DATA SHEET SKY87222: Dual Step-Down DC-DC Converter Applications Description Wi-Fi systems The SKY87222 is a dual, 1.2 MHz, Constant On-time (COT) synchronous step-down DC-DC converter. The SKY87222 provides a fixed output voltage of 1.8 V and an adjustable output voltage from 0.6 V to 3.3 V from input voltage ranging from 2.7 V to 5.0 V. The SKY87222 provides excellent line and load regulation along with high light load efficiency. Access points Laptops/ultra-books Features VIN range: 2.7 V to 5.0 V OUT1: fixed 1.8 V at 500 mA OUT2: adjustable from 0.6 V to 3.3 V at 1.5 A 1.2 MHz switching frequency 92% peak efficiency (OUT1) 80% light load efficiency EN and Power Good for power sequencing Cycle-by-cycle over-current protection Over-temperature protection Control loop stabilization with low ESR ceramic capacitors The Constant On-time control allows for easy loop stabilization with minimal external components while providing fast transient response. Power sequencing is available via EN pins along with a Power Good pin. The SKY87222 has cycle-by-cycle current limit and thermal shutdown to protect against fault conditions. The SKY87222 is available in a Pb-free, low-profile, 17-pin 2.0 mm 2.5 mm Quad Flat No-Lead (QFN) package, and rated over the 40 C to 85 C temperature range. A typical application circuit is shown in Figure 1. The pin configurations are shown in Figure 2. Pin assignments and pin descriptions are provided in Table 1. Internal soft start 40 C to 85 C operating temperature range. Low profile QFN (17-pin, 2.0 mm 2.5 mm) package (MSL1, 260 ºC per JEDEC J-STD-020) Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 1 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER SKY87222 VIN 2.7 V to 5.0 V C1 10 μF C2 10 μF SW1 VIN OUT1 1.5 μH C3 10 μF VOUT1 1.8 V / 500 mA Power Good PG1 EN1 EN2 ENABLE 1 ENABLE 2 L1 VIN L2 SW2 GND OUT2 GND FB2 1.0 μH R1 210 kΩ C4 10 μF C5 10 μF VOUT2 1.23 V / 1.5 A R2 200 kΩ t0511 Figure 1. SKY87222 Typical Application Circuit 14 13 VIN VIN 11 VIN 12 VIN SW2 SW2 1 15 10 SW1 9 GND 8 OUT1 GND GND 2 16 GND 6 7 17 5 3 4 OUT2 FB2 EN2 PG1 EN1 t0287 Figure 2. SKY87222 Pinout – 17-Pin，2.0 mm 2.5 mm QFN (Top View) Table 1. SKY87222 Pin Descriptions Pin Name I/O Description SW2 O Switch node for buck converter 2. Internally connected to an NMOS switch to GND and a PMOS switch to VIN. The SW2 pin is high impedance when EN2 is low. Connect to the inductor for the buck converter 2. 2, 16 GND - Power ground for buck converter 2. 3 OUT2 I Output sense pin for buck converter 2. FB2 I Feedback voltage pin for buck converter 2. Adjust the output voltage of buck converter 2 according to the ratio of the feedback resistors. EN2 I Buck converter 2 Enable. Active high enable input. Connect to VIN or a logic high for normal operation. Connect to GND or a logic low for shutdown mode. PG1 O Power Good pin for buck converter 1. Open drain with internal pull up resistor. EN1 I Buck converter 1 Enable. Active high enable input. Connect to VIN or logic high for normal operation. Connect to GND or a logic low for shutdown mode. 8 OUT1 I Output sense pin for buck converter 1. 9, 17 GND - Power ground for buck converter 1. SW1 O Switch node for buck converter 1. Internally connected to an NMOS switch to GND and a PMOS switch to VIN. The SW1 pin is high impedance when EN1 is low. Connect to the inductor for buck converter 1. VIN I Power supply pins for the buck converter 1 and the buck converter 2. Note VIN must be connected to the same supply source. 1, 15 4 5 6 7 10 11, 12, 13, 14 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Electrical and Mechanical Specifications electrical specifications are provided in Table 4. Typical performance characteristics of the SKY87222 are shown in Figures 3 through 45. The absolute maximum ratings of the SKY87222 are provided inTable 2, the thermal information is listed in Table 3, and Table 2. SKY87222 Absolute Maximum Ratings (Note 1) Parameter Symbol Minimum Maximum Units VIN to GND VIN 0.3 +5.5 V GND (pins 9, 17) to GND (pins 2, 16) VGND 0.3 +0.3 V SW1 to GND (pins 9, 17), SW2 to GND (pins 2, 16) VSW1, VSW2 0.3 VIN + 0.3 V OUT1, OUT2, FB2, PG1, EN1, EN2 to GND VOUT1, VOUT2, VFB2, VPG1, VEN1, VEN2 0.3 +5.5 V Maximum continuous current for SW1 ISW1(MAX) 500 mA Maximum continuous current for SW2 ISW2(MAX) 1500 mA Junction operating temperature TJ 40 +150 ºC Storage temperature TS 65 +150 ºC Maximum soldering temperature (at leads, 10 seconds) TLEAD 260 ºC Note 1: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal value. Exceeding any of the limits listed may result in permanent damage to the device. Table 3. SKY87222 Thermal Information Parameter Symbol Value Units Thermal resistance, junction to ambient (Note 1, Note 2) JA 72 ºC/W Maximum power dissipation (at 25 C) PD 1.7 W Note 1: Mounted on an FR4 board. Two-layer, 1 ounce copper. Note 2: The thermal resistance is measured in accordance with EIA/JESD 51 series. CAUTION: Although this device is designed to be as robust as possible, electrostatic discharge (ESD) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 3 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Table 4. SKY87222 Electrical Specifications (1 of 2) (Note 1) (VOUT1 = 1.8 V, VOUT2 = 1.23 V, VIN = 3.3 V, VEN1 = VEN2 = 3.3 V, C1 = C2 = 10 F, C3 = 10 F, C4 = C5 = 10 F, L1 = 1.5 H, L2 = 1.0 H, R1 = 210 k, R2 = 200 k, TA = –40 C to +85C, Typical Values are at TA = 25 C, Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units 5.0 V 2.7 V Operation Operating input voltage VIN 2.7 VIN rising Input under-voltage lockout Quiescent supply current Shutdown supply current 2.3 2.5 VIN_UVLO IQ ISHDN Hysteresis 400 mV Both step-down converters enabled, No load, no switching 80 A OUT1 enabled, No load, no switching. VEN1 =3.3 V, VEN2 = 0 V, VOUT1 = 1.95 V 60 A OUT2 enabled, No load, no switching. VEN2 = 3.3 V, VEN1 = 0 V, VFB2 = 0.63 V 60 VIN = 5.0 V, VEN1 = VEN2 = 0 V A 1 A Step-Down Converter 1 IOUT1 = 10 mA Output voltage (Note 2) VOUT1_REG Voltage accuracy, VIN = 3.0 V to 3.6 V IOUT1 = 100 mA to 500 mA Load regulation VOUT/IOUT IOUT1 = 100 mA to 500 mA, VIN = 3.3 V, VOUT1 = 1.8 V Line regulation VOUT/VIN IOUT1 = 400 mA, VIN = 3.0 V to 3.6 V, VOUT1 = 1.8 V Internal high-side PMOS On resistance 1.800 3 +3 % 0.005 %/mA 0.1 %/V RDS(ON)P 180 m Internal low-side NMOS On resistance RDS(ON)N 120 m Over-current threshold IOCP 1.2 A SW1 pin leakage current ISW1_LKG On time tON Minimum Off time tOFF_MIN Switching frequency fSW 0.01 VIN = 5.0 V, VOUT1 = 1.8 V 300 ns VIN = 3.3 V, VOUT1 = 1.8 V 455 ns 30 ns 1.2 MHz VIN = 3.3 V, VOUT1 = 1.8 V, IOUT1 = 350 mA Soft start time period tSS 2 A VSW1 = 0 V and 5.0 V, VIN = 5.0 V VIN = 3.0 V to 3.6 V, VOUT1 = 1.8 V, fSW = 1.2 MHz, L1 = 1.5 H, IOUT1 decreasing PSM threshold 75 mA Hysteresis 25 mA VIN = VEN1 = 0 V to 3.3 V, RLOAD = 9 (200 mA), time to VOUT1 = 0.9 VOUT1_REG 300 s VIN > VIN_UVLO, VEN1 = 0 V to 3.3 V, RLOAD = 9 (200 mA), time to VOUT1 = 0.9 VOUT1_REG 300 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 V July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D 400 s DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Table 4. SKY87222 Electrical Specifications (2 of 2) (Note 1) (VOUT1 = 1.8 V, VOUT2 = 1.23 V, VIN = 3.3 V, VEN1 = VEN2 = 3.3 V, C1 = C2 = 10 F, C3 = 10 F, C4 = C5 = 10 F, L1 = 1.5 H, L2 = 1.0 H, R1 = 210 k, R2 = 200 k, TA = –40 C to +85C, Typical Values are TA = 25 C, Unless Otherwise Noted) Parameter Symbol Test Condition Min Typical Max Units 3.3 V 0.6 0.609 V Step-Down Converter 2 Output voltage VOUT2 Feedback voltage VFB2 3.0 V VIN 3.6 V, TA = 0 C to 70 C Feedback bias current IFB2 VFB2 = 0.6 V Load regulation VOUT/IOUT IOUT2 = 250 mA to 1500 mA, VIN = 3.3 V, VOUT2 = 1.23 V Line regulation VOUT/VIN IOUT2 = 1000 mA, VIN = 3.0 V to 3.6 V, VOUT2 = 1.23 V Internal high-side PMOS On resistance RDS(ON)P Internal low-side NMOS On resistance RDS(ON)N Over-current threshold IOCP SW2 pin leakage current ISW2_LKG On time tON Minimum Off time tOFF_MIN Switching frequency fSW 0.6 0.591 10 nA 0.005 %/mA 0.1 %/V 90 m 60 m 2.75 A 0.01 205 ns VIN = 3.3 V, VOUT2 = 1.23 V 311 ns 30 ns VIN = 3.3 V, VOUT2 = 1.23 V, IOUT2 = 1.0 A 1.2 MHz VIN = 3.0 V to 3.6 V, VOUT2 = 1.23 V, fSW = 1.2 MHz, L2 = 1.0 H, IOUT2 decreasing PSM threshold Soft start time period tSS 2 A VSW2 = 0 V and 5.0 V, VIN = 5.0 V VIN = 5.0 V, VOUT2 = 1.23 V 200 mA Hysteresis 50 mA VIN = VEN2 = 0 V to 3.3 V, RLOAD = 6 (200 mA), time to VOUT2 = 0.9 VOUT2_REG 300 s VIN > VIN_UVLO, VEN2 = 0 V to 3.3 V, RLOAD = 6 (200 mA), time to VOUT2 = 0.9 VOUT2_REG 300 400 s Logic Input high threshold VIH EN1, EN2 Input low threshold VIL EN1, EN2 Logic input pull-down resistance RPD EN1, EN2 pins 1.2 V 0.4 1 2 V M Power Good (PG1) PG1 upper threshold VPG1_HI 1.1 VOUT1_REG V PG1 lower threshold VPG1_LO 0.9 VOUT1_REG V PG1 delay tPG1_DLY Delay from OUT1 in regulation to PG1 going high PG1 output low VOL IOL = 2 mA PG1 internal pull-up resistor RPG1_PU Pull-up resistor to VIN 90 μs 0.4 500 V k Protection Thermal shutdown TSD 140 C Thermal shutdown hysteresis TSD_HYS 30 C Note 1: Performance is guaranteed only under the conditions listed in this table and is not guaranteed over the full operating or storage temperature ranges. Operation at elevated temperatures may reduce reliability of the device. Note 2: Min and Max limits are specified by design, test, or statistical analysis. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 5 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Typical Performance Characteristics (VOUT1 = 1.8 V, VOUT2 = 1.23 V, VIN = 3.3 V, VEN1 = VEN2 = 3.3 V, C1 = C2 = 10 F, C3 = 10 F, C4 = C5 = 10 F, L1 = 1.5 H, L2 = 1.0 H, R1 = 210 k, R2 = 200 k, TA = –40 C to +85C, Typical Values are TA = 25 C, Unless Otherwise Noted) 95 85 75 75 65 65 Efficiency (%) 85 55 VIN = 2.7 V VIN = 3 V VIN = 3.3 V VIN = 3.6 V VIN = 4.2 V VIN = 5 V 35 25 15 5 0.01 0.1 1 10 100 55 45 VIN = 2.7 V VIN = 3 V VIN = 3.3 V VIN = 3.6 V VIN = 4.2 V VIN = 5 V 35 25 15 t0513 45 t0512 Efficiency (%) 95 5 0.01 1000 0.1 1 180 180 25 ºC Quiescent Current (μA) 25 ºC 140 –40 ºC 160 –40 ºC 160 85 ºC 120 100 80 60 140 85 ºC 120 100 80 60 t0468 20 2.7 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 20 2.7 5.0 t0469 40 40 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 5.0 Input Voltage (V) Input Voltage (V) Figure 6. Quiescent Current vs Input Voltage (Buck 1 Turn-On; No Load; Non-Switching) Figure 5. Quiescent Current vs Input Voltage (Both Bucks Turn-On; No Load; Non-Switching) 1 180 0.9 140 Shutdown Current (μA) 25 ºC 85 ºC 120 100 80 60 20 2.7 t0470 40 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 Input Voltage (V) Figure 7. Quiescent Current vs Input Voltage (Buck 2 Turn-On; No Load; Non-Switching) 4.8 5.0 –40 ºC 0.8 25 ºC 0.7 85 ºC 0.6 0.5 0.4 0.3 0.2 0.1 0 -0.1 2.7 t0471 –40 ºC 160 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 Input Voltage (V) Figure 8. Shutdown Current vs Input Voltage (Both Bucks Turn-Off) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 10000 1000 Figure 4. Buck 2 Efficiency vs Output Current Figure 3. Buck 1 Efficiency vs Output Current Quiescent Current (μA) 100 Output Current (mA) Output Current (mA) Quiescent Current (μA) 10 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D 5.0 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER 0.7 0.5 0.63 0 0.42 0.35 0.28 0.21 VIN = 2.7 V VIN = 3.3 V 0.14 150 200 -1.5 VIN = 2.7 V VIN = 3.3 V VIN = 5 V t0466 0 100 -1 -2 VIN = 5 V 0.07 -0.5 250 300 350 400 450 -2.5 250 500 375 500 t0467 0.49 Output Error (%) Output Error (%) 0.56 625 230 210 154 190 170 150 130 50 2.7 –40 ºC 25 ºC 3.2 3.4 3.6 3.9 4.1 89 4.3 4.5 4.8 5.0 25 ºC 85 ºC 2.9 3.2 3.4 90 80 70 60 3.2 3.4 3.6 3.9 4.1 4.3 4.5 80 70 60 50 40 –40 ºC 30 25 ºC 20 85 ºC 2.9 4.1 4.3 4.5 4.8 Input Voltage (V) Figure 13. Buck 2 High-Side PMOS On-Resistance (ISW = 300 mA) 5.0 10 2.7 85 ºC 2.9 3.2 t0475 Turn-On Resistance (mΩ) 100 t0474 Turn-On Resistance (mΩ) 90 2.7 3.9 Figure 12. Buck 1 Low-Side NMOS On-Resistance (ISW = 300 mA) 110 20 3.6 Input Voltage (V) 100 30 5.0 –40 ºC 76 120 25 ºC 4.8 102 130 40 1500 115 50 2.7 Figure 11. Buck 1 High-Side PMOS On-Resistance (ISW = 300 mA) –40 ºC 1375 128 Input Voltage (V) 50 1250 141 63 85 ºC 2.9 1125 t0473 Turn-On Resistance (mΩ) 180 167 t0472 Turn-On Resistance (mΩ) 250 70 1000 Figure 10. Buck 2 Load Regulation Figure 9. Buck 1 Load Regulation 90 875 Output Current (mA) Output Current (mA) 110 750 3.4 3.6 3.9 4.1 4.3 4.5 4.8 5.0 Input Voltage (V) Figure 14. Buck 2 Low-Side NMOS On-Resistance (ISW = 300 mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 7 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER 1.5 1.40 Switching Frequency (MHz) 1.25 1.20 1.15 1.10 –40 ºC 25 ºC 1.05 1.00 2.7 85 ºC 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 1.4 1.3 1.2 –40 ºC 1.1 25 ºC 85 ºC 1 2.7 5.0 2.9 3.2 t0477 1.30 t0476 Switching Frequency (MHz) 1.35 3.4 Output Voltage (V) 4.8 5.0 1.812 4.8 5.0 1.7896 1.786 1.7824 –40 ºC –40 ºC 1.7788 25 ºC 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 25 ºC 85 ºC t0478 85 ºC 1.7752 2.7 5.0 2.9 3.2 t0479 1.816 1.808 3.4 0.61 –40 ºC 0.608 –40 ºC 0.606 25 ºC 0.606 25 ºC 0.604 85 ºC 0.604 85 ºC 0.602 0.6 0.598 0.596 0.6 0.596 0.592 t0480 0.594 3.9 4.1 4.5 0.598 0.592 3.6 4.3 0.602 0.594 3.4 4.1 4.3 4.5 4.8 5.0 Input Voltage (V) Figure 19. Buck 1 Feedback Voltage (Test Mode in Open Loop) 0.59 2.7 t0481 FB Voltage (V) 0.61 0.608 3.2 3.9 Figure 18. Buck 1 VOUT vs VIN (VIN = 3.3 V, IOUT = 500 mA) Figure 17. Buck 1 VOUT vs VIN (VIN = 3.3 V, IOUT = 10 mA) 2.9 3.6 Input Voltage (V) Input Voltage (V) 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 5.0 Input Voltage (V) Figure 20. Buck 2 Feedback Voltage (Test Mode in Open Loop) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 4.5 1.7932 1.82 Output Voltage (V) 4.3 1.7968 1.824 FB Voltage (V) 4.1 Figure 16. Buck 2 VIN vs Frequency (VOUT=1.23 V, IOUT = 1 A) Figure 15. Buck 1 VIN vs Frequency (VOUT=1.8 V, IOUT = 350 mA) 0.59 2.7 3.9 Input Voltage (V) Input Voltage (V) 1.804 2.7 3.6 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D 1.2 1.2 1.1 1.1 1 1 EN Voltage (V) 0.9 0.8 0.7 –40 ºC 0.8 0.7 –40 ºC 0.6 25 ºC 25 ºC 85 ºC 0.4 2.7 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 0.5 t0482 0.5 85 ºC 0.4 2.7 5.0 2.9 3.2 3.4 Input Voltage (V) 3.9 4.1 4.3 4.5 4.8 5.0 Input Voltage (V) Figure 21. Enable Logic Voltage vs Input Voltage Figure 22. Disable Logic Voltage vs Input Voltage 3600 2000 3400 1800 3200 Current Limit (mA) 1900 1700 1600 1500 1400 1300 –40 ºC 1200 25 ºC 1100 85 ºC 1000 2.7 2.9 3.2 3000 2800 2600 –40 ºC 2400 25 ºC 2200 t0484 Current Limit (mA) 3.6 t0483 0.6 0.9 3.4 3.6 3.9 4.1 4.3 4.5 4.8 85 ºC 2000 2.7 5.0 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 t0485 EN Voltage (V) DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER 5.0 Input Voltage (V) Input Voltage (V) Figure 24. Buck 2 PMOS Peak Current Limit Figure 23. Buck 1 PMOS Peak Current Limit SW1 SW1 2 Voltage (V) Voltage (V) 2 0 0.02 0 0 0.02 0 VOUT1 (AC) VOUT1 (AC) t0487 t0486 Time (2.0 μs/div) Figure 25. Buck 1 Output Ripple (VIN = EN = 3.3 V, VOUT = 1.8 V, IOUT = 10 mA) Time (1.0 μs/div) Figure 26. Buck 1 Output Ripple (VIN = EN = 3.3 V, VOUT = 1.8 V, IOUT = 250 mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 9 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER SW2 SW2 2 2 Voltage (V) Voltage (V) 0 0.02 0 0 0.02 0 VOUT2 (AC) VOUT2 (AC) t0489 t0488 Time (1.0 μs/div) Time (20.0 μs/div) Figure 28. Buck 2 Output Ripple (VIN = EN = 3.3 V, VOUT = 1.23 V, IOUT = 750 mA) Figure 27. Buck 2 Output Ripple (VIN = EN = 3.3 V, VOUT = 1.23 V, IOUT = 10 mA) 0 0.5 -0.1 0.45 -0.2 -0.3 Output Error (%) 0.35 0.3 0.25 -0.4 -0.5 -0.6 -0.7 0.2 -0.8 0.15 -0.9 t0490 0.1 2.7 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 -1 2.7 5.0 t0491 Output Error (%) 0.4 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 5.0 Input Voltage (V) Input Voltage (V) Figure 30. Buck 2 Output Line Regulation (VOUT2 = 1.23 V, IOUT = 1 A) Figure 29. Buck 1 Output Line Regulation (VOUT1 = 1.8 V, IOUT = 400 mA) VIN 2 1 VOUT1 0 Voltage (V) 0 EN1 Current (mA) Current (mA) Voltage (V) 2 0 1 VOUT1 0 100 IOUT1 0 100 IOUT1 0 t0493 t0492 Time (100 μs/div) Time (100 μs/div) Figure 31. Buck 1 Output Cold Start (VIN = EN = 0 to 3.3 V, VOUT = 1.8 V, RLOAD = 9 ) Figure 32. Buck 1 Output Soft Start (VIN = 3.3 V, EN = 0 to 3.3 V, VOUT = 1.8 V, RLOAD = 9 ) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER EN1 2 0 Voltage (V) Voltage (V) EN1 1 0 VOUT1 SW1 1 0 1 0 t0495 t0494 Time (400 ns/div) Time (1.0 ms/div) Figure 34. Buck 1 Output Disable Delay (VOUT = 1.8 V, IOUT = 250 mA) Figure 33. Buck 1 Output Turn-Off (VOUT = 1.8 V, IOUT = 5 mA) VIN 2 0.5 VOUT2 0 Current (mA) 0 Voltage (V) EN2 Current (mA) Voltage (V) 2 0 1 VOUT2 0 100 IOUT2 100 0 IOUT2 0 t0496 t0497 Time (100 μs/div) Time (100 μs/div) Figure 35. Buck 2 Output Cold Start (VIN = EN = 0 to 3.3 V, VOUT = 1.23 V, RLOAD = 6 ) Figure 36. Buck 2 Output Soft Start (VIN = 3.3 V, EN = 0 to 3.3 V, VOUT = 1.23 V, RLOAD = 6 ) EN2 2 Voltage (V) Voltage (V) EN2 1 0 0 SW2 1 VOUT2 0 1 0 t0498 Time (1.0 ms/div) Figure 37. Buck 2 Output Turn-Off (VOUT = 1.23 V, IOUT = 5 mA) t0499 Time (400 ns/div) Figure 38. Buck 2 Output Disable Delay (VOUT = 1.23 V, IOUT = 750 mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 11 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER EN2 EN2 IOUT2 100 0 VOUT2 Voltage (V) 1 0 Current (mA) Voltage (V) 1 0 VOUT2 0.5 0 t0501 t0500 Time (100 μs/div) Time (100 μs/div) Figure 40. Buck 2 Output Pre-bias Turn-off (VOUT from 1.23 V to 1.1 V Pre-bias, IOUT = 5 mA) Figure 39. Buck 2 Pre-bias Soft Start (VOUT from 1.1 V Pre-bias to 1.23 V, IOUT = 200 mA) IOUT1 Voltage (mV) Voltage (mV) VOUT1 (AC) 0 20 VOUT1 (AC) 0 Current (mA) 20 Current (mA) 0 200 IOUT1 100 0 t0515 t0502 Time (100 μs/div) Time (100 μs/div) Figure 41. Buck 1 10% to 50% Load Transient (VOUT = 1.8 V, IOUT = 50 to 250 mA within 1.0 s) Figure 42. Buck 1 10% to 100% Load Transient (VOUT = 1.8 V, IOUT = 50 to 500 mA within 1.0 s) IOUT2 0 Voltage (mV) 0 20 500 0 50 0 VOUT2 (AC) VOUT2 (AC) t0516 t0508 Time (100 μs/div) Time (100 μs/div) Figure 43. Buck 2 10% to 50% Load Transient (VOUT = 1.23 V, IOUT = 150 to 750 mA within 1.0 s) Figure 44. Buck 2 10% to 100% Load Transient (VOUT = 1.23 V, IOUT = 150 to 1500 mA within 1.0 s) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 12 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D Current (mA) 200 Current (mA) Voltage (mV) IOUT2 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER EN1 Voltage (V) 2 0 VOUT1 1 0 2 0 PG1 t0514 Time (100 μs/div) Figure 45. PG1 Delay (VIN = 3.3 V, EN = 0 to 3.3 V, VOUT = 1.8 V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 13 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER VIN EN1 VIN Bias, Reference, UVLO, and Soft Start + – VREF EN2 + + COMP – On-Time control and LOGIC DRV RAMP circuit SW1 OUT1 VIN 0.66 V + + – – GND + 0.54 V – PG1 GND VIN Thermal Shutdown VREF FB2 + + – + COMP – On-Time control and LOGIC DRV SW2 RAMP circuit OUT2 + – GND t0288 Figure 46. SKY87222 Functional Block Diagram Functional Description The SKY87222 is a dual DC-DC step-down converter with one fixed and one adjustable voltage output, and utilizes an adaptive fixed on-time control. A Constant On-time control architecture offers a simpler control loop and faster transient response than a fixed frequency Pulse Width Modulation (PWM) control architecture. A functional block diagram is shown in Figure 46. The Constant On-time converter maintains a constant output frequency because the “on” time is inversely proportional to the supply voltage. As the input voltage decreases, the “on” time increases, maintaining a relatively constant period. The device is enabled using the EN input. When the EN pin is pulled high, the converter starts up under the control of a soft start routine. Under light load conditions, the switch enters pulse-skipping mode to ensure regulation is maintained. This effectively changes the switching frequency. To maintain a wide input voltage range, the switching period is extended when either the minimum “off” or “on” time is reached. The frequency is also affected when switching operates in discontinuous mode. The “on” time of the switching pulses can be estimated using the following equation: tON VOUT 0.833 s VIN The minimum off time is fixed at 30 ns to prevent runaway inductor current during load transients. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 14 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Constant On-Time (COT) Operation time”, the high-side MOSFET remains on until the high-side current reaches a pre-determined threshold. At this time, the high-side switch turns off and the low-side switch turns on. The low-side switch remains on until the low-side current reaches zero. At this point, the low-side MOSFET is turned off, which prevents the current from going negative. Both the high-side MOSFET and the low-side MOSFETs remain off with the output capacitor supplying the load current until the feedback voltage goes below the reference voltage, triggering a new switching cycle. The switching frequency decreases in light load conditions. In normal continuous conduction mode, where the inductor current (IL) never reaches zero, the high-side MOSFET is turned on for a fixed interval (tON) determined by the COT sub-circuit (a one-shot timer) within the PWM Control and Logic functional block. During that fixed interval, the inductor current starts to ramp up. At the end of the tON period, the high-side MOSFET is turned off and the low-side MOSFET is turned on causing the inductor current to ramp down. At this point, the voltage on the FB pin (VFB) goes below the reference voltage (VREF) on the comparator, which restarts the one-shot timer and initiates the next cycle. The ideal tON time in continuous conduction mode is determined by the following relationships: DutyCycle( D ) In discontinuous conduction mode, the SKY87222 uses a passive damping scheme to reduce the amplitude and duration of ringing that occurs at the switching node (LX). VOUT VIN OnTime( tON ) D Enable and Soft Start When input voltage is greater than the Under-Voltage Lockout (UVLO) threshold, either channel of the SKY87222 is enabled by pulling the EN pin higher than 1.2 V. If the EN pin is left floating or pulled down to ground, the regulator is disabled. There is an internal 1.5 M resistor from the EN pin to ground. 1 f SW If switching frequency (fSW) = 1.2 MHz, the on-time equation can be rewritten as: tON The SKY87222 soft-start control prevents output voltage overshoot and limits inrush current when either the input power or the enable input is applied. If the SKY87222’s input and enable are brought up together (normally occurs on the initial power-up) the SKY87222 ramps up the output voltage with a controlled slew rate of 300 s. Pulling the EN pin low forces the respective converter into a low-power, non-switching state, and forces the switching node into a high-impedance disabled state within 10 s of disabling the channel. V OUT 0.833 s VIN The COT circuit generates an “on” time proportional to the ideal duty cycle and holds the switching frequency constant. However, due to nonlinearities in the COT circuit, propagation delays, and non-ideal switch voltage drops due to output current loads, the actual operating frequency will vary slightly. When both EN signals are pulled low, the respective SKY87222 is forced into a shutdown state that draws less than 1 A of quiescent current. Light Load Operation The SKY87222 transitions to discontinuous conduction mode (DCM) automatically when DC load currents are less than the PSM threshold. When this happens, the SKY87222 monitors the current in the high-side and low-side MOSFETs. During the “on Figure 47 shows the soft start and shutdown timing. VIN_UVLO VIN VIN_UVLO ISHDN ISHDN EN1 and/or EN2 tDIS tSS = 300 μs tOFF tSS = 300 μs tDIS tOFF OUT1 and/or OUT2 Soft start ramp Both outputs shutdown t0289 Figure 47. Soft Start and Shutdown TIming Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 15 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Power Good Pin (PG1) The SKY87222 has an open-drain, with a 500 k pull-up resistor, Power Good indicator pin (PG1). When the OUT1 pin is within ±10 percent of regulation voltage, the PG1 pin is pulled up to VIN by the internal resistor. If the OUT1 pin voltage is not within ±10 percent of regulation voltage, the PG1 pin is pulled down to ground by an internal MOSFET. The MOSFET has a maximum RDS(ON) of less than 200 . Current Limit and Short Circuit Protection The SKY87222 includes overload protection. The protection turns off the high-side switch when the output current exceeds the over-current threshold of 1.2 A (typ.) for OUT1 or 2.75 A (typ.) for OUT2. The SKY87222 enters the short-circuit protection mode when the output current hits the current limit. The device tries to recover from the short circuit by entering a “hiccup” mode, in which the regulator disables the output power stage, discharges the soft-start capacitor, and automatically tries a soft start again. If the short-circuit condition still holds on after a soft start ends, the SKY87222 repeats this protection operation cycle until the short circuit disappears and the output rises back to the regulation level. IL = Peak-peak inductor ripple current fSW = Switching frequency L = Inductor value Lower ripple current reduces core losses in the inductor, Equivalent Series Resistance (ESR) losses in the output capacitors, and output voltage ripple. Highest efficiency operation is obtained at low frequency with a small ripple current. However, achieving this requires a large inductor. There is a trade-off between component size, efficiency, and operating frequency. A reasonable starting point is to choose a ripple current of about 650 mA. The largest ripple current occurs at the highest input voltage, VIN. To guarantee that ripple current does not exceed a specified maximum, the inductance should be chosen according to the following relationship: L VOUT VIN VOUT 0.65 A f SW VIN where VIN = maximum input voltage. The selected inductance value needs to within ±20% of the calculated value or the PSM threshold may not work properly. The maximum inductor peak current is calculated according to: I PEAK I OUT(MAX) ΔI L 2 Thermal Protection Where: An over-temperature thermal shutdown circuit is provided to prevent damage to the IC under adverse operating conditions. An internal temperature monitoring circuit has a junction temperature shutdown threshold of 140 °C. Both converters are disabled during an over-temperature event, and the SKY87222 resets the soft start ramp to 300 s and automatically restarts when the temperature has fallen below 110 °C. IPEAK = Peak inductor current IL = Peak-peak inductor ripple current Fixed Output Voltage The SKY87222 has a fixed output voltage of 1.8 V for buck converter 1. The SKY87223 is recommended if an output voltage other than 1.8 V is required. Inductor Selection For OUT1, an inductor value of 1.5 H is recommended for most SKY87222 applications. For OUT2, inductor values from 0.47 H to 2.2 H are recommended. Given the desired input and output voltages, the inductor value and switching frequency determine the ripple current: I L Where: VOUT VIN VOUT L f SW VIN Manufacturer specifications typically list the inductor current rating based on the inductance change and on the temperature rise. The current that causes the inductance to drop by 30% is generally referred to as the saturation current. The current that causes the temperature to rise by 40 °C is generally referred to as the rms or heating current. Caution should be used when comparing inductors from different manufacturers — make sure that the current ratings are using the same criteria. The inductor current ratings are very important parameters for inductor selection. The ratings must be more than the peak inductor current, IPEAK; an adequate margin is important for a safe application. Always consider the losses associated with DCR and their effect on the total regulator efficiency when selecting an inductor. In general, the DCR of the inductor should be less than the RDS(ON) of the low-side FET of the associated converter. An inductor with high magnetic shield construction is also strongly recommended to suppress EMI noise. A list of suggested inductors is given in Table 5. Look for inductors that have the lowest DCR and an adequate current rating in a reasonably sized package. Check with the manufacturers for the latest offerings. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 16 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Place the output capacitors as close to the device and inductor as possible to reduce the switching noise and output ripple. PCB Layout Considerations The following guidelines should be applied to ensure proper performance when designing a PCB for the SKY87222: Use wide and short traces for high current paths. Place the input capacitors as close to the device as possible to reduce the input ripple. The feedback trace should be separated from any power trace and connected as close as possible to the load point for better load regulation. Table 5. Suggested Inductor Selection Part Number Value (H) DCR () ISAT (A) 30% drop IRMS (A) 40 °C rise PST25201B-R47MS 0.47 20% 0.025 typ. 3.9 typ 3.7 typ 0.029 max. 3.5 max 3.33 max PST25201B-1R0MS 1.0 20% PST25201B-1R5MS 1.5 20% PIFE25201B-R47MS 0.47 20% PIFE25201B-R50MS 0.50 20% PIFE25201B-1R0MS 1.0 20% PIFE25201B-1R5MS 1.5 20% PIFE25201B-2R2MS 2.2 20% LQM2HPNR47MJH# 0.47 20% LQM2HPNR68MGH# 0.68 20% LQM2HPN1R5MGH# 1.5 20% VLS252012T-R47N2R1 0.47 30% VLS252012T-1R0N1R7 1.0 30% VLS252012T-1R5N1R4 1.5 30% 0.037 typ 2.7 typ 2.6 typ 0.043 max 2.45 max 2.34 max 0.063 typ 2.3 typ 2.2 typ 0.072 max 2.07 max 1.98 max 0.023 typ 5.0 typ 4.5 typ 0.028 max 4.5 max 4.0 max 0.025 typ 4.8 typ 4.3 typ 0.030 max 4.32 max 3.87 max 0.045 typ 3.8 typ 3.1 typ 0.055 max 3.3 max 2.7 max 0.058 typ 2.9 typ 2.7 typ 0.070 max 2.61 max 1.43 max 0.086 typ 2. 5 typ 2.3 typ 0.105 max 2.2 max 2.0 max 0.037 typ 3.5 typ 3.4 typ 0.046 max 3.2 max 2.7 max 0.050 typ 4.0 typ 2.9 typ 0.063 max 3.8 max 2.3 max 0.065 typ 1.6 typ 2.6 typ 0.081 max 1.5 max 2.0 max 0.047 typ. 3.7 typ 0.056 max. 3.3 max 0.073 typ. 2.7 typ 0.088 max. 2.4 max 0.105 typ. 2.2 typ 0.126 max. 2.0 max Package (mm) Manufacturer 2.5 2.0 1.2 2.5 2.0 1.2 2.5 2.0 1.2 2.5 2.0 1.2 Cyntec 2.5 2.0 1.2 2.5 2.0 1.2 2.5 2.0 1.2 2.5 2.0 1.2 2.5 2.0 1.2 2.5 2.0 1.0 Murata 2.5 2.0 1.0 2.2 typ 2.5 2.0 1.2 1.8 typ 2.5 2.0 1.2 1.5 typ 2.5 2.0 1.2 TDK Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 17 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Evaluation Board Description The SKY87222 Evaluation Board is used to test the performance of the SKY87222 step-down DC-DC converter. An Evaluation Board schematic diagram is provided in Figure 48. Layer details VIN 3.0 V to 3.6 V U1 VIN C1 C2 EN1 10 μF 10 μF 6.3 V/X5R 6.3 V/X5R 3 2 1 GND 1 2 3 VIN VIN VIN VIN SW1 10 SW1 OUT1 8 OUT1 7 EN1 SW2 SW2 EN2 5 EN2 OUT2 3 6 PG1 FB2 4 2 16 GND GND GND GND GND R4 0Ω C3 10 μF 6.3 V/X5R L2 1.0 μH 15 1 EN1 PG1 VOUT1 1.8 V / 500 mA L1 1.5 μH PST25201B-1R5MS R3 GND EN2 SKY87222 QFN 0Ω C7 0.1 μF NC GND 11 12 13 14 for the SKY87222 Evaluation Board are shown in Figure 49. The Evaluation Board has additional components for easy evaluation; the actual bill of materials required for the system is shown in Table 6. PST25201B-1ROMS OUT2 R1 210 kΩ FB2 17 9 R2 C4 10 μF 4.0 V/X5R GND C5 10 μF 4.0 V/X5R GND 200 kΩ C8 0.1 μF NC VIN GND GND PG1 AGND t0510 Figure 48. SKY87222 Evaluation Board Schematic Bottom Layer Top Layer Top Layer Details t0507 Figure 49. SKY87222 Evaluation Board Layer Details Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 18 VOUT2 1.23 V/ 1.5 A GND July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Table 6. SKY87222 Evaluation Board Bill of Materials Component Part Number Description Manufacturer Ceramic capacitors, 10 F, 0603, X5R, 6.3 V, 20% Murata GRM155R60G106ME44# Ceramic capacitors, 10 F, 0402, X5R, 4.0 V, 20% Murata PST25201B-1R5MS Inductor, 1.5 H, 72 m, 1.98 A, 20% Cyntec PST25201B-1ROMS Inductor, 1.0 H, 43 m, 2.34 A, 20% Cyntec C1, C2, C3 GRM188R60J106ME84# C4, C5 L1 L2 R1 CRCW0201210KFNED Resistor, 210 k, 0201, 1/20 W, 1% Vishay R2 CRCW0201200KFNED Resistor, 200 k, 0201, 1/20 W, 1% Vishay R3, R4 CRCW04020000Z0ED Resistor, 0 , 0402, 1/16 W, 1% Vishay Package Information Typical case markings are shown in Figure 50. Package dimensions for the 17-pin QFN package are shown in Figure 51. Tape and reel dimensions are shown in Figure 52. Package and Handling Information Instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SKY87222 is rated to Moisture Sensitivity Level 1 (MSL1) at 260 C. It can be used for lead or lead-free soldering. For additional information, refer to the Skyworks Application Note, Solder Reflow Information, and document number 200164. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. Production quantities of this product are shipped in a standard tape and reel format. Pin 1 Indicator Skyworks Part # Lot # t0290 Figure 50. Typical Case Markings (Top View) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 19 DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Pin 1 indicator 0.100 × 45º 3× 0.500 ± 0.050 2 Pin 1 indicator A 0.050 M C A B B 3× 0.250 ± 0.050 2.5 2× 0.500 BSC 0.050 C 2× 0.050 M C A B 14× 0.400 ± 0.050 14× 0.250 ± 0.050 0.050 C 0.100 M C A B 0.050 M C Top View Bottom View 0.050 C C 0.550 ± 0.050 Seating plane 0.000 – 0.050 3 0.152 Ref. 0.080 C Notes: 1. All dimensions are in millimeters. 2. Plating requirement per source control drawing (SCD) 2504. 3. Coplanarity applies to the terminals and all other bottom surface metallization. Side View t0390 Figure 51. SKY87222 17-Pin QFN Package Dimensions 2.0 ± 0.1 (Note 1) 0.30 ± 0.05 4.0 ± 0.1 (Note 2) 1.75 ± 0.10 Ø1.55 ± 0.05 Ø1.0 Min. “X” Ref. 3º 12.00 ± 0.30 2.70 ± 0.10 (Note 1) 5.50 ± 0.10 Y Pin #1 Y 8.00 ± 0.10 0.2 5 0.80 ± 0.10 2.20 ± 0.10 Re Notes: 1. Measured from centreline of sprocket hole to centreline of pocket. 2. Cumulative tolerance of 10 sprocket holes is ±0.20 mm. 3. Other material available. 4. All measurements are in millimeters unless otherwise stated. f. 0 .1 0 user direction of unreeling Re f. R Section Y-Y View “X” t0292 Figure 52. SKY87222 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 20 July 24, 2014 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203070D DATA SHEET • SKY87222: DUAL STEP-DOWN DC-DC CONVERTER Ordering Information Model Name Manufacturing Part Number Evaluation Board Part Number SKY87222: Dual Step-Down Converter SKY87222-11-653LF SKY87222-11-653LF-EVB Copyright © 2013-2014 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. 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Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks and the Skyworks symbol are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 203070D • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 24, 2014 21