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PDF MIC94310 Data sheet ( Hoja de datos )
| Número de pieza | MIC94310 | |
| Descripción | 200mA LDO | |
| Fabricantes | Micrel Semiconductor | |
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MIC94310
200mA LDO with
Ripple Blocker™ Technology
General Description
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.
The MIC94310 operates from an input voltage of 1.8V to
3.6V.
Packaged in a 0.88mm × 0.88mm 4-ball WLCSP, a 4-pin
1.2mm × 1.6mm Thin DFN, or a 5-pin SOT-23, the
MIC94310 has a junction operating temperature range of
–40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• 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 × 0.88mm 4-ball WLCSP
• 1.2mm × 1.6mm 4-pin Thin DFN
• 5-pin SOT-23
• Logic-controlled enable pin
− −40°C to +125°C junction temperature range
Applications
• Smartphones/Smart books
• 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 IOUT = 200mA
IOUT = 100mA
-60
-80
-100
VIN = 2.5V + 40mVpp
-120
IOUT = 10mA
VOUT = 1.8V
1.E1+001 1.E10+002 1.E1+K03 1.E10+K04 1.1E0+0K05 1.E1+M06 1.1E0+M07
FREQUENCY (Hz)
Ripple Blocker is a trademark of Micrel, 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
September 11, 2014
Revision 2.1
1 page  
Micrel, Inc.
MIC94310
Absolute Maximum Ratings(3)
Input Voltage (VIN) ...........................................–0.3 to +4.0V
Output Voltage (VOUT) ................. –0.3 to VIN+0.3V or +4.0V
Enable Voltage (VEN)................... –0.3 to VIN+0.3V or +4.0V
Lead Temperature (soldering, 10s)............................ 260°C
Storage Temperature (Ts).........................–65°C to +150°C
ESD Rating(5).................................................................. 3kV
Operating Ratings(4)
Supply Voltage (VIN) ..................................... +1.8V to +3.6V
Enable Voltage (VEN).............................................. 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
TDFN (θJA) .......................................................173°C/W
WLCSP (θJA) ....................................................250°C/W
SOT-23 (θJA) ....................................................120°C/W
Electrical Characteristics(6)
VIN = VEN = VOUT + 500mV (VIN = VEN = 3.6V for VOUT ≥ 3.1V); IOUT = 1mA; COUT = 1µF (YCS, YMT), COUT = 10µF (YM5); TA = 25°C,
bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Parameter
Condition
Min. Typ. Max. Units
Input Voltage
1.8 3.6 V
Output Voltage Accuracy
Dropout Voltage
Load Regulation
Variation from nominal VOUT
VIN to VOUT dropout at 100mA output current
VIN to VOUT dropout at 200mA output current
1mA to 100mA
–3 ±1 +3 %
20 50 mV
40 100 mV
4 mV
Line Regulation
Ground Current
VIN = VOUT + 500mV to 3.6V
No load to full load
0.01 0.5
170 250
%
µA
Shutdown Current
VIN Ripple Rejection
Current Limit
Total Output Noise
Turn-on Time
Enable
VEN = 0V
f = 100Hz, IOUT = 100mA
f = 100kHz, IOUT = 100mA
f = 1MHz, IOUT = 100mA
f = 10MHz, IOUT = 100mA
VOUT = 0V
10Hz to 100kHz
0.2
85
68
57
50
250 400
83
70
5 µA
dB
dB
dB
dB
700 mA
μVRMS
μs
Input Logic Level
0.4 V
Input Logic High
1.0 V
Input Current
0.01 1
µA
Notes:
3. Exceeding the absolute maximum ratings may damage the device.
4. The device is not guaranteed to function outside its operating ratings.
5. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
6. Specification for packaged product only.
September 11, 2014
5
Revision 2.1
5 Page 
Micrel, Inc.
Evaluation Board Schematic
MIC94310
Bill of Materials
Item
Part Number
C1, C2 GRM155R61A105KE15D
U1 MIC94310-xxYMT
Notes:
7. Murata: www.murata.com.
8. Micrel, Inc.: www.micrel.com.
Manufacturer
Murata(7)
Micrel, Inc.(8)
Description
Capacitor, 1µF Ceramic, 10V, X7R, Size 0402
200mA LDO with Ripple Blocker Technology
Qty.
2
1
September 11, 2014
11
Revision 2.1
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MIC94310.PDF ] | |
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