MIC61300

MIC61300
Low Input Voltage, Single-Supply
High-Current LDO
General Description
Features
The Micrel MIC61300 is a 3A 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 350mV over the entire
operating temperature range.
The MIC61300 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 MIC61300 is stable with a 47µF, low-ESR ceramic
output capacitor, and includes protection features such as
thermal shutdown, current limiting and logic enable.
The MIC61300 is offered in two different packages: a lowprofile, leadless 10-pin 3mm x 3mm MLF® and a 10-pin
ePad MSOP. The MIC61300 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 150mV at room temperature
– Maximum dropout of 350mV at full load over
temperature
• 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)
200
VIN = 1.5V
VFB = 0V
150
TA = 25ºC
100
50
0
0.0
1.0
2.0
3.0
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
October 2011
M9999-101111-B
Micrel, Inc.
MIC61300
Ordering Information
Part Number
Top Mark
Voltage
Temperature Range
Package
Lead Finish
MIC61300YMME
61300
Adjustable
–40°C to +125°C
ePad MSOP-10L
Pb Free
MIC61300-10YMME
Z10J
1.0V
–40°C to +125°C
ePad MSOP-10L
Pb Free
MIC61300YML
ZJ30
Adjustable
–40°C to +125°C
3mmx3mm MLF®-10L
Pb Free
MIC61300-10YML
10ZJ
1.0V
–40°C to +125°C
®
3mmx3mm MLF -10L
Pb Free
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
Ground: Input and output return pin.
4
EN
Enable: Active-high control input that allows turn-on/-off of the LDO.
5, 6
NC
No external function. Tie to ground.
7
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.
8
SENSE
Fixed-Output Voltage Sense Input: Apply a Kelvin connection from this pin of the fixed output at
the point-of-load to sense 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 47µF ceramic capacitor with low ESR is required to
maintain stability. See Applications Information.
EP
GND
Connect to GND.
October 2011
2
M9999-101111-B
Micrel, Inc.
MIC61300
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 + 0.4V; VEN = 1.1V; IOUT = 10mA; CCP = 0.1µF; COUT = 47µF; 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 = 3A; VIN = 1.4V
1.8
IOUT = 3A; 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
−1
0
+1
−2.5
0
+2.5
mA
µA
Reference
Feedback Pin Voltage (FB Pin)
Adjustable Output
Output Voltage Accuracy
(SENSE Pin)
Fixed Output
Load Regulation
IOUT = 10mA to 3A
−0.35
Line Regulation
VIN = (VOUT + 0.4V) to 3.6V
−0.2
FB Pin Current
VFB = 0.5V
(6)
V
%
0.35
%
0.12
0.2
%/V
0.01
1
µA
Current Limit
Current Limit
3.5
VOUT = 0V
4.7
A
Dropout Voltage
Dropout Voltage (VIN − VOUT)
IOUT = 3A
150
350
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 (%) = (0.12) × ∆VIN
October 2011
3
M9999-101111-B
Micrel, Inc.
MIC61300
Electrical Characteristics(5) (Continued)
VIN = VOUT + 0.4V; VEN = 1.1V; IOUT = 10mA; CCP = 0.1µF; COUT = 47µF; 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 Enabled)
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
October 2011
4
160
°C
5
°C
M9999-101111-B
Micrel, Inc.
MIC61300
Typical Characteristics
20
ADJUSTABLE OPTION
VFB = 0V
250
200
IOUT = 3A
150
IOUT = 1.5A
100
50
1.0
VIN = VOUT + 0.4V
16
IOUT = 3A
12
8
4
VOUT = 0V
0.8
VEN = 0V
0.6
0.4
0.2
IOUT = 100mA
0
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
1.0
1.5
INPUT VOLTAGE (V)
2.5
3.0
3.5
4.0
1.0
IOUT = 10mA
0.500
0.495
25
IOUT = 0A
VFB = 0.5V
20
15
10
5
0
1.0
1.5
2.0
2.5
3.0
3.5
1.5
INPUT VOLTAGE (V)
Short-Circuit Current
vs. Input Voltage
20
10
ENABLE PIN CURRENT (µA)
VOUT = 0V
8
6
4
2
0
1.5
2.0
2.5
3.0
INPUT VOLTAGE (V)
October 2011
3.5
4.0
0.05
0.00
VOUT = 1.0V
IOUT = 10mA to 3A
-0.05
-0.10
1.0
4.0
2.0
2.5
3.0
3.5
4.0
1.0
1.5
2.0
2.5
3.0
3.5
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Enable Pin Current
vs. Input Voltage
Charge Pump Voltage
vs. Input Voltage
10
CHARGE PUMP VOLTAGE (V)
0.490
4.0
0.10
LOAD REGULATION (%)
FB PIN CURRENT (nA)
VOUT = 1.0V
3.0
Load Regulation
vs. Input Voltage
30
0.505
2.0
INPUT VOLTAGE (V)
Feedback Pin Current
vs. Input Voltage
0.510
1.0
2.0
INPUT VOLTAGE (V)
Feedback Voltage
vs. Input Voltage
FEEDBACK VOLTAGE (V)
GROUND CURRENT (µA)
GROUND CURRENT (mA)
DROPOUT VOLTAGE (mV)
300
CURRENT LIMIT (A)
Shutdown Ground Current
vs. Input Voltage
GND Pin Current
vs. Input Voltage
Dropout Voltage
vs. Input Voltage
15
10
VOUT = 1.0V
IOUT = 10mA
5
VEN = 3.6V
4.0
8
6
4
VOUT = 0.5V
2
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
INPUT VOLTAGE (V)
M9999-101111-B
4
Micrel, Inc.
MIC61300
Typical Characteristics (Continued)
Shutdown Ground Current
vs. Temperature
GND Pin Current
vs. Temperature
5
GROUND CURRENT (µA)
VOUT = 1.0V
4
IOUT = 500mA
3
2
1
0
4
VOUT = 0V
3
2
1
-20
10
40
70
100
130
-50
-20
10
40
70
TEMPERATURE (°C)
TEMPERATURE (°C)
EN Pin Current
vs. Temperature
Dropout Voltage
vs. Temperature
30
100
DROPOUT VOLTAGE (mV)
20
15
VIN = 1.5V
10
VOUT = 1.0V
VEN = 3.6V
5
-50
10
40
70
100
IOUT = 3A
100
IOUT = 1A
-20
10
40
70
100
130
40
70
TEMPERATURE (°C)
October 2011
100
130
10
40
70
100
130
Line Regulation
vs. Temperature
0.20
15
10
VIN = 1.5V
VFB = 0.5V
5
IOUT = 10mA
VIN = 1.1V to 3.6V
VOUT = 1.0V
0.15
IOUT = 10mA
0.10
0.05
0.00
0
10
-20
TEMPERATURE (°C)
LINE REGULATION (%/V)
FB PIN CURRENT (nA)
0.490
-20
4
-50
20
0.495
-50
6
2
VIN = 1.5V
0.500
130
VOUT = 0V
Feedback Pin Current
vs. Temperature
IOUT = 10mA
100
VIN = 1.5V
8
TEMPERATURE (°C)
VOUT = 1.0V
70
0
-50
0.510
40
Short Circuit Current
vs. Temperature
VFB = 0V
200
130
Feedback Voltage
vs. Temperature
10
VIN = 1.5V
TEMPERATURE (°C)
0.505
-20
TEMPERATURE (°C)
0
-20
0.75
10
300
0
-50
1.00
130
400
25
1.25
0.50
0
-50
EN PIN CURRENT (µA)
1.50
VIN =1.5V
CURRENT LIMIT (A)
GROUND CURRENT (mA)
VIN = 1.4V
VIN THRESHOLD (V)
5
FEEDBACK VOLTAGE (V)
VIN Turn-On Threshold
vs. Temperature
-50
-20
10
40
70
TEMPERATURE (°C)
6
100
130
-50
-20
10
40
70
100
130
TEMPERATURE (°C)
M9999-101111-B
Micrel, Inc.
MIC61300
Typical Characteristics (Continued)
5
0.510
250
TA =125ºC
VFB = 0V
200
TA = 85ºC
150
100
TA = 25ºC
50
TA = -40ºC
0
0.0
1.0
2.0
VIN = 1.5V
VOUT = 1.0V
0.505
0.500
0.495
0.490
1.0
Line Regulation
vs. Output Current
2.0
3.0
0.0
VIN = 1.6V to 3.6V
VOUT = 1.2V
-0.1
3
2
1
0.0
1.0
2.0
100
1.5
1.0
VOUT = 1.5V
0.5
VOUT = 1.0V
80
60
40
1.0
OUTPUT CURRENT (A)
RIPPLE REJECTION (dB)
1
VIN =1.2V
VOUT = 1.0V
0.01
IOUT = 3A
COUT = 47µF
0.001
0.01
0.1
1
10
FREQUENCY (kHz)
100
2.0
3.0
0.0
1.0
1000
60
50
40
VIN =1.5V
30
VOUT = 1.0V
20
IOUT = 100mA
10
0
0.01
COUT = 47µF
0.1
1
10
FREQUENCY (kHz)
100
3.0
Ripple Rejection
vs. Frequency
80
Gain (dB)
70
2.0
OUTPUT CURRENT (A)
Ripple Rejection
vs. Frequency
80
Noise Spectral
Density
0.1
VOUT = 1.0V
OUTPUT CURRENT (A)
Output Noise
vs. Frequency
10
VIN = 1.5V
20
0
0.0
3.0
3.0
Case Temperature* (ML)
vs. Output Current
RIPPLE REJECTION (dB)
0.0
2.0
Power Dissipation
vs. Output Current
0.0
-0.2
1.0
OUTPUT CURRENT (A)
CASE TEMPERATURE (°C)
POWER DISSIPATION (W)
0.1
VOUT = 1.0V
OUTPUT CURRENT (A)
2.0
0.2
VIN = 1.5V
4
0
0.0
3.0
OUTPUT CURRENT (A)
LINE REGULATION (%/V)
GROUND CURRENT (mA)
VIN = 1.5V
FEEDBACK VOLTAGE (V)
DROPOUT VOLTAGE (mV)
300
OUTPUT NOISE (µV/√Hz)
GND Pin Current
vs. Output Current
Feedback Voltage
vs. Output Current
Dropout Voltage
vs. Output Current
1000
Gain (dB)
70
60
50
40
30
VIN =1.5V
VOUT = 1.0V
20
IOUT = 1A
10
COUT = 47µF
0
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
Case Temperature*: The temperature measurement was taken at the hottest point on the MIC61300 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.
October 2011
7
M9999-101111-B
Micrel, Inc.
MIC61300
Functional Characteristics
October 2011
8
M9999-101111-B
Micrel, Inc.
MIC61300
Functional Characteristics (Continued)
October 2011
9
M9999-101111-B
Micrel, Inc.
MIC61300
Functional Characteristics (Continued)
October 2011
10
M9999-101111-B
Micrel, Inc.
MIC61300
Functional Diagram
Figure 1. MIC61300 Block Diagram – Fixed
Figure 2. MIC61300 Block Diagram – Adjustable
October 2011
11
M9999-101111-B
Micrel, Inc.
MIC61300
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 MIC61300 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 MIC61300 is an ultra-high-performance, low-dropout
linear regulator designed for high-current applications
that require low input voltage operation. The MIC61300
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
MIC61300 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 MIC61300 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 MIC61300. 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 MIC61300
requires a 47µF ceramic output capacitor. However, any
other type of capacitor can be placed in parallel as long
as the 47µF ceramic output capacitor is placed next to
the MIC61300.
Output voltages below 0.8V require either a 100µF or
2x 47µF 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.
October 2011
Minimum Load Current
The MIC61300 requires a minimum load of 10mA to
maintain output voltage regulation.
12
M9999-101111-B
Micrel, Inc.
MIC61300
Adjustable Regulator Design
The MIC61300 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
MIC61300.
TJ = (θJA × PD) + TA
= (60.7°C/W × 0.468W) + 75°C
= 103.4°C
Eq. 5
Table 1. Resistor Selection for Specific VOUT
October 2011
13
M9999-101111-B
Micrel, Inc.
MIC61300
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.
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:
PD(MAX) = (TJ(MAX) – TA) / θJA
= (125°C − 75°C) / (60.7°C/W)
= 0.824W
Eq. 6
Enable
The MIC61300 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.
October 2011
14
M9999-101111-B
Micrel, Inc.
MIC61300
MIC61300YML Evaluation Board Schematic (3mm × 3mm 10-Pin ePad MLF®)
Bill of Materials
Item
C1
C2
C3
Part Number
Manufacturer
10µF/10V Ceramic Capacitor, X5R,Size 0805
(2)
47µF/6.3V Ceramic Capacitor, X5R, Size 1206 or
C0805ZD106KAT2A
AVX
C3216X5ROJ476M
TDK
GRM31Cr60J476ME19L
Description
(1)
Murata(3)
47µF/6.3V Ceramic Capacitor, X5R, Size 1206 or
12066D476MAT2A
(1)
AVX
47µF/6.3V Ceramic Capacitor, X5R, Size 1206
C06035C104KAT2A
AVX(1)
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
(3)
Qty.
1
1
1
GRM188R71H104KA93D
Murata
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
CRCW080569R8F
Vishay(5)
69.8Ω Film Resistor, Size 0805, 1%
1
R2
CRCW080549R9F
(5)
Vishay
49.9Ω Film Resistor, Size 0805, 1%
1
R3
CRCW08051002F
Vishay(5)
10kΩ Film Resistor, Size 0805, 1%
1
CRCW080500R0F
(5)
0Ω Film Resistor, Size 0805, 1%
1
3A Low-Voltage, Single-Supply LDO
1
R1
R4
U1
MIC61300YML
Vishay
Micrel, Inc.
(6)
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.
October 2011
15
M9999-101111-B
Micrel, Inc.
MIC61300
MIC61300YML PCB Layout Recommendations
MIC61300YML Evaluation Board – Top Layer
MIC61300YML Evaluation Board – Bottom Layer
October 2011
16
M9999-101111-B
Micrel, Inc.
MIC61300
MIC61300YMME Evaluation Board Schematic (10-Pin ePad MSOP)
Bill of Materials
Item
C1
Part Number
C0805ZD106KAT2A
C3216X5ROJ476M
C2
GRM31Cr60J476ME19L
12066D476MAT2A
C3
R1
R2
C06035C104KAT2A
Manufacturer
(1)
AVX
(2)
TDK
Murata(3)
(1)
AVX
(1)
AVX
Description
10µF/10V Ceramic Capacitor, X5R,Size 0805
Qty.
1
47µF/6.3V Ceramic Capacitor, X5R, Size 1206 or
47µF/6.3V Ceramic Capacitor, X5R, Size 1206 or
1
47µF/6.3V Ceramic Capacitor, X5R, Size 1206
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
1
GRM188R71H104KA93D
Murata(3)
0.1µF/50V Ceramic Capacitor, X7R, Size 0603
CRCW080569R8F
Vishay(5)
69.8Ω Film Resistor, Size 0805, 1%
1
CRCW080549R9F
(5)
49.9Ω Film Resistor, Size 0805, 1%
1
(5)
Vishay
R3
CRCW08051002F
Vishay
10kΩ Film Resistor, Size 0805, 1%
1
R4
CRCW080500R0F
Vishay(5)
0Ω Film Resistor, Size 0805, 1%
1
U1
MIC61300YMME
3A Low-Voltage, Single-Supply LDO
1
Micrel, Inc.(6)
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
October 2011
17
M9999-101111-B
Micrel, Inc.
MIC61300
MIC61300YMME PCB Layout Recommendations
MIC61300YMME Evaluation Board – Top Layer
MIC61300YMME Evaluation Board – Bottom Layer
October 2011
18
M9999-101111-B
Micrel, Inc.
MIC61300
Package Information
10-Pin 3mm x 3mm MLF® (ML)
October 2011
19
M9999-101111-B
Micrel, Inc.
MIC61300
Package Information (Continued)
10-Pin e-PAD MSOP (MME)
October 2011
20
M9999-101111-B
Micrel, Inc.
MIC61300
Landing Pattern
10-Pin 3mm x 3mm MLF® (ML)
October 2011
21
M9999-101111-B
Micrel, Inc.
MIC61300
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.
October 2011
22
M9999-101111-B