MIC5367/8
High Performance 200mA Peak LDO
in 1.6mm x 1.6mm Thin MLF®
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
June 2010 M9999-060110-A
General Description
The MIC5367/8 is an advanced general purpose linear
regulator offering high power supply rejection (PSRR) in
an ultra-small 1.6mm x 1.6mm package. The MIC5368
includes an auto-discharge feature that is activated when
the enable pin is low. The MIC5367/8 is capable of
sourcing 200mA peak (150mA continous) output current
and offers high PSRR making it an ideal solution for any
portable electronic application.
Ideal for battery powered applications, the MIC5367/8
offers 2% initial accuracy, low dropout voltage (180mV @
150mA), and low ground current (typically 29µA). The
MIC5367/8 can also be put into a zero-off-mode current
state, drawing virtually no current when disabled.
The MIC5367/8 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.
Features
• Input voltage range: 2.5V to 5.5V
• 200mA peak (150mA continuous) output current
• Stable with 1µF ceramic output capacitors
• Low dropout voltage – 180mV @ 150mA
• Excellent Load/Line Transient Response
• Low quiescent current – 29µA
• High PSRR – 65dB
• Output discharge circuit – MIC5368
• High output accuracy
– ±2% initial accuracy
• Tiny 1.6mm x 1.6mm Thin MLF® package
• Thermal shutdown and current limit protection
Applications
• Mobile phones
• Digital cameras
• GPS, PDAs, PMP, handhelds
• Portable electronics
___________________________________________________________________________________________________________
Typical Application
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Block Diagram
MIC5367 Block Diagram
MIC5368 Block Diagram
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Ordering Information
Part Number(1) Marking
Code
Output
Voltage
Temperature Range Package(2) Lead Finish(3)
MIC5367-1.2YMT 674 1.2V –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® Pb-Free
MIC5367-1.5YMT F67 1.5V –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® Pb-Free
MIC5367-3.3YMT 67S 3.3V –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® Pb-Free
MIC5368-1.2YMT* 684 1.2V –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® Pb-Free
MIC5368-1.5YMT* F68 1.5V –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® Pb-Free
MIC5368-3.3YMT* 68S 3.3V –40°C to +125°C 6-Pin 1.6mm x 1.6mm Thin MLF® Pb-Free
Notes:
1. Other voltages available. Contact Micrel for details.
2. Thin MLF® = Pin 1 identifier.
3. Thin MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
* MIC5368 offers Auto-Discharge function.
Pin Configuration
6-Pin 1.6mm x 1.6mm Thin MLF® (MT)
Pin Description
Pin Number Pin Name Pin Function
1 EN Enable Input: Active High. High = ON; Low = OFF. Do not leave floating.
2 GND Ground.
3 VIN Supply Input.
4 VOUT Output Voltage.
5 NC No Connect (Not internally connected).
6 NC No Connect (Not internally connected).
EP HS Pad Exposed Heatsink Pad.
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Absolute Maximum Ratings(1)
Supply Voltage (VIN)............................................... 0V to 6V
Enable Voltage (VEN).............................................. 0V to VIN
Power Dissipation (PD)........................... Internally Limited(3)
Lead Temperature (soldering, 10sec)........................ 260°C
Junction Temperature (TJ) ........................–40°C to +150°C
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Rating(4).................................................................. 2kV
Operating Ratings(2)
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
1.6 x1.6 Thin MLF-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 Condition Min Typ Max Units
Variation from nominal VOUT –2.0 +2.0 % Output Voltage Accuracy
Variation from nominal VOUT; –40°C to +125°C –3.0 +3.0 %
Line Regulation VIN = VOUT +1V to 5.5V; IOUT = 100µA 0.02 0.3 %
Load Regulation(6) I
OUT = 100µA to 150mA 0.3 1 %
Dropout Voltage(7) I
OUT = 50mA
IOUT = 150mA
60
180
135
380
mV
mV
Ground Pin Current(8) I
OUT = 0mA 29 39 µA
Ground Pin Current in Shutdown VEN 0.2V 0.05 1 µA
Ripple Rejection f = up to 1kHz; COUT = 1µF
f = 1kHz – 10kHz; COUT = 1µF
65
55
dB
dB
Current Limit VOUT = 0V 200 325 550 mA
Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 200 µVRMS
Auto-Discharge NFET
Resistance
MIC5368 Only; VEN = 0V; VIN = 3.6V; IOUT = –3mA 30
Enable Input
Logic Low 0.2 V Enable Input Voltage
Logic High 1.2 V
VIL 0.2V 0.01 1 µA Enable Input Current
VIH 1.2V 0.01 1 µA
Turn-on Time COUT = 1µF; IOUT = 150mA 50 125 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 recommended. Human body model, 1.5k 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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Typical Characteristics
Output Noise
Spectral Density
0.001
0.01
0.1
1
10
10 100 1000 10000 100000 1000000
FREQUENCY (Hz)
NOISE uV/√Hz
V
IN
= V
EN
=4.1V
V
OUT
= 1.5V
C
OUT
= 1µF
I
OUT
= 150mA
Noise(10Hz to 100Khz)=136µVrms
Dropout Voltage
vs. Output Current
0
20
40
60
80
100
120
140
160
0 25 50 75 100 125 150
OUTPUT CURRENT (mA)
DROPOUT VOLTAGE (mV
)
V
OUT
= 3.3V
C
IN
= C
OUT
= 1µF
Ground Current
vs. Load current
28
30
32
34
36
38
40
0 20406080100120140
LOAD CURRENT (mA)
GROUND CURRENT ( µA)
VEN = VIN = VOUT + 1V
VOUT = 3.3V
CIN = COUT = 1µF
Dropout Voltage
vs. Temperature
0
20
40
60
80
100
120
140
160
180
200
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
DROPOUT VOLTAGE (mV
)
C
IN
= C
OUT
= 1µF
V
OUT
= 3.3V 150mA
100mA
50mA
10mA
Ground Current
vs. Temperature
20
22
24
26
28
30
32
34
36
38
40
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
GROUND CURRENT (µA)
V
EN
= V
IN
= V
OUT
+ 1V
V
OUT
= 3.3V
C
IN
= C
OUT
= 1µF
150mA
100µA
50mA
100mA
Output Voltage
vs. Load Current
3.100
3.150
3.200
3.250
3.300
3.350
3.400
3.450
3.500
0 20 40 60 80 100 120 140 160
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
V
IN
= V
EN
= V
OUT
+ 1V
V
OUT
= 3.3V
C
IN
= C
OUT
= 1µF
C
OUT
= 1µF/10V
Output Voltage
vs. Supply Voltage
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
50mA
150mA
1mA
V
IN
= V
IN
V
OUT
= 3.3V
C
IN
= C
OUT
= 1µF
Output Voltage
vs. Temperature
3.0
3.1
3.2
3.3
3.4
3.5
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
V
IN
= V
OUT
+ 13V
V
OUT
= 3.3V
C
IN
= C
OUT
= 1µF
I
OUT
= 150mA
Current Limit
vs. Supply Voltage
200
250
300
350
400
33.544.555.5
SUPPLY VOLTAGE (V)
CURRENT LIMIT (mA)
V
OUT
= 3.3V
C
IN
= C
OUT
= 1µF
Power Supply
Rejection Ratio
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1000 10000 100000 1000000
FREQUENCY(Hz)
dB
VIN = 4.35V
VOUT = 3.3V
COUT = 1µF
75mA
150mA
100µA
Ground Current
vs. Supply Voltage
20
22
24
26
28
30
32
34
36
38
2.533.544.555.5
SUPPLY VOLTAGE (V)
GROUND CURRENT (µA)
150mA
100µA
VEN = VIN
VOUT = 3.3V
CIN = COUT = 1µF
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Functional Characteristics
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Application Information
MIC5367 and MIC5368 are Low noise 150mA LDOs.
The MIC5368 includes an auto-discharge circuit that is
switched on when the regulator is disabled through the
Enable pin. The MIC5367/8 regulator is fully protected
from damage due to fault conditions, offering linear
current limiting and thermal shutdown.
Input Capacitor
The MIC5367/8 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.
Output Capacitor
The MIC5367/8 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.
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.
No-Load Stability
Unlike many other voltage regulators, the MIC5367/8 will
remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
Enable/Shutdown
The MIC5367/8 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 a
“zero” off-mode-current state. In this state, current
consumed by the regulator goes nearly to zero. Forcing
the enable pin high enables the output voltage. The
active-high 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.
Thermal Considerations
The MIC5367/8 is designed to provide 150mA 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 3.3V, the output
voltage is 1.5V, and the output current = 150mA. The
actual power dissipation of the regulator circuit can be
determined using the equation:
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 this calculation.
P
D = (3.3V – 1.5V) × 150mA
P
D = 0.27W
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛−
=
JA
AJ(max)
D(max)
TT
P
θ
TJ(max) = 125°C, the maximum junction temperature of the
die, JA thermal resistance = 92.4°C/W for the YMT
package.
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit. The junction-to-
ambient thermal resistance for the minimum footprint is
92.4°C/W.
The maximum power dissipation must not be exceeded
for proper operation.
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For example, when operating the MIC5367-1.5YMT at
an input voltage of 3.3V and 150mA load with a
minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
0.27W = (125°C – TA)/(92.4°C/W)
T
A = 100°C
Therefore the maximum ambient operating temperature
of 100°C is allowed in a 1.6mm x 1.6mm Thin MLF®
package. 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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Bill of Materials
Item Part Number Manufacturer Description Qty.
C1, C2 GRM155R61A105KE15D Murata(1) Capacitor, 1µF Ceramic, 10V, X7R, Size 0402 2
U1 MIC5367/8-xxYMT Micrel, Inc.(2) High Performance Single 150mA LDO in 1.6x1.6 Thin MLF® 1
Notes:
1. Murata: www.murata.com
2. Micrel, Inc.: www.micrel.com
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PCB Layout Recommendations (1.6mm x 1.6mm Thin MLF®)
Top Layer
Bottom Layer
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Package Information
6-Pin 1.6mm x 1.6mm Thin MLF® (MT)
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.
© 2010 Micrel, Incorporated.
