MIC94305 500 mA Switch with Ripple BlockerTM Technology Features General Description * 1.8V to 3.6V Input Voltage Range * Active Noise Rejection Over a Wide Frequency Band - >60 dB from 40 kHz to 5 MHz * Rated to 500 mA Output Current * Current-Limit and Thermal-Limit Protected * 1.6 mm x 1.6 mm 6-Pin Thin DFN * Logic-Controlled Enable Pin * -40C to +125C Junction Temperature Range The MIC94305 is an integrated load switch that incorporates Microchip's Ripple BlockerTM 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. Applications * * * * * * * Smartphones Tablet PC/Notebooks and Webcams Digital Still and Video Cameras Video Conferencing Barcode Scanners Global Positioning Systems Automotive and Industrial Applications 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 (VOUT) is set at a fixed drop (typically 170 mV) from the input voltage (VOUT = VIN - 170 mV). This maintains high efficiency independent of given load conditions and currents. The MIC94305 is packaged in a 6-pin 1.6 mm x 1.6 mm Thin DFN package and has a junction operating temperature range of -40C to +125C. Package Type MIC94305 6-Pin TDFN (MT) (Top View) VOUT 1 6 VIN VOUT 2 5 VIN GND 3 2018 Microchip Technology Inc. EP 4 EN DS20006029A-page 1 MIC94305 Typical Application Circuit MIC94305 1.6 x 1.6 TDFN MIC94305YMT DC/DC EN CIN 4.7F VIN VOUT EN GND LOAD COUT 4.7F Functional Block Diagram VIN CHARGE PUMP LPF DRIVER EN BIAS AND THERMAL SHUTDOWN VOUT GND DS20006029A-page 2 2018 Microchip Technology Inc. MIC94305 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings Input Voltage (VIN) .................................................................................................................................... -0.3V to +4.0V Output Voltage (VOUT) .............................................................................................................................. -0.3V to +4.0V Enable Voltage (VEN) ............................................................................................................ -0.3V to VIN+0.3V or +4.0V ESD Rating (Note 1) ................................................................................................................................................ +3 kV Operating Ratings Input Voltage (VIN) .................................................................................................................................... +1.8V to +3.6V Enable Voltage (VEN) ..........................................................................................................................................0V to VIN Notice: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. Notice: The device is not guaranteed to function outside its operating ratings. Note 1: Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 k in series with 100 pF. ELECTRICAL CHARACTERISTICS Electrical Characteristics: VIN = VEN = 3.6V; IOUT = 1 mA; COUT = 4.7 F; TA = +25C, bold values indicate -40C TJ +125C, unless noted. Note 1 Parameter Sym. Min. Typ. Max. Units Input Voltage VIN 1.8 -- 3.6 V Voltage Drop VDROP -- 170 250 mV VIN Ripple Rejection PSRR -- 45 -- -- 55 -- dB Conditions -- VIN - VOUT, -40C TJ +85C f = 20 kHz, IOUT = 500 mA f = 100 kHz to 5 MHz, IOUT = 500 mA Total Output Noise eN -- 98 -- Current Limit ILIM 530 725 1100 mA VOUT = 0V Turn-On Time tON -- 90 150 s EN controlled Load Regulation -- -- 10 -- mV 100 A to 100 mA Ground Current IGND -- 150 200 A IOUT = 100 A Shutdown Current ISHDN -- 0.2 5 A VEN = 0V Input Logic Low -- -- -- 0.4 V -- Input Logic High -- 1.0 -- -- V -- Input Current IIN -- 0.01 1 A -- VRMS f = 10 Hz to 100 kHz Enable Note 1: Specification for packaged product only. 2018 Microchip Technology Inc. DS20006029A-page 3 MIC94305 TEMPERATURE SPECIFICATIONS Parameters Sym. Min. Typ. Max. Units Conditions TJ -40 -- +125 C -- Temperature Ranges Junction Operating Temperature Lead Temperature -- -- -- +260 C Soldering, 10 sec. Storage Temperature Range TS -65 -- +150 C -- JA -- 92 -- C/W -- Package Thermal Resistances Thermal Resistance, TDFN 6-Ld Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +125C rating. Sustained junction temperatures above +125C can impact the device reliability. DS20006029A-page 4 2018 Microchip Technology Inc. MIC94305 2.0 Note: TYPICAL PERFORMANCE CURVES The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. FIGURE 2-1: PSRR COUT = 4.7 F. FIGURE 2-4: PSRR COUT = 10 F. FIGURE 2-2: PSRR COUT = 4.7 F. FIGURE 2-5: PSRR COUT = 10 F. FIGURE 2-3: PSRR COUT = 4.7 F. FIGURE 2-6: PSRR COUT = 10 F. 2018 Microchip Technology Inc. DS20006029A-page 5 MIC94305 . FIGURE 2-7: PSRR COUT = 22 F. FIGURE 2-10: Current. Output Voltage vs. Output FIGURE 2-8: PSRR COUT = 22 F. FIGURE 2-11: Current. Output Voltage vs. Output FIGURE 2-9: PSRR COUT = 22 F. FIGURE 2-12: Current. Voltage Drop vs. Output DS20006029A-page 6 2018 Microchip Technology Inc. MIC94305 FIGURE 2-13: Current. Voltage Drop vs. Input FIGURE 2-16: Density. Output Noise Spectral FIGURE 2-14: Current. Ground Current vs. Output FIGURE 2-17: Load Transient. VIN (1V/div) VOUT (1V/div) CIN = COUT = 4.7F IOUT = 300mA Time (1.00ms/div) FIGURE 2-15: Voltage. Ground Current vs. Input 2018 Microchip Technology Inc. FIGURE 2-18: Line Transient. DS20006029A-page 7 MIC94305 VIN = 2.8V CIN = COUT = 4.7F IOUT = 500mA VEN (1V/div) VOUT (2V/div) Time (400s/div) FIGURE 2-19: Enable Turn-Off. VIN = 2.8V CIN = COUT = 4.7F VEN (1V/div) VOUT (2V/div) Time (400s/div) FIGURE 2-20: DS20006029A-page 8 Enable Turn-On. 2018 Microchip Technology Inc. MIC94305 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin Number Pin Name 1, 2 VOUT Power switch output. 3 GND Ground. 4 EN Enable Input. A logic-high signal on this pin enables the part. Logic-low disables the part. Do not leave floating. 5, 6 VIN Power switch input and chip supply. ePad EP Exposed heatsink pad. Connect to Ground for best thermal performance. 2018 Microchip Technology Inc. Description DS20006029A-page 9 MIC94305 4.0 APPLICATION INFORMATION The MIC94305 uses Ripple Blocker technology to integrate a load switch with a high-performance active filter. The MIC94305 includes a low voltage logic enable pin and is fully protected from damage caused by fault conditions, offering linear current-limiting and thermal shutdown. 4.1 Input Capacitor The MIC94305 is a high-performance, high-bandwidth device. An input capacitor of 0.47 F 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 not recommended. 4.2 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. If you use a ceramic-chip capacitor with a 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. No-Load Stability The MIC94305 will remain stable with no load. This is especially important in CMOS RAM keep-alive applications. 4.4 4.5 Thermal Considerations The MIC94305 is designed to provide 500 mA 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 170 mV typical, 250 mV worst case. For example if the input voltage is 2.75V, the output voltage is 2.5V, and the output current equals 500 mA. The actual power dissipation of the Ripple BlockerTM can be determined using Equation 4-1: EQUATION 4-1: P D = V IN - V OUT I OUT + V IN I GND Output Capacitance The MIC94305 requires an output capacitor of 4.7 F or greater to maintain stability. For optimal ripple rejection performance, a 4.7 F 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 4.7 F ceramic output capacitor and does not improve significantly with larger capacitance. 4.3 consumed by the MIC94305 goes to nearly zero. Forcing the enable pin high enables the output voltage. The active-high enable pin uses CMOS technology and cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Enable/Shutdown The MIC94305 comes with an active-high enable pin that allows the Ripple Blocker to be disabled. Forcing the enable pin low disables the MIC94305 and sends it into a "zero" off mode current state. In this state, current DS20006029A-page 10 Because this device is CMOS and the ground current is typically <100 A over the load range, the power dissipation contributed by the ground current is <1% and can be ignored for the calculation shown in Equation 4-2. EQUATION 4-2: P D = 2.75V - 2.5V 500 mA P D = 0.125W To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and the Equation 4-3: EQUATION 4-3: T J MAX - T A P D MAX = -------------------------------- JA Where: TJ(MAX) = +125C; the max. junction temp. of the die. JA = 92C/W for the 6-lead TDFN. Substituting PD for PD(MAX) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. For proper operation, the maximum power dissipation must not be exceeded. 2018 Microchip Technology Inc. MIC94305 For example, when operating the MIC94305YMT at a 2.75V input voltage and 500 mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: EQUATION 4-4: 0.125W = 125C - T A 92C/W T A = 113.5C It follows from this equation that the maximum ambient operating temperature of 113.5C is allowed in a 1.6 mm x 1.6 mm TDFN package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the "Regulator Thermals" section of Microchip's Designing with Low-Dropout Voltage Regulators handbook. 2018 Microchip Technology Inc. DS20006029A-page 11 MIC94305 5.0 PACKAGING INFORMATION 5.1 Package Marking Information 6-Lead TDFN* XX Legend: XX...X Y YY WW NNN e3 * Example 2W Product code or customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC(R) designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. , , Pin one index is identified by a dot, delta up, or delta down (triangle mark). Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. Package may or may not include the corporate logo. Underbar (_) and/or Overbar () symbol may not be to scale. DS20006029A-page 12 2018 Microchip Technology Inc. MIC94305 6-Lead 1.6 mm x 1.6 mm Thin DFN Package Outline & Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. 2018 Microchip Technology Inc. DS20006029A-page 13 MIC94305 NOTES: DS20006029A-page 14 2018 Microchip Technology Inc. MIC94305 APPENDIX A: REVISION HISTORY Revision A (May 2018) * Converted Micrel document MIC94305 to Microchip data sheet template DS20006029A. * Minor grammatical text changes throughout. * Added soldering conditions to Lead Temperature value in Temperature Specifications. * Added voltage drop information to Section 4.5 "Thermal Considerations". 2018 Microchip Technology Inc. DS20006029A-page 15 MIC94305 NOTES: DS20006029A-page 16 2018 Microchip Technology Inc. MIC94305 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. Examples: Device X XX -XX Part No. Junction Temp. Range Package Media Type Device: MIC94305: Y Package: MT = 6-Lead 1.6 mm x 1.6 mm TDFN Media Type: T5 TR 500/Reel 5,000/Reel = = MIC94305, -40C to +125C Temperature Range, 6-Lead TDFN, 500/Reel b) MIC94305YMT-TR: MIC94305, -40C to +125C Temperature Range, 6-Lead TDFN, 5,000/Reel 500 mA Switch with Ripple Blocker Technology Junction Temperature Range: = a) MIC94305YMT-T5: -40C to +125C, RoHS-Compliant 2018 Microchip Technology Inc. Note 1: Tape and Reel identifier only appears in the catalog part number description. This identifier is used for ordering purposes and is not printed on the device package. Check with your Microchip Sales Office for package availability with the Tape and Reel option. DS20006029A-page 17 MIC94305 NOTES: DS20006029A-page 18 2018 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: * Microchip products meet the specification contained in their particular Microchip Data Sheet. * Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. * There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. * Microchip is willing to work with the customer who is concerned about the integrity of their code. * Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable." Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless otherwise stated. Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified. QUALITYMANAGEMENTSYSTEM CERTIFIEDBYDNV Trademarks The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BeaconThings, BitCloud, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KEELOQ, KEELOQ logo, Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, RightTouch, SAM-BA, SpyNIC, SST, SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight Load, IntelliMOS, mTouch, Precision Edge, and Quiet-Wire are registered trademarks of Microchip Technology Incorporated in the U.S.A. Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom, chipKIT, chipKIT logo, CodeGuard, CryptoAuthentication, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, Mindi, MiWi, motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, QMatrix, RightTouch logo, REAL ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. (c) 2018, Microchip Technology Incorporated, All Rights Reserved. ISBN: 978-1-5224-3068-1 == ISO/TS16949== 2018 Microchip Technology Inc. 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