-off time ratio and can
be calculated as follows for a boost regulator;
V
D = 1− IN
VOUT
The duty cycle required for voltage conversion should be
less than the maximum duty cycle of 85%. Also, in light
load conditions where the input voltage is close to the
output voltage, the minimum duty cycle can cause pulse
skipping. This is due to the energy stored in the inductor
causing the output to overshoot slightly over the regulated
output voltage. During the next cycle, the error amplifier
detects the output as being high and skips the following
pulse. This effect can be reduced by increasing the
minimum load or by increasing the inductor value.
Increasing the inductor value reduces peak current, which
in turn reduces energy transfer in each cycle.
Over Voltage Protection
For MLF package of MIC2295, there is an over voltage
protection function. If the feedback resistors are
disconnected from the circuit or the feedback pin is
shorted to ground, the feedback pin will fall to ground
potential. This will cause the MIC2295 to switch at full
duty-cycle in an attempt to maintain the feedback voltage.
As a result the output voltage will climb out of control. This
may cause the switch node voltage to exceed its maximum
voltage rating, possibly damaging the IC and the external
April 2005
components. To ensure the highest level of protection, the
MIC2295 OVP pin will shut the switch off when an overvoltage condition is detected saving itself and other
sensitive circuitry downstream.
Component Selection
Inductor
Inductor selection is a balance between efficiency,
stability, cost, size and rated current. For most applications
a 10µH is the recommended inductor value. It is usually a
good balance between these considerations. Efficiency is
affected by inductance value in that larger inductance
values reduce the peak to peak ripple current. This has an
effect of reducing both the DC losses and the transition
losses.
There is also a secondary effect of an inductors DC
resistance (DCR). The DCR of an inductor will be higher
for more inductance in the same package size. This is due
to the longer windings required for an increase in
inductance. Since the majority of input current (minus the
MIC2295 operating current) is passed through the
inductor, higher DCR inductors will reduce efficiency.
Also, to maintain stability, increasing inductor size will
have to be met with an increase in output capacitance.
This is due to the unavoidable “right half plane zero” effect
for the continuous current boost converter topology. The
frequency at which the right half plane zero occurs can be
calculated as follows;
Frhpz =
VIN 2
VOUT × L × IOUT × 2 π
The right half plane zero has the undesirable effect of
increasing gain, while decreasing phase. This requires that
the loop gain is rolled off before this has significant effect
on the total loop response. This can be accomplished by
either reducing inductance (increasing RHPZ frequency) or
increasing the output capacitor value (decreasing loop
gain).
Output Capacitor
Output capacitor selection is also a trade-off between
performance, size and cost. Increasing output capacitance
will lead to an improved transient response, but also an
increase in size and cost. X5R or X7R dielectric ceramic
capacitors are recommended for designs with the
MIC2295. Y5V values may be used, but to offset their
tolerance over temperature, more capacitance is required.
The following table shows the recommended ceramic
(X5R) output capacitor value vs. output voltage.
Output Voltage
<6V
<16V
<34V
9
Recommended Output
Capacitance
10µF
4.7µF
2.2µF
M9999-042605
(408) 955-1690
Micrel
MIC2295
Diode Selection
The MIC2295 requires an external diode for operation. A
Schottkey diode is recommended for most applications
due to their lower forward voltage drop and reverse
recovery time. Ensure the diode selected can deliver the
peak inductor current and the maximum reverse voltage is
rated greater than the output voltage.
Capacitor Selection
Multi-layer ceramic capacitors are the best choice for input
and output capacitors. They offer extremely low ESR,
allowing very low ripple, and are available in very small,
cost effective packages. X5R dielectrics are preferred. A
4.7µF to 10µF output capacitor is suitable for most
applications.
Input Capacitor
A minimum 1µF ceramic capacitor is recommended for
designing with the MIC2295. Increasing input capacitance
will improve performance and greater noise immunity on
the source. The input capacitor should be as close as
possible to the inductor and the MIC2295, with short traces
for good noise performance.
Diode Selection
For maximum efficiency, Schottky diode is recommended
for use with MIC2295. An optimal component selection can
be made by choosing the appropriate reverse blocking
voltage rating and the average forward current rating for a
given application. For the case of maximum output voltage
(34V) and maximum output current capability, a 40V / 1A
Schottky diode should be used.
Feedback Resistors
The MIC2295 utilizes a feedback pin to compare the
output to an internal reference. The output voltage is
adjusted by selecting the appropriate feedback resistor
values. The desired output voltage can be calculated as
follows;
⎛ R1 ⎞
VOUT = VREF × ⎜
+ 1⎟
⎝ R2 ⎠
Where VREF is equal to 1.24V.
Duty-Cycle
The MIC2295 is a general-purpose step up DC-DC
converter. The maximum difference between the input
voltage and the output voltage is limited by the maximum
duty-cycle (Dmax) of the converter. In the case of MIC2295,
DMAX = 85%. The actual duty cycle for a given application
can be calculated as follows:
V
D = 1− IN
VOUT
Open-Circuit Protection
For MLF package option of MIC2295, there is an output
over-voltage protection function that clamps the output to
below 34V in fault conditions. Possible fault conditions
may include: if the device is configured in a constant
current mode of operation and the load opens, or if in the
standard application the feedback resistors are
disconnected from the circuit. In these cases the FB pin
will pull to ground, causing the MIC2295 to switch with a
high duty-cycle. As a result, the output voltage will climb
out of regulation, causing the SW pin to exceed its
maximum voltage rating and possibly damaging the IC and
the external components. To ensure the highest level of
safety, the MIC2295 has a dedicated pin, OVP, to monitor
and clamp the output voltage in over-voltage conditions.
The OVP function is offered in the 2mm x 2mm MLF-8L
package option only. To disable OVP function, tie the
OVP pin to ground
The actual duty-cycle, D, cannot surpass the maximum
rated duty-cycle, Dmax.
Output Voltage Setting
The following equation can be used to select the feedback
resistors R1 and R2 (see figure 1).
⎡V
⎤
R1 = R 2 ⋅ ⎢ OUT − 1⎥
⎣ 1.24V ⎦
A high value of R2 can increase the whole system
efficiency, but the feedback pin input current (IFB) of the gm
operation amplifier will affect the output voltage. The R2
resistor value must be less than or equal to 5kΩ (R2 ≤ 5
kΩ).
Inductor Selection
In MIC2295, the switch current limit is 1.2A. The selected
inductor should handle at least 1.2A current without
saturating. The inductor should have a low DC resistor to
minimize power losses. The inductor’s value can be 4.7µH
to 10µH for most applications.
April 2005
10
M9999-042605
(408) 955-1690
Micrel
MIC2295
L1
4.7µH
VIN
3V to 4.2V
C1
4.7µF
6.3V
SW
OVP
EN
FB
GND
R2
1.87k
GND
L1
10µH
GND
C1
2.2µF
10V
FB
GND
R2
5k
GND
C1
2.2µF
10V
C2
4.7µF
16V
VIN
GND
R1
43.2k
FB
GND
GND
VIN
3V to 4.2V
C2
2.2µF
16V
C1
4.7µF
6.3V
GND
R1
43.2k
FB
GND
OVP
EN
VOUT
5V @ 400mA
D1
SW
VIN
470 pF
R1
5.62k
C2
4.7µF
16V
FB
R2
1.87k
L1
10µH
VIN
5V
R2
5k
C1
2.2µF
10V
C2
4.7µF
16V
GND
VOUT
[email protected]
D1
VIN
SW
R1
43.2k
OVP
EN
FB
GND
GND
GND
R2
5k
C2
2.2µF
25V
GND
5VIN to 24VOUT @ 80mA
3VIN to 5VIN to 12VOUT @ 300mA
April 2005
L1
4.7µH
MIC2295BML
OVP
EN
GND
3VIN - 4.2VIN to 5VOUT @ 400mA
VOUT
12V @300mA
D1
SW
R2
5k
GND
GND
MIC2295BML
VIN
FB
C2
4.7µF
16V
3VIN – 5VIN to 12VOUT @ 120mA
3VIN – 5VIN to 12VOUT @ 120mA
C1
2.2µF
10V
EN
GND
R2
5k
L1
10µH
OVP
MIC2295BML
OVP
VIN
3V to 5V
R1
43.2k
SW
VIN
GND
VOUT
12V @ 120mA
D1
SW
EN
GND
VOUT
12V @ 120mA
D1
GND
MIC2295BML
C1
2.2µF
10V
L1
10µH
VIN
3V to 5V
3VIN - 4.2Vin to 12VOUT @ 120mA
VIN
3V to 5V
R2
5k
MIC2295BML
OVP
L1
10µH
FB
C2
4.7µF
16V
3VIN - 4.2VIN to 9VOUT @ 180mA
R1
43.2k
SW
EN
EN
GND
MIC2295BML
VIN
OVP
GND
VOUT
12V @ 120mA
D1
R1
31.6k
SW
VIN
C1
2.2µF
10V
3.3VIN to 5VOUT @ 400mA
VIN
3V to 4.2V
VOUT
9V @ 180mA
D1
MIC2295BML
C2
10µF
16V
R1
5.62k
L1
10µH
VIN
3V to 4.2V
470 pF
MIC2295BML
VIN
VOUT
5V @ 400mA
D1
11
M9999-042605
(408) 955-1690
Micrel
MIC2295
Package Information
8-Pin Package MLF (ML)
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
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
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.
© 2004 Micrel, Incorporated.
April 2005
12
M9999-042605
(408) 955-1690