MIC94310-NYMT [MICREL]
200mA LDO with Ripple Blocker? Technology; 200毫安LDO纹波与拦截™技术型号: | MIC94310-NYMT |
厂家: | MICREL SEMICONDUCTOR |
描述: | 200mA LDO with Ripple Blocker? Technology |
文件: | 总13页 (文件大小:1096K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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 low-
voltage logic enable pin facilitates ON/OFF control at
typical GPIO voltage levels.
• 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
The MIC94310 operates from an input voltage of 1.8V to
3.6V.
Applications
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.
• 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
-20
-40
-60
IOUT = 200mA
IOUT = 100mA
-80
-100
-120
VIN = 2.5V + 40mVpp
VOUT = 1.8V
IOUT = 10mA
10
100
1K
10K
100K
1M
10M
11111
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
M9999-020612-A
February 2012
Micrel, Inc.
MIC94310
Ordering Information
Part Number
Marking Code
Output Voltage
1.2V
Package2,3
Lead Finish
MIC94310-4YCS
MIC94310-FYCS
MIC94310-GYCS1
MIC94310-DYCS1
MIC94310-JYCS1
MIC94310-MYCS1
MIC94310-NYCS1
MIC94310-PYCS
MIC94310-SYCS
MIC94310-4YMT
MIC94310-FYMT
MIC94310-GYMT
MIC94310-DYMT1
MIC94310-JYMT1
MIC94310-MYMT1
MIC94310-NYMT1
MIC94310-PYMT
MIC94310-SYMT
Notes:
1Z
2Z
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
0.88mm x 0.88mm CSP
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
1.2mm x 1.6mm Thin MLF®
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
1.5V
Z9
1.8V
Z8
1.85V
2.5V
Z7
Z6
2.8V
Z5
2.85V
3.0V
Z4
Z3
3.3V
31T
32T
31G
31D
31J
31M
31N
31P
31S
1.2V
1.5V
1.8V
1.85V
2.5V
2.8V
2.85V
3.0V
3.3V
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.
M9999-020612-A
February 2012
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Micrel, Inc.
MIC94310
Pin Configuration
4-Ball 0.88mm × 0.88mm CSP (CS)
Top View
4-Pin 1.2mm × 1.6mm Thin MLF® (MT)
Top View
Pin Description
Pin Number
(Thin MLF®)
Ball Number
(CSP)
Pin Name
Pin Name
1
2
A2
B2
VOUT
GND
Power switch output.
Ground.
Enable input. A logic HIGH signal on this pin enables the part. Logic LOW
disables the part. Do not leave floating.
3
B1
EN
4
A1
–
VIN
Power switch input and chip supply.
EP
ePad
Exposed Heatsink Pad. Connect to Ground for best thermal performance.
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February 2012
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Micrel, Inc.
MIC94310
Functional Block Diagram
M9999-020612-A
February 2012
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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.
1.8
–3
Typ.
Max.
3.6
+3
Units
V
Input Voltage
Output Voltage Accuracy
Variation from nominal VOUT
VIN to VOUT dropout at 100mA output current
VIN to VOUT dropout at 200mA output current
1mA to 100mA
±1
20
%
50
Dropout Voltage
mV
40
100
Load Regulation
Line Regulation
Ground Current
Shutdown Current
4
mV
%
VIN = VOUT + 500mV to 3.6V
No load to full load
0.01
170
0.2
85
0.5
250
5
µA
µA
VEN = 0V
f = 100Hz, IOUT = 100mA
f = 100kHz, IOUT = 100mA
f = 1MHz, IOUT = 100mA
f = 10MHz, IOUT = 100mA
68
VIN Ripple Rejection
dB
57
50
Current Limit
VOUT = 0V
250
400
83
700
mA
μVRMS
μs
Total Output Noise
Turn-On Time
Enable
10Hz to 100kHz
70
Input Logic Low
Input Logic High
Input Current
Notes:
0.4
V
V
1.0
0.01
1
µA
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.
M9999-020612-A
February 2012
5
Micrel, Inc.
MIC94310
Typical Characteristics
PSRR COUT = 0.47µF
PSRR COUT = 1µF
PSRR COUT = 0.47µF
0
0
-20
0
-20
-20
VIN = 2.0V
VIN = 2.5V
IOUT = 100mA
IOUT = 200mA
-40
-60
-40
-40
IOUT = 200mA
IOUT = 100mA
-60
-60
VIN = 3.6V
-80
-80
-80
-100
-120
-100
-120
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
-100
-120
VIN = 2.5V + 40mVpp
OUT = 1.8V
VIN = 2.5V + 40mVpp
OUT = 1.8V
V
V
IOUT = 10mA
IOUT = 10mA
VOUT = 1.8V
1111111
10 100 1K 10K 100K 1M 10M
1111111
10 100 1K 10K 100K 1M 10M
1111111
10 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR COUT = 1µF
PSRR COUT = 2.2µF
PSRR COUT = 2.2µF
0
-20
0
-20
0
-20
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
VOUT = 1.8V
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
OUT = 1.8V
V
VIN = 2.0V
VIN = 2.0V
VIN = 2.5V
IOUT = 200mA
IOUT = 100mA
-40
-40
-40
VIN = 2.5V
-60
-60
-60
-80
-80
-80
VIN = 3.6V
VIN = 3.6V
VIN = 2.5V + 40mVpp
OUT = 1.8V
V
-100
-120
-100
-120
-100
-120
IOUT = 10mA
1111111
1111111
10 100 1K 10K 100K 1M 10M
1111111
10 100 1K 10K 100K 1M 10M
10
100
1K
10K
100K
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR COUT = 4.7µF
PSRR COUT = 4.7µF
PSRR COUT = 10µF
0
-20
0
-20
0
-20
VIN = 2.0V
IOUT = 200mA
IOUT = 100mA
VIN = 2.5V
-40
-40
-40
IOUT = 200mA
IOUT = 100mA
-60
-60
-60
-80
-80
-80
VIN = 3.6V
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
-100
-120
-100
-120
-100
-120
VIN = 2.5V + 40mVpp
OUT = 1.8V
VIN = 2.5V + 40mVpp
V
VOUT = 1.8V
IOUT = 10mA
VOUT = 1.8V
IOUT = 10mA
1111111
10 100 1K 10K 100K 1M 10M
11.11.1.1.1
10 100 1K 10K 100K 1M 10M
1111111
10 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
M9999-020612-A
February 2012
6
Micrel, Inc.
MIC94310
Typical Characteristics (Continued)
PSRR COUT = 10µF
PSRR (Varying COUT)
PSRR (Varying COUT
)
0
-20
0
-20
0
-20
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
COUT = 0.47µF
COUT = 1µF
VOUT = 1.8V
COUT = 2.2µF
COUT = 10µF
VIN = 2.0V
-40
-40
-40
VIN = 2.5V
-60
-60
-60
-80
-80
-80
COUT = 4.7µF
COUT = 2.2µF
VIN = 3.6V
VIN = 2.5V + 40mVpp
LOAD = 100mA
VIN = 2.5V + 40mVpp
LOAD = 100mA
-100
-100
-120
-100
VOUT = 1.8V
V
OUT = 1.8V
-120
-120
1111111
10 100 1K 10K 100K 1M 10M
1111111
10 100 1K 10K 100K 1M 10M
10
100
1K
10K
100K
1M
10M
111111
FREQUENCY (Hz)
Dropout Voltage
FREQUENCY (Hz)
FREQUENCY (Hz)
Output Voltage
vs. Output Current
Output Voltage
vs. Input Voltage
2.00
vs. Output Current
1.900
35
30
25
20
15
10
5
1.875
1.850
1.825
1.800
1.775
1.750
1.725
1.700
1.95
1.90
1.85
1.80
1.75
IOUT = 200mA
1.70
VIN = 3.6V
1.65
1.60
CIN = COUT = 1µF
0
0
25
50
75
100 125 150 175 200
0
20 40 60 80 100 120 140 160 180 200
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
Output Noise Spectral Density
Ground Current
vs. Output Current
Ground Current
vs. Input Voltage
10.00
1.00
0.10
0.01
175
170
165
160
155
190
180
170
160
150
140
130
120
IOUT = 200mA
IOUT = 100mA
VIN = VEN = 3.1V
C
IN = COUT = 1µF
OUT = 1.8V
V
CIN = COUT =1µF
NOISE (10Hz to 100kHz)
= 82.55µVRMS
VIN =2.8V
CIN = COUT =1µF
150
0
10
100
1k
10k
100k
1M
20 40 60 80 100 120 140 160 180 200
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
FREQUENCY (Hz)
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
M9999-020612-A
February 2012
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Micrel, Inc.
MIC94310
Functional Characteristics
M9999-020612-A
February 2012
8
Micrel, Inc.
MIC94310
Application Information
Enable/Shutdown
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.
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.
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
PD = (VIN – VOUT1) I OUT + VIN IGND
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.
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
X7R/X5R dielectric type ceramic capacitors are
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:
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.
T
− TA
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
J(max)
PD(MAX)
=
θJA
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.
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.
M9999-020612-A
February 2012
9
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 Low-
Dropout 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=/product-
info/products/mic94300.jsp
http://www.micrel.com/page.do?page=/product-
info/products/mic94310.jsp
M9999-020612-A
February 2012
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Micrel, Inc.
MIC94310
Evaluation Board Schematic
Bill of Materials
Item
Part Number
Manufacturer Description
Qty.
2
C1, C2 GRM155R61A105KE15D
Murata(1)
Capacitor, 1µF Ceramic, 10V, X7R, Size 0402
U1
MIC94310xx-YMT
Micrel, Inc.(2)
1
200mA Ripple Blocker™ with Fixed Output Voltage
Notes:
1. Murata Tel: www.murata.com.
2. Micrel, Inc.: www.micrel.com.
M9999-020612-A
February 2012
11
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.
M9999-020612-A
February 2012
12
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.
M9999-020612-A
February 2012
13
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