Micrel MIC61150YMME Low input voltage, single-supply high-current ldo Datasheet

MIC61150
Low Input Voltage, Single-Supply
High-Current LDO
General Description
Features
The Micrel MIC61150 is a 1.5A output, low input voltage,
single-supply regulator. This regulator operates over a
single input voltage range of 1.1V to 3.6V and offers an
ultra-low dropout less than 200mV over the entire
operating temperature range.
The MIC61150 is designed to drive digital circuits requiring
low voltages at high currents such as DSPs, FPGAs,
microcontrollers, etc. The regulator is available as a 1.0V
fixed-output voltage option or as an adjustable-output
voltage option.
The MIC61150 is stable with a 22µF, low-ESR ceramic
output capacitor, and includes protection features such as
thermal shutdown, current limiting and logic enable.
The MIC61150 is offered in two different packages: a lowprofile, leadless 10-pin 3mm x 3mm MLF® and a 10-pin
ePad MSOP. The MIC61150 has 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.
• Single VIN rail: 1.1V to 3.6V
• Output voltage accuracy: ±2.5% over temperature
• Typical dropout of 75mV at room temperature
– Maximum dropout of 200mV at full load over
temperature
• COUT as low as 22µF (ceramic capacitor)
• Output voltage adjustable down to 0.5V
• Soft-start control via external capacitor
• Excellent line and load regulation
• Logic controlled shutdown
• Thermal-shutdown and current-limit protection
• 10-pin 3mm × 3mm MLF® package
• 10-pin ePad MSOP package
• Junction temperature range from −40°C to +125°C
Applications
• Point-of-load applications
• ASIC / Microprocessor power supply
• FPGA power supply
• Telecom / Networking cards
• Wireless infrastructure
____________________________________________________________________________________________________________
Typical Application
Dropout Voltage
vs. Output Current
DROPOUT VOLTAGE (mV)
100
80
VIN = 1.5V
VFB = 0V
60
TA = 25ºC
40
20
0
0.0
0.5
1.0
1.5
OUTPUT CURRENT (A)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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
November 2010
M9999-112210-A
Micrel, Inc.
MIC61150
Ordering Information
Part Number
Top Mark
Voltage
Temperature Range
Package
Lead Finish
MIC61150YMME
61150
Adjustable
–40°C to +125°C
ePad MSOP-10L
Pb Free
MIC61150-10YMME
Z10F
1.0V
–40°C to +125°C
ePad MSOP-10L
Pb Free
MIC61150YML
ZF15
Adjustable
–40°C to +125°C
MIC61150-10YML
10ZF
1.0V
–40°C to +125°C
®-
Pb Free
®-
Pb Free
3mm × 3mm MLF 10L
3mm × 3mm MLF 10L
Pin Configuration
10-Pin 3mm x 3mm MLF® (ML)
10-Pin ePad MSOP (MME)
Pin Description
Pin Number
Pin Name
Pin Function
1, 2
IN
Input Voltage.
3
GND
4
EN
5, 6
NC
No external function. Tie to ground.
CP
Internal Charge Pump Circuit Output: Connect a 0.1µF to 1µF capacitor from CP pin to GND to
control the ramp rate of the output.
FB
Adjustable Regulator Feedback Input: Connect to the resistor voltage divider network that is
placed from OUT pin to GND pin in order to set the output voltage. See Typical Applications
Circuit.
7
8
SENSE
Ground: Input and output return pin. Connect GND near the point-of-load.
Enable: Active-high control input that allows turn-on/-off of the LDO.
Fixed-Output Voltage Sense Input: Connect the SENSE pin of the fixed output option at the pointof-load to accurately monitor the output voltage level.
9, 10
OUT
Regulator Output: The output voltage is set by the resistor divider connected from VOUT to GND
(with the divided connection tied to FB). A 22µF ceramic capacitor with low ESR is required to
maintain stability. See Applications Information.
EP
GND
Connect to GND.
November 2010
2
M9999-112210-A
Micrel, Inc.
MIC61150
Absolute Maximum Ratings(1, 2)
Operating Ratings(3)
VIN to GND...................................................... −0.3V to 4.5V
VCP to GND..................................................... −0.3V to 5.5V
VOUT to GND ...................................................... −0.3V to VIN
VSENSE to GND ................................................... −0.3V to VIN
VEN to GND..................................................... −0.3V to 4.5V
VFB to GND ........................................................ −0.3V to VIN
Junction Temperature (TJ) ......................................... 150°C
Lead Temperature (soldering, 10 sec.)...................... 260°C
Storage Temperature (TS).........................−65°C to +150°C
Supply Voltage (VIN)......................................... 1.1V to 3.6V
Enable Voltage (VEN)...................................... −0.3V to 3.6V
Output Voltage Range (VOUT)........................... 0.5V to 3.0V
Ambient Temperature Range (TA) .............. –40°C to +85°C
Junction Temperature (TJ) ........................ –40°C to +125°C
Maximum Power Dissipation (PD) ............................. Note 4
Package Thermal Resistance
3mm × 3mm MLF-10L (θJA) ............................60.7°C/W
ePad MSOP-10 (θJA) ......................................76.7°C/W
Electrical Characteristics(5)
VIN = VOUT + 0.2V; VEN = 1.1V; IOUT = 10mA; CCP = 0.1µF; COUT = 22µF; TJ = 25°C. Bold values indicate –40°C ≤ TJ ≤ +125°C, unless
noted.
Parameter
Condition
Min.
Typ.
Max.
Units
3.6
V
Power Supply Input
1.1
Input Voltage Range (VIN)
Ground Pin Current
Ground Current in Shutdown
IOUT = 1.5A; VIN = 1.2V
1.8
IOUT = 1.5A; VIN = 3.6V
7.6
15
VEN = 0V; VIN = 2V; VOUT = 0V
0.1
10
0.495
0.500
0.505
0.4875
0.500
0.5125
mA
µA
Reference
Feedback Pin Voltage (FB Pin)
Adjustable Output
V
−1
+1
−2.5
+2.5
IOUT = 10mA to 1.5A
−0.3
0.3
%
Line Regulation
VIN = (VOUT + 0.2V) to 3.6V
−0.2
0.08
0.2
%/V
FB Pin Current
VFB = 0.5V
0.01
1
µA
Output Voltage Accuracy
(SENSE Pin)
Fixed Output
Load Regulation
(6)
%
Current Limit
Current Limit
1.7
VOUT = 0V
3.5
A
Dropout Voltage
Dropout Voltage (VIN − VOUT)
IOUT = 1.5A
75
200
mV
Notes:
1.
Exceeding the absolute maximum rating may damage the device.
2.
Devices are ESD sensitive. Handling precautions recommended. Human body model (HBM), 1.5k in series with 100pF.
3.
The device is not guaranteed to function outside its operating rating.
4.
PD(MAX) = (TJ(MAX) – TA) / θJA, where θJA, depends upon the printed circuit layout. See “Applications Information.”
5.
Specification for packaged product only.
6.
∆VOUT (%) = 0.08 × ∆VIN
November 2010
3
M9999-112210-A
Micrel, Inc.
MIC61150
Electrical Characteristics(5) (Continued)
VIN = VOUT + 0.2V; VEN = 1.1V; IOUT = 10mA; CCP = 0.1µF; COUT = 22µF; TJ = 25°C. Bold values indicate –40°C ≤ TJ ≤ +125°C, unless
noted.
Parameter
Condition
Min.
Typ.
1.1
0.6
Max.
Units
Enable Input
EN Logic Level High
EN Logic Level Low
0.5
EN Hysteresis
100
EN Pin Current
Start-Up Time
VEN = 0.2V (Regulator Shutdown)
V
0.2
mV
0.02
VEN = 3.6V (Regulator Enable)
15
CCP = 0.1µF; COUT = 10µF
VIN = 1.2V, VOUT = 0.5V
250
V
µA
750
µs
Minimum Load Current
10
Minimum Load Current
mA
Thermal Protection
Over-Temperature Shutdown
TJ Rising
Over-Temperature Shutdown
Hysteresis
November 2010
4
160
°C
5
°C
M9999-112210-A
Micrel, Inc.
MIC61150
Typical Characteristics
Dropout Voltage
vs. Input Voltage
20
100
IOUT = 1.5A
80
60
IOUT = 750mA
40
20
IOUT = 100mA
0
1.0
VIN = VOUT + 0.2V
16
IOUT = 1.5A
12
8
4
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
1.5
2.0
2.5
3.0
3.5
4.0
0.500
0.495
0.490
25
VFB = 0.5V
20
15
10
0
3
4
4
1.5
2.0
2.5
3.0
3.5
4.0
2
1
0
1.5
2.0
2.5
3.0
INPUT VOLTAGE (V)
November 2010
3.5
VOUT = 1.0V
-0.1
IOUT = 10mA to 1.5A
4.0
15
VOUT = 1.0V
IOUT = 10mA
VEN = 3.6V
5
2.0
2.5
3.0
3.5
4.0
Charge Pump Voltage
vs. Input Voltage
10.0
10
1.5
INPUT VOLTAGE (V)
CHARGE PUMP VOLTAGE (V)
ENABLE PIN CURRENT (µA)
3
4.0
0.0
1.0
20
4
3.5
0.1
Enable Pin Current
vs. Input Voltage
Short-Circuit Current
vs. Input Voltage
VOUT = 0V
3.0
Load Regulation
vs. Input Voltage
INPUT VOLTAGE (V)
5
2.5
-0.2
1.0
INPUT VOLTAGE (V)
1.0
2.0
0.2
IOUT = 0A
5
3
1.5
INPUT VOLTAGE (V)
LOAD REGULATION (%)
FB PIN CURRENT (nA)
VOUT = 1.0V
IOUT = 10mA
2
0.2
1.0
30
2
0.4
Feedback Pin Current
vs. Input Voltage
0.510
1
VEN = 0V
0.6
INPUT VOLTAGE (V)
Feedback Voltage
vs. Input Voltage
0.505
VOUT = 0V
0.8
0.0
1.0
INPUT VOLTAGE (V)
FEEDBACK VOLTAGE (V)
GROUND CURRENT (µA)
ADJUSTABLE OPTION
VFB = 0V
GROUND CURRENT (mA)
DROPOUT VOLTAGE (mV)
120
CURRENT LIMIT (A)
Shutdown Ground Current
vs. Input Voltage
GND Pin Current
vs. Input Voltage
0
8.0
6.0
4.0
VOUT = 0.5V
2.0
IOUT = 50mA
0.0
1.0
1.5
2.0
2.5
3.0
INPUT VOLTAGE (V)
5
3.5
4.0
0
1
2
3
4
INPUT VOLTAGE (V)
M9999-112210-A
Micrel, Inc.
MIC61150
Typical Characteristics (Continued)
GND Pin Current
vs. Temperature
Shutdown Ground Current
vs. Temperature
5
VIN = 1.2V
4
VOUT = 1.0V
IOUT = 500mA
3
2
1
VIN =1.5V
4
VOUT = 0V
3
2
1
0
0
-50
-20
10
40
70
100
-20
10
70
TEMPERATURE (°C)
EN Pin Current
vs. Temperature
Dropout Voltage
vs. Temperature
100
10
VIN = 1.5V
VOUT = 1.0V
5
VEN = 3.6V
10
40
70
100
160
VFB = 0V
120
IOUT = 1.5A
80
IOUT = 100mA
40
FB PIN CURRENT (nA)
0.500
0.495
10
40
70
100
130
10
40
70
TEMPERATURE (°C)
November 2010
VOUT = 0V
-50
-20
10
100
130
40
70
100
130
TEMPERATURE (°C)
Line Regulation
vs. Temperature
0.20
VIN = 1.5V
20
VFB = 0.5V
15
10
5
0
0.490
-20
VIN = 1.5V
2
1
25
VIN = 1.5V
-50
3
Feedback Pin Current
vs. Temperature
VOUT = 1.0V
130
4
TEMPERATURE (°C)
IOUT = 10mA
100
0
-20
TEMPERATURE (°C)
0.505
70
5
-50
0.510
40
VIN = 1.5V
130
Feedback Pin Voltage
vs. Temperature
10
Short-Circuit Current
vs. Temperature
LINE REGULATION (%/V)
-20
-20
TEMPERATURE (°C)
0
-50
0.75
-50
CURRENT LIMIT (A)
DROPOUT VOLTAGE (mV)
15
1.00
130
200
0
FEEDBACK VOLTAGE (V)
40
TEMPERATURE (°C)
20
1.25
0.50
-50
130
25
EN PIN CURRENT (µA)
1.50
VIN THRESHOLD (V)
GROUND CURRENT (µA)
GROUND CURRENT (mA)
5
VIN Turn-On Threshold
vs. Temperature
0.10
0.00
VIN = 1.2 to 3.6V
-0.10
VOUT = 1.0V
IOUT = 10mA
-0.20
-50
-20
10
40
70
TEMPERATURE (°C)
6
100
130
-50
-20
10
40
70
100
130
TEMPERATURE (°C)
M9999-112210-A
Micrel, Inc.
MIC61150
Typical Characteristics (Continued)
0.510
VFB = 0V
150
TA =125ºC
TA = 85ºC
100
TA = -40ºC
50
TA = 25ºC
0
0.505
0.500
VIN = 1.5V
0.495
VOUT = 1.0V
0.490
0.0
0.5
1.0
1.5
2.0
1.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
OUTPUT CURRENT (A)
Line Regulation
vs. Output Current
Power Dissipation
vs. Output Current
Case Temperature* (ML)
vs. Output Current
1.00
VOUT = 1.0V
-0.2
0.5
1.0
0.75
0.50
VOUT = 1.5V
0.25
VOUT = 1.0V
0.00
1.5
0.5
Output Noise
RIPPLE REJECTION (dB)
1
VIN =1.2V
VOUT = 1.0V
IOUT = 1.5A
COUT = 22µF
10
FREQUENCY (kHz)
60
40
20
1.0
1.5
0.0
0.5
100
1000
80
70
70
60
50
30
VIN =1.2V
VOUT = 1.0V
20
IOUT = 500mA
10
C OUT = 22µF
0
0.01
0.1
1
10
FREQUENCY (kHz)
1.5
Ripple Rejection
80
40
1.0
OUTPUT CURRENT (A)
Ripple Rejection
10
1
VOUT = 1.0V
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
0.1
VIN = 1.5V
80
0
0.0
RIPPLE REJECTION (dB)
0.0
100
CASE TEMPERATURE (°C)
VIN = 1.2V to 3.6V
-0.1
0.001
0.01
3.0
OUTPUT CURRENT (A)
0.0
0.01
VOUT = 1.0V
OUTPUT CURRENT (A)
0.1
0.1
VIN = 1.5V
4.0
0.0
0.0
POWER DISSIPATION (W)
0.2
LINE REGULATION (%/V)
5.0
GROUND CURRENT (mA)
VIN = 1.5V
FEEDBACK VOLTAGE (V)
DROPOUT VOLTAGE (mV)
200
OUTPUT NOISE (µV/√Hz)
GND Pin Current
vs. Output Current
Feedback Voltage
vs. Output Current
Dropout Voltage
vs. Output Current
100
1000
60
50
40
30
VIN =1.2V
VOUT = 1.0V
20
IOUT = 1.5A
10
COUT = 22µF
0
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
Case Temperature*: The temperature measurement was taken at the hottest point on the MIC61150 case mounted on a 2.25 square inch PCB at an
ambient temperature of 25°C; see “Thermal Measurement” section. Actual results will depend upon the size of the PCB, ambient temperature and
proximity to other heat emitting components.
November 2010
7
M9999-112210-A
Micrel, Inc.
MIC61150
Functional Characteristics
November 2010
8
M9999-112210-A
Micrel, Inc.
MIC61150
Functional Characteristics (Continued)
November 2010
9
M9999-112210-A
Micrel, Inc.
MIC61150
Functional Characteristics (Continued)
November 2010
10
M9999-112210-A
Micrel, Inc.
MIC61150
Functional Diagram
Figure 1. MIC61150 Block Diagram – Fixed
Figure 2. MIC61150 Block Diagram – Adjustable
November 2010
11
M9999-112210-A
Micrel, Inc.
MIC61150
Input Capacitor
A 10µF ceramic input capacitor is all that is required for
most applications. However, fast load transient and low
headroom (VIN – VOUT) requires additional bulk bypass
capacitance to ensure that the regulator does not drop
out of regulation.
The input capacitor must be placed on the same side of
the board and next to the MIC61150 to minimize the
dropout voltage and voltage ringing during transient and
short circuit conditions. It is also recommended to use
two vias for each end of the capacitor to connect to the
power and ground plane.
X7R or X5R dielectric ceramic capacitors are
recommended
because
of
their
temperature
performance. X7R-type capacitors change capacitance
by 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 in parallel with the ceramic capacitor(s).
See Typical Characteristics section for examples of load
transient response.
Functional Description
The MIC61150 is an ultra-high-performance, low-dropout
linear regulator designed for high-current applications
that require low input voltage operation. The MIC61150
operates from a single input supply and generates an
internal supply that is higher than the input voltage to
drive an on-chip N-Channel MOSFET. The N-Channel
MOSFET significantly reduces the dropout voltage when
compared to a traditional P-Channel MOSFET.
P-Channel MOSFETs are usually used in single-supply
low-dropout linear voltage regulators. However, for input
voltages below 1.5V, there is not sufficient gate drive to
turn on the P-Channel. To solve this issue, the
MIC61150 uses a simple internal charge pump to drive
the internal N-Channel MOSFET’s gate higher than the
input voltage, see Functional Diagram. The N-Channel
MOSFET greatly reduces the dropout voltage for the
same die area when compared to that of a P-Channel.
Other added benefits of the charge pump include the
ability to control the output voltage rise time and to
improve the power supply rejection ratio (PSRR). This is
accomplished by using the VCP supply to power the error
amplifier.
The other significant advantage of the MIC61150 over a
P-Channel regulator is its transient response. The NChannel in the follower configuration is much faster than
its P-channel counter part and is simpler to compensate.
Any type of output capacitor can be placed in parallel
with it as long as the minimum value output ceramic
capacitor is placed next to the MIC61150. See the
Output Capacitor section for specific details. Also, the
regulator is fully protected from damage due to fault
conditions by offering linear current limiting and thermal
shutdown.
Output Capacitor
As part of the frequency compensation, the MIC61150
requires a 22µF ceramic output capacitor. However, any
other type of capacitor can be placed in parallel as long
as the 22µF ceramic output capacitor is placed next to
the MIC61150.
Output voltages below 0.8V require either a 47µF or
2x 22µF output capacitance for large output transients.
The increased output capacitance reduces the output
voltage drop caused by load transients, which increases
as a percentage of the output voltage as the output
voltage is lowered.
The output capacitor type and placement criteria are the
same as the input capacitor. See the Input Capacitor
section for a detailed description.
Soft-Start
Soft-start reduces the power supply input surge current
at startup by controlling the output voltage rise time. The
input surge appears while the output capacitor is
charged up. A slower output rise time will draw a lower
input surge current.
The CP pin is the output of the internal charge pump.
The soft-start rise time is controlled by the external
capacitor connected from CP pin to GND. During softstart, the charge pump feeds a current to CCP. The
output voltage rise time is dependent upon the value of
CCP, the input voltage, output voltage and the current
limit. The value of the charge pump external capacitor
selected is recommended in the range of 0.1µF to 1µF,
although larger value capacitors can be used for a
longer turn-on time.
November 2010
Minimum Load Current
The MIC61150 requires a minimum load of 10mA to
maintain output voltage regulation.
12
M9999-112210-A
Micrel, Inc.
MIC61150
Adjustable Regulator Design
The MIC61150 adjustable version allows programming
the output voltage from 0.5V to 3.0V by placing a resistor
divider network (R1, R2) from VOUT to GND (see
Application Circuit). The high side of R1 should be
connected at the point-of-load for high-accuracy Kelvin
sensing. VOUT is determined by the following equation:
⎛ R1 ⎞
VOUT = 0.5 × ⎜
+ 1⎟
⎝ R2 ⎠
Thermal Design
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. To help reduce the thermal resistance,
the ePad (underneath the IC) should be soldered to the
PCB ground and the placement of thermal vias either
underneath or near the ePad is highly recommended.
Thermal design requires the following applicationspecific 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
datasheet:
Eq. 1
where VOUT is the desired output voltage.
The resistor (R2) value between the FB pin and GND is
selected to maintain a minimum 10mA load on the
output.
The resistor values are calculated from the previous
equation, resulting in the following:
PD = (VIN - VOUT) × IOUT + (VIN × IGND)
⎛V
⎞
R1 = R2 × ⎜⎜ OUT − 1⎟⎟
⎝ 0.5
⎠
Eq. 2
where the ground current is approximated by using
numbers from the Electrical Characteristics or Typical
Characteristics sections
For example, given an expected maximum ambient
temperature (TA) of 75°C with VIN = 1.2V, VOUT = 0.9V,
and IOUT = 1.5A, first calculate the expected PD using
Equation 1:
Table 1 is a list of resistor combinations to set the output
voltage. A 1% tolerance is recommended for both R1
and R2. For a unity gain, 0.5V output voltage, connect
the FB pin directly to the output.
VOUT
R1
R2
0.5V
−
49.9Ω
0.6V
10.0Ω
49.9Ω
0.7V
20.0Ω
49.9Ω
0.8V
30.1Ω
49.9Ω
0.9V
40.2Ω
49.9Ω
1.0
49.9Ω
49.9Ω
1.1V
60.4Ω
49.9Ω
1.2V
69.8Ω
49.9Ω
1.5V
100Ω
49.9Ω
1.8V
130Ω
49.9Ω
2.2V
169Ω
49.9Ω
Eq. 3
PD = (1.2V – 0.9V) × 1.5A + 1.2V × 0.015A
= 0.468W
Eq. 4
Next, determnine the junction temperature for the
expected power dissipation above using the thermal
resistance (θJA) of the 10-pin 3mm × 3mm MLF® (YML)
adhering to the following criteria for the PCB design:
1oz. copper and 100mm2 copper area for the
MIC61150.
TJ = (θJA × PD) + TA
= (60.7°C/W × 0.468W) + 75°C
= 103.4°C
Eq. 5
Table 1. Resistor Selection for Specific VOUT
November 2010
13
M9999-112210-A
Micrel, Inc.
MIC61150
To determine the maximum power dissipation allowed
that would not exceed the IC’s maximum junction
temperature (125°C) when operating at a maximum
ambient temperature of 75°C by:
To avoid this messy thermal couple grease or glue, an
infrared thermometer is recommended. Most infrared
thermometers’ spot size are too large for an accurate
reading on small form factor ICs. However, an IR
thermometer from Optris has a 1mm spot size, which
®
makes it ideal for the 3mm × 3mm MLF package. Also,
get the optional stand. The stand makes it easy to hold
the beam on the IC for long periods of time.
PD(MAX) = (TJ(MAX) – TA) / θJA
= (125°C − 75°C) / (60.7°C/W)
= 0.824W
Eq. 6
Enable
The MIC61150 features an active high enable input (EN)
that allows ON/OFF control of the regulator. The current
through the device reduces to near “zero” when the
device is shutdown, with only microamperes of leakage
current. The EN input may be directly tied to VIN or
driven by a voltage that is higher than VIN as long as the
voltage does not exceed the maximum operating rating
of the EN pin.
Thermal Measurements
It is always wise to measure the IC’s case temperature
to make sure that it is within its operating limits. Although
this might seem like a very elementary task, it is very
easy to get erroneous results. The most common
mistake is to use the standard thermal couple that
comes with the thermal voltage meter. This thermal
couple wire gauge is large, typically 22 gauge, and
behaves like a heatsink, resulting in a lower case
measurement.
There are two suggested methods for measuring the IC
case temperature: a thermal couple or an infrared
thermometer. If a thermal couple is used, it must be
constructed of 36 gauge wire or higher to minimize the
wire heatsinking effect. In addition, the thermal couple tip
must be covered in either thermal grease or thermal glue
to make sure that the thermal couple junction is making
good contact to the case of the IC. This thermal couple
from Omega (5SC-TT-K-36-36) is adequate for most
applications.
November 2010
14
M9999-112210-A
Micrel, Inc.
MIC61150
MIC61150YML Evaluation Board Schematic (3mm × 3mm 10-Pin ePad MLF®)
Bill of Materials
Item
Part Number
C0805ZD106KAT2A
C1
C2012X5R1C106M
GRM219R61A106KE44D
C2012X5R0J226M
C2
C3
GRM21BR60J226ME39L
Manufacturer
Description
(1)
10µF/10V Ceramic Capacitor, X5R,Size 0805
(2)
10µF/10V Ceramic Capacitor, X5R,Size 0805
AVX
TDK
Murata(3)
TDK(2)
(3)
Murata
1
10µF/10V Ceramic Capacitor, X5R,Size 0805
22µF/6.3V Ceramic Capacitor, X5R, Size 0805 or
22µF/6.3V Ceramic Capacitor, X5R, Size 0805 or
08056D226MAT2A
AVX(1)
22µF/6.3V Ceramic Capacitor, X5R, Size 0805
C06035C104KAT2A
AVX(1)
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
(3)
Qty.
1
1
GRM188R71H104KA93D
Murata
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
R1
CRCW060369R8FKEA
Vishay(4)
69.8Ω Film Resistor, Size 0603, 1%
1
R2
CRCW060349R9FKEA
Vishay(4)
49.9Ω Film Resistor, Size 0603, 1%
1
CRCW060310K0FKEA
(4)
10kΩ Film Resistor, Size 0603, 1%
1
R3
R4
CRCW080500R0F
U1
MIC61150YML
Vishay
(4)
Vishay
Micrel, Inc.(5)
0Ω Film Resistor, Size 0603, 1%
1
1.5A Low-Voltage, Single-Supply LDO
1
Notes:
1. AVX: www.avx.com.
2. TDK: www.tdk.com.
3. Murata: www.murata.com.
4. Vishay: www.vishay.com.
5. Micrel, Inc.: www.micrel.com.
November 2010
15
M9999-112210-A
Micrel, Inc.
MIC61150
MIC61150YML PCB Layout Recommendations
MIC61150YML Evaluation Board – Top Layer
MIC61150YML Evaluation Board – Bottom Layer
November 2010
16
M9999-112210-A
Micrel, Inc.
MIC61150
MIC61150YMME Evaluation Board Schematic (10-Pin ePad MSOP)
Bill of Materials
Item
Part Number
C0805ZD106KAT2A
C1
C2012X5R1C106M
GRM219R61A106KE44D
C2012X5R0J226M
C2
C3
GRM21BR60J226ME39L
Manufacturer
Description
(1)
10µF/10V Ceramic Capacitor, X5R,Size 0805
(2
10µF/10V Ceramic Capacitor, X5R,Size 0805
AVX
TDK
(3)
Murata
Qty.
1
10µF/10V Ceramic Capacitor, X5R,Size 0805
TDK(2)
22µF/6.3V Ceramic Capacitor, X5R, Size 0805 or
Murata(3)
22µF/6.3V Ceramic Capacitor, X5R, Size 0805 or
08056D226MAT2A
(1)
AVX
22µF/6.3V Ceramic Capacitor, X5R, Size 0805
C06035C104KAT2A
AVX(1)
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
(3)
1
1
GRM188R71H104KA93D
Murata
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
CRCW060369R8FKEA
Vishay(4)
69.8Ω Film Resistor, Size 0603, 1%
1
R2
CRCW060349R9FKEA
(4)
Vishay
49.9Ω Film Resistor, Size 0603, 1%
1
R3
CRCW060310K0FKEA
Vishay(4)
10kΩ Film Resistor, Size 0603, 1%
1
0Ω Film Resistor, Size 0603, 1%
1
1.5A Low-Voltage, Single-Supply LDO
1
R1
R4
U1
CRCW080500R0F
MIC61150YMME
(4)
Vishay
Micrel, Inc.
(5)
Notes:
1. AVX: www.avx.com.
2. TDK: www.tdk.com.
3. Murata: www.murata.com.
4. Vishay: www.vishay.com.
5. Micrel, Inc.: www.micrel.com.
November 2010
17
M9999-112210-A
Micrel, Inc.
MIC61150
MIC61150YMME PCB Layout Recommendations
MIC61150YMME Evaluation Board – Top Layer
MIC61150YMME Evaluation Board – Bottom Layer
November 2010
18
M9999-112210-A
Micrel, Inc.
MIC61150
Package Information
10-Pin 3mm x 3mm MLF® (ML)
November 2010
19
M9999-112210-A
Micrel, Inc.
MIC61150
Package Information (Continued)
10-Pin e-PAD MSOP (MME)
November 2010
20
M9999-112210-A
Micrel, Inc.
MIC61150
Landing Pattern
10-Pin 3mm x 3mm MLF® (ML)
November 2010
21
M9999-112210-A
Micrel, Inc.
MIC61150
Landing Pattern (Continued)
10-Pin e-PAD MSOP (ME)
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.
© 2010 Micrel, Incorporated.
November 2010
22
M9999-112210-A
Similar pages