MIC94300 200mA Switch with Ripple Blocker™ Technology General Description Features The MIC94300 is an integrated load switch that incorporates Micrel’s Ripple Blocker™ active filter technology. The MIC94300 provides high-frequency ripple attenuation (switching noise rejection) for applications where a switching noise cannot be tolerated by sensitive downstream circuits such as in RF applications. A lowvoltage logic enable pin disconnects the pass element and places the MIC94300 into a low current-shutdown state when disabled. The MIC94300 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 (VOUT) is set at a fixed drop (typically 170mV) from the input voltage (VOUT = VIN – 170mV). This maintains high efficiency independent of given load conditions and currents. Packaged in a 0.88mm x 0.88mm 4-ball CSP or 4-pin 1.2mm x 1.6mm Thin MLF® package, the MIC94300 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 200mA output current • 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 Videoconferencing Bar-code scanners Global positioning systems Automotive and industrial applications _________________________________________________________________________________________________ Typical Application PSRR COUT = 1µF 0 -10 -20 PSRR (dB) -30 VIN = 3.6V -40 -50 -60 VIN = 1.8V -70 VIN = 2.5V -80 -90 VIN = VIN(NOM) + 40mVpp LOAD = 100mA -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 10M 1.E+01 1.E+02 1.E+04 1.E+07 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 M9999-020312-A Micrel, Inc. MIC94300 Ordering Information Part Number MIC94300YCS MIC94300YMT 1,2 Marking Code Package Lead Finish AF 0.88mm × 0.88mm WLCSP Pb-Free ® Pb-Free 1.2mm × 1.6mm Thin MLF 43Z Notes: ® 1. Thin MLF ▲ = Pin 1 identifier. 2. Thin MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. ® Pin Configuration Top View Top View 4-Ball 0.88mm × 0.88mm CSP (CS) 4-Pin 1.2mm × 1.6mm Thin MLF® (MT) Pin Description Pin Number (Thin MLF®) Ball Number (CSP) Pin Name 1 B2 EN 2 B1 GND 3 A1 VOUT 4 A2 VIN EP − ePad February 2012 Pin Name Enable input. A logic HIGH signal on this pin enables the part. Logic LOW disables the output. Do not leave floating. Ground. Power switch output. Power switch input and chip supply. Exposed Heatsink Pad. Connect to Ground for best thermal performance. 2 M9999-020312-A Micrel, Inc. MIC94300 Functional Block Diagram February 2012 3 M9999-020312-A Micrel, Inc. MIC94300 Absolute Maximum Ratings(1) Operating Ratings(2) Input Voltage (VIN) ........................................... −0.3V to +4V Output Voltage (VOUT). .................................... −0.3V to +4V Enable Voltage (VEN)..................−0.3V 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 0.88mm x 0.88mm WLCSP (θJA) .....................250°C/W 1.2mm x 1.6mm Thin MLF® (θJA).....................173°C/W Electrical Characteristics(4) VIN = VEN = 3.6V; IOUT = 100µA; COUT = 1µF; TA = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted. Parameter Condition Min. Typ. 1.8 Input Voltage Voltage Drop VIN − VOUT, −40°C ≤ TJ ≤ +85°C 170 VIN Ripple Rejection f = 20kHz, IOUT = 100mA 45 (PSRR) f = 100kHz to 5MHz, IOUT = 100mA 60 Total Output Noise f = 10Hz to 100kHz 98 Current Limit VOUT = 0V Turn-On Time 200 Max. Units 3.6 V 250 mV dB µVRMS 315 400 mA EN controlled 40 150 µs Load Regulation 100µA to 100mA 10 Ground Current IOUT = 100µA 138 Shutdown Current VEN = 0V 0.2 mV 200 µA µA 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 4 M9999-020312-A Micrel, Inc. MIC94300 Typical Characteristics PSRR COUT = 0.47µF -10 -20 IOUT = 200mA -50 -60 -70 -20 IOUT = 10mA -50 -60 -90 VIN = 3.6V+40mVpp -60 -80 VIN = VIN(NOM) + 40mVpp LOAD = 100mA -90 0 -10 -20 -20 -30 VIN = 3.6V + 40mVpp PSRR COUT = 2.2µF 0 -10 VIN = 3.6V -50 VIN = 1.8V PSRR (dB) -20 -40 -30 -40 IOUT = 200mA IOUT = 100mA -50 -60 -70 -70 VIN = VIN(NOM) + 40mVpp LOAD = 100mA -90 -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 10M 1.E+01 1.E+02 1.E+04 1.E+07 -40 -60 -90 VIN = 3.6V + 40mVpp FREQUENCY (Hz) PSRR COUT = 4.7µF PSRR COUT = 10µF 0 0 -10 -10 -10 -20 -20 -20 -30 -30 IOUT = 200mA -50 -60 -70 -40 -50 -60 -70 IOUT = 10mA -80 VIN = 3.6V+40mVpp -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 FREQUENCY (Hz) February 2012 -80 -90 IOUT = 100mA -30 V IN = 1.8V VIN = 2.5V VIN = 3.6V VIN = VIN + 40mVpp LOAD = 100mA PSRR (dB) -40 PSRR (dB) 0 IOUT = 100mA VIN = 2.5V VIN = VIN(NOM) + 40mVpp LOAD = 100mA -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 FREQUENCY (Hz) PSRR COUT = 4.7µF VIN = 1.8V -80 -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 FREQUENCY (Hz) VIN = 3.6V -50 -70 IOUT = 10mA -80 VIN = 2.5V -80 -90 IOUT = 10mA FREQUENCY (Hz) PSRR COUT = 2.2µF -10 IOUT = 200mA IOUT = 100mA -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 0 -30 PSRR (dB) -50 FREQUENCY (Hz) PSRR COUT = 1µF PSRR (dB) -40 -70 VIN = 2.5V -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 FREQUENCY (Hz) -90 VIN = 1.8V -80 -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 -60 -30 VIN = 3.6V -40 -70 -80 -90 -20 PSRR (dB) IOUT = 100mA 0 -10 PSRR (dB) -40 0 -10 -30 PSRR (dB) PSRR (dB) -30 PSRR COUT = 1µF PSRR COUT = 0.47µF 0 -50 -60 -70 FREQUENCY (Hz) 5 IOUT = 10mA -80 -90 -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 IOUT = 200mA -40 VIN = 3.6V + 40mVpp -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 FREQUENCY (Hz) M9999-020312-A Micrel, Inc. MIC94300 Typical Characteristics (Continued) 0 0 0 -10 -10 -10 -20 -20 -30 -30 -40 -50 -60 VIN = 1.8V -40 -50 -60 FREQUENCY (Hz) Voltage Drop vs. Output Current 1.90 1.85 1.80 1.75 1.70 VIN = 2.0V 3.60 195 3.55 190 VOLTAGE DROP (mV) OUTPUT VOLTAGE (V) 3.50 3.45 3.40 3.35 VIN = 3.6V 1.60 80 100 120 140 160 180 200 0 20 40 60 80 100 120 140 160 180 200 0 Ground Current vs. Output Current GROUND CURRENT (μA) 190 IOUT = 200mA 185 IOUT = 100mA 175 IOUT = 50mA CIN = COUT = 1µF 2 2.2 2.4 2.6 2.8 3 3.2 INPUT VOLTAGE (V) February 2012 3.4 145 140 135 130 125 120 VIN = 3.6V 115 CIN = COUT = 1μF 165 1.8 25 3.6 110 0 20 40 60 80 100 120 140 160 180 200 OUTPUT CURRENT (mA) 6 50 75 100 125 150 175 200 OUTPUT CURRENT (mA) 150 170 170 OUTPUT CURRENT (mA) Voltage Drop vs. Input Voltage 180 175 165 OUTPUT CURRENT (mA) 195 180 CIN = COUT = 1µF 3.30 60 185 CIN = COUT = 1µF CIN = COUT = 1µF GROUND CURRENT (μA) OUTPUT VOLTAGE (V) -90 Output Voltage vs. Output Current 1.95 40 COUT = 4.7µF VIN = 3.6V + 40mVpp LOAD = 100mA FREQUENCY (Hz) 2.00 20 -60 -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 Output Voltage vs. Output Current 0 -50 -80 VIN = 3.6V + 40mVpp LOAD = 100mA FREQUENCY (Hz) 1.65 COUT = 10µF -40 -70 -90 -100 10 100 1.E+03 1K 10K 1.E+05 100K 1.E+06 1M 1.E+07 10M 1.E+01 1.E+02 1.E+04 COUT = 2.2µF -30 COUT = 2.2µF -80 VIN = VIN(NOM) + 40mVpp LOAD = 100mA -90 COUT = 1µF -70 VIN = 2.5V -80 -20 COUT = 0.47µF PSRR (dB) VIN = 3.6V -70 VOLTAGE DROP (mV) PSRR (Varying COUT) PSRR (Varying COUT) PSRR (dB) PSRR (dB) PSRR COUT = 10µF Ground Current vs. Input Voltage 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 IOUT = 100mA IOUT = 200mA IOUT = 10mA CIN = COUT = 1μF 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 INPUT VOLTAGE (V) M9999-020312-A Micrel, Inc. MIC94300 Typical Characteristics (Continued) Output Noise Spectral Density Current Limit vs. Input Voltage 400 10 350 Noise µV/√Hz CURRENT LIMIT (mA) 375 325 300 275 250 1 0.1 VIN = VEN = 2.91V CIN = COUT = 1.0µF 225 CIN = COUT = 1μF NOISE (10Hz to 100kHz) = 98.5µVRMS 200 1.8 2 2.2 2.4 2.6 2.8 3 3.2 INPUT VOLTAGE (V) February 2012 3.4 3.6 0.01 10 1.E+01 100 1.E+02 1K 1.E+03 10K 1.E+04 100K 1.E+05 1M 1.E+06 FREQUENCY (Hz) 7 M9999-020312-A Micrel, Inc. MIC94300 Functional Characteristics February 2012 8 M9999-020312-A Micrel, Inc. MIC94300 Application Information Enable/Shutdown The MIC94300 comes with an active-high enable pin that allows the Ripple Blocker™ to be disabled. Forcing the enable pin low disables the MIC94300 and sends it into a “zero” off mode current state. In this state, current consumed by the MIC94300 goes nearly to zero. Forcing the enable pin high enables the output voltage. The active-high enable pin uses CMOS technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. The MIC94300 utilizes Ripple Blocker™ technology to integrate a load switch with a high-performance active filter. The MIC94300 includes a low-voltage logic enable pin, and is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Input Capacitor The MIC94300 is a high-performance, high-bandwidth device. An input capacitor of 470nF 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 MIC94300 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 which is fixed at 170mV typical, 250mV worst case. For example if the input voltage is 2.75V, the output voltage is 2.5V, and the output current = 200mA. The actual power dissipation of the Ripple Blocker™ can be determined using the equation: Output Capacitor The MIC94300 requires an output capacitor of 0.47µF or greater to maintain stability. 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 value by as much as 50% and 60%, respectively, over their operating temperature ranges. To use a ceramic-chip capacitor with 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) IOUT + VIN IGND Because this device is CMOS and the ground current is typically <100µA over the load range, the power dissipation contributed by the ground current is <1% and can be ignored for this calculation: PD = (2.75V − 2.5V) × 200mA PD = 0.05W 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 ⎝ No Load Stability The MIC94300 will remain stable with no load. This is especially important in CMOS RAM keep-alive applications. February 2012 ⎞ ⎟ ⎟ ⎠ TJ(max) = 125°C, the maximum junction temperature of the die, θJA thermal resistance = 250°C/W for the YCS package and 173°C/W for the YMT package. 9 M9999-020312-A Micrel, Inc. MIC94300 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. For example, when operating the MIC94300YMT at an input voltage of 2.75V and 200mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.05W = (125°C − TA)/(173°C/W) TA = 116°C Therefore the maximum ambient operating temperature of 116°C is allowed in a 1.2mm x 1.6mm MLF® package. 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=/productinfo/products/mic94300.jsp http://www.micrel.com/page.do?page=/productinfo/products/mic94310.jsp February 2012 10 M9999-020312-A Micrel, Inc. MIC94300 Evaluation Board Schematic Bill of Materials Item Part Number C1, C2 GRM155R61A105KE15D U1 MIC94300YCS Manufacturer Murata(1) Micrel, Inc. (2) Description Qty. Capacitor, 1µF Ceramic, 10V, X7R, Size 0402 2 200mA Ripple Blocker™ Voltage Follower 1 Notes: 1. Murata Tel: www.murata.com. 2. Micrel, Inc.: www.micrel.com. February 2012 11 M9999-020312-A Micrel, Inc. MIC94300 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 12 M9999-020312-A Micrel, Inc. MIC94300 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 13 M9999-020312-A