FLF3215T-R47N

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Document overview

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Technical content

Features

• 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

Micrel, Inc. MIC23163/4 July 29, 2013 2 Revision 2.0

Ordering Information

Discharge Junction Temperature Range Package(1, 2) 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 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 Pin Function 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.

Micrel, Inc. MIC23163/4 July 29, 2013 3 Revision 2.0 Absolute Maximum Ratings(3) Operating Ratings(4) Enable Input Voltage (VEN) .. ……………………….0V to V IN Junction Temperature Range (TJ) .. …. −40°C ≤ TJ ≤ +125°C Thermal Resistance 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. Typ. Max. Units Supply Voltage Range 2.7 5.5 V Undervoltage Lockout Threshold (Turn-On) 2.40 2.53 2.65 V Undervoltage Lockout Hysteresis 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 Output Voltage Accuracy VIN = 3.6V if VOUTNOM < 2.5V, ILOAD = 20mA −2.5 +2.5 % VIN = 4.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA Feedback Regulation Voltage 0.68 0.7 0.72 V Current Limit VSNS = 0.9*VOUTNOM 2.5 3.3 A Output Voltage Line Regulation VIN = 3.6V to 5.5V if VOUTNOM < 2.5V, ILOAD = 20mA 0.3 %/V VIN = 4.5V to 5.5V if VOUTNOM ≥ 2.5V, ILOAD = 20mA Output Voltage Load Regulation 20mA < ILOAD < 500mA, VIN = 3.6V if VOUTNOM < 2.5V 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 0.13 0.13 Ω ISW = −100mA NMOS Switching Frequency IOUT = 120mA 4 MHz Soft-Start Time VOUT = 90%, CSS = 1nF 1000 µs Soft-Start Current VSS = 0V 2.2 µA Power Good Threshold (Rising) % of VNOM 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. 6. Specification for packaged product only.

Micrel, Inc. MIC23163/4 July 29, 2013 4 Revision 2.0 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. Typ. Max. Units Power Good Threshold Hysteresis 7 % Power Good Pull-Down VSNS = 90% VNOMINAL, IPG = 1mA 200 mV Enable Threshold Turn-On 0.5 0.8 1.2 V Enable Input Current 0.1 2 µA Overtemperature Shutdown 160 °C Overtemperature Shutdown Hysteresis 20 °C SW Pull-Down Resistance (MIC23164 only) VEN = 0V 180 Ω

Micrel, Inc. MIC23163/4 July 29, 2013 5 Revision 2.0 Typical Characteristics 1 10 100 1000 10000 EFFICIENCY (%) OUTPUT CURRENT (mA) Efficiency vs. Output Current VOUT = 1.8V @ 25°C VIN = 3V VIN = 3.6V VIN = 5V 100 1 10 100 1000 10000 EFFICIENCY (%) OUTPUT CURRENT (mA) Efficiency vs. Output Current VOUT = 3.3V @ 25°C VIN = 5V VIN = 4.2V 100 1000 10000 100000 1000000 1000 10000 100000 1000000 RISE TIME (µs) CSS (pF) VOUT Rise Time vs. CSS VIN = 3.6V 2.6 2.8 3.2 3.4 3.6 3.8 CURRENT LIMIT (A) INPUT VOLTAGE (V) Current Limit vs. Input Voltage TCASE = 25°C IQ (µA) INPUT VOLTAGE (V) Quiscent Current vs. Input Voltage TCASE = 25°C -40 -20 0 20 40 60 80 100 120 IQ (µA) TEMPERATURE (°C) IQ vs. Temperature VIN = 3.6V 1.854 1.855 1.856 1.857 1.858 1.859 1.860 1.861 1.862 1.863 1.864 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Line Regulation (Light Loads) IOUT = 130mA IOUT = 30mA 1.850 1.852 1.854 1.856 1.858 1.860 1.862 1.864 1.866 1.868 1.870 OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) Line Regulation (High Loads) IOUT = 300mA IOUT = 1A 1.790 1.795 1.800 1.805 1.810 1.815 1.820 0 20 40 60 80 100 120 140 160 180 200 OUTPUT VOLTAGE (V) OUTPUT CURRENT (mA) Output Voltage vs. Output Current (DCM) VIN = 3.6V

Micrel, Inc. MIC23163/4 July 29, 2013 6 Revision 2.0 Typical Characteristics (Continued) 1.780 1.785 1.790 1.795 1.800 1.805 1.810 1.815 1.820 200 500 800 1100 1400 1700 2000 OUTPUT VOLTAGE (V) OUPUT CURRENT (mA) Output Voltage vs. Output Current (CCM) VIN = 3.6V 1.900 1.920 1.940 1.960 1.980 2.000 2.020 2.040 2.060 2.080 2.100 -40 -20 0 20 40 60 80 100 120 OUTPUT VOLTAGE (V) TEMPERATURE (°C) Output Voltage vs. Temperature VIN = 3.6V IOUT = 30mA PG THRESHOLD (% OF VREF) INPUT VOLTAGE (V) PG Thresholds vs. Input Voltage PG RISING PG FALLING PG DELAY TIME (µS) INPUT VOLTAGE (V) PG Delay Time vs. Input Voltage PG RISING PG FALLING 2.46 2.48 2.5 2.52 2.54 2.56 2.58 -40 -20 0 20 40 60 80 100 120 UVLO THRESHOLDS (V) TEMPERATURE (°C) UVLO Thresholds vs. Temperature UVLO ON UVLO OFF 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 ENABLE THRESHOLD (V) INPUT VOLTAGE (V) Enable Thresholds vs. Input Voltage TCASE = 25°C 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 -40 -20 0 20 40 60 80 100 120 ENABLE THRESHOLDS (V) TEMPERATURE (°C) Enable Threshold vs. Temperature VIN = 3.6V 100 1000 10000 1 10 100 1000 10000 SW FREQUENCY (kHz) OUPUT CURRENT (mA) Switching Frequency vs. Output Current VIN = 5V VIN = 3.6V 0.680 0.685 0.690 0.695 0.700 0.705 0.710 0.715 0.720 -40 -20 0 20 40 60 80 100 120 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) Feedback Voltage vs. Temperature

Micrel, Inc. MIC23163/4 July 29, 2013 7 Revision 2.0 Typical Characteristics (Continued) 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 -40 -20 0 20 40 60 80 100 120 SHUTDOWN CURRENT (µA) TEMPERATURE (°C) Shutdown Current vs. Temperature

Micrel, Inc. MIC23163/4 July 29, 2013 8 Revision 2.0 Functional Characteristics

Micrel, Inc. MIC23163/4 July 29, 2013 9 Revision 2.0 Functional Characteristics (Continued)

Micrel, Inc. MIC23163/4 July 29, 2013 10 Revision 2.0 Functional Characteristics (Continued)

Figure 1. Simplified MIC23163/4 Functional Block Diagram − Adjustable Output Voltage

overshooting at start up. Do not leave the EN pin floating. routed away from sensitive nodes whenever possible. Recommendations” section for details. the “PCB Layout Recommendations” section for details. recommended value for CSS is 1nF. voltage option (no internal connection for fixed options). reference within the regulation loop. R1 is the top resistor, R2 is the bottom resistor. Table 1. Example Feedback Resistor Values

Micrel, Inc. MIC23163/4 July 29, 2013 13 Revision 2.0

Application Information

The MIC23163/4 is a high- performance D C/DC step - down 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. 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 c apacitor 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. 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. 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) The MIC23163/4 is designed for use with a 0.47µH inductor. This allows for rapid output voltage recovery during line and load transients. 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: −+= Lf2 /VV1VII INOUT OUTOUTPEAK Eq. 2 As shown by Equation 2, the peak inductor current is inversely proportional to the switching fr equency 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. The transition between high loads (CCM) to HLL mode is determined by the inductor ripple current and the load current.

Figure 2. Signals for High-Side Switch Drive (HSD) for TON

Figure 4. SW Frequency vs. Output Current

Micrel, Inc. MIC23163/4 July 29, 2013 16 Revision 2.0 Typical Application Circuit Bill of Materials Item Part Number Manufacturer Description Qty. C1608X5R0J475K TDK(7) 4.7µF, 6.3V, X5R, Size 0603 1 GRM188R60J475KE19D Murata(8) C1608X5R0J106K080AB TDK 10µF, 6.3V, X5R, Size 0603 1 GRM188R60J106ME84D Murata GRM188R71H102MA01D Murata 1nF/50V, X7R, 0603 1 06035C102KAT2A AVX(9) 06035A150KAT2A AVX 15pF, 50V, 0603 1 GRM1885C1H150JA01D Murata R1 CRCW0603301KFKEA Vishay(10) 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 MIC23163YMT Micrel, Inc.(11) 4MHz, 2A, 100% Duty Cycle Buck Regulator with HyperLight Load® and Power Good 1 MIC23164YMT Notes: 7. TDK: www.tdk.com. 8. Murata: www.murata.com. 9. AVX: www.avx.com. 10. Vishay: www.vishay.com.

Micrel, Inc. MIC23163/4 July 29, 2013 17 Revision 2.0 PCB Layout Recommendations Top Layer Bottom Layer

Micrel, Inc. MIC23163/4 July 29, 2013 18 Revision 2.0 Package Information(12) and Recommended Landing Pattern 10-Pin 2mm × 2mm DFN (MT) Note:

Micrel, Inc. MIC23163/4 July 29, 2013 19 Revision 2.0 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.