Datasheet

MIC5512/14
Single 300mA LDO
in 1.6mm × 1.6mm Thin DFN Package
General Description
Features
The MIC5512/14 is an advanced general-purpose LDO
ideal for powering general-purpose portable devices. The
MIC5512/14 family of products provides a highperformance 300mA LDO in an ultra-small 1.6mm x
1.6mm Thin DFN package. The MIC5512 and MIC5514
LDOs include an auto-discharge feature on the output that
is activated when the enable pin is low. The MIC5514 have
an internal pull down resistor on the enable pin that will
disable the output when the enable pin is left floating, this
is ideal for applications where the control signal is floating
during processor boot up.
Ideal for battery-powered applications, the MIC5512/14
offers a typical 1% initial accuracy, low dropout voltage
(160mV at 300mA), and low ground current (typically
38µA). The MIC5512/14 can also be put into a zero-offmode current state, drawing virtually no current when
disabled.
The MIC5512/14 has an operating junction temperature
range of –40°C to 125°C.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
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Input voltage range: 2.5V to 5.5V
Fixed output voltage range: 1.0V to 3.3V
300mA guaranteed output current
±1% initial output accuracy
Stable with 1µF ceramic output capacitors
Low dropout voltage: 160mV @ 300mA
Output discharge circuit
Internal enable pull down resistor (MIC5514)
Available in ultra-small 6-pin 1.6mm × 1.6mm Thin DFN
package
Applications
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Smart phones
DSCs, GPS, PMPs, and PDAs
Medical devices
Portable electronics
5V systems
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 8, 2013
Revision 1.1
Micrel, Inc.
MIC5512/14
Ordering Information
Marking
Code
Output
(1)
Voltage
AutoDischarge
EN
Pull-down
Temperature
Range
MIC5512-1.2YMT
7E
1.2V
YES
NO
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5512-1.8YMT
7D
1.8V
YES
NO
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5512-2.8YMT
7C
2.8V
YES
NO
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5512-3.3YMT
7A
3.3V
YES
NO
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5514-1.2YMT
B8
1.2V
YES
YES
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5514-1.8YMT
B7
1.8V
YES
YES
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5514-2.8YMT
A9
2.8V
YES
YES
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5514-3.0YMT
A8
3.0V
YES
YES
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
MIC5514-3.3YMT
A7
3.3V
YES
YES
–40°C to +125°C
6-Pin 1.6mm x 1.6mm Thin DFN
Part Number
Package
(2,3)
Notes:
1. Other voltages are available. Contact Micrel for details.
2. Thin DFN ▲ = Pin 1 identifier.
3. Thin DFN is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
6-Pin 1.6mm × 1.6mm Thin DFN (MT)
(Top View)
Pin Description
Pin Number
Pin Name
1
EN
Enable Input: Active High. High = ON; Low = OFF. MIC5512 do not leave floating. MIC5514 has an
internal 4MΩ pull down resistor and will disable VOUT when EN is floating.
2, 5
NC
Not Connected.
3
VIN
Input Supply.
4
VOUT
Output Voltage. When disabled the MIC5512/14 switches in an internal 25Ω load to discharge the
external capacitors.
6
GND
Ground.
EP
ePad
Exposed Heatsink Pad. Connect to GND for best performance.
April 8, 2013
Pin Function
2
Revision 1.1
Micrel, Inc.
MIC5512/14
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) .......................................... –0.3V to 6V
Enable Voltage (VEN). ........................................ –0.3V to VIN
(3)
Power Dissipation (PD) ........................... Internally Limited
Lead Temperature (soldering, 10s) ............................ 260°C
Junction Temperature (TJ) ........................ –40°C to +150°C
Storage Temperature (Ts) ......................... –65°C to +150°C
(4)
ESD Rating .................................................................. 3kV
Supply Voltage (VIN) ......................................... 2.5V to 5.5V
Enable Voltage (VEN) .............................................. 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
1.6mm × 1.6mm Thin DFN-6 (θJA) .................. 92.4°C/W
Electrical Characteristics(5)
VIN = VEN = VOUT + 1V; CIN = COUT = 1µF; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted.
Parameter
Output Voltage Accuracy
Line Regulation
Min.
Typ.
Max.
Variation from nominal VOUT
–2.0
±1
+2.0
Variation from nominal VOUT; –40°C to +125°C
–3.0
VIN = VOUT +1V to 5.5V; IOUT = 100µA
Load Regulation
Dropout Voltage
Condition
(6)
Ground Pin Current
0.02
IOUT = 100µA to 300mA
(7)
(8)
Ground Pin Current in Shutdown
+3.0
Units
%
0.3
%/V
8
40
mV
IOUT = 150mA
IOUT = 300mA
80
160
190
380
mV
IOUT = 0mA
IOUT = 300mA
38
42
55
65
µA
0.05
1
µA
900
mA
VEN = 0V
Ripple Rejection
f = 1kHz; COUT = 1µF
Current Limit
VOUT = 0V
65
Output Voltage Noise
COUT = 1µF, 10Hz to 100kHz
175
µVRMS
Auto-Discharge NFET Resistance
VEN = 0V; VIN = 3.6V; IOUT = –3mA
25
Ω
MIC5514 Only
4
MΩ
400
630
dB
Enable Input
Enable Pull-Down Resistor
Enable Input Voltage
Enable Input Current MIC5512
Enable Input Current MIC5514
Turn-On Time
0.2
Logic Low
1.2
Logic High
VEN = 0V
0.01
1
VEN = 5.5V
0.01
1
VEN = 0V
0.01
1
VEN = 5.5V
1.4
2
COUT = 1µF; IOUT = 150mA
50
125
V
µA
µA
µs
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. 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 temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
5. Specification for packaged product only.
6.
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to heating effects are
covered by the thermal regulation specification.
7.
Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V
differential. For outputs below 2.5V, dropout voltage is the input-to-output differential with the minimum input voltage 2.5V.
8.
Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin
current.
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Micrel, Inc.
MIC5512/14
Typical Characteristics
-100
IOUT = 100mA
-60
-50
-40
IOUT = 300mA
-30
COUT = 1µF
CIN = 1µF
VIN = 3.8V
VOUT = 2.8V
-20
-10
0
10
10
100
1k
1,000
120
100
80
60
40
VOUT = 3.3V
CIN = COUT = 1µF
20
0
50
GROUND CURRENT (µA)
300mA
40
100µA
30
VEN = VIN
VOUT = 3.3V
CIN = COUT = 1µF
100
4.0
4.5
50mA
40
20
150
200
250
300
-40
-20
5.0
50
48
44
43
42
41
40
39
38
VIN = VEN = VOUT + 1V
VOUT = 3.3V
CIN = COUT = 1µF
40
60
80
100
120
300mA
46
44
42
50mA
40
150mA
38
100µA
36
VIN = VEN = VOUT + 1V
VOUT = 3.3V
CIN = COUT = 1µF
34
32
30
0
50
100
150
200
250
300
-40
-20
Output Voltage
vs. Output Current
0
20
40
60
80
100
120
TEMPERATURE (°C)
LOAD CURRENT (mA)
Output Voltage
vs. Supply Voltage
3.50
20
Ground Current
vs. Temperature
36
5.5
SUPPLY VOLTAGE (V)
Output Voltage
vs. Temperature
3.5
3.50
3.4
3.40
3.35
3.30
3.25
VIN = VEN = VOUT+ 1V
VOUT = 3.3V
CIN = COUT = 1µF
3.20
3.15
3.45
3.3
50mA
3.2
3.1
3.0
150mA
2.9
2.8
300mA
VIN = VEN
VOUT = 3.3V
CIN = COUT = 1µF
2.7
2.6
3.10
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.45
OUTPUT VOLTAGE (V)
0
TEMPERATURE (°C)
45
20
3.5
60
46
37
3.0
150mA
80
Ground Current
vs. Load Current
50
2.5
100
OUTPUT CURRENT (mA)
Ground Current
vs. Supply Voltage
25
VOUT = 3.3V
CIN = COUT = 1µF
120
0
10k
100k 1,000,000
1M
10,000
100,000
35
140
0
FREQUENCY (Hz)
45
300mA
160
GROUND CURRENT (µA)
-70
180
140
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
-80
PSRR (dB)
200
160
-90
GROUND CURRENT (µA)
Dropout Voltage
vs.Temperature
Dropout Voltage
vs. Output Current
Power Supply
Rejection Ratio
50
100
150
200
250
OUTPUT CURRENT (mA)
April 8, 2013
300
3.35
300mA
3.30
150mA
VIN = VOUT+ 1V
VOUT = 3.3V
CIN = COUT = 1µF
3.25
3.20
2.5
0
3.40
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
4
5.0
5.5
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Revision 1.1
Micrel, Inc.
MIC5512/14
Typical Characteristics (Continued)
Current Limit
vs. Supply Voltage
750
CURRENT LIMIT (mA)
700
650
600
550
500
450
400
VOUT = 1.2V
CIN = COUT = 1µF
350
300
2.5
3
3.5
4
4.5
5
5.5
SUPPLY VOLTAGE (V)
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Micrel, Inc.
MIC5512/14
Functional Characteristics
April 8, 2013
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Micrel, Inc.
MIC5512/14
Block Diagram
MIC55xx Block Diagram
April 8, 2013
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Revision 1.1
Micrel, Inc.
MIC5512/14
Forcing the enable pin high enables the output voltage.
The MIC5512 enable pin uses CMOS technology and the
enable pin cannot be left floating; a floating enable pin
may cause an indeterminate state on the output. The
MIC5514 has an internal pull down resistor on the enable
pin to disable the output when the enable pin is floating.
Application Information
MIC5512/14 are high performance 300mA LDOs. The
MIC5512/14 includes an auto-discharge circuit that is
switched on when the regulator is disabled through the
enable pin. The MIC5512/14 regulators are fully
protected from damage due to fault conditions, offering
linear current limiting and thermal shutdown.
Thermal Considerations
The MIC5512/14 is designed to provide 300mA of
continuous current in a very small package. Maximum
ambient operating temperature can be calculated based
on the output current and the voltage drop across the
part. For example if the input voltage is 3.6V, the output
voltage is 2.8V, and the output current = 300mA. The
actual power dissipation of the regulator circuit can be
determined using Equation 1:
Input Capacitor
The MIC5512/14 is a high-performance, high-bandwidth
device. An input capacitor of 1µF is required from the
input to ground to provide stability. Low-ESR ceramic
capacitors provide optimal performance at a minimum of
space. Additional high-frequency capacitors, such as
small-valued NPO dielectric-type capacitors, help filter
out high-frequency noise and are good practice in any
RF-based circuit. X5R or X7R dielectrics are
recommended for the input capacitor. Y5V dielectrics
lose most of their capacitance over temperature and are
therefore, not recommended.
PD = (VIN – VOUT1) I OUT + VIN IGND
Because this device is CMOS and the ground current is
typically <100µA over the load range, the power
dissipation contributed by the ground current is < 1% and
can be ignored for Equation 2:
Output Capacitor
The MIC5512/14 requires an output capacitor of 1µF or
greater to maintain stability. The design is optimized for
use with low-ESR ceramic chip capacitors. High-ESR
capacitors are not recommended because they may
cause high-frequency oscillation. The output capacitor
can be increased, but performance has been optimized
for a 1µF ceramic output capacitor and does not improve
significantly with larger capacitance.
PD = (3.6V – 2.8V) × 300mA
PD = 0.240W
X7R/X5R dielectric-type 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 capacitor to ensure the same minimum
capacitance over the equivalent operating temperature
range.
Eq. 2
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and Equation 3:
 TJ(MAX) − TA
PD(MAX) = 
θ JA





Eq. 3
TJ(MAX) = 125°C, the maximum junction temperature of the
die, θJA thermal resistance = 92.4°C/W for the DFN
package.
No-Load Stability
Unlike many other voltage regulators, the MIC5512/14
remains stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Substituting PD for PD(MAX) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is
92.4°C/W.
The maximum power dissipation must not be exceeded
for proper operation.
Enable/Shutdown
The MIC5512/14 comes with an active-high enable pin
that allows the regulator to be disabled. Forcing the
enable pin low disables the regulator and sends it into an
off mode current state drawing virtually zero current.
When disabled the MIC5512/14 switches an internal 25Ω
load on the regulator output to discharge the external
capacitor.
April 8, 2013
Eq. 1
8
Revision 1.1
Micrel, Inc.
MIC5512/14
For example, when operating the MIC5512-MYMT at an
input voltage of 3.6V and 300mA load with a minimum
footprint layout, the maximum ambient operating
temperature TA can be determined as in Equation 4:
0.240W = (125°C – TA)/(92.4°C/W)
TA = 102.8°C
Eq. 4
Therefore, the maximum ambient operating temperature
allowed in a 1.6mm × 1.6mm DFN package is 102.8°C.
For a full discussion of heat sinking and thermal effects
on voltage regulators, refer to the “Regulator Thermals”
section of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook. This information can be found on
Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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Micrel, Inc.
MIC5512/14
Typical Application Schematic
Bill of Materials
Item
C1, C2
U1
Part Number
GRM155R61A105KE15D
MIC5512-xxYMT
MIC5514-xxYMT
Manufacturer
Murata
(1)
(2)
Micrel, Inc.
Description
Qty.
1µF Ceramic Capacitor, 10V, X5R, Size 0402
2
Single 300mA LDO in 1.6mm × 1.6mm Thin DFN Package
1
Notes:
1. Murata: www.murata.com.
2. Micrel, Inc.: www.micrel.com.
April 8, 2013
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Micrel, Inc.
MIC5512/14
PCB Layout Recommendations
Top Layer
Bottom Layer
April 8, 2013
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Revision 1.1
Micrel, Inc.
MIC5512/14
Package Information(1) and Recommended Landing Pattern
6-Pin 1.6mm × 1.6mm Thin DFN (MT)
Note:
1. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
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
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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
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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
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© 2013 Micrel, Incorporated.
April 8, 2013
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