TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 1.2A High Efficient Step Down Converter with Snooze Mode Check for Samples: TPS62080, TPS62080A, TPS62081, TPS62082 FEATURES DESCRIPTION 1 • • • • • • • • • • • The TPS6208x devices are a family of high frequency synchronous step down converters. With an input voltage range of 2.3V to 6.0V, common battery technologies are supported. Alternatively, the device can be used for low voltage system power rails. TM DCS-Control Architecture for Fast Transient Regulation Snooze Mode for 6.5µA Ultra Low Quiescent Current 2.3V to 6.0V Input Voltage Range Supports High Output Capacitance up to 100µF 100% Duty Cycle for Lowest Dropout Power Save Mode for Light Load Efficiency Output Discharge Function Short Circuit Protection Power Good Output Thermal Shutdown Available in 2x2mm 8-Pin SON Package The TPS6208x focuses on high efficient step down conversion over a wide output current range. At medium to heavy loads, the converter operates in PWM mode and automatically enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range. To maintain high efficiency at very low load or no load currents, a Snooze Mode with an ultra low quiescent current is implemented, that is enabled by the Mode pin. This function increases the run-time of battery driven applications and keeps the standby current at its lowest level to meet green energy standards targeting for a low stand-by current. APPLICATIONS • • • To address the requirements of system power rails, the internal compensation circuit allows a large selection of external output capacitor values ranging from 10µF up to 100uF effective capacitance. With its DCS-ControlTM architecture excellent load transient performance and output voltage regulation accuracy is achieved. The device is available in 2x2mm SON package with Thermal PAD. Battery Powered Portable Devices Point of Load Regulators System Power Rail Voltage Conversion TPS62081 VIN 2.3V .. 6V POWER GOOD VIN PG EN SW 180k 1µH 10µF MODE GND VOS 1.8V VOUT 22µF FB Figure 1. Typical Application of TPS62081 (1.8V Fixed Output) 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2011–2013, Texas Instruments Incorporated TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com Table 1. ORDERING INFORMATION TA OUTPUT VOLTAGE (1) PACKAGE MARKING PACKAGE PART NUMBER (2) Adjustable QVR 8-Pin SON TPS62080DSG 1.8 V QVS 8-Pin SON TPS62081DSG 3.3 V QVT 8-Pin SON TPS62082DSG Adjustable SBN 8-Pin SON TPS62080ADSG –40°C to 85°C (1) (2) Contact the factory to check availability of other fixed output voltage versions. For detailed ordering information please check the PACKAGE OPTION ADDENDUM section at the end of this data sheet. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) Voltage range at VIN, PG, VOS VALUE UNIT –0.3 to 7 V –1 to 7 V –0.3 to 3.6 V –0.3 to (VIN + 0.3V) V 2 kV 500 V (2) Voltage range at SW (2) (3) Voltage range at FB (2) Voltage range at EN, MODE (2) ESD rating, Human Body Model ESD rating, Charged Device Model Continuous total power dissipation See Dissipation Rating Table Operating junction temperature range, TJ –40 to 150 °C Operating ambient temperature range, TA –40 to 85 °C Storage temperature range, Tstg –65 to 150 °C (1) (2) (3) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute–maximum–rated conditions for extended periods may affect device reliability. All voltage values are with respect to network ground terminal. During operation, device switching THERMAL INFORMATION THERMAL METRIC (1) DSG (8 PINS) θJA Junction-to-ambient thermal resistance 59.7 θJCtop Junction-to-case (top) thermal resistance 70.1 θJB Junction-to-board thermal resistance 30.9 ψJT Junction-to-top characterization parameter 1.4 ψJB Junction-to-board characterization parameter 31.5 θJCbot Junction-to-case (bottom) thermal resistance 8.6 (1) UNITS °C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. RECOMMENDED OPERATING CONDITIONS (1) MIN TYP MAX VIN Input voltage range, VIN 2.3 6.0 VOUT Output voltage range 0.5 4.0 ISNOOZE Maximum load current in Snooze Mode UNIT V V 2 mA TA Operating ambient temperature –40 85 °C TJ Operating junction temperature –40 125 °C (1) 2 Refer to the APPLICATION INFORMATION section for further information. Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 ELECTRICAL CHARACTERISTICS Over recommended free-air temperature range, TA = -40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted), VIN=3.6V, MODE = LOW. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VIN Input voltage range 2.3 6.0 V Quiescent current into VIN IOUT = 0mA, Device not switching 30 uA IQ Quiescent current into VIN (SNOOZE MODE) IOUT = 0mA, Device not switching, MODE=HIGH 6.5 uA ISD Shutdown current into VIN EN = LOW Under voltage lock out Input voltage falling 1.8 Under voltage lock out hysteresis Rising above VUVLO 120 mV Thermal shut down Temperature rising 150 °C Thermal shutdown hysteresis Temperature falling below TJSD 20 °C VUVLO TJSD 1 2.0 µA V LOGIC INTERFACE (ENABLE, MODE) VIH High level input voltage 2.3V ≤ VIN ≤ 6.0V VIL Low level input voltage 2.3V ≤ VIN ≤ 6.0V ILKG Input leakage current 1 V 0.4 V 0.01 0.5 µA –10 –5 % POWER GOOD VPG Power good threshold VOUT falling referenced to VOUT nominal –15 Power good hysteresis 5 VIL Low level voltage Isink = 500 µA IPG,LKG PG Leakage current VPG = 5.0 V % 0.3 V 0.1 µA 0.5 4.0 V 0.01 OUTPUT Output voltage range TPS62080, TPS62080A Output voltage accuracy TPS62081 IOUT = 0 mA; VIN ≥ 2.3V –2.5 2.5 % Output voltage accuracy TPS62082 IOUT = 0 mA; VIN ≥ 3.6V –2.5 2.5 % Snooze Mode output voltage accuracy MODE = HIGH; VIN ≥ 2.3V and VIN ≥ VOUT + 1V –5 5 % VFB Feedback regulation voltage TPS62080, TPS62080A VIN ≥ 2.3V and VIN ≥ VOUT + 1V 0.45 0.462 V IFB Feedback input bias current TPS62080, TPS62080A VFB = 0.45 V 10 100 nA RDIS Output discharge resistor VOUT 0.438 EN = LOW, VOUT = 1.8 V 1 TPS62080A , EN = LOW, VOUT = 1.2 V, 25 Line Regulation RDS(on) ILIM Load Regulation TPS62081, TPS62082 High side FET on-resistance ISW = 500 mA Low side FET on-resistance ISW = 500 mA High side FET switch current limit Rising inductor current Copyright © 2011–2013, Texas Instruments Incorporated 40 kΩ 65 %/V -0.25 %/A 120 mΩ 90 1.6 2.8 mΩ 4 Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 Ω 0 A 3 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com DEVICE INFORMATION 2 MODE 3 FB 4 MA GND ER 1 TH EN LP AD QFN 8 PIN 2X2 mm 8 VIN 7 SW 6 PG 5 VOS PIN FUNCTIONS PIN NAME NO. I/O DESCRIPTION VIN 8 PWR EN 1 IN Device Enable Logic Input. Logic HIGH enables the device, logic LOW disables the device and turns it into shutdown. MODE 3 IN Snooze Mode Enable Logic Input. Logic HIGH enables the Snooze Mode, logic LOW disables the Snooze Mode GND 2 PWR VOS 5 IN SW 7 PWR FB 4 IN PG 6 OUT Thermal Pad 4 Power Supply Voltage Input. Power and Signal Ground. Output Voltage Sense Pin for the internal control loop. Must be connected to output. Switch Pin connected to the internal MOSFET switches and inductor terminal. Connect the inductor of the output filter here. Feedback Pin for the internal control loop. Connect this pin to the external feedback divider for the adjustable output version. For the fixed output voltage versions this pin must be left floating or connected to GND. Power Good open drain output. This pin is pulled to low if the output voltage is below regulation limits. Can be left floating if not used. Connect it to GND. Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 FUNCTIONAL BLOCK DIAGRAMS MODE PG Control Logic Thermal Shutdown VIN High Side N-MOS Power Good Gate Driver Low Side N-MOS SW Active Output Discharge Snooze Mode GND EN ramp Softstart comparator direct control & compensation Under Voltage Shutdown VOS FB error amplifier minimum on-timer DSC-CONTROL REF TM Figure 2. Functional Block Diagram (Adjustable Output Voltage Version) MODE PG Control Logic Thermal Shutdown VIN High Side N-MOS Power Good Gate Driver Low Side N-MOS SW Active Output Discharge Snooze Mode GND EN ramp Softstart comparator Under Voltage Shutdown VOS error amplifier minimum on-timer DSC-CONTROL direct control & compensation TM FB REF Figure 3. Functional Block Diagram (Fixed Output Voltage Version) Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 5 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com PARAMETER MEASUREMENT INFORMATION TPS6208x VIN POWER GOOD VIN PG EN SW R3 L1 C3 C1 MODE VOUT C2 VOS R1 GND FB R2 Table 2. List of Components REFERENCE 6 DESCRIPTION MANUFACTURER C1 10uF, Ceramic Capacitor, 6.3V, X5R, size 0603 Std C2 22uF, Ceramic Capacitor, 6.3V, X5R, size 0805, GRM21BR60J226ME39L Murata C3 47uF, Tantalum Capacitor, 8V, 35mΩ, size 3528, T520B476M008ATE035 Kemet L1 1.0µH, Power Inductor, 2.2A, size 3x3x1.2mm, XFL3012-102MEB R1 Depending on the output voltage of TPS62080, 1%; Not be populated for TPS62081, TPS62082; R2 39.2k, Chip Resistor, 1/16W, 1%, size 0603 Std R3 178k, Chip Resistor, 1/16W, 1%, size 0603 Std Submit Documentation Feedback Coilcraft Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 TYPICAL CHARACTERISTICS Table 3. TABLE OF GRAPHS Figure TPS62080, Load Current, VOUT = 0.9V Figure 4 TPS62080, Load Current, VOUT = 1.2V Figure 5 TPS62080, Load Current, VOUT = 2.5V Figure 6 TPS62081, Load Current, VOUT = 1.8V Figure 7 TPS62082, Load Current, VOUT = 3.3V Figure 8 TPS62080, Input Voltage, VOUT = 0.9V Figure 9 TPS62080, Input Voltage, VOUT = 2.5V Figure 10 TPS62081, Input Voltage, VOUT = 1.8V Figure 11 TPS62082, Input Voltage, VOUT = 3.3V Figure 12 TPS62080, Load Current, VOUT = 0.9V Figure 13 TPS62080, Load Current, VOUT = 2.5V Figure 14 TPS62081, Load Current, VOUT = 1.8V Figure 15 TPS62082, Load Current, VOUT = 3.3V Figure 16 Input Voltage, Normal Mode Figure 17 Input Voltage, Snooze Mode Figure 18 Input Voltage, High Side FET Figure 19 Input Voltage, Low Side FET Figure 20 TPS62080, Load Current, VOUT = 0.9V, Figure 21 TPS62080, Load Current, VOUT = 2.5V, Figure 22 TPS62080, VIN = 3.3V, VOUT = 1.2V, Load Current = 500mA, PWM Mode Figure 23 TPS62080, VIN = 3.3V, VOUT = 1.2V, Load Current = 10mA, PFM Mode Figure 24 TPS62080, VIN = 3.3V, VOUT = 1.2V, Load Current = 2mA, Snooze Mode Figure 25 Load Transient TPS62080, VIN = 3.3V, VOUT = 1.2V, Load Current = 50mA to 1A Figure 26 Line Transient TPS62080, VIN = 3.3V to 4.2V, VOUT = 1.2V, Load = 2.2Ω Figure 27 TPS62080, VIN = 3.3V, VOUT = 1.2V, Load = 2.2Ω Figure 28 TPS62080, VIN = 3.3V, VOUT = 1.2V, No Load Figure 29 TPS62080, VIN = 3.3V, VOUT = 1.2V, No Load Figure 30 Efficiency Output Voltage Accuracy Quiescent Current RDS(on) Switching Frequency Typical Operation Startup Shutdown with Output Discharge EFFICIENCY vs LOAD CURRENT EFFICIENCY vs LOAD CURRENT 100 100 TPS62080 VOUT = 0.9 V 90 80 80 70 70 Efficiency (%) Efficiency (%) 90 60 50 VIN = 2.8 V VIN = 3.6 V VIN = 4.2 V VIN = 2.8 V, Snooze Mode VIN = 3.6 V, Snooze Mode VIN = 4.2 V, Snooze Mode 40 30 20 10 0 10u 100u 1m 10m 100m Output Current (A) Figure 4. Copyright © 2011–2013, Texas Instruments Incorporated 1 TPS62080 VOUT = 1.2 V 60 50 VIN = 2.8 V VIN = 3.6 V VIN = 4.2 V VIN = 2.8 V, Snooze Mode VIN = 3.6 V, Snooze Mode VIN = 4.2 V, Snooze Mode 40 30 20 10 3 G001 0 10u 100u 1m 10m 100m Output Current (A) 1 3 G002 Figure 5. Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 7 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com EFFICIENCY vs LOAD CURRENT EFFICIENCY vs LOAD CURRENT 100 100 TPS62080 VOUT = 2.5 V 90 80 80 70 70 Efficiency (%) Efficiency (%) 90 60 50 VIN = 3.6 V VIN = 4.2 V VIN = 5.0 V VIN = 3.6 V, Snooze Mode VIN = 4.2 V, Snooze Mode VIN = 5.0 V, Snooze Mode 40 30 20 10 0 10u 100u 1m 10m 100m Output Current (A) 1 TPS62081 VOUT = 1.8 V 60 50 VIN = 2.8 V VIN = 3.6 V VIN = 4.2 V VIN = 2.8 V, Snooze Mode VIN = 3.6 V, Snooze Mode VIN = 4.2 V, Snooze Mode 40 30 20 10 0 10u 3 100u 1m 10m 100m Output Current (A) G003 Figure 6. Figure 7. EFFICIENCY vs LOAD CURRENT OUTPUT VOLTAGE vs INPUT VOLTAGE 100 1 3 G005 0.910 90 0.905 Output Voltage (V) Efficiency (%) 80 70 TPS62082 VOUT = 3.3 V 60 50 VIN = 3.6 V VIN = 4.2 V VIN = 5.0 V VIN = 3.6 V, Snooze Mode VIN = 4.2 V, Snooze Mode VIN = 5.0 V, Snooze Mode 40 30 20 10 0 10u 100u 1m 10m 100m Output Current (A) 1 2.8 3.3 G004 3.8 4.3 4.8 Input Voltage (V) Figure 9. OUTPUT VOLTAGE vs INPUT VOLTAGE OUTPUT VOLTAGE vs INPUT VOLTAGE 5.3 5.8 G006 1.86 TPS62080 VOUT = 2.5 V 1.84 Output Voltage (V) Output Voltage (V) TPS62080 VOUT = 0.9 V Figure 8. 2.50 IOUT = 1A, TA = 25°C IOUT = 1A, TA = −40°C IOUT = 1A, TA = 85°C IOUT = 10mA, TA = 25°C IOUT = 10mA, TA = −40°C IOUT = 10mA, TA = 85°C 2.48 2.46 3 3.5 4 4.5 Input Voltage (V) Figure 10. 8 IOUT = 1A, TA = 25°C IOUT = 1A, TA = −40°C IOUT = 1A, TA = 85°C IOUT = 10mA, TA = 25°C IOUT = 10mA, TA = −40°C IOUT = 10mA, TA = 85°C 0.890 0.880 2.3 3 2.52 2.44 2.5 0.895 0.885 2.56 2.54 0.900 Submit Documentation Feedback 5 5.5 TPS62081 VOUT = 1.8 V 1.82 1.80 1.78 IOUT = 1A, TA = 25°C IOUT = 1A, TA = −40°C IOUT = 1A, TA = 85°C IOUT = 10mA, TA = 25°C IOUT = 10mA, TA = −40°C IOUT = 10mA, TA = 85°C 1.76 1.74 1.72 6 G007 1.70 2.3 2.8 3.3 3.8 4.3 4.8 Input Voltage (V) 5.3 5.8 G008 Figure 11. Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 OUTPUT VOLTAGE vs INPUT VOLTAGE OUTPUT VOLTAGE vs LOAD CURRENT 3.36 3.34 0.910 TPS62082 VOUT = 3.3 V 0.908 0.906 Output Voltage (V) Output Voltage (V) 3.32 3.30 3.28 3.26 IOUT = 1A, TA = 25°C IOUT = 1A, TA = −40°C IOUT = 1A, TA = 85°C IOUT = 10mA, TA = 25°C IOUT = 10mA, TA = −40°C IOUT = 10mA, TA = 85°C 3.24 3.22 3.20 3.18 3.3 3.8 4.3 4.8 Input Voltage (V) 5.3 0.904 0.902 0.900 0.898 0.896 0.892 0.890 10u 5.8 Figure 13. OUTPUT VOLTAGE vs LOAD CURRENT OUTPUT VOLTAGE vs LOAD CURRENT 1 3 G010 1.84 TPS62081 VIN = 3.6 V 2.52 Output Voltage (V) Output Voltage (V) 1m 10m 100m Output Current (A) Figure 12. 2.50 2.48 TA = 25°C TA = −40°C TA = 85°C 100u 1m 10m 100m Output Current (A) 1 1.82 1.80 1.78 1.76 10u 3 TA = 25°C TA = −40°C TA = 85°C 100u 1m 10m 100m Output Current (A) G011 Figure 14. Figure 15. OUTPUT VOLTAGE vs LOAD CURRENT QUIESCENT CURRENT vs INPUT VOLTAGE 3.34 1 3 G012 40u IOUT = 0 A, Mode = Low TPS62082 VIN = 3.6 V Quiescent Current (A) 3.32 Output Voltage (V) 100u G009 TPS62080 VIN = 3.6 V 3.30 3.28 TA = 25°C TA = −40°C TA = 85°C 3.26 3.24 10u TA = 25°C TA = −40°C TA = 85°C 0.894 2.54 2.46 10u TPS62080 VIN = 3.6 V 100u 1m 10m 100m Output Current (A) Figure 16. Copyright © 2011–2013, Texas Instruments Incorporated 1 35u 30u 25u TA = 25°C TA = −40°C TA = 85°C 20u 3 G013 15u 2.3 2.8 3.3 3.8 4.3 4.8 Input Voltage (V) 5.3 5.8 G016 Figure 17. Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 9 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com QUIESCENT CURRENT vs INPUT VOLTAGE HIGH SIDE FET RDS(on) vs INPUT VOLTAGE 9.5u 250 FET On−Resistance (mΩ) Quiescent Current (A) IOUT = 0 A, Snooze Mode 8u 6.5u 5u TA = 25°C TA = −40°C TA = 85°C 3.5u 2u 2.3 2.8 3.3 3.8 4.3 4.8 Input Voltage (V) 5.3 210 170 130 90 50 2.3 5.8 2.8 3.3 G017 3.8 4.3 4.8 Input Voltage (V) 5.3 5.8 G018 Figure 18. Figure 19. LOW SIDE FET RDS(on) vs INPUT VOLTAGE SWITCHING FREQUENCY vs LOAD CURRENT 220 3M TA = 25°C TA = −40°C TA = 85°C 180 Switching Frequency (Hz) FET On−Resistance (mΩ) TA = 25°C TA = −40°C TA = 85°C 140 100 60 20 2.3 2.8 3.3 3.8 4.3 4.8 Input Voltage (V) 5.3 TPS62080 VOUT = 0.9V 2.5M 2M 1.5M 1M VIN = 2.3V VIN = 3.3V VIN = 4.2V VIN = 5.0V 500k 0 5.8 G019 Figure 20. 0 400m 800m Output Current (A) 1.2 1.6 G014 Figure 21. SWITCHING FREQUENCY vs LOAD CURRENT TYPICAL APPLICATION (PWM MODE) 4.5M TPS62080 VOUT = 2.5V 4M Switching Frequency (Hz) VIN = 2.5V VIN = 3.3V VIN = 4.2V VIN = 5.0V 3.5M 3M SW 2V/div 2.5M 2M 1.5M VOUT 20mV/div 1M 500k 0 0 400m 800m Output Current (A) 1.2 1.6 G015 L COIL 0.5A/div t - 200ns/div Figure 22. 10 Submit Documentation Feedback Figure 23. Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 TYPICAL APPLICATION (PFM MODE) TYPICAL APPLICATION (SNOOZE MODE) SW 2V/div SW 2V/div VOUT 20mV/div VOUT 50mV/div L COIL 0.2A/div L COIL 0.2A/div t - 2µs/div t - 50µs/div Figure 24. Figure 25. LOAD TRANSIENT LINE TRANSIENT 1A LOAD 1A/div 4.2V VIN 1V/div 50mA 3.3V VOUT 20mV/div VOUT 50mV/div L COIL 1A/div t - 50µs/div Figure 26. Copyright © 2011–2013, Texas Instruments Incorporated t - 100µs/div Figure 27. Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 11 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com START UP START UP (WITHOUT LOAD) EN 5V/div EN 5V/div PG 1V/div PG 1V/div VOUT 1V/div VOUT 1V/div L COIL 0.5A/div L COIL 0.2A/div t - 20µs/div t - 20µs/div Figure 28. Figure 29. SHUT DOWN EN 5V/div VOUT 0.5V/div t - 20ms/div Figure 30. 12 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 DETAILED DESCRIPTION DEVICE OPERATION The TPS6208x synchronous switched mode converters are based on DCS™ Control (Direct Control with Seamless transition into Power Save Mode). This is an advanced regulation topology that combines the advantages of hysteretic and voltage mode control. The DCS™ Control topology operates in PWM (Pulse Width Modulation) mode for medium to heavy load conditions and in Power Save Mode at light load currents. In PWM the converter operates with its nominal switching frequency of 2MHz having a controlled frequency variation over the input voltage range. As the load current decreases the converter enters Power Save Mode, reducing the switching frequency and minimizing the IC quiescent current to achieve high efficiency over the entire load current range. DCS™ Control supports both operation modes (PWM and PFM) using a single building block having a seamless transition from PWM to Power Save Mode without effects on the output voltage. Fixed output voltage versions provide smallest solution size combined with lowest quiescent current. The TPS6208x offers both excellent DC voltage and superior load transient regulation, combined with very low output voltage ripple, minimizing interference with RF circuits. The device is equipped with the Snooze Mode functionality, which is enabled with the Mode pin. The Snooze Mode supports high efficiency conversion at lowest output currents below 2mA. If no load current is drawn, the ultra low quiescent current of 6.5uA is sufficient to maintain the output voltage. This extends battery run time by reducing the quiescent current during lowest or no load conditions in battery driven applications. For mainsoperated voltage supplies, the Snooze Mode reduces the system's stand-by energy consumption. During shutdown (EN = LOW), the device reduces energy consumption to less than 1uA. POWER SAVE MODE As the load current decreases the TPS6208x will enter the Power Save Mode operation. During Power Save Mode the converter operates with reduced switching frequency in PFM mode and with a minimum quiescent current maintaining high efficiency. The power save mode occurs when the inductor current becomes discontinuous. It is based on a fixed on time architecture. The typical on time is given by ton=400ns·(VOUT / VIN). The switching frequency over the whole load current range is shown in Figure 21 and Figure 22. SNOOZE MODE The TPS6208x offers a Snooze Mode function. If the Snooze Mode is enabled by an external logic signal setting the MODE pin to HIGH, the device's quiescent current consumption is reduced to typically 6.5µA. As a result, the high efficiency range is extended towards the range of lowest output currents below 2mA, see the typical characteristics efficiency figures. If the device is operating in Snooze Mode, a dedicated, low power consuming block monitors the output voltage. All other control blocks are snoozing during that time. If the output voltage falls below the programmed output voltage by 3.5% (typ), the control blocks wake up, regulates the output voltage and allow themselves to snooze again until the output voltage drops again. The Snooze Mode operation provides a clear efficiency improvement at lowest output currents. If the load current increases, the advantage of efficiency in Snooze mode will be deprived. Since the dynamic load regulation operates best if the Snooze Mode is disabled, it is recommended to turn off the Snooze Mode by external logic signal if the load current exceeds 2mA, like a micro controller to operate the MODE pin. 100% DUTY CYCLE LOW DROPOUT OPERATION The device offers low input to output voltage difference by entering 100% duty cycle mode. In this mode the high side MOSFET switch is constantly turned on and the low side MOSFET is switched off. This is particularly useful in battery powered applications to achieve longest operation time by taking full advantage of the whole battery voltage range. The minimum input voltage to maintain switching regulation, depending on the load current and output voltage can be calculated as: VIN,MIN = VOUT + IOUT,MAX ´ (RDS(on) + RL ) (1) With: VIN,MIN = Minimum input voltage IOUT,MAX = Maximum output current Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 13 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com RDS(on) = High side FET on-resistance RL = Inductor ohmic resistance ENABLING / DISABLING THE DEVICE The device is enabled by setting the EN input to a logic HIGH. Accordingly, a logic LOW disables the device. If the device is enabled, the internal power stage will start switching and regulate the output voltage to the programmed threshold. The EN input must be terminated with a resistance less than 1MΩ pulled to VIN or GND. OUTPUT DISCHARGE The output gets discharged by the SW pin with a typical discharge resistor of RDIS whenever the device shuts down. This is the case when the device gets disabled by enable, thermal shutdown trigger, and undervoltage lockout trigger. SOFT START After enabling the device, an internal soft-start circuitry monotonically ramps up the output voltage and reaches the nominal output voltage during a soft start time (100µs, typical). This avoids excessive inrush current and creates a smooth output voltage rise slope. It also prevents excessive voltage drops of primary cells and rechargeable batteries with high internal impedance. If the output voltage is not reached within the soft start time, such as in the case of heavy load, the converter will enter regular operation. Consequently, the inductor current limit will operate as described below. The TPS6208x is able to start into a pre-biased output capacitor. The converter starts with the applied bias voltage and ramps the output voltage to its nominal value. POWER GOOD The TPS6208x has a power good output going low when the output voltage is below its nominal value. The power good keeps high impedance once the output is above 95% of the regulated voltage, and is driven to low once the output voltage falls below typically 90% of the regulated voltage. The PG pin is a open drain output and is specified to sink typically up to 0.5mA. The power good output requires a pull up resistor that is recommended connecting to the device output. When the device is off due to disable, UVLO or thermal shutdown, the PG pin is at high impedance. The PG signal can be used for sequencing of multiple rails by connecting to the EN pin of other converters. Leave the PG pin unconnected when not used. UNDER VOLTAGE LOCKOUT To avoid mis-operation of the device at low input voltages, an under voltage lockout is implemented, that shuts down the device at voltages lower than VUVLO with a VHYS_UVLO hysteresis. THERMAL SHUTDOWN The device goes into thermal shutdown once the junction temperature exceeds typically TJSD. Once the device temperature falls below the threshold the device returns to normal operation automatically. INDUCTOR CURRENT LIMIT The Inductor Current Limit prevents the device from high inductor current and drawing excessive current from the battery or input voltage rail. Excessive current might occur with a shorted/saturated inductor or a heavy load/shorted output circuit condition. The incorporated inductor peak current limit measures the current during the high side and low side power MOSFET on-phase in PWM mode. Once the high side switch current limit is tripped, the high side MOSFET is turned off and the low side MOSFET is turned on to reduce the inductor current. Until the inductor current drops down to low side switch current limit, the low side MOSFET is turned off and the high side switch is turned on again. This operation repeats until the inductor current does not reach the high side switch current limit. Due to the internal propagation delay, the real current limit value can exceed the static current limit in the electrical characteristics table. 14 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 APPLICATION INFORMATION Output Filter Design The inductor and the output capacitor together provide a low pass frequency filter. To simplify this process Table 4 outlines possible inductor and capacitor value combinations for the most application. Table 4. Matrix of Output Capacitor / Inductor Combinations COUT [µF] (1) L [µH] (1) 10 22 47 100 1 + + (2) (3) + + 2.2 + + + + 150 0.47 4.7 (1) (2) (3) Capacitance tolerance and bias voltage de-rating is anticipated. The effective capacitance can vary by+20% and -50%. Inductor tolerance and current de-rating is anticipated. The effective inductance can vary by +20% and -30%. Plus mark indicates recommended filter combinations. Filter combination in typical application. Inductor Selection Main parameter for the inductor selection is the inductor value and then the saturation current of the inductor. To calculate the maximum inductor current under static load conditions, Equation 4 is given. DI IL,MAX = IOUT,MAX + L 2 VOUT VIN DIL = VOUT ´ L ´ fSW 1- (2) Where IOUT,MAX = Maximum output current ΔIL = Inductor current ripple fSW = Switching frequency L = Inductor value It's recommended to choose the saturation current for the inductor 20%~30% higher than the IL,MAX, out of Equation 4. A higher inductor value is also useful to lower ripple current, but will increase the transient response time as well. The following inductors are recommended to be used in designs. Table 5. List of Recommended Inductors INDUCTANCE [µH] CURRENT RATING [mA] DIMENSIONS L x W x H [mm3] DC RESISTANCE [mΩ typ] 1.0 2500 3 x 3 x 1.2 1.0 1650 3 x 3 x 1.2 2.2 2500 2.2 1600 TYPE MANUFACTURER 35 XFL3012-102ME Coilcraft 40 LQH3NPN1R0NJ0 Murata 4 x 3.7 x 1.65 49 LQH44PN2R2MP0 Murata 3 x 3 x 1.2 81 XFL3012-222ME Coilcraft Capacitor Selection The input capacitor is the low impedance energy source for the converter which helps to provide stable operation. A low ESR multilayer ceramic capacitor is recommended for best filtering and should be placed between VIN and PGND as close as possible to that pins. For most applications 10μF will be sufficient, a larger value reduces input current ripple. Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 15 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com The architecture of the TPS6208X allows to use tiny ceramic-type output capacitors with low equivalent series resistance (ESR). These capacitors provide low output voltage ripple and are recommended. To keep its resistance up to high frequencies and to get narrow capacitance variation with temperature, it's recommended to use X7R or X5R dielectric. The TPS6208x is designed to operate with an output capacitance of 10µF to 100µF, as outlined in Table 4. Table 6. List of Recommended Capacitors CAPACITANCE [µF] TYPE DIMENSIONS L x W x H [mm3] MANUFACTURER 10 GRM188R60J106M 0603: 1.6 x 0.8 x 0.8 Murata 22 GRM188R60G226M 0603: 1.6 x 0.8 x 0.8 Murata 22 GRM21BR60J226M 0805: 2.0 x 1.2 x 1.25 Murata Setting the Output Voltage The TPS608x devices are available as fixed and adjustable output voltage versions. The fixed versions are internally programmed to a fixed output voltage, whereas the adjustable output voltage version needs to be programmed via an external voltage divider to set the desired output voltage. Adjustable output voltage version For the adjustable output voltage version, an external resistor divider is used. By selecting R1 and R2, the output voltage is programmed to the desired value. TPS62080 VIN POWER GOOD 2.3V .. 6V 180k VIN PG EN SW VOUT VOS 22µF 1mH 10µF MODE R1 GND FB R2 Figure 31. Typical Application Circuit for Adjustable Output Voltage Option When the output voltage is regulated, the typical voltage at the FB pin is VFB for the adjustable devices. The following equation can be used to calculate R1 and R2. R1 ö R1 ö æ æ VOUT = VFB ´ ç1 + ÷ = 0.45 V ´ ç1 + ÷ R 2 R 2ø è ø è (3) For best accuracy, R2 should be kept smaller than 40kΩ to ensure that the current flowing through R2 is at least 100 times larger than IFB. Changing the sum towards a lower value increases the robustness against noise injection. Changing the sum towards higher values reduces the quiescent current and supports the Snooze Mode function for achieving highest efficiency at low load currents. For lowest quiescent current during the Snooze Mode, it is recommended to use a fixed output voltage version like TPS62081 and TPS62082. PCB Layout The PCB layout is an important step to maintain the high performance of the TPS6208x devices. The input/output capacitors and the inductor should be placed as close as possible to the IC. This keeps the traces short. Routing these traces direct and wide results in low trace resistance and low parasitic inductance. A common power GND should be used. The low side of the input and output capacitors must be connected properly to the power GND to avoid a GND potential shift. The sense traces connected to FB and VOS pins are signal traces. Special care should be taken to avoid noise being induced. By a direct routing, parasitic inductance can be kept small. GND layers might be used for shielding. Keep these traces away from SW nodes. 16 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 L V IN CIN V OUT 1 COUT GND R1 R2 Figure 32. PCB Layout Suggestion THERMAL INFORMATION Implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires special attention to power dissipation. Many system-dependent issues such as thermal coupling, airflow, added heat sinks and convection surfaces, and the presence of other heat-generating components affect the powerdissipation limits of a given component. Three basic approaches for enhancing thermal performance are listed below: • Improving the power dissipation capability of the PCB design • Improving the thermal coupling of the component to the PCB by soldering the ThermalPAD™ • Introducing airflow in the system For more details on how to use the thermal parameters, see the application notes: Thermal Characteristics Application Notes SZZA017 and SPRA953. APPLICATION EXAMPLES TPS62082 VIN 3.6V .. 6V POWER GOOD VIN PG EN SW 180k 1µH 10µF MODE GND VOS 3.3V VOUT 22µF FB Figure 33. 3.3V Fixed Output Voltage Application (TPS62082) Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 17 TPS62080, TPS62080A TPS62081, TPS62082 SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 www.ti.com TPS62080 VIN POWER GOOD 2.3V .. 6V VIN PG EN SW 180k 1mH 10µF MODE 1.2V VOUT 22µF VOS 65.3k GND FB 39.2k Figure 34. 1.2V Output Voltage Application (TPS62080) TPS62080 VIN POWER GOOD 3.0V .. 6V VIN 180k PG 1mH 10µF EN MODE 2.5V SW VOUT 22µF VOS 178.6k GND FB 39.2k Figure 35. 2.5V Output Voltage Application (TPS62080) 18 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 TPS62080, TPS62080A TPS62081, TPS62082 www.ti.com SLVSAE8D – SEPTEMBER 2011 – REVISED JULY 2013 REVISION HISTORY Changes from Original (September 2011) to Revision A Page • Added TPS62080A device .................................................................................................................................................... 1 • Added TPS62080ADSG (Product Preview) and TPS62080ADGN (Product Preview) to ORDERING INFORMATION ...... 2 • Added TPS62080A output discharge resistor ....................................................................................................................... 3 Changes from Revision A (February 2012) to Revision B • Page Changed TPS62080ADSG from Product Preview to Production Data in ORDERING INFORMATION .............................. 2 Changes from Revision B (March 2012) to Revision C • Page Changed the Thermal Information tables values .................................................................................................................. 2 Changes from Revision C (May 2013) to Revision D Page • Deleted TPS62080ADGN from ORDERING INFORMATION table ..................................................................................... 2 • Deleted TPS62080A column from the Thermal Information table ........................................................................................ 2 Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TPS62080 TPS62080A TPS62081 TPS62082 19 PACKAGE OPTION ADDENDUM www.ti.com 10-Jul-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) TPS62080ADSGR ACTIVE WSON DSG 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 SBN TPS62080ADSGT ACTIVE WSON DSG 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 SBN TPS62080DSGR ACTIVE WSON DSG 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVR TPS62080DSGT ACTIVE WSON DSG 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVR TPS62081DSGR ACTIVE WSON DSG 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVS TPS62081DSGT ACTIVE WSON DSG 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVS TPS62082DSGR ACTIVE WSON DSG 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVT TPS62082DSGT ACTIVE WSON DSG 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVT (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com (4) 10-Jul-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. 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Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 24-Jun-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing TPS62080ADSGR WSON DSG 8 TPS62080ADSGT WSON DSG TPS62080DSGR WSON DSG TPS62080DSGT WSON TPS62081DSGR SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 DSG 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 WSON DSG 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 TPS62081DSGT WSON DSG 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 TPS62082DSGR WSON DSG 8 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 TPS62082DSGT WSON DSG 8 250 179.0 8.4 2.2 2.2 1.2 4.0 8.0 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 24-Jun-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS62080ADSGR WSON DSG 8 3000 195.0 200.0 45.0 TPS62080ADSGT WSON DSG 8 250 195.0 200.0 45.0 TPS62080DSGR WSON DSG 8 3000 195.0 200.0 45.0 TPS62080DSGT WSON DSG 8 250 195.0 200.0 45.0 TPS62081DSGR WSON DSG 8 3000 195.0 200.0 45.0 TPS62081DSGT WSON DSG 8 250 195.0 200.0 45.0 TPS62082DSGR WSON DSG 8 3000 195.0 200.0 45.0 TPS62082DSGT WSON DSG 8 250 195.0 200.0 45.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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