MICREL MIC5236

MIC5236
Micrel
MIC5236
Low Quiescent Current µCap LDO Regulator
Preliminary Information
General Description
Features
The MIC5236 is a low quiescent current, µCap low-dropout
regulator. With a maximum operating input voltage of 30V
and a quiescent current of 20µA, it is ideal for supplying keepalive power in systems with high-voltage batteries.
Capable of 150mA output, the MIC5236 has a dropout
voltage of only 300mV. It can also survive an input transient
of –20V to +60V.
As a µCap LDO, the MIC5236 is stable with either a ceramic
or a tantalum output capacitor. It only requires a 1.0µF output
capacitor for stability.
The MIC5236 includes a logic compatible enable input and an
undervoltage error flag indicator. Other features of the
MIC5236 include thermal shutdown, current-limit, overvoltage shutdown, load-dump protection, reverse leakage protections, and reverse battery protection.
Available in the thermally enhanced SOP-8 and MSOP-8, the
MIC5236 comes in fixed 2.5V, 3.0V, 3.3V, 5.0V, and adjustable voltages. For other output voltages, contact Micrel.
• Ultra-low quiescent current (IQ = 20µA @IO = 100µA)
• Wide input range: 2.3V to 30V
• Low dropout:
230mV @50mA;
300mV @150mA
• Fixed 2.5V, 3.0V, 3.3V, 5.0V, and Adjustable outputs
• ±1.0% initial output accuracy
• Stable with ceramic or tantalum output capacitor
• Load dump protection: –20V to +60V input transient
survivability
• Logic compatible enable input
• Low output flag indicator
• Overcurrent protection
• Thermal shutdown
• Reverse-leakage protection
• Reverse-battery protection
• High-power SOP-8 and MSOP-8
Applications
• Keep-alive supply in notebook and
portable personal computers
• Logic supply from high-voltage batteries
• Automotive electronics
• Battery-powered systems
Typical Application
MIC5236
OUT
VIN
30V
VOUT
3.0V/100µA
IN
EN
VIN
5V
IGND = 20µA
ERR
MIC5236
OUT
IN
47k
EN
GND
ERR
GND
Regulator with Low IO and Low IQ
VIN
5V
COUT
VERR
Regulator with Error Output
MIC5236
IN
OUT
EN
VOUT
3.0V/150mA
VOUT
3.0V/150mA
ADJ
GND
Regulator with Adjustable Output
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
November 2000
1
MIC5236
MIC5236
Micrel
Ordering Information
Part Number *
Voltage
Junction Temp. Range
Package
MIC5236-5.0BM
5.0V
–40°C to +125°C
8-lead SOIC
MIC5236-5.0BMM
5.0V
–40°C to +125°C
8-lead MSOP
MIC5236-3.3BM
3.3V
–40°C to +125°C
8-lead SOIC
MIC5236-3.3BMM
3.3V
–40°C to +125°C
8-lead MSOP
MIC5236-3.0BM
3.0V
–40°C to +125°C
8-lead SOIC
MIC5236-3.0BMM
3.0V
–40°C to +125°C
8-lead MSOP
MIC5236-2.5BM
2.5V
–40°C to +125°C
8-lead SOIC
MIC5236-2.5BMM
2.5V
–40°C to +125°C
8-lead MSOP
MIC5236BM
ADJ
–40°C to +125°C
8-lead SOIC
MIC5236BMM
ADJ
–40°C to +125°C
8-lead MSOP
*Conta5ct factory regarding availablity for voltages not listed
Pin Configuration
ERR 1
8 GND
ADJ 1
8 GND
IN 2
7 GND
IN 2
7 GND
OUT 3
6 GND
OUT 3
6 GND
EN 4
5 GND
EN 4
5 GND
8-Pin SOIC (M)
8-Pin MSOP (MM)
8-Pin SOIC (M)
8-Pin MSOP (MM)
Pin Description
Pin Number
Pin Number
Pin Name
1
/ERR
Error (Output): Open-collector output is active low when the output is out of
regulation due to insufficient input voltage or excessive load. An external
pull-up resistor is required.
ADJ
Adjustable Feedback Input. Connect to voltage divider network.
1
2
2
IN
3
3
OUT
4
4
EN
5–8
5–8
GND
MIC5236
Pin Function
Power supply input.
Regulated Output
Enable (Input): Logic low = shutdown; logic high = enabled.
Ground: Pins 5, 6, 7, and 8 are internally connected in common via the
leadframe.
2
November 2000
MIC5236
Micrel
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Supply Voltage (VIN), Note 3 ........................ –20V to +60V
Power Dissipation (PD), Note 4 ............... Internally Limited
Junction Temperature (TJ) ...................................... +150°C
Storage Temperature (TS) ....................... –65°C to +150°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
ESD Rating, Note 5
Supply Voltage (VIN) ................................... + 2.3V to +30V
Junction Temperature (TJ) ....................... –40°C to +125°C
Package Thermal Resistance
MSOP (θJA) ......................................................... 80°C/W
SOIC (θJA) ........................................................... 63°C/W
Electrical Characteristics
VIN = 6.0V; VEN = 2.0V; COUT = 4.7µF, IOUT = 100µA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.
Symbol
Parameter
Conditions
VOUT
Output Voltage Accuracy
variation from nominal VOUT
∆VOUT/∆T
Output Voltage
Temperature Coefficient
Note 6
50
∆VOUT/VOUT
Line Regulation
VIN = VOUT + 1V to 30V
0.2
0.5
1.0
%
%
∆VOUT/VOUT
Load Regulation
IOUT = 100µA to 50mA, Note 7
0.15
0.3
0.5
%
%
IOUT = 100µA to 150mA, Note 7
0.3
0.6
1.0
%
%
IOUT = 100µA
50
100
mV
IOUT = 50mA
230
400
mV
IOUT = 100mA
270
IOUT = 150mA
300
500
mV
VEN ≥ 2.0V, IOUT = 100µA
20
30
µA
VEN ≥ 2.0V, IOUT = 50mA
0.5
0.8
mA
VEN ≥ 2.0V, IOUT = 100mA
1.5
VEN ≥ 2.0V, IOUT = 150mA
2.8
4.0
5.0
mA
mA
∆V
IGND
Dropout Voltage, Note 8
Ground Pin Current
Min
Typ
–1
–2
Max
Units
1
+2
%
%
ppm/°C
mV
mA
IGND(SHDN)
Ground Pin in Shutdown
VEN ≤ 0.6V, VIN = 30V
0.1
1
µA
ISC
Short Circuit Current
VOUT = 0V
260
350
mA
en
Output Noise
10Hz to 100kHz, VOUT = 3.0V, CL = 1.0µF
160
µVrms
Low Threshold
% of VOUT
94
%
High Threshold
% of VOUT
95
98
%
VOL
/ERR Output Low Voltage
VIN = VOUT(nom) – 0.12VOUT, IOL = 200µA
150
250
400
mV
mV
ILEAK
/ERR Output Leakage
VOH = 30V
0.1
1
2
µA
µA
VIL
Input Low Voltage
regulator off
0.6
V
VIH
Input High Voltage
regulator on
/ERR Output
V/ERR
90
Enable Input
November 2000
2.0
3
V
MIC5236
MIC5236
Micrel
Symbol
Parameter
Conditions
IIN
Enable Input Current
Min
Typ
Max
Units
VEN = 0.6V, regulator off
0.01
1.0
2.0
µA
µA
VEN = 2.0V, regulator on
0.15
1.0
2.0
µA
µA
VEN = 30V, regulator on
0.5
2.5
5.0
µA
µA
Note 1.
Exceeding the absolute maximum rating may damage the device.
Note 2.
The device is not guaranteed to function outside its operating rating.
Note 3:
The absolute maximum positive supply voltage (60V) must be of limited duration (≤100ms) and duty cycle (≤1%). The maximum continuous
supply voltage is 30V.
Note 4:
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 termperature, and the regulator will go into thermal shutdown. The θJA of the
MIC5236-x.xBM (all versions) is 63°C/W, and the MIC5236-x.xBMM (all versions) is 80°C/W, mounted on a PC board (see “Thermal Characteristics” for further details).
Note 5.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 6:
Output voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range.
Note 7:
Regulation is measured at constant junction temperature using pulse testing with a low duty-cycle. Changes in output voltage due to heating
effects are covered by the specification for thermal regulation.
Note 8:
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1.0V
differential.
MIC5236
4
November 2000
MIC5236
Micrel
Typical Characteristics
Dropout Voltage
vs. Output Current
300
200
2.5
2.0
ILOAD = 150mA
1.5
MIC5236-3.0
0
40
80
120
160
1.0
1.5
200
OUTPUT CURRENT (mA)
Ground Current
vs. Output Current
2.0
2.5
3.0
3.5
VIN = 4V
2
1
VIN = 10V
200
100
MIC5236-3.0
0
-40 -20 0 20 40 60 80 100 120
4.0
TEMPERATURE (°C)
Ground Pin Current
vs. Output Current
Ground Current
vs. Supply Voltage
5
MIC5236-3.0
0
100
200
300
400
GROUND CURRENT (mA)
ILOAD = 10mA
50
40
1mA 100µA
30
20
10µA
1
2
3
4
5
6
7
VIN = 4V
0.06
ILOAD = 10mA
0.04
0.02
MIC5236-3.0
0
-40 -20 0
8
Ground Current
vs. Temperature
VIN = 4V
ILOAD = 150mA
1
MIC5236-3.0
20 40 60 80 100 120
VOLTAGE OUTPUT (V)
3
1
2
3
4
5
6
7
8
Ground Current
vs. Temperature
1.0
0.8
VIN = 4V
0.6
3.010
3.005
VIN = 4V
ILOAD = 150mA
3.000
2.995
2.990
2.985
-40 -20 0
20 40 60 80 100 120
TEMPERATURE (°C)
5
ILOAD = 75mA
0.4
0.2
MIC5236-3.0
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Short Circuit Current
vs. Temperature
Output Voltage
vs. Temperature
MIC5236-3.0
November 2000
0
SUPPLY VOLTAGE (V)
20 40 60 80 100 120
3.015
TEMPERATURE (°C)
ILOAD = 100µA
TEMPERATURE (°C)
4
0
-40 -20 0
1
1.2
0.08
SUPPLY VOLTAGE (V)
2
VOUT = 3V
2
Ground Current
vs. Temperature
MIC5236-3.0
70
60
ILOAD = 150mA
3
0
500
0.10
90
80
MIC5236-3.0
4
OUTPUT CURRENT (µA)
100
10
0
0
VIN = 10V
10
0
20 40 60 80 100 120 140 160
5
VIN = 4V
GROUND CURRENT (mA)
0
ILOAD = 150mA
300
SUPPLY VOLTAGE (V)
15
Ground Current
vs. Supply Voltage
GROUND PIN CURRENT (µA)
MIC5236-3.0
400
GROUND CURRENT (mA)
3
20
OUTPUT CURRENT (mA)
GROUND CURRENT (mA)
ILOAD = 100mA
500
25
MIC5236-3.0
GROUND PIN CURRENT (µA)
GROUND PIN CURRENT (mA)
4
0
ILOAD = 50mA
SHORT CIRCUIT CURRENT (mA)
0
VOUT = 98% of Nominal VOUT
3.0
600
ILOAD = 10mA
DROPOUT VOLTAGE (mV)
OUTPUT VOLTAGE (V)
DROPOUT VOLTAGE (mV)
400
100
Dropout Voltage
vs. Temperature
Dropout Characteristics
3.5
285
280
275
270
VOUT = 0V
265
260
MIC5236-3.0
255
-40 -20 0
20 40 60 80 100 120
TEMPERATURE (°C)
MIC5236
MIC5236
Micrel
41
3.018
MIC5236-3.0
3.014
3.012
3.010
ILOAD = 10mA
3.008
3.5
MIC5236-3.0
3.006
OUTPUT VOLTAGE (V)
3.016
40
INPUT VOLTAGE (V)
39
38
37
3.004
3.002
5
10
15
20
25
30
36
-40 -20 0
35
INPUT VOLTAGE (V)
3.0
OUTPUT-LOW VOLTAGE (V)
120
INPUT CURRENT (mA)
MIC5236-3.0
100
VEN = 5V
80 R = 30Ω
L
60
40
20
0
-30
2.0
1.5
1.0
0.5
-20
-10
0
INPUT VOLTAGE (V)
2.0
1.5
Dropout Induced
Error Flag
1.25
VIN = 2.7V
VOUT =2.62V
No Load
1.0
0.5
0
0
10
0.5
1.0
1.5
SINK CURRENT (mA)
100
200
300
400
2.0
1.00
Current Limit Induced
Error Flag
VIN = 6V
VOUT = 2.03V
RL = 6Ω
0.75
0.50
0.25
MIC5236-3.0
0
0
0.5 1.0 1.5 2.0 2.5
SINK CURRENT (mA)
3.0
Reverse Current
(Grounded Input)
70
40
30
+25°C
20
10
+85°C
5
10
15
20
EXTERNAL VOLTAGE (V)
REVERSE CURRENT (µA)
Note 10
-40°C
0
0
0
CURRENT LIMIT (mA)
2.5
60
50
0
20 40 60 80 100 120
MIC5236-3.0
Reverse Current
(Open Input)
REVERSE CURRENT (µA)
2.5
TEMPERATURE (°C)
Input Current
60
Note 11
50
-40°C
40
+25°C
30
20
10
0
0
+85°C
5
10
15
20
EXTERNAL VOLTAGE (V)
Note 10
MIC5236
IN
OUT
EN GND
MIC5236
3.0
MIC5236-3.0
0
OUTPUT-LOW VOLTAGE (V)
VOLTAGE OUTPUT (V)
Current Limit
vs. Output Voltage
Overvoltage Threshold
vs. Temperature
Line Regulation
Note 11
Reverse
Current
MIC5236
IN
OUT
Reverse
Current
EN GND
6
November 2000
MIC5236
Micrel
Functional Characteristics
Load
Transient Response
VIN = 5V
IL = 10mA
TIME (250µs/div.)
November 2000
VIN = 4V
VOUT = 3V
COUT = 15µF
ESR = 200mΩ
IOUT
(100mA/div.)
VEN
(5V/div.)
VOUT
(100mV/div.)
VOUT
(2V/div.)
Enable
Transient Response
TIME (250µs/div.)
7
MIC5236
MIC5236
Micrel
Functional Diagram
IN
OUT
EN
RFB1
RFB2
Error
Amplifier
RFB3
ERR
VREF
1.23V
Error
Comparator
MIC5236-x.x
GND
MIC5236
8
November 2000
MIC5236
Micrel
Error Detection Comparator Output
The ERR pin is an open collector output which goes low when
the output voltage drops 5% below it’s internally programmed
level. It senses conditions such as excessive load (current
limit), low input voltage, and over temperature conditions.
Once the part is disabled via the enable input, the error flag
output is not valid. Overvoltage conditions are not reflected in
the error flag output. The error flag output is also not valid for
input voltages less than 1.3V.
The error output has a low voltage of 400mV at a current of
200µA. In order to minimize the drain on the source used for
the pull-up, a value of 200k to 1MΩ is suggested for the error
flag pull-up. This will guarantee a maximum low voltage of
0.4V for a 30V pull-up potential. An unused error flag can be
left unconnected.
Application Information
The MIC5236 provides all of the advantages of the MIC2950:
wide input voltage range, load dump (positive transients up to
60V), and reversed-battery protection, with the added advantages of reduced quiescent current and smaller package.
Additionally, when disabled, quiescent current is reduced to
0.1µA.
Enable
A low on the enable pin disables the part, forcing the quiescent current to less than 0.1µA. Thermal shutdown and the
error flag are not functional while the device is disabled. The
maximum enable bias current is 2µA for a 2.0V input. An open
collector pull-up resistor tied to the input voltage should be set
low enough to maintain 2V on the enable input. Figure 1
shows an open collector output driving the enable pin through
a 200k pull-up resistor tied to the input voltage.
In order to avoid output oscillations, slow transitions from low
to high should be avoided.
200k
VIN
5V
4.75V
Output
Voltage
VALID ERROR
Error
Output
VERR
MIC5236
IN
OUT
NOT
VALID
NOT
VALID
VOUT
200k
EN
0V
ERR
GND
Input
Voltage
COUT
SHUTDOWN
ENABLE
5V
1.3V
0V
Figure 3. Error Output Timing
Reverse Current Protection
The MIC5236 is designed to limit the reverse current flow
from output to input in the event that the MIC5236 output has
been tied to the output of another power supply. See the
graphs detailing the reverse current flow with the input
grounded and open.
Thermal Shutdown
The MIC5236 has integrated thermal protection. This feature
is only for protection purposes. The device should never be
intentionally operated near this temperature as this may have
detrimental effects on the life of the device. The thermal
shutdown may become inactive while the enable input is
transitioning a high to a low. When disabling the device via the
enable pin, transition from a high to low quickly. This will
insure that the output remains disabled in the event of a
thermal shutdown.
Current Limit
Figure 4 displays a method for reducing the steady state
short circuit current. The duration that the supply delivers
current is set by the time required for the error flag output to
discharge the 4.7µF capacitor tied to the enable pin. The off
time is set by the 200K resistor as it recharges the 4.7µF
capacitor, enabling the regulator. This circuit reduces the
short circuit current from 280mA to 15mA while allowing for
regulator restart once the short is removed.
Figure 1. Remote Enable
OUTPUT CAPACITOR ESR (Ω)
Input Capacitor
An input capacitor may be required when the device is not
near the source power supply or when supplied by a battery.
Small, surface mount, ceramic capacitors can be used for
bypassing. Larger values may be required if the source
supply has high ripple.
Output Capacitor
The MIC5236 has been designed to minimize the effect of the
output capacitor ESR on the closed loop stability. As a result,
ceramic or film capacitors can be used at the output. Figure 2
displays a range of ESR values for a 10µF capacitor. Virtually
any 10µF capacitor with an ESR less than 3.4Ω is sufficient
for stability over the entire input voltage range. Stability can
also be maintained throughout the specified load and line
conditions with 1µF film or ceramic capacitors.
5
4
3
Stable Region
2
1
0
TJ = 25°C
VOUT = 10µF
5
10
15
20
25
30
INPUT VOLTAGE (V)
Figure 2. Output Capacitor ESR
November 2000
9
MIC5236
MIC5236
Micrel
through 8 can now be soldered directly to a ground plane
which significantly reduces the case-to-sink thermal resistance and sink to ambient thermal resistance.
Low-dropout linear regulators from Micrel are rated to a
maximum junction temperature of 125°C. It is important not
to exceed this maximum junction temperature during operation of the device. To prevent this maximum junction temperature from being exceeded, the appropriate ground plane heat
sink must be used.
1N4148
VOUT
200k
EN
SHUTDOWN
ENABLE
ERR
GND
COUT
4.7µF
Figure 4. Remote Enable with Short-Circuit
Current Foldback
900
COPPER AREA (mm2)
800
Thermal Characteristics
The MIC5236 is a high input voltage device, intended to
provide 150mA of continuous output current in two very small
profile packages. The power SOP-8 and power MSOP-8
allow the device to dissipate about 50% more power than
their standard equivalents.
400
300
200
0.25 0.50 0.75 1.00 1.25 1.50
POWER DISSIPATION (W)
Figure 6. Copper Area vs. Power-SOP
Power Dissipation (∆TJA)
Figure 6 shows copper area versus power dissipation with
each trace corresponding to a different temperature rise
above ambient.
From these curves, the minimum area of copper necessary
for the part to operate safely can be determined. The maximum allowable temperature rise must be calculated to determine operation along which curve.
∆T = TJ(max) – TA(max)
TJ(max) = 125°C
TA(max) = maximum ambient operating temperature
For example, the maximum ambient temperature is 50°C, the
∆T is determined as follows:
∆T = 125°C – 50°C
∆T = 75°C
Using Figure 6, the minimum amount of required copper can
be determined based on the required power dissipation.
Power dissipation in a linear regulator is calculated as follows:
PD = (VIN – VOUT) IOUT + VIN · IGND
If we use a 3V output device and a 28V input at moderate
output current of 25mA, then our power dissipation is as
follows:
PD = (28V – 3V) × 25mA + 28V × 250µA
PD = 625mW + 7mW
PD = 632mW
From Figure 6, the minimum amount of copper required to
operate this application at a ∆T of 75°C is 25mm2.
Quick Method
Determine the power dissipation requirements for the design
along with the maximum ambient temperature at which the
device will be operated. Refer to Figure 7, which shows safe
operating curves for three different ambient temperatures:
25°C, 50°C and 85°C. From these curves, the minimum
SOP-8
θJA
ground plane
heat sink area
AMBIENT
printed circuit board
Figure 5. Thermal Resistance
Using the power SOP-8 reduces the θJC dramatically and
allows the user to reduce θCA. The total thermal resistance,
θJA (junction-to-ambient thermal resistance) is the limiting
factor in calculating the maximum power dissipation capability of the device. Typically, the power SOP-8 has a θJC of
20°C/W, this is significantly lower than the standard SOP-8
which is typically 75°C/W. θCA is reduced because pins 5
MIC5236
500
0
0
One of the secrets of the MIC5236’s performance is its power
SO-8 package featuring half the thermal resistance of a
standard SO-8 package. Lower thermal resistance means
more output current or higher input voltage for a given
package size.
Lower thermal resistance is achieved by joining the four
ground leads with the die attach paddle to create a singlepiece electrical and thermal conductor. This concept has
been used by MOSFET manufacturers for years, proving
very reliable and cost effective for the user.
Thermal resistance consists of two main elements, θJC
(junction-to-case thermal resistance) and θCA (case-to-ambient thermal resistance). See Figure 5. θJC is the resistance
from the die to the leads of the package. θCA is the resistance
from the leads to the ambient air and it includes θCS (case-tosink thermal resistance) and θSA (sink-to-ambient thermal
resistance).
θCA
600
100
Power SOP-8 Thermal Characteristics
θJC
700
100°C
VIN
5V
VERR
MIC5236
IN
OUT
40°C
50°C
55°C
65°C
75°C
85°C
200k
10
November 2000
MIC5236
Micrel
amount of copper can be determined by knowing the maximum power dissipation required. If the maximum ambient
temperature is 50°C and the power dissipation is as above,
632mW, the curve in Figure 7 shows that the required area of
copper is 25mm2.
The θJA of this package is ideally 63°C/W, but it will vary
depending upon the availability of copper ground plane to
which it is attached.
The same method of determining the heat sink area used for
the power-SOP-8 can be applied directly to the powerMSOP-8. The same two curves showing power dissipation
versus copper area are reproduced for the power-MSOP-8
and they can be applied identically, see Figures 8 and 9.
900
COPPER AREA (mm2)
800
COPPER AREA (mm2)
900
800
T = 125°C
J
700
85°C
50°C 25°C
600
500
T = 125°C
J
85°C
50°C 25°C
600
500
400
300
200
100
400
0
0
300
200
100
0
0
700
0.25 0.50 0.75 1.00 1.25 1.50
POWER DISSIPATION (W)
Figure 9. Copper Area vs. Power-MSOP
Power Dissipation (TA)
0.25 0.50 0.75 1.00 1.25 1.50
POWER DISSIPATION (W)
Power MSOP-8 Thermal Characteristics
Figure 7. Copper Area vs. Power-SOP
Power Dissipation (TA)
The power-MSOP-8 package follows the same idea as the
power-SO-8 package, using four ground leads with the die
attach paddle to create a single-piece electrical and thermal
conductor, reducing thermal resistance and increasing power
dissipation capability.
Quick Method
Determine the power dissipation requirements for the design
along with the maximum ambient temperature at which the
device will be operated. Refer to Figure 9, which shows safe
operating curves for three different ambient temperatures,
25°C, 50°C, and 85°C. From these curves, the minimum
amount of copper can be determined by knowing the maximum power dissipation required. If the maximum ambient
temperature is 50°C, and the power dissipation is 639mW,
the curve in Figure 9 shows that the required area of copper
is 110mm2,when using the power MSOP-8.
700
100°C
COPPER AREA (mm2)
800
40°C
50°C
55°C
65°C
75°C
85°C
900
600
500
400
300
200
100
0
0
0.25 0.50 0.75 1.00 1.25 1.50
POWER DISSIPATION (W)
Figure 8. Copper Area vs. Power-MSOP
Power Dissipation (∆TJA)
November 2000
11
MIC5236
MIC5236
Micrel
Package Information
0.026 (0.65)
MAX)
PIN 1
0.157 (3.99)
0.150 (3.81)
DIMENSIONS:
INCHES (MM)
0.020 (0.51)
0.013 (0.33)
0.050 (1.27)
TYP
0.064 (1.63)
0.045 (1.14)
45°
0.0098 (0.249)
0.0040 (0.102)
0.197 (5.0)
0.189 (4.8)
0°–8°
0.010 (0.25)
0.007 (0.18)
0.050 (1.27)
0.016 (0.40)
SEATING
PLANE
0.244 (6.20)
0.228 (5.79)
8-Lead SOIC (M)
0.122 (3.10)
0.112 (2.84)
0.199 (5.05)
0.187 (4.74)
DIMENSIONS:
INCH (MM)
0.120 (3.05)
0.116 (2.95)
0.036 (0.90)
0.032 (0.81)
0.043 (1.09)
0.038 (0.97)
0.012 (0.30) R
0.012 (0.03)
0.0256 (0.65) TYP
0.008 (0.20)
0.004 (0.10)
5° MAX
0° MIN
0.007 (0.18)
0.005 (0.13)
0.012 (0.03) R
0.039 (0.99)
0.035 (0.89)
0.021 (0.53)
8-Lead MSOP (MM)
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
USA
+ 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com
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.
© 2000 Micrel Incorporated
MIC5236
12
November 2000