MIC23163/4 4MHz, 2A, 100% Duty Cycle Buck Regulator with HyperLight Load® and Power Good General Description Features The MIC23163/4 is a high-efficiency, 4MHz, 2A, ® synchronous buck regulator with HyperLight Load (HLL) mode and maximum 100% duty cycle. HLL provides veryhigh efficiency at light loads and ultra-fast transient response which makes the MIC23163/4 perfectly suited for supplying processor core voltages. An additional benefit of this proprietary architecture is very low output ripple voltage throughout the entire load range with the use of small output capacitors. The tiny 2.0mm × 2.0mm DFN package saves precious board space and requires only three external components. • • • • • • • • • • • • • • • • The MIC23163/4 is designed for use with a very small 0.47µH inductor and 10µF output capacitor that enables a total solution size, less than 1mm height. The MIC23163/4 has a very low quiescent current of 33µA and achieves as high as 85% efficiency at 1mA. At higher loads, the MIC23163/4 provides a constant switching frequency around 4MHz while achieving peak efficiencies up to 93%. The MIC23164 incorporates an active discharge feature that switches an 180Ω FET to ground to discharge the output when the part is disabled. The MIC23163/4 is available in 10-pin 2.0mm × 2.0mm DFN package with an operating junction temperature range from –40°C to +125°C. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Input voltage: 2.7V to 5.5V 100% duty cycle 2A output current Up to 93% peak efficiency 85% typical efficiency at 1mA Programmable soft-start with pre-bias start-up capability Power Good (PG) Indicator 4MHz PWM operation in continuous mode Ultra-fast transient response Low ripple output voltage Fully-integrated MOSFET switches 0.1µA shutdown current Thermal shutdown and current-limit protection 10-pin 2.0mm × 2.0mm Thin DFN –40°C to +125°C junction temperature range Disable pull down 180Ω (MIC23164 only) Applications • • • • • • • Cellular modems Mobile handsets Portable media/MP3 players Portable navigation devices (GPS) WiFi/WiMax/WiBro modules Digital cameras Wireless LAN cards Typical Application HyperLight Load is a registered 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 June 29, 2013 Revision 2.0 Micrel, Inc. MIC23163/4 Ordering Information Marking Code Output Voltage Auto Discharge Junction Temperature Range MIC23163YMT QAQ ADJ No –40°C to +125°C 10-Pin 2mm × 2mm Thin DFN MIC23164YMT KQA ADJ Yes –40°C to +125°C 10-Pin 2mm × 2mm Thin DFN Part Number Package (1, 2) Note: 1. DFN is a GREEN, RoHS-compliant package. Mold compound is Halogen Free. 2. DFN ▲ = Pin 1 identifier. Pin Configuration 2mm × 2mm DFN (MT) Adjustable Output Voltage (Top View) Pin Description Pin Number Pin Name 1 SW Switch (Output): Internal power MOSFET output switches. Disable pull down 180Ω (MIC23164 only). 2 EN Enable (Input): Logic high enables operation of the regulator. Logic low will shut down the device. Do not leave floating. 3 FB Feedback: Connect a resistor divider from the output to ground to set the output voltage. 4 NC Not Internally Connected. 5 PG Power Good: Open drain output for the power good indicator. Use a pull-up resistor from this pin to a voltage source to detect a power good condition. 6 SS Soft Start: Place a capacitor from this pin to ground to program the soft start time. Do not leave floating, 100pF minimum CSS is required. 7 AGND Analog Ground: Connect to central ground point where all high-current paths meet (CIN, COUT, PGND) for best operation. 8 AVIN Analog Input Voltage: Connect a capacitor to ground to decouple the noise. 9 PVIN Power Input Voltage: Connect a capacitor to PGND to decouple the noise. 10 PGND Power Ground. EP ePad Exposed Pad. Connect to GND. July 29, 2013 Pin Function 2 Revision 2.0 Micrel, Inc. MIC23163/4 Absolute Maximum Ratings(3) Operating Ratings(4) Supply Voltage (VAVIN, VPVIN) ............................. −0.3V to 6V Power Good Voltage (VPG) ................................ −0.3V to 6V Output Switch Voltage (VSW) ............................. −0.3V to 6V Enable Input Voltage (VEN) .. ..............................−0.3V to VIN Junction Temperature (TJ) ....................................... +150°C Storage Temperature Range (TS) ............. −65°C to +150°C Lead Temperature (soldering, 10s) ............................ 260°C (5) ESD Rating ................................................. ESD Sensitive Supply Voltage (VAVIN, VPVIN) ............................ 2.7V to 5.5V Enable Input Voltage (VEN) .. ……………………….0V to VIN Feedback Voltage (VFB) ...................................... 0.7V to VIN Junction Temperature Range (TJ).. ….−40°C ≤ TJ ≤ +125°C Thermal Resistance 2mm x 2mm Thin DFN -10 (θJA) ......................... 90°C/W 2mm x 2mm Thin DFN -10 (θJC) ......................... 45°C/W Electrical Characteristics(6) TA = 25°C; VIN = VEN = 3.6V; L = 0.47µH; COUT = 10µF unless otherwise specified. Bold values indicate –40°C ≤ TJ ≤ +125°C, unless otherwise noted. Parameter Condition Min. 2.7 Supply Voltage Range Undervoltage Lockout Threshold Typ. 2.40 (Turn-On) 2.53 Undervoltage Lockout Hysteresis Max. Units 5.5 V 2.65 V 75 mV Quiescent Current IOUT = 0mA , VSNS > 1.2 × VOUT Nominal 33 55 µA Shutdown Current VEN = 0V; VIN = 5.5V 0.1 5 µA +2.5 % 0.72 V Output Voltage Accuracy VIN = 3.6V if VOUTNOM < 2.5V, ILOAD = 20mA VIN = 4.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA Feedback Regulation Voltage Current Limit Output Voltage Line Regulation VSNS = 0.9*VOUTNOM −2.5 0.68 0.7 2.5 3.3 A 0.3 %/V VIN = 3.6V to 5.5V if VOUTNOM < 2.5V, ILOAD = 20mA VIN = 4.5V to 5.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA 20mA < ILOAD < 500mA, VIN = 3.6V if VOUTNOM < 2.5V Output Voltage Load Regulation 0.3 20mA < ILOAD < 500mA, VIN = 5.0V if VOUTNOM ≥ 2.5V % 20mA < ILOAD < 1A, VIN = 3.6V if VOUTNOM < 2.5V 0.3 20mA < ILOAD < 1A, VIN = 5.0V if VOUTNOM ≥ 2.5V PWM Switch ON-Resistance ISW = 100mA PMOS ISW = −100mA NMOS Switching Frequency IOUT = 120mA Soft-Start Time VOUT = 90%, CSS = 1nF Soft-Start Current VSS = 0V Power Good Threshold (Rising) % of VNOM 0.13 0.13 Ω 4 MHz 1000 µs 2.2 µA 85 90 95 % 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. July 29, 2013 3 Revision 2.0 Micrel, Inc. MIC23163/4 Electrical Characteristics(6) (Continued) TA = 25°C; VIN = VEN = 3.6V; L = 0.47µH; COUT = 10µF unless otherwise specified. Bold values indicate –40°C ≤ TJ ≤ +125°C, unless otherwise noted. Parameter Condition Min. Power Good Threshold Hysteresis Typ. Max. 7 Power Good Pull-Down VSNS = 90% VNOMINAL, IPG = 1mA Enable Threshold Turn-On Units % 200 mV 0.8 1.2 V Enable Input Current 0.1 2 µA Overtemperature Shutdown 160 °C Overtemperature Shutdown Hysteresis 20 °C 180 Ω SW Pull-Down Resistance (MIC23164 only) July 29, 2013 0.5 VEN = 0V 4 Revision 2.0 Micrel, Inc. MIC23163/4 Typical Characteristics Efficiency vs. Output Current VOUT = 1.8V @ 25°C 100 95 VIN = 3V 90 1000000 VIN = 4.2V 95 100000 EFFICIENCY (%) VIN = 3.6V 80 VIN = 5V 75 70 65 60 RISE TIME (µs) 90 85 EFFICIENCY (%) VOUT Rise Time vs. CSS Efficiency vs. Output Current VOUT = 3.3V @ 25°C VIN = 5V 85 80 75 70 10000 1000 100 65 60 55 55 50 50 1 10 100 1000 10000 10 VIN = 3.6V 1 10 OUTPUT CURRENT (mA) 100 1000 1 1000 10000 10000 Current Limit vs. Input Voltage 50 3.6 45 3.4 40 1000000 IQ vs. Temperature Quiscent Current vs. Input Voltage 3.8 100000 CSS (pF) OUTPUT CURRENT (mA) 50 3.2 46 44 IQ (µA) IQ (µA) CURRENT LIMIT (A) 48 35 3 30 2.8 25 3.5 4.0 4.5 5.0 30 2.5 5.5 3.0 3.5 1.870 1.863 1.868 1.862 1.866 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.864 1.861 IOUT = 30mA 1.859 1.858 1.857 IOUT = 130mA 4.0 4.5 July 29, 2013 5.0 5.5 0 20 40 60 80 100 120 Output Voltage vs. Output Current (DCM) 1.815 IOUT = 1A 1.858 1.856 IOUT = 300mA 1.854 1.854 3.5 -20 TEMPERATURE (°C) 1.860 1.850 INPUT VOLTAGE (V) -40 5.5 1.862 1.852 3.0 5.0 1.820 1.864 1.855 2.5 4.5 Line Regulation (High Loads) Line Regulation (Light Loads) 1.856 4.0 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1.860 VIN = 3.6V 32 OUTPUT VOLTAGE (V) 3.0 38 34 TCASE = 25°C 20 2.5 40 36 TCASE = 25°C 2.6 42 1.810 1.805 1.800 1.795 VIN = 3.6V 1.790 2.5 3.0 3.5 4.0 4.5 INPUT VOLTAGE (V) 5 5.0 5.5 0 20 40 60 80 100 120 140 160 180 200 OUTPUT CURRENT (mA) Revision 2.0 Micrel, Inc. MIC23163/4 Typical Characteristics (Continued) 2.100 92 1.815 2.080 91 1.810 1.805 1.800 1.795 1.790 VIN = 3.6V PG THRESHOLD (% OF VREF) 1.820 1.785 2.060 2.040 2.020 2.000 1.980 1.960 1.940 VIN = 3.6V IOUT = 30mA 1.920 200 500 800 1100 1400 1700 -20 OUPUT CURRENT (mA) PG Delay Time vs. Input Voltage 0 20 40 60 80 100 120 PG RISING 25 PG FALLING 20 15 2.5 3.0 3.5 4.0 4.5 5.0 3.0 3.5 4.0 4.5 5.0 Enable Thresholds vs. Input Voltage 5.5 0.95 UVLO ON 2.54 2.52 2.5 UVLO OFF 2.48 0.90 0.85 0.80 0.75 0.70 0.65 TCASE = 25°C 0.60 -20 0 20 40 60 80 100 120 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) Enable Threshold vs. Temperature Switching Frequency vs. Output Current Feedback Voltage vs. Temperature 1.00 5.5 0.720 10000 0.715 0.90 0.85 0.80 0.75 0.70 0.65 FEEDBACK VOLTAGE (V) SW FREQUENCY (kHz) 0.95 ENABLE THRESHOLDS (V) PG FALLING 84 1.00 -40 5.5 85 UVLO Thresholds vs. Temperature 2.46 10 86 2.5 ENABLE THRESHOLD (V) 30 88 87 INPUT VOLTAGE (V) 2.56 UVLO THRESHOLDS (V) 35 89 TEMPERATURE (°C) 2.58 40 90 82 -40 2000 PG RISING 83 1.900 1.780 PG DELAY TIME (µS) PG Thresholds vs. Input Voltage Output Voltage vs. Temperature OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Output Voltage vs. Output Current (CCM) VIN = 3.6V 1000 100 VIN = 5V 10 1 0.60 -20 0 20 40 60 80 TEMPERATURE (°C) July 29, 2013 0.705 0.700 0.695 0.690 0.685 VIN = 3.6V -40 0.710 100 120 0.680 1 10 100 1000 OUPUT CURRENT (mA) 6 10000 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) Revision 2.0 Micrel, Inc. MIC23163/4 Typical Characteristics (Continued) Shutdown Current vs. Temperature SHUTDOWN CURRENT (µA) 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0.00 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) July 29, 2013 7 Revision 2.0 Micrel, Inc. MIC23163/4 Functional Characteristics July 29, 2013 8 Revision 2.0 Micrel, Inc. MIC23163/4 Functional Characteristics (Continued) July 29, 2013 9 Revision 2.0 Micrel, Inc. MIC23163/4 Functional Characteristics (Continued) July 29, 2013 10 Revision 2.0 Micrel, Inc. MIC23163/4 Functional Diagram Figure 1. Simplified MIC23163/4 Functional Block Diagram − Adjustable Output Voltage July 29, 2013 11 Revision 2.0 Micrel, Inc. MIC23163/4 PG The power good (PG) pin is an open drain output which indicates logic high when the output voltage is typically above 90% of its steady state voltage. A pull-up resistor of more than 5kΩ should be connected from PG to VOUT. Functional Description VIN The input supply (VIN) provides power to the internal MOSFETs for the switch-mode regulator along with the internal control circuitry. The VIN operating range is 2.7V to 5.5V so an input capacitor, with a minimum voltage rating of 6.3V, is recommended. Due to the high switching speed, a minimum 2.2µF bypass capacitor placed close to VIN and the power ground (PGND) pin is required. Refer to the “PCB Layout Recommendations” section for details. SS The soft start (SS) pin is used to control the output voltage ramp up time. The approximate equation for the 3 ramp time in seconds is 270 × 10 × ln(10) × CSS. For example, for a CSS = 1nF, TRISE ~ 600µs. The minimum recommended value for CSS is 1nF. FB The feedback (FB) pin is provided for the adjustable voltage option (no internal connection for fixed options). This is the control input for programming the output voltage. A resistor divider network is connected to this pin from the output and is compared to the internal 0.7V reference within the regulation loop. EN/Shutdown A logic high signal on the enable pin activates the output voltage of the device. A logic low signal on the enable pin deactivates the output and reduces supply current to 0.1µA. When disabled the MIC23164 switches an internal load of 180Ω on the regulators switch node to discharge the output. The MIC23163/4 features external soft-start circuitry via the soft start (SS) pin that reduces in-rush current and prevents the output voltage from overshooting at start up. Do not leave the EN pin floating. The output voltage can be programmed between 0.7V and VIN using Equation 1: R1 VOUT = VREF × 1 + R2 SW The switch (SW) connects directly to one end of the inductor and provides the current path during switching cycles. The other end of the inductor is connected to the load, SNS pin and output capacitor. Due to the highspeed switching on this pin, the switch node should be routed away from sensitive nodes whenever possible. AGND The analog ground (AGND) is the ground path biasing and control circuitry. The current loop signal ground should be separate from the power (PGND) loop. Refer to the “PCB Recommendations” section for details. where: R1 is the top resistor, R2 is the bottom resistor. Table 1. Example Feedback Resistor Values for the for the ground Layout PGND The power ground pin is the ground path for the high current in PWM mode. The current loop for the power ground should be as small as possible and separate from the analog ground (AGND) loop as applicable. Refer to the “PCB Layout Recommendations” section for details. July 29, 2013 Eq. 1 12 VOUT R1 R2 1.2V 215k 301k 1.5V 301k 261k 1.8V 340k 215k 2.5V 274k 107k 3.3V 383k 102k 3.6V 422k 102k Revision 2.0 Micrel, Inc. MIC23163/4 Maximum current ratings of the inductor are generally given in two methods; permissible DC current and saturation current. Permissible DC current can be rated either for a 40°C temperature rise or a 10% to 20% loss in inductance. Ensure the inductor selected can handle the maximum operating current. When saturation current is specified, make sure that there is enough margin so that the peak current does not cause the inductor to saturate. Peak current can be calculated as illustrated in Equation 2: Application Information The MIC23163/4 is a high-performance DC/DC stepdown regulator offering a small solution size. Supporting an output current up to 2A inside a tiny 2mm × 2mm DFN package, the IC requires only three external components while meeting today’s miniature portable electronic device needs. Using the HyperLight Load (HLL) switching scheme, the MIC23163/4 is able to maintain high efficiency throughout the entire load range while providing ultra-fast load transient response. The following sections provide additional device application information. 1 − VOUT /VIN IPEAK = I OUT + VOUT 2× f ×L Input Capacitor A 2.2µF ceramic capacitor or greater should be placed close to the VIN pin and PGND pin for bypassing. A Murata GRM188R60J475ME84D, size 0603, 4.7µF ceramic capacitor is recommended based on performance, size, and cost. A X5R or X7R temperature rating is recommended for the input capacitor. Y5V temperature rating capacitors, aside from losing most of their capacitance over temperature, can also become resistive at high frequencies. This reduces their ability to filter out high-frequency noise. Eq. 2 As shown by Equation 2, the peak inductor current is inversely proportional to the switching frequency and the inductance; the lower the switching frequency or the inductance the higher the peak current. As input voltage increases, the peak current also increases. The size of the inductor depends on the requirements of the application. Refer to the “Typical Application Circuit” and “Bill of Materials” sections for details. DC resistance (DCR) is also important. While DCR is inversely proportional to size, DCR can represent a significant efficiency loss. Refer to the “Efficiency Considerations” section for more details. Output Capacitor The MIC23163/4 is designed for use with a 10µF or greater ceramic output capacitor. Increasing the output capacitance will lower output ripple and improve load transient response but could also increase solution size or cost. A low equivalent series resistance (ESR) ceramic output capacitor such as the Murata GRM188R60J106ME84D, size 0603, 10µF ceramic capacitor is recommended based upon performance, size and cost. Both the X7R or X5R temperature rating capacitors are recommended. The Y5V and Z5U temperature rating capacitors are not recommended due to their wide variation in capacitance over temperature and increased resistance at high frequencies. The transition between high loads (CCM) to HLL mode is determined by the inductor ripple current and the load current. Inductor Selection When selecting an inductor, it is important to consider the following factors (not necessarily in the order of importance): • Rated current value • Size requirements • DC resistance (DCR) Figure 2. Signals for High-Side Switch Drive (HSD) for TON Control, Inductor Current, and Low-Side Switch Drive (LSD) for TOFF Control The MIC23163/4 is designed for use with a 0.47µH inductor. This allows for rapid output voltage recovery during line and load transients. July 29, 2013 13 Revision 2.0 Micrel, Inc. MIC23163/4 In HLL mode, the inductor is charged with a fixed Ton pulse on the high-side switch (HSD). After this, the LSD is switched on and current falls at a rate VOUT/L. The controller remains in HLL mode while the inductor falling current is detected to cross approximately −50mA. When the LSD (or TOFF) time reaches its minimum and the inductor falling current is no longer able to reach this −50mA threshold, the part is in CCM mode and switching at a virtually constant frequency. Efficiency vs. Output Current VOUT = 1.8V @ 25°C 95 EFFICIENCY (%) 85 Once in CCM mode, the TOFF time will not vary. 70 65 50 1 10 100 1000 10000 OUTPUT CURRENT (mA) Figure 3. Efficiency under Load Figure 3 shows an efficiency curve. From no load to 100mA, efficiency losses are dominated by quiescent current losses, gate drive and transition losses. By using the HLL mode, the MIC23163/4 is able to maintain high efficiency at low output currents. Efficiency Considerations Efficiency is defined as the amount of useful output power, divided by the amount of power supplied, as shown in Equation 3: Over 100mA, efficiency loss is dominated by MOSFET RDSON and inductor losses. Higher input supply voltages will increase the gate-to-source threshold on the internal MOSFETs, thereby reducing the internal RDSON. This improves efficiency by reducing DC losses in the device. All but the inductor losses are inherent to the device. In which case, inductor selection becomes increasingly critical in efficiency calculations. As the inductors are reduced in size, the DC resistance (DCR) can become quite significant. The DCR losses can be calculated as in Equation 4: Eq. 3 Maintaining high efficiency serves two purposes. It reduces power dissipation in the power supply, reducing the need for heat sinks and thermal design considerations and it reduces consumption of current for battery-powered applications. Reduced current draw from a battery increases the device’s operating time and is critical in handheld devices. PDCR = I OUT × DCR 2 There are two types of losses in switching converters; DC losses and switching losses. DC losses are simply the 2 power dissipation of I R. Power is dissipated in the high side switch during the on cycle. Power loss is equal to the high side MOSFET RDSON multiplied by the switch current squared. During the off cycle, the low side N-channel MOSFET conducts, also dissipating power. Device operating current also reduces efficiency. The product of the quiescent (operating) current and the supply voltage represents another DC loss. The current required driving the gates on and off at a constant 4MHz frequency and the switching transitions make up the switching losses. July 29, 2013 VIN = 5V 75 55 Duty Cycle The maximum duty cycle of the MIC23163/4 is 100%, allowing operation in dropout to extend battery life. × 100 VIN = 3.6V 80 60 Compensation The MIC23163/4 is designed to be stable with a 0.47µH inductor with a 10µF ceramic (X5R) output capacitor. A feed-forward capacitor in the range of 15pF to 68pF is essential across the top feedback resistor. V ×I Efficiency % = OUT OUT VIN × IIN VIN = 3V 90 Eq. 4 From that, the loss in efficiency due to inductor resistance can be calculated as in Equation 5: VOUT × I OUT Efficiency Loss = 1 − VOUT × I OUT + PDCR × 100 Eq. 5 Efficiency loss due to DCR is minimal at light loads and gains significance as the load is increased. Inductor selection becomes a trade-off between efficiency and size in this case. 14 Revision 2.0 Micrel, Inc. MIC23163/4 HyperLight Load Mode MIC23163/4 uses a minimum on and off time proprietary control loop (PCL) patented by Micrel called HyperLight Load (HLL). When the output voltage falls below the regulation threshold, the error comparator begins a switching cycle that turns the PMOS on and keeps it on for the duration of the minimum-on-time. This increases the output voltage. If the output voltage is over the regulation threshold, then the error comparator turns the PMOS off for a minimum-off-time until the output drops below the threshold. The NMOS acts as an ideal rectifier that conducts when the PMOS is off. Using a NMOS switch instead of a diode allows for lower voltage drop across the switching device when it is on. The asynchronous switching combination between the PMOS and the NMOS allows the control loop to work in discontinuous mode for light load operations. In discontinuous mode, the MIC23163/4 works in pulse frequency modulation (PFM) to regulate the output. As the output current increases, the off-time decreases, thus provides more energy to the output. This switching scheme improves the efficiency of MIC23163/4 during light load currents by only switching when it is needed. As the load current increases, the MIC23163/4 goes into continuous conduction mode (CCM) and switches at a frequency centered at 4MHz. The equation to calculate the load when the MIC23163/4 goes into continuous conduction mode may be approximated by Equation 6: (V − VOUT ) × D ILOAD > IN 2L × f July 29, 2013 As shown in Equation 6, the load at which the MIC23163/4 transitions from HLL mode to PWM mode is a function of the input voltage (VIN), output voltage (VOUT), duty cycle (D), inductance (L) and frequency (f). As shown in Figure 4, as the output current increases, the switching frequency also increases until the MIC23163/4 goes from HLL mode to PWM mode at approximately 120mA. The MIC23163/4 will switch at a relatively constant frequency around 4MHz once the output current is over 120mA. Switching Frequency vs. Output Current SW FREQUENCY (kHz) 10000 VIN = 3.6V 1000 100 VIN = 5V 10 1 1 10 100 1000 10000 OUPUT CURRENT (mA) Figure 4. SW Frequency vs. Output Current Eq. 6 15 Revision 2.0 Micrel, Inc. MIC23163/4 Typical Application Circuit Bill of Materials Item C1 C2 C3 C4 L1 Part Number C1608X5R0J475K Manufacturer TDK (8) GRM188R60J475KE19D Murata C1608X5R0J106K080AB TDK GRM188R60J106ME84D Murata GRM188R71H102MA01D Murata 06035C102KAT2A AVX 06035A150KAT2A GRM1885C1H150JA01D FLF3215T-R47N LQH32PNR47NNC Description Qty. (7) (9) AVX Murata 4.7µF, 6.3V, X5R, Size 0603 1 10µF, 6.3V, X5R, Size 0603 1 1nF/50V, X7R, 0603 1 15pF, 50V, 0603 1 TDK 0.47µH, 2.8A, 21mΩ, L3.2mm × W2.5mm × H1.55mm Murata 0.47µH, 2.9A, 24mΩ, L3.2mm × W2.5mm × H1.55mm 10 1 R1 CRCW0603301KFKEA Vishay( ) 301kΩ, 1%, 1/10W, Size 0603 1 R2 CRCW0603158KFKEA Vishay 158kΩ, 1%, 1/10W, Size 0603 1 R3, R4 CRCW0603100KFKEA Vishay 100kΩ, 1%, 1/10W, Size 0603 1 R5 CRCW060310R0FKEA Vishay 10Ω, 1%, 1/10W, Size 0603 1 4MHz, 2A, 100% Duty Cycle Buck Regulator with ® HyperLight Load and Power Good 1 U1 MIC23163YMT MIC23164YMT (11) Micrel, Inc. Notes: 7. TDK: www.tdk.com. 8. Murata: www.murata.com. 9. AVX: www.avx.com. 10. Vishay: www.vishay.com. 11. Micrel, Inc.: www.micrel.com. July 29, 2013 16 Revision 2.0 Micrel, Inc. MIC23163/4 PCB Layout Recommendations Top Layer Bottom Layer July 29, 2013 17 Revision 2.0 Micrel, Inc. MIC23163/4 Package Information(12) and Recommended Landing Pattern 10-Pin 2mm × 2mm DFN (MT) Note: 12. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com. July 29, 2013 18 Revision 2.0 Micrel, Inc. MIC23163/4 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. © 2013 Micrel, Incorporated. July 29, 2013 19 Revision 2.0