Micrel MIC94310-JYMT 200ma ldo with ripple blockerâ ¢ technology Datasheet

MIC94310
200mA LDO with
Ripple Blocker™ Technology
General Description
Features
The MIC94310 Ripple Blocker™ is a monolithic integrated
circuit that provides low-frequency ripple attenuation
(switching noise rejection) to a regulated output voltage.
This is important for applications where a DC/DC switching
converter is required to lower or raise a battery voltage but
where switching noise cannot be tolerated by sensitive
downstream circuits such as in RF applications. The
MIC94310 maintains high power supply ripple rejection
(PSRR) with input voltages operating near the output
voltage level to improve overall system efficiency. A lowvoltage logic enable pin facilitates ON/OFF control at
typical GPIO voltage levels.
The MIC94310 operates from an input voltage of 1.8V to
3.6V.
Packaged in a 0.88mm x 0.88mm 4-ball CSP or a 4-pin
®
1.2mm x 1.6mm Thin MLF , the MIC94310 has a junction
operating 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.
• 1.8V to 3.6V input voltage range
• Active noise rejection over a wide frequency band
− >50dB from 10Hz to 10MHz at 200mA load
• Rated to 200mA output current
• Fixed output voltages
• Current-limit and thermal-limit protected
• Ultra-small 0.88mm x 0.88mm 4-ball CSP
• 1.2mm x 1.6mm, 4-pin Thin MLF®
• Logic-controlled enable pin
• −40°C to +125°C junction temperature range
Applications
• Smart phones
• Tablet PC/notebooks and webcams
• Digital still and video cameras
• Global positioning systems
• Mobile computing
• Automotive and industrial applications
_________________________________________________________________________________________________
Typical Application
PSRR COUT = 1µF
0
PSRR (dB)
-20
-40
-60
IOUT = 200mA
IOUT = 100mA
-80
-100
VIN = 2.5V + 40mVpp
IOUT = 10mA
VOUT = 1.8V
-120
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
FREQUENCY (Hz)
Ripple Blocker is a trademark of Micrel, Inc
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
February 2012
M9999-020612-A
Micrel, Inc.
MIC94310
Ordering Information
Part Number
Marking Code
Output Voltage
Package2,3
Lead Finish
1Z
1.2V
0.88mm x 0.88mm CSP
Pb-Free
MIC94310-4YCS
MIC94310-FYCS
2Z
1.5V
0.88mm x 0.88mm CSP
Pb-Free
MIC94310-GYCS1
Z9
1.8V
0.88mm x 0.88mm CSP
Pb-Free
1
Z8
1.85V
0.88mm x 0.88mm CSP
Pb-Free
Z7
2.5V
0.88mm x 0.88mm CSP
Pb-Free
MIC94310-DYCS
MIC94310-JYCS
1
1
Z6
2.8V
0.88mm x 0.88mm CSP
Pb-Free
MIC94310-NYCS1
Z5
2.85V
0.88mm x 0.88mm CSP
Pb-Free
MIC94310-PYCS
Z4
3.0V
0.88mm x 0.88mm CSP
Pb-Free
MIC94310-SYCS
Z3
3.3V
0.88mm x 0.88mm CSP
Pb-Free
MIC94310-4YMT
31T
1.2V
1.2mm x 1.6mm Thin MLF®
Pb-Free
1.5V
1.2mm x 1.6mm Thin MLF
®
Pb-Free
1.2mm x 1.6mm Thin MLF
®
Pb-Free
®
Pb-Free
MIC94310-MYCS
32T
MIC94310-FYMT
31G
MIC94310-GYMT
MIC94310-DYMT
1
MIC94310-JYMT1
MIC94310-MYMT
MIC94310-NYMT
1
1
MIC94310-PYMT
MIC94310-SYMT
1.8V
31D
1.85V
1.2mm x 1.6mm Thin MLF
31J
2.5V
1.2mm x 1.6mm Thin MLF®
Pb-Free
2.8V
1.2mm x 1.6mm Thin MLF
®
Pb-Free
®
Pb-Free
31M
31N
2.85V
1.2mm x 1.6mm Thin MLF
31P
3.0V
1.2mm x 1.6mm Thin MLF®
Pb-Free
3.3V
®
Pb-Free
31S
1.2mm x 1.6mm Thin MLF
Notes:
1.
Contact Micrel Marketing for availability.
2.
Thin MLF ▲ = Pin 1 identifier.
3.
Thin MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
®
February 2012
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M9999-020612-A
Micrel, Inc.
MIC94310
Pin Configuration
4-Pin 1.2mm × 1.6mm Thin MLF® (MT)
Top View
4-Ball 0.88mm × 0.88mm CSP (CS)
Top View
Pin Description
Pin Number
(Thin MLF®)
Ball Number
(CSP)
Pin Name
1
A2
VOUT
Power switch output.
2
B2
GND
Ground.
3
B1
EN
Enable input. A logic HIGH signal on this pin enables the part. Logic LOW
disables the part. Do not leave floating.
4
A1
VIN
Power switch input and chip supply.
EP
–
ePad
February 2012
Pin Name
Exposed Heatsink Pad. Connect to Ground for best thermal performance.
3
M9999-020612-A
Micrel, Inc.
MIC94310
Functional Block Diagram
February 2012
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M9999-020612-A
Micrel, Inc.
MIC94310
Absolute Maximum Ratings(1)
Operating Ratings(2)
Input Voltage (VIN) .............................................. -0.3 to +4V
Output Voltage (VOUT) .................... –0.3 to VIN+0.3V or +4V
Enable Voltage (VEN)...................... –0.3 to VIN+0.3V or +4V
Lead Temperature (soldering, 10s)............................ 260°C
Storage Temperature (Ts).........................–65°C to +150°C
ESD Rating(3) .................................................................. 3kV
Input Voltage (VIN)........................................ +1.8V to +3.6V
Enable Voltage (VEN).............................................. 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
Thin MLF® (θJA)................................................173°C/W
CSP (θJA) .........................................................250°C/W
Electrical Characteristics(4)
VIN = VEN = VOUT + 500mV (VIN = VEN = 3.6V for VOUT ≥ 3.1V); IOUT = 1mA; COUT = 1µF; TA = 25°C,
bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Parameter
Condition
Min.
Max.
Units
3.6
V
±1
+3
%
VIN to VOUT dropout at 100mA output current
20
50
VIN to VOUT dropout at 200mA output current
40
100
Load Regulation
1mA to 100mA
4
Line Regulation
VIN = VOUT + 500mV to 3.6V
0.01
0.5
%
Ground Current
No load to full load
170
250
µA
Shutdown Current
VEN = 0V
0.2
5
µA
f = 100Hz, IOUT = 100mA
85
f = 100kHz, IOUT = 100mA
68
f = 1MHz, IOUT = 100mA
57
f = 10MHz, IOUT = 100mA
50
1.8
Input Voltage
Output Voltage Accuracy
Dropout Voltage
VIN Ripple Rejection
Typ.
–3
Variation from nominal VOUT
Current Limit
VOUT = 0V
Total Output Noise
10Hz to 100kHz
250
Turn-On Time
400
mV
mV
dB
700
mA
83
μVRMS
70
μs
Enable
0.4
Input Logic Low
1.0
Input Logic High
Input Current
V
V
0.01
1
µA
Notes:
1.
Exceeding the absolute maximum rating may damage the device.
2.
The device is not guaranteed to function outside its operating rating.
3.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4.
Specification for packaged product only.
February 2012
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M9999-020612-A
Micrel, Inc.
MIC94310
Typical Characteristics
PSRR COUT = 0.47µF
0
-20
-20
IOUT = 200mA
-80
-100
IOUT = 10mA
-60
VIN = 3.6V
-80
VIN = 2.0V
PSRR (dB)
PSRR (dB)
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
VOUT = 1.8V
-80
-60
IOUT = 10mA
FREQUENCY (Hz)
-20
IOUT = 100mA
-80
VIN = 3.6V
-100
PSRR COUT = 2.2µF
-20
-60
VIN = 2.5V + 40mVpp
VOUT = 1.8V
-100
VIN = 2.5V + 40mVpp
VOUT = 1.8V
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
0
IOUT = 200mA
IOUT = 100mA
-100
0
-40
IOUT = 200mA
-80
PSRR COUT = 2.2µF
0
VIN = 2.5V
-40
FREQUENCY (Hz)
PSRR COUT = 1µF
-60
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
VOUT = 1.8V
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
FREQUENCY (Hz)
-40
VIN = 2.5V
-40
-100
VIN = 2.5V + 40mVpp
VOUT = 1.8V
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
-20
-20
VIN = 2.0V
IOUT = 100mA
-60
0
PSRR (dB)
-40
PSRR COUT = 1µF
PSRR (dB)
0
PSRR (dB)
PSRR (dB)
PSRR COUT = 0.47µF
-40
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
VOUT = 1.8V
VIN = 2.0V
VIN = 2.5V
-60
-80
VIN = 3.6V
-100
IOUT = 10mA
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR COUT = 4.7µF
PSRR COUT = 10µF
0
0
-20
PSRR (dB)
IOUT = 200mA
IOUT = 100mA
-60
-80
-100
IOUT = 10mA
VIN = 2.5V + 40mVpp
VOUT = 1.8V
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
FREQUENCY (Hz)
February 2012
-40
-60
-80
-100
-20
VIN = 2.0V
VIN = 2.5V
PSRR (dB)
-20
PSRR (dB)
FREQUENCY (Hz)
PSRR COUT = 4.7µF
0
-40
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
VIN = 3.6V
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
VOUT = 1.8V
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
FREQUENCY (Hz)
6
-40
IOUT = 200mA
IOUT = 100mA
-60
-80
-100
IOUT = 10mA
VIN = 2.5V + 40mVpp
VOUT = 1.8V
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
FREQUENCY (Hz)
M9999-020612-A
Micrel, Inc.
MIC94310
Typical Characteristics (Continued)
PSRR COUT = 10µF
PSRR (Varying COUT)
0
0
0
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
VOUT = 1.8V
COUT = 0.47µF
-20
VIN = 2.0V
-60
-80
-40
-60
-80
VIN = 3.6V
-40
VIN = 2.5V + 40mVpp
LOAD = 100mA
VOUT = 1.8V
-100
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
-120
1.E+01
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
FREQUENCY (Hz)
-80
1.900
30
1.875
OUTPUT VOLTAGE (V)
35
25
20
15
10
5
0
-120
10 1.E+02
100 1.E+03
1K 1.E+04
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
FREQUENCY (Hz)
Output Voltage
vs. Input Voltage
2.00
1.95
1.850
1.825
1.800
1.775
1.750
VIN = 3.6V
100
125
150
175
20
OUTPUT CURRENT (mA)
Output Noise Spectral Density
GROUND CURRENT (μA)
1.00
V IN = VEN = 3.1V
CIN = COUT = 1µF
V OUT = 1.8V
NOISE (10Hz to 100kHz)
= 82.55µVRMS
100
1.E+02
1k
1.E+03
10k
1.E+04
FREQUENCY (Hz)
February 2012
40
60
1.75
IOUT = 200mA
1.70
80 100 120 140 160 180 200
2
2.2
170
165
160
155
VIN =2.8V
2.4
2.6
2.8
3
3.2
3.4
3.6
INPUT VOLTAGE (V)
Ground Current
vs. Output Current
175
0.01
10
1.E+01
1.80
OUTPUT CURRENT (mA)
10.00
0.10
1.85
1.60
0
200
Ground Current
vs. Input Voltage
190
GROUND CURRENT (μA)
75
1.90
1.65
CIN = COUT = 1µF
1.700
50
V IN = 2.5V + 40mVpp
LOAD = 100mA
V OUT = 1.8V
-100
Output Voltage
vs. Output Current
1.725
25
COUT = 4.7µF
FREQUENCY (Hz)
Dropout Voltage
vs. Output Current
0
COUT = 10µF
-60
COUT = 2.2µF
-100
DROPOUT VOLTAGE (mV)
COUT = 2.2µF
PSRR (dB)
VIN = 2.5V
PSRR (dB)
PSRR (dB)
-40
-20
COUT = 1µF
OUTPUT VOLTAGE (V)
-20
Noise µV/√Hz
PSRR (Varying COUT)
180
IOUT = 200mA
170
160
IOUT = 100mA
150
140
CIN = COUT =1µF
130
CIN = COUT =1µF
100k
1.E+05
1M
1.E+06
150
120
0
20
40
60
80
100 120 140 160 180 200
OUTPUT CURRENT (mA)
7
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
INPUT VOLTAGE (V)
M9999-020612-A
Micrel, Inc.
MIC94310
Functional Characteristics
February 2012
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M9999-020612-A
Micrel, Inc.
MIC94310
Application Information
Enable/Shutdown
Forcing the enable (EN) pin low disables the MIC94310
and sends it into a “zero” off mode current state. In this
state, current consumed by the MIC94310 goes nearly to
zero. Forcing EN high enables the output voltage. The
EN pin uses CMOS technology and cannot be left
floating as it could cause an indeterminate state on the
output.
The MIC94310 is a very-high PSRR, fixed-output,
200mA LDO utilizing Ripple Blocker™ technology. The
MIC94310 is fully protected from damage due to fault
conditions, offering linear current limiting and thermal
shutdown.
Input Capacitor
The MIC94310 is a high-performance, high-bandwidth
device. An input capacitor of 0.47µF 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.
Thermal Considerations
The MIC94310 is designed to provide 200mA 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 2.5V, the output
voltage is 1.8V, and the output current = 200mA. The
actual power dissipation of the Ripple Blocker™ can be
determined using the equation:
Output Capacitor
In order to maintain stability, the MIC94310 requires an
output capacitor of 0.47µF or greater. For optimal ripple
rejection performance a 1µF capacitor is recommended.
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 their value by as much
as 50% and 60%, respectively, over their operating
temperature ranges. To use a ceramic chip capacitor
with the 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.
PD = (VIN – VOUT1) I OUT + VIN IGND
Because this device is CMOS and the ground current is
typically <170µA over the load range, the power
dissipation contributed by the ground current is <1% and
can be ignored for this calculation.
PD = (2.5V – 1.8V) × 200mA
PD = 0.14W
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:
⎛ TJ(max) − TA
PD(MAX) = ⎜⎜
θ JA
⎝
TJ(max) = 125°C, the maximum junction temperature of the
die, θJA thermal resistance = 173°C/W for the Thin MLF®
package.
No Load Stability
The MIC94310 will remain stable and in regulation with
no load. This is especially important in CMOS RAM
keep-alive applications.
February 2012
⎞
⎟
⎟
⎠
Substituting PD for PD(MAX) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit.
The maximum power dissipation must not be exceeded
for proper operation.
9
M9999-020612-A
Micrel, Inc.
MIC94310
For example, when operating the MIC94310-GYMT at
an input voltage of 2.5V and 200mA load with a
minimum footprint layout, the maximum ambient
operating temperature TA can be determined as follows:
0.14W = (125°C – TA)/(173°C/W)
TA = 101°C
Therefore, the maximum ambient operating temperature
allowed in a 1.2mm x 1.6mm Thin MLF® package is
101°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 LowDropout Voltage Regulators handbook. This information
can be found on Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
For more information about Micrel’s Ripple Blocker™
products, go to:
http://www.micrel.com/rippleblocker/
http://www.micrel.com/page.do?page=/productinfo/products/mic94300.jsp
http://www.micrel.com/page.do?page=/productinfo/products/mic94310.jsp
February 2012
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M9999-020612-A
Micrel, Inc.
MIC94310
Evaluation Board Schematic
Bill of Materials
Item
C1, C2
U1
Part Number
GRM155R61A105KE15D
MIC94310xx-YMT
Manufacturer
(1)
Murata
Micrel, Inc.
(2)
Description
Qty.
Capacitor, 1µF Ceramic, 10V, X7R, Size 0402
2
200mA Ripple Blocker™ with Fixed Output Voltage
1
Notes:
1. Murata Tel: www.murata.com.
2. Micrel, Inc.: www.micrel.com.
February 2012
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M9999-020612-A
Micrel, Inc.
MIC94310
Package Information1
4-Ball 0.88mm × 0.88mm WL-CSP (CS)
Note:
1.
Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
February 2012
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M9999-020612-A
Micrel, Inc.
MIC94310
Package Information1 (Continued)
4-Pin 1.2mm × 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
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.
© 2012 Micrel, Incorporated.
February 2012
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M9999-020612-A
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