Ripple Blocker™ (MIC94300/
MIC94310) attenuates ripple voltage
in any power supply design.
• 80dB of PSRR at 1kHz
• 60dB of PSRR at 5MHz
Enable clean system power to increase
overall system performance.
• Higher RF transmission signal strength
• Increase dynamic signal integrity
Save space and cost when implementing
feature-rich system solutions.
• Over 63% smaller solution than discrete
alternatives
• 0.88mm x 0.88mm, 4 bump WLCSP
Ripple Bloc ker™ (MIC94300/MIC94310)
Micrel, Inc. is a leading global manufacturer
of High Performance Linear and Power
Solutions, Timing and Communications, and
LAN Solutions. The Company’s products
include advanced mixed-signal, analog, and
power semiconductors; high performance
communication, clock management, Ethernet
switch, and physical layer transceiver
ICs. Company customers include leading
manufacturers of enterprise, consumer,
industrial, mobile, telecommunications,
automotive, and computer products.
Corporation headquarters and state-of-
the-art wafer fabrication facilities are located
in San Jose, CA, with regional sales and
support offi ces and advanced technology
design centers situated throughout the
Americas, Europe, and Asia. In addition, the
Company maintains an extensive network of
distributors and reps worldwide.
www.micrel.com
Even electronics work better
when they have peace and quiet.
Ideal for use in:
• Medical imaging applications
• Tablet/PC/notebook computers
• Webcams, digital still and video cameras
• Security and surveillance cameras
• Videoconferencing
• Bar code scanners
• Smartphone cameras and RF power
• Global Positioning Systems (GPS)
• Automotive and industrial applications
For more information, contact your local Micrel
sales representative, or visit Micrel at: http://
www.micrel.com/index.php/en/products/power-
management-ics/ldos/linear-power-fi lters.html
R ealize Unmatc hed PSRR Perf ormance for
Noise-Sensitive Applications
MIC94300/MIC94310
1.800.944.0800 Tel
1.408.474.1000 Fax
www.micrel.com
MIC94300-102012
© 2012 Micrel, Inc. All rights reserved. Micrel is a registered trademark and RippleBlocker is a trademark
of Micrel, Inc. MLF is a registered trademark of Amkor Technology, Inc.
MIC94300/MIC94310 — Power Supply Output Noise Attenuators
Contact Micrel, Inc.
Corporate HQ 2180 Fortune Drive San Jose, CA 95131 USA +1 408 944 0800 +1 408 944 0970
Western USA 2180 Fortune Drive San Jose, CA 95131 USA +1 408 944 0800 +1 408 944 0970
Central USA 2425 N. Central Express Way, Suite 351 Richardson, TX 75080 USA +1 972 393 2533 +1 972 393 2370
Eastern USA 93 Branch Street Medford, NJ 08055 USA +1 609 654 0078 +1 609 654 0989
Latin America 2425 N. Central Express Way, Suite 351 Richardson, TX 75080 USA +1 972 393 2533 +1 972 393 2370
Hong Kong Unit 311, 3/F, Core Bldg. 1, #1 Science Park East Ave., Hong Kong Science Park Shatin, N.T., Hong Kong +852 2886 8839 +852 2886 8851
China Rm 601, Bldg B, Int’l Chamber of Commerce Mansion, Fuhua Rd 1 Futian Dist Shenzhen, P.R. China 518048 +86 755 8302 7618 +86 755 8302 7637
Japan Queens Tower 14F, 2-3-1, Minatomirai, Nishi-ku, Yokohama-shi Kanagawa 220-6014, Japan +81 45 224 6616 +81 45 224 6716
Korea 4F Manzo 2 Building, 198-47, Gungnae-dong, Bundang-ku, Seongnam-City Kyungki-do, 463-470, Korea +82 2 538 2380 +82 2 538 2381
Singapore/India 7500A Beach Road, #07-324 The Plaza Singapore 199591 +65 6291 1318 +65 6291 1332
Taiwan 4F, No. 43 Lane 188, Rueiguang Road, Nei-Hu District Taipei 11491 Taiwan, R.O.C +886 2 8751 0600 +886 2 8751 0746
UK/EMEA 1st Floor, 3 Lockside Place, Mill Lane, Newbury, Berks United Kingdom RG14 5QS +44 1635 524455 +44 1635 524466
France/Southern Europe Les Laurentides - Batiment Ontario, 3 Avenue du Quebec 91140 Villebon sur Yvette, France +33 0 1 6092 4190 +33 0 1 6092 4189
Location Address Telephone Fax
Key Features
• Ripple Blocker technology
• High frequency power supply rejection ratio
• Ultra-small integrated solution
Benefi ts
• Enables clean system power for higher overall system performance.
• Improves minimum detectable signal capturing for noise-sensitive
applications.
• Tiny integrated solution enables more usable board space to
implement feature-rich system solutions.
Typical Applications
The MIC94300 integrated load switch and MIC94310 DC-DC regulator incorporate Micrel’s Ripple Blocker™ active fi lter technology to provide high frequency
ripple attenuation (switching noise rejection) for applications where switching noise cannot be tolerated by sensitive downstream circuits.
The MIC94300/MIC94310 are rated at up to 200mA, and operate from an input voltage of 1.8V to 3.6V, allowing true load switching of low-voltage power rails
in any electronic device. The MIC94310 offers ultra-low dropout (20mV, typical). These products also include linear current limiting and thermal shutdown
to ensure full protection from damage due to fault conditions.
Packaged in a 0.88mm x 0.88 4-bump CSP or 4-pin 1.2mm x 1.6mm Thin MLF® package, these devices have a junction operating temperature range of
-40°C to +125°C.
DC/DC LOAD
MIC94310-xx-YMT
VIN VOUT
GND EN
4
2
1
3
C1
1µF/10V
C2
1µF/10V
PSRR COUT = 0.47µF
-120
-100
-80
-60
-40
-20
0
Frequency (Hz)
PSRR (dB)
I
OUT
= 10mA
I
OUT
= 200mA
I
OUT
= 100mA
10 100 1K 10K 100K 1M 10M
V
IN
= 2.5V + 40mVpp
Ordering Information
Part Package Lead Finish
MIC94300YCS 0.88mm x 0.88mm
WLCSP Pb-Free
MIC94300YMT (1 2) 1.2mm x 1.6mm
Thin MLF® Pb-Free
