MIC94305 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 500mA Switch with Ripple Blocker™ Technology

MIC94305
500mA Switch
with Ripple Blocker™ Technology
General Description
Features
The MIC94305 is an integrated load switch that
incorporates Micrel’s Ripple Blocker active filter
technology. The MIC94305 provides high-frequency ripple
attenuation (switching noise rejection) for applications
where switching noise cannot be tolerated by sensitive
downstream circuits, such as RF applications. A low-
voltage logic enable pin disconnects the pass element and
puts the MIC94305 in a low current-shutdown state when
disabled.
The MIC94305 operates from an input voltage of 1.8V to
3.6V, allowing true load switching of low-voltage power
rails in any electronic device. The output voltage (V_OUT) is
set at a fixed drop (typically 170mV) from the input voltage
(V_OUT = V_IN – 170mV). This maintains high efficiency
independent of given load conditions and currents.
The MIC94305 is packaged in a 6-ball 0.84mm x 1.32mm
CSP package, or 6-pin 1.6mm x 1.6mm Thin DFN
package, and 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
− >60dB from 40kHz to 5MHz
• Rated to 500mA output current
• Current-limit and thermal-limit protected
• Ultra-small 0.84mm x 1.32mm, 6-ball CSP
• 1.6mm x 1.6mm, 6-pin Thin DFN
• 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
• Videoconferencing
• Bar-code scanners
• Global positioning systems
• Automotive and industrial applications
_________________________________________________________________________________________________
Typical Application
PSRR C_OUT = 4.7µF
0
-10
-20
500mA
-30
-40
300mA
-50
-60
-70
-80
1100
V_IN = 2.5V + 40mVpp
10mA
110000 1,010K0 101,000K0 10100,00K0 1,0010M,0 101,00M00,
0
00 000
FREQUENCY (Hz)
Ripple Blocker is a trademark of Micrel, Inc
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
September 2012
M9999-091312-A