MIC2142
Micropower Boost Converter
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
October 2007
M9999-102507
General Description
The MIC2142 is a micropower boost switching regulator
housed in a SOT23-5 package. The input voltage range is
between 2.2V to 16V, making the device suitable for one-
cell Li Ion and 3 to 4-cell alkaline/NiCad/NiMH applica-
tions. The output voltage of the MIC2142 can be adjusted
up to 22V.
The MIC2142 is well suited for portable, space-sensitive
applications. It features a low quiescent current of 85µA,
and a typical shutdown current of 0.1µA. It’s 330kHz
operation allows small surface mount external components
to be used. The MIC2142 is capable of efficiencies over
85% in a small board area.
The MIC2142 can be configured to efficiently power a
variety of loads. It is capable of providing a few mA output
for supplying low power bias voltages; it is also capable of
providing the 80mA needed to drive 4 white LEDs.
The MIC2142 is available in a SOT23-5 package with an
ambient operating temperature range from –40°C to
+85°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• 2.2V to 16V input voltage
• Up to 22V output voltage
• 330kHz switching frequency
• 0.1µA shutdown current
• 85µA quiescent current
• Implements low-power boost, SEPIC, or flyback
• SOT23-5 package
Applications
• LCD bias supply
• White LED driver
• 12V Flash memory supply
• Local 3V to 5V conversion
___________________________________________________________________________________________________________
Typical Application
R2
365k
R1
124k
+5V @60mA
2.8V to 4.7V
V
IN
L1
33µH D1
MIC2142
5
3
4
2
1
VCC SW
FB
GNDEN
C
IN
10µF C
OUT
22µF
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0 10203040506070
)%(YCNEICIFFE
OUTPUT CURRENT (mA)
Efficienc
y
vs. Output Current
V
IN
= 4.2V
V
IN
= 3.0V
Typical Configuration Efficiency vs. Output Current
Micrel, Inc. MIC2142
October 2007
2 M9999-102507
Ordering Information
Part Number Marking*
Standard Pb-Free Standard Pb-Free
Voltage Ambient
Temperature Range Package
MIC2142BM5 MIC2142YM5 SBAA SBAA Adj. –40° to +85°C 5-Pin SOT23
* Under bar symbol (_) may not be to scale.
Pin Configur ation
5-Pin SOT23 (BM5) 5-Pin SOT23 (YM5)
Pin Description
Pin Number Pin Name Pin Function
1 VCC Chip Supply: +2.2V to +16V.
2 GND Ground: Return for internal circuitry and internal MOSFET (switch) source.
3 SW Switch Node (Input): Internal MOSFET drain; 22V maximum.
4 FB Feedback (Input): Output voltage sense node.
5 EN Shutdown: Device shuts down to 0.1µA typical supply current.
Micrel, Inc. MIC2142
October 2007
3 M9999-102507
Absolute Maximum Ratings(1)
Supply Voltage (V
CC
)......................................................18V
Switch Voltage (V
SW
)......................................................24V
Enable Pin Voltage (V
EN
)
(3)
.............................................18V
Feedback Voltage (V
FB
)
Adjustable Version.....................................................8V
Ambient Storage Temperature (T
s
)...........–65°C to +150°C
ESD Rating
(4)
Operating Ratings(2)
Supply Voltage (V
CC
)......................................... 2.2V to 16V
Enable Pin Voltage (V
EN
)
(3)
................................... 0V to 16V
Switch Voltage (V
SW
)......................................................22V
Ambient Temperature (T
A
) .......................... –40°C to +85°C
Junction Temperature Range (T
J
)............. –40°C to +125°C
Package Thermal Impedance
SOT23-5 (θ
JA
) ..................................................220°C/W
Electrical Characteristics
V
CC
= 3.6V; V
OUT
= 5V; I
OUT
= 200mA; T
A
= 25°C, bold values indicate –40°C< T
J
< +125°C, unless noted.
Parameter Condition Min Typ Max Units
Input Voltage 2.2 16 V
V
EN
= ON , V
FB
= 2.2V (adjustable) 85 125 µA
V
EN
= ON , V
OUT(NOMINAL)
+ 1V (MIC2142-5.0) 85 125 µA
Quiescent Current
V
EN
= OFF (shutdown) 0.1 2 µA
(±2%) 1.254 1.28 1.306 V Feedback Voltage (VFB)
(±3%) 1.241 1.312 V
Comparator Hysteresis 18 mV
adjustable 30 nA
Feedback Input Bias Current,
Note 5 fixed 20 µA
V
IH
(turn on) 0.6V
CC
0.55V
CC
V Enable Input Voltage
V
IL
(turn off) 1.1 0.8 V
Enable Input Current –1 0.01 1 µA
Load Regulation 200µA ≤ I
OUT
≤ 20mA 0.2 %V
OUT
2.2V ≤ V
CC
≤ 16V; I
OUT
= 4mA (adjustable) 0.25 %/V Line Regulation
2.2V ≤ V
CC
≤ 4.5V; I
OUT
= 4mA (MIC2142-5.0) 0.25 %/V
SW on Resistance I
SW
= 100mA, V
CC
= 2.5V 5 Ω
Switch Leakage Current V
EN
= OFF, V
SW
= 12V 0.05 1 µA
Oscillator Frequency 295 330 365 kHz
Duty Cycle 50 57 65 %
Notes:
1. 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, T
J(Max)
, the
junction-to-ambient thermal resistance, θ
JA
, and the ambient temperature, T
A
. The maximum allowable power dissipation will result in excessive die
temperature, and the regulator will go into thermal shutdown. The θ
JA
of the power SOT23-5 is 220°C/W mounted on a PC board.
2. The device is not guaranteed to function outside its operating rating.
3. V
EN
must be ≤ V
IN
.
4. Devices are ESD sensitive. Handling precautions recommended.
5. The maximum suggested value of the programming resistor, whose series resistance is measured from feedback to ground, is 124kΩ. Use of larger
resistor values can cause errors in the output voltage due to the feedback input bias current.
Micrel, Inc. MIC2142
October 2007
4 M9999-102507
Typical Characteristics
0
50
100
150
200
250
300
350
0 2 4 6 8 10121416
(TNERUCTNECSEIUQ µ)A
INPUT VOLTAGE (V)
Quiescent Current
vs. Input Voltage
V
OUT
= 5V
14
14.5
15
15.5
16
16.5
2468101214
)V(EGATLOVTUPTUO
INPUT VOLTAGE (V)
Line Regulation
I
L
= 2mA
L = 220µH
I
L
= 7mA
L = 22 H
0
200
400
600
800
1000
1200
02468101214
)Vm(ELPPIRTUPTUO
INPUT VOLTAGE (V)
Output Ripple
vs. Input Voltage
I
L
= 7mA
L = 22 H
V
OUT
= 15V I
L
= 2mA
L = 220µH
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25 30
)V(EGATLOVTUPTUO
OUTPUT CURRENT (mA)
MIC2142 Load
Regulation
V
REF
V
OUT
L = 22µH
V
IN
= 5V
0
50
100
150
200
250
300
350
02468101214
)zHk(YCNEUQERF
INPUT VOLTAGE (V)
Oscillator Characteristics
vs. Input Voltage
Duty Cycle
Frequency
0.40
0.45
0.50
0.55
0.60
0.65
ELCYCYTUD
V
O
= 15V
I
O
= 100µA
L= 220µH
70
72
74
76
78
80
82
84
-50 -30 -10 10 30 50 70 90 110
(TNERRUCTNECSEIUQ µ)A
TEMPERATURE (°C)
Quiescent Current
vs. Temperature
V
IN
= 3.6V
295
300
305
310
315
320
325
330
335
340
-50 -30 -10 10 30 50 70 90 110
)zHk(YCNEUQERF
TEMPERATURE (°C)
Frequency vs.
Temperature
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-50 -30 -10 10 30 50 70 90 110
SCITSIRETCARAHCROTALLICSO
TEMPERATURE (°C)
Timing Characteristics
Over Temperature
T (µsec)
t
ON
(µsec)
Duty Cycle
Micrel, Inc. MIC2142
October 2007
5 M9999-102507
Typical Characteristics (cont.)
0
1
2
3
4
5
6
7
-50 -30 -10 10 30 50 70 90 110
R
)NO(SD
(Ω)
TEMPERATURE (°C)
R
DS(ON)
vs.
Temperature
V
CC
=3.3V
V
CC
= 4.5V
0.4
0.42
0.44
0.46
0.48
0.5
0.52
0.54
0.56
0.58
0.6
-50 -30 -10 10 30 50 70 90 11
0
)%(ELCYCYTUD
TEMPERATURE (°C)
Timing Characteristics
Over Temperature
Micrel, Inc. MIC2142
October 2007
6 M9999-102507
Functional Diagram
FIXED DUTY CYCLE
FB
EN
VCC
1.265V
GND
SW
Oscillator
MIC2142
Bandgap
Reference
Shutdown
330kHz
Functional Description
This MIC2142 is a fixed duty cycle, constant frequency,
gated oscillator, micropower, switch-mode power supply
controller. Quiescent current for the MIC2142 is only
85µA in the switch off state, and since a MOSFET output
switch is used, additional switch drive current is
minimized. Efficiencies above 85% throughout most
operating conditions can be realized.
A functional block diagram is shown above and typical
schematic is shown on page 1. Regulation is performed
by a hysteretic comparator, which regulates the output
voltage by gating the internal oscillator. The internal
oscillator operates at a fixed 57% duty cycle and 330kHz
frequency. For the fixed output versions, the output is
divided down internally and then compared to the
internal V
REF
input. An external resistive divider is use for
the adjustable version.
The comparator has hysteresis built into it, which
determines the amount of low frequency ripple that will
be present on the output. Once the feedback input to the
comparator exceeds the control voltage by 18mV, the
high frequency oscillator drive is removed from the
output switch. As the feedback input to the comparator
returns to the reference voltage level, the comparator is
reset and the high frequency oscillator is again gated to
the output switch. The 18mV of hysteresis seen at the
comparator will be multiplied by the ratio of the output
voltage to the reference voltage. For a five volt output
this ratio would be 4, corresponding to a ripple voltage of
72mV at the output.
The maximum output voltage is limited by the voltage
capability of the output switch. Output voltages up to 22V
can be achieved with a standard boost circuit. Higher
output voltages can be realized with a flyback
configuration.
Micrel, Inc. MIC2142
October 2007
7 M9999-102507
Application Information
Pre-designed circuit information is at the end of this
section.
Component Selection
Resistive Divider (Adjustable Version)
The external resistive divider should divide the output
volt-age down to the nominal reference voltage. Current
drawn through this resistor string should be limited in
order to limit the effect on the overall efficiency. The
maximum value of the resistor string is limited by the
feedback input bias current and the potential for noise
being coupled into the feedback pin. A resistor string on
the order of 2MΩ limits the additional load on the output
to 20µA for a 20V output. In addition, the feedback input
bias current error would add a nominal 60mV error to the
expected output. Equation 1 can be used for determining
the values for R2 and R1.
(1)
REFOUT
V
R1
R2R1
V⎟
⎠
⎞
⎜
⎝
⎛+
=
Boost Inductor
Maximum power is delivered to the load when the
oscillator is gated on 100% of the time. Total output
power and circuit efficiency must be considered when
determining the maximum inductor value. The largest
inductor possible is preferable in order to minimize the
peak current and output ripple. Efficiency can vary from
80% to 90% depending upon input voltage, output
voltage, load current, inductor, and output diode.
Equation 2 solves for the output current capability for a
given inductor value and expected efficiency. Figures 7
through 12 show estimates for maximum output current
assuming the minimum duty and maximum frequency
and 80% efficiency. To determine the necessary
inductance; find the intersection between the output
voltage and current, and then select the value of the
inductor curve just above the intersection. If the
efficiency is expected to be different than the 85% used
for the graph, Equation 2 can then be used to better
determine the maximum output capability.
The peak inductor/switch current can be calculated from
Equation 3 or read from the graph in Figure 13. The
peak current shown in the graph in Figure 13 is derived
assuming a max duty cycle and a minimum frequency.
The selected inductor and diode peak current capability
must be greater than this. The peak current seen by the
inductor is calculated at the maximum input voltage. A
wide ranging input voltage will result in a higher worst
case peak current in the inductor than a narrow input
range.
(2)
IN(min)
O
SMAX
2
ONIN(min)
O(max)
V
eff
V
1
T2L
)t(V
I
−
×=
(3)
MIN
IN(max)ON(max)
PK L
Vt
I=
Table 1 lists common inductors suitable for most
applications. Due to the internal transistor peak current
limitation at low input voltages, inductor values less than
10µH are not recommended. Table 6 lists minimum
inductor sizes versus input and output voltage. In low-
cost, low-peak-current applications, RF-type leaded
inductors may sufficient. All inductors listed in Table 5
can be found within the selection of CR32- or LQH4C-
series inductors from either Sumida or MuRata.
Manufacturer Series Device Type
MuRata LC4/C3/C1HQ surface mount
Sumida CR32 surface mount
J.W. Miller 78F axial leaded
Coilcraft 90 axial leaded
Table 1. Inductor Exampl es
Boost Output Diode
Speed, forward voltage, and reverse current are very
important in selecting the output diode. In the boost
configuration the average diode current is the same as
the average load current and the peak is the same as
the inductor and switch current. The peak current is the
same as the peak inductor current and can be derived
from Equation 3 or the graph in Figure 13. Care must be
taken to make sure that the peak current is evaluated at
the maximum input voltage.
The BAT54 and BAT85 series are low current Shottky
diodes available from “On Semiconductor” and “Phillips”
respectively. They are suitable for peak repetitive
currents of 300mA or less with good reverse current
characteristics. For applications that are cost driven, the
1N4148 or equivalent will provide sufficient switching
speed with greater forward drop and reduced cost. Other
acceptable diodes are On Semiconductor’s MBR0530 or
Vishay’s B0530, although they can have reverse
currents that exceed 1 mA at very high junction
temperatures. Table 2 summarizes some typical
performance characteristics of various suitable diodes.
Micrel, Inc. MIC2142
October 2007
8 M9999-102507
Diode
75°C
V
FWD
at
100mA
25°C
V
FWD
at
100mA
Room
Temp.
Leakage
at 15V
75°C
Leakage
at 15V Package
MBR0530 0.275V 0.325V 2.5µA 90µA SOD123
SMT
1N4148 0.6V
(175°C) 0.95V 25nA
(20V)
0.2µA
(20V)
leaded
and SMT
BAT54 0.4V
(85°C) 0.45V 10nA
(25V)
1µA
(20V) SMT
BAT85 0.54V
(85°C) 0.56V 0.4µA 2µA
(85°C)
DO-34
leaded
Table 2. Diode Examples
Output Capacitor
Due to the limited availability of tantalum capacitors,
ceramic capacitors and inexpensive electrolyics may be
preferred. Selection of the capacitor value will depend
upon the peak inductor current and inductor size.
MuRata offers the GRM series with up to 10µF @ 25V
with a Y5V temperature coefficient in a 1210 surface
mount package. Low cost applications can use the M-
series leaded electrolytic capacitor from Panasonic. In
general, ceramic, electrolytic, or tantalum values ranging
from 1µF to 22µF can be used for the output capacitor.
Manufacturer Series Type Package
MuRata GRM ceramic Y5V surface mount
Vishay 594 tantalum surface mount
Panasonic M-series Electrolytic leaded
Table 3. Capacitor Example s
Design Example
Given a design requirement of 12V output and 1mA load
with a minimum input voltage of 2.5V, Equation 2 can be
used to calculate to maximum inductance or it can be
read from the graph in Figure 7. Once the maximum
inductance has been determined the peak current can
be determined using Equation 3 or the graph in Figure
13.
V
OUT
= 12V
I
OUT
= 5mA
V
IN
= 2.5V to 4.7V
F
max
= 360kHz
η = 0.8 = efficiency
D
nom
= 0.55
sec2.78
360kHz
1
F
1
T
max
S(min)
µ
===
sec53.1
360kHz
0.55
f
D
t
max
nom
ON(min)
µ
===
IN(min)
O
S(min)O(max)
ON(min)IN(min)
max
V
η
V
1
T2I
tV
L
22
−
×
××
×
=
H42
2.5
0.8
12
1
sec2.7825mA
sec1.532.5
L
22
max
µ
µ
µ
=
−
×
××
×
=
Select 39µH ±10%.
sec2
300kHz
0.551.1
F
D1.1
t
min
nom
ON(max)
µ
=
×
=
×
=
270mA
H35
4.7Vsec2.0
L
Vt
I
min
IN(max)ON(max)
peak
=
×
=
×
=
µ
µ
Bootstrap Configuration
For input voltages below 4.5V the bootstrap
configuration can increase the output power capability of
the MIC2142. Figure 2 shows the bootstrap configuration
where the output voltage is used to bias the MIC2142.
This improves the power capability of the MIC2142 by
increasing the gate drive volt-age hence the peak
current capability of the internal switch. This allows the
use of a smaller inductor which increases the output
power capability. Table 4 also summarizes the various
configurations and power capabilities using the
booststrap configuration. This bootstrap configuration is
limited to output voltage of 16V or less.
Figure 1 shows how a resistor (R3) can be added to
reduce the ripple seen at the V
CC
pin when in the
bootstrap configuration. Reducing the ripple at the V
CC
pin can improve output ripple in some applications.
R2
36.5k
R1
12.4k
C1
22µF
+5V @80mA
GNDGND
+3.0V to +4.2V
V
IN
L1
33µH CR1
MBR0530
U1 MIC2142
5
3
2
1
4
FB SW
GND
VCCEN
C2
10µF
C3
270pF
C4
1F
R3
100
Figure 1. Bootstrap V
CC
with V
CC
Low Pass Filter
Micrel, Inc. MIC2142
October 2007
9
M9999-102507
R2
36.5k
R1
12.4k
C1
22µF
+5V @16mA
GNDGND
V
IN
L1
47µH CR1
MBR0530
U1 MIC2142
5
3
2
1
4
FB SW
GND
VCCEN
C2
10µF
C3
270pF
Figure 2. Bootstrap Conf igu ration
For additional pre-designed circuits, see Table 4.
Rprogram
82
CR6
LWT673
C1
1µF
25V
CR7
LWT673
CR5
LWT673
C2
10µF
+15V @15mA
GNDGND
PWM
L1
10µH CR1
MBR0530
U1 MIC2142
5
3
2
1
4
FB SW
GND
VCCEN
(from controller)
V
IN
Figure 3. Series White LED Driver with PWM Dimming Con trol
Rprogram
82
CR6
LWT673
C1
1µF
25V
CR7
LWT673
CR5
LWT673
C2
10µF
+15V @15mA
GNDGND
DAC
SHTDWN
L1
10µH CR1
MBR0530
R4 R3
U1 MIC2142
5
3
2
1
4
FB SW
GND
VCCEN
V
IN
Figure 4. Series White LED Driver with Analog Dimming Control
Micrel, Inc. MIC2142
October 2007
10
M9999-102507
Figure 5. Parallel White LED Driver with Analog Dimming Control
R2
1.8M
R1
120k
C1
1µF
25V
+20V @0.5mA
GND
V
INRTN
L1
10µH CR1
BAT54HT1
U1 MIC2142
5
3
2
1
4
FB SW
GND
VCCEN
C1
1µF
25V
C2
10µF
V
IN
Figure 6. Handheld LCD Supply
Micrel, Inc. MIC2142
October 2007
11
M9999-102507
V
IN(min)
V
IN(max)
V
OUT
I
OUT(max)
L1 I
PK
@ V
IN(max)
CR1
2.5V 3.0V 3.3V 40mA
23mA
10mA
47µH
85µH
180µH
129mA
74mA
34VmA
BAT54
BAT54
BAT54
2.5V 4.5V 5V
boot strapped
boot strapped
16.5mA
7.8mA
51
77
47µH
100µH
15
10
193mA
91mA
605
908
BAT54
BAT54
MBR0530
MBR
2.5 11.5
4.7
12
boot strapped
boot strapped
1.8
2.25
15
22
47
100
15
10
493
232
632
950
MBR
BAT
MBR
MBR
2.5 14.5
4.7
15
boot strapped
boot strapped
3.7
1.7
17.4
8
47
100
10
22
622
292
950
430
MBR
BAT
MBR
MBR
2.5
2.5
4.7
4.7
20
20
2.7
1.5
47
82
202
110
BAT
BAT
3.0 4.7 5
boot strapped
boot strapped
40
70
100
33
18
12
287
525
800
BAT
MBR
MBR
3.0 8.5
4.7
4.7
9
boot strapped
boot strapped
15
28
40
33
18
12
520
525
800
MBR
MBR
MBR
3.0
3.0
3.0
14.5
4.7
4.7
15
boot strapped
boot strapped
7.8
14
21
33
18
12
886
525
800
MBR
MBR
MBR
3.0 4.7 20 5.6 33 287 BAT
5.0 8.5 9 70
23
10
27
82
180
635
209
95
MBR
BAT
BAT
5.0 11.5 12 43
14
6
27
82
180
860
283
129
MBR
BAT
BAT
5.0 14.5
9
15 30
10
30
27
82
27
1083
357
672
MBR
MBR
MBR
5.0 8.0 20 8 68 237 BAT
9 11.5 12 118
66
30
56
100
220
414
232
105
MBR
BAT
BAT
9 14 15 70
40
18
56
100
220
504
282
128
MBR
BAT
BAT
9 14 20 20
10
6
120
220
390
235
128
72
BAT
BAT
BAT
12 14 15 156
71
27
68
150
390
415
182
72
MBR
BAT
BAT
12 14 20 35 150 188 BAT
Table 4. Typical Maximum Power Configuration
Micrel, Inc. MIC2142
October 2007
12
M9999-102507
V
IN
V
OUT
I
OUT
L1 CR1 I
PEAK
Configuration
3.3V±5% 5V
9V
12V
15
20
70mA
30mA
20mA
15mA
6mA
18µH
18µH
18µH
18µH
33µH
MBR0530
MBR0530
MBR0530
MBR0530
BAT54
400
400
400
400
214
Bootstrap
Bootstrap
Bootstrap
Bootstrap
5V±5% 9V
12V
15V
20
70mA
40mA
30mA
8mA
27µH
27µH
27µH
68µH
MBR0530
MBR0530
MBR0530
BAT54
370
370
370
148
12V±5% 15V
20V
158
35
68
150
MBR0530
BAT54
350
160
15V±5% 20V 50 220 BAT54 1140
Table 5. Typical Maximum Power Configurations for Regulated Inp uts
V
OUT
= 16V to 22V V
OUT
< 16V (bootstapped) V
OUT
< 16V (bootstapped)
85°C 85°C 40°C
V
IN
(V) L
MIN
(µH) L
MIN
(µH) L
MIN
(µH)
2.5 47 47 (15) 47 (10)
3 33 33 (18) 33 (12)
3.5 47 27 (22) 27 (15)
4 56 27 (22) 22 (18)
5 68 27 22
6 82 33 22
7 100 39 27
8 100 47 33
9 120 56 33
10 150 56 39
11 150 68 47
12 150 68 47
13 180 82 56
14 180 82 56
15 220 82 56
16 220 100 68
Table 6. Minimum Inductance
Manufacturer Web Address
MuRata www.murata.com
Sumida www.sumida.com
Coilcraft www.coilcraft.com
J.W. Miller www.jwmiller.com
Micrel www.micre.com
Vishay www.vishay.com
Panasonic www.panasonic.com
Table 7. Component Supplier Websites
Micrel, Inc. MIC2142
October 2007
13
M9999-102507
Inductor Selection Guides
Figure 7. Inductor Selection fo r V
IN
= 2.5V Figure 8. Inductor Selection fo r V
IN
= 3.0V
Micrel, Inc. MIC2142
October 2007
14
M9999-102507
Figure 9. Inductor Selection fo r V
IN
= 5V Figure 10. Inducto r Selectio n for V
IN
= 9V
Micrel, Inc. MIC2142
October 2007
15
M9999-102507
IN
Figure 11. Inducto r Selectio n for V
IN
= 12V Figure 8. Inductor Selection fo r V
IN
= 15V
Micrel, Inc. MIC2142
October 2007
16
M9999-102507
Figure 13. Peak Inductor Current vs. Input Voltage
Micrel, Inc. MIC2142
October 2007
17
M9999-102507
Package Information
5-Pin SOT23 (M5)
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.
© 2000 Micrel, Incorporated.
