PT6980 Series 10-A 12V-Input Dual Output Integrated Switching Regulator SLTS154 Revised (10/2/2001) Features • Dual Outputs • Soft-Start • Internal Sequencing • Short Circuit Protection • 23-pin Space-Saving Package • Solderable Copper Case (See Ordering Information) • • • • • Ideal Power Source for DSPs 12V Input Outputs Adjustable Remote Sensing (Vo1 & Vo2) Standby Function Pin-Out Information Description Ordering Information The PT6980 Excalibur™ series of power modules are dual output integrated switching regulators (ISRs) specifically designed to power mixed signal ICs. Operating from a 12-V input bus, the dual output provides power for both the digital I/O logic and a DSP core from a single module. Both output voltages are internally sequenced during power-up and powerdown to comply with the requirements of the latest DSP chips. Each output is independently adjustable or can be set to at least one alternative bus voltage with a simple pin-strap. The modules are made available in a space-saving solderable case. The features include output current limit and short-circuit protection. PT6981o = +2.5/1.8 Volts PT6982o = +3.3/2.5 Volts PT6983o = +3.3/1.8 Volts PT6984o = +3.3/1.2 Volts PT6985o = +2.5/1.2 Volts Pin Function Pin Function 1 Vo1 Sense 13 Vo1 2 No Connect 14 Vo1 3 STBY 15 Vo1 4 Vin 16 Vo1 Adjust * 5 Vin 17 No Connect 6 Vin 18 Vo2 PT Series Suffix (PT1234x) 7 GND 19 Vo2 Case/Pin Configuration Order Suffix Package Code 8 GND 20 Vo2 9 GND 21 Vo2 N A C (ELF) (ELG) (ELH) 10 GND 22 Vo2 Sense 11 GND 23 Vo2 Adjust * 12 Vo1 Vertical Horizontal SMD (Reference the applicable package code drawing for the dimensions and PC layout) * Vo1 and Vo2 can be pin-strapped to another voltage. See application note on output voltage adjustment. Standard Application V o 2 Sense STBY V o 1 Sense 3 22 1 18-21 V IN 4,5,6 Vo 2 PT6980 12-15 Vo 1 + 7-11 C1 16 23 + C3 C2 GND GND C1 = Req’d 560µF electrolytic C2 = Req’d 330µF electrolytic C3 = Optional 100µF electrolytic For technical support and more information, see inside back cover or visit www.ti.com PT6980 Series 10-A 12V-Input Dual Output Integrated Switching Regulator General Specifications (Unless otherwise stated, Ta =25°C, Vin =12V) Characteristic Symbol Short Circuit Current Switching Frequency Standby (Pin 3) Input High Voltage Input Low Voltage Input Low Current Standby Input Current External Output Capacitance Isc ƒo Maximum Operating Temperature Range Storage Temperature Mechanical Shock VIH V IL IIL Iin standby C2 C3 Ta Ts Mechanical Vibration Weight Flammability — — Conditions Min Io1 + Io2 combined Over Vin range Referenced to GND (pin 7) pin 3 to GND Over Vin Range — Per Mil-STD-883D, Method 2002.3 1 msec, ½ Sine, mounted Per Mil-STD-883D, Method 2007.2 20-2000 Hz, Soldered in a PC board Vertical/Horizontal Meets UL 94V-O PT6980 Series Typ Max Units — 500 19 550 — 600 A kHz — –0.1 — — 330 (2) 0 –40 (3) — — -0.5 4 — — — Open (1) +0.4 – 6 15,000 (2) 330 +85 (4) –40 — +125 °C — 500 — G ’s — — 15 26 — — G ’s grams V mA mA µF °C Notes: (1) The Standby (pin 3) has an internal pull-up to Vin, and if it is left open circuit the module will operate when input power is applied.Refer to the application notes for interface considerations. (2) The total combined ESR of all output capacitance at 100kHz must be (less than) <50 mΩ. (3) For operating temperatures below 0°C, Cin and Cout must have stable characteristics. Use either tantalum or Oscon® capacitors. (4) See Safe Operating Area curves for the specific output voltage combination, or contact the factory for the appropriate derating. Input/Output Capacitors: The PT6980 series requires a 330µF electrolytic capacitor at both the input and output for proper operation (300µF for Oscon® or low ESR tantalum). In addition, the input capacitance must be rated for a minimum of 1.0Arms ripple current. For transient or dynamic load applications, additional capacitance may be required. Refer to the application notes for more information. Power-up Sequencing and Vo1/Vo2 Loading Power-up Sequencing The PT6980 series of regulators provide two output voltages, Vo1 and Vo 2. Each of the output voltage combinations offered by the PT6980 series provides power for both a lowvoltage processor core, and the associated digital support circuitry. In addition, each output is internally sequenced during power-up and power-down to comply with the requirements of most DSP and µP IC’s, and their accompanying chipsets. Figure 1 shows the typical waveforms of the output voltages, Vo1 and Vo2, from the instance that either input power is applied or the module is enabled via the Standby pin. Following a delay of about 25 milli-secs, the voltages at Vo1 and Vo2 rise together until Vo2 reaches its set-point. Then Vo1 continues to rise until both output voltages have reached full voltage. Figure 1; PT6980 Series Power-up V1 (1V/Div) V2 (1V/Div) Vstby (10V/Div) Vo1/Vo2 Loading The output voltages from the PT6980 series regulators are independently regulated. The voltage at Vo1 is produced by a highly efficient switching regulator. The lower output voltage, Vo2, is derived from Vo1. The regulation method used for Vo 2 also provides control of this output voltage during power-down. Vo2 will sink current if the voltage at Vo1 attempts to fall below it. The load specifications for each model of the PT6980 series gives both a ‘Typical’ (Typ) and ‘Maximum’ (Max) load current for each output. For operation within the product’s rating, the load currents at Vo1 and Vo2 must comply with the following limits:• Io 2 must be less than Io2(max). • The sum-total current from both outputs (Io1 + Io2) must not exceed Io1(max). In the case that either Vo1 or Vo2 are adjusted to some other value than the default output voltage, the absolute maximum load current for Io2 must be revised to comply with the following equation. Io2 (max) = 2.5 Vo1 – Vo2 Adc Consult the specification table for each model of the series for the actual numeric values. HORIZ SCALE: 5ms/Div For technical support and more information, see inside back cover or visit www.ti.com PT6981 10.5-A 12V-Input Dual Output Integrated Switching Regulator PT6981 Performance Specifications (Unless otherwise stated, T a =25°C, Vin =12V, C1 =560µF, C 2 =330µF, Io1 =Io1typ, and Io2 =Io 2typ) Characteristic Symbol Conditions Output Current Ta =25°C, natural convection Input Voltage Range Set Point Voltage Tolerance Io1 Io2 Io1 Io2 Vin Vo tol Temperature Variation Regtemp –40° >Ta > +85°C Line Regulation Regline Over Vin range Load Regulation Regload Over Io range Total Output Voltage Variation ∆Votot Includes set-point, line, load –40° >Ta > +85°C Efficiency Vo Ripple (pk-pk) η Vr Transient Response ttr Vo1 (2.5V) Vo2 (1.8V) Vo1 (2.5V) Vo2 (1.8V) Ta =60°C, 200LFM airflow 0.1 0 0.1 0 10.8 — — — — — — — — — — — — — — — — Over Io Range Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 20MHz bandwidth Vo1 Vo2 1A/µs load step, 50% to 100% Iotyp Vo over/undershoot ∆Vtr PT6981 (2.5V/1.8V) Typ Max Min Vo1 Vo2 8 (ii) 2.5 (ii) 8 (ii) 2.5 (ii) — ±12 ±9 ±0.5 ±0.5 ±10 ±5 ±10 ±5 ±44 ±28 80 35 35 60 ±50 ±20 (i) (i) Units 10.5 (iii) 2.5 (iii) 10.5 (iii) 2.5 (iii) 13.2 ±38 ±27 — — ±15 ±7 ±15 ±7 — — — — — — — — A A VDC mV %Vo mV mV mV % mVpp µs mV Notes: (i) Io1(min) current of 0.1A can be divided between both outputs, Vo1 or Vo2. The module will operate at no load with reduced specifications. (ii) The typical current is that which can be drawn simultaneously from both outputs under the stated operating conditions. (iii) The sum of Io1 and Io2 must be less than Io1max, and Io 2 must be less than Io2max. PT6981 Typical Characteristics Efficiency vs Io1 (See Note A) Power Dissipation vs Io 1 (See Note A) 7 90 85 6 Io2 (A) Io2 (A) 0.5 1 1.5 2 2.5 75 70 65 5 Pd - Watts Efficiency - % 80 2.5 2 1.5 1 0.5 0.1 4 3 2 60 1 55 50 0 0 1 2 3 4 5 6 7 0 8 1 2 3 Io1 (A) Vo1 Output Ripple vs Io1 (See Note A) 5 6 7 60 80 Ambient Temperature (°C) 90 40 30 20 10 Airflow 70 200LFM 120LFM 60LFM Nat conv 60 50 40 30 0 20 0 1 2 3 8 Safe Operating Area, V in =12V (See Note B) 70 50 Ripple - mV 4 Io1 (A) 4 5 6 7 8 0 Io1 (A) [ Io2 fixed at Io2(typ) ] 1 2 3 4 5 6 Io1 (A) [ Io2 fixed at Io2(typ) ] Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures For technical support and more information, see inside back cover or visit www.ti.com 7 8 PT6982 10.5-A 12V-Input Dual Output Integrated Switching Regulator PT6982 Performance Specifications (Unless otherwise stated, T a =25°C, Vin =12V, C1 =560µF, C 2 =330µF, Io 1 =Io1typ, and Io2 =Io 2typ) Characteristic Symbol Conditions Output Current Ta =25°C, natural convection Input Voltage Range Set Point Voltage Tolerance Io1 Io2 Io1 Io2 Vin Vo tol Temperature Variation Regtemp –40° >Ta > +85°C Line Regulation Regline Over Vin range Load Regulation Regload Over Io range Total Output Voltage Variation ∆Votot Includes set-point, line, load –40° >Ta > +85°C Efficiency Vo Ripple (pk-pk) η Vr Transient Response ttr Min Vo1 (3.3V) Vo2 (2.5V) Vo1 (3.3V) Vo2 (2.5V) Ta =60°C, 200LFM airflow 0.1 (i) 0 0.1 (i) 0 10.8 — — — — — — — — — — — — — — — — Over Io Range Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 20MHz bandwidth Vo1 Vo2 1A/µs load step, 50% to 100% Iotyp Vo over/undershoot ∆Vtr PT6982 (3.3V/2.5V) Typ Max Vo1 Vo2 8.5 (ii) 2 (ii) 8.5 (ii) 2 (ii) — ±16 ±12 ±1.0 ±0.5 ±10 ±5 ±10 ±10 ±69 ±39 84 35 35 60 ±50 ±30 Units 10.5 (iii) 2.25 (iii) 10.5 (iii) 2.25 (iii) 13.2 ±50 ±38 — — ±15 ±7 ±15 ±13 — — — — — — — — A A VDC mV %Vo mV mV mV % mVpp µs mV Notes: (i) Io 1(min) current of 0.1A can be divided between both outputs, Vo1 or Vo2. The module will operate at no load with reduced specifications. (ii) The typical current is that which can be drawn simultaneously from both outputs under the stated operating conditions. (iii) The sum of Io 1 and Io2 must be less than Io1max, and Io 2 must be less than Io2max. PT6982 Typical Characteristics Efficiency vs Io1 (See Note A) Power Dissipation vs Io 1 (See Note A) 90 7 85 6 5 Io2 (A) 75 1 1.5 2 70 65 Pd - Watts Efficiency - % 80 Io2 (A) 2 1.5 1 0.1 4 3 2 60 1 55 50 0 0 1 2 3 4 5 6 7 8 0 1 2 3 4 Io1 (A) Vo1 Output Ripple vs Io 1 (See Note A) 6 7 8 Safe Operating Area, V in =12V (See Note B) 90 60 80 Ambient Temperature (°C) 70 50 Ripple - mV 5 Io1 (A) 40 30 20 70 Airflow 200LFM 120LFM 60LFM Nat conv 60 50 40 30 10 20 0 0 1 2 3 4 5 6 Io1 (A) [ Io2 fixed at Io2(typ) ] 7 8 0 1 2 3 4 5 6 7 8 Io1 (A) [ Io2 fixed at Io2(typ) ] Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures For technical support and more information, see inside back cover or visit www.ti.com PT6983 9.5-A 12V-Input Dual Output Integrated Switching Regulator PT6983 Performance Specifications (Unless otherwise stated, T a =25°C, Vin =12V, C1 =560µF, C 2 =330µF, Io1 =Io1typ, and Io2 =Io 2typ) Characteristic Symbol Conditions Output Current Ta =25°C, natural convection Input Voltage Range Set Point Voltage Tolerance Io1 Io2 Io1 Io2 Vin Vo tol Temperature Variation Regtemp –40° >Ta > +85°C Line Regulation Regline Over Vin range Load Regulation Regload Over Io range Total Output Voltage Variation ∆Votot Includes set-point, line, load –40° >Ta > +85°C Efficiency Vo Ripple (pk-pk) η Vr Transient Response ttr Vo1 (3.3V) Vo2 (1.8V) Vo1 (3.3V) Vo2 (1.8V) Ta =60°C, 200LFM airflow 0.1 (i) 0 0.1 (i) 0 10.8 — — — — — — — — — — — — — — — — Over Io Range Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 20MHz bandwidth Vo1 Vo2 1A/µs load step, 50% to 100% Iotyp Vo over/undershoot ∆Vtr PT6983 (3.3V/1.8V) Typ Max Min Vo1 Vo2 7.5 (ii) 2 (ii) 7.5 (ii) 2 (ii) — ±16 ±9 ±1.0 ±0.5 ±10 ±5 ±10 ±5 ±69 ±28 81 35 35 60 ±50 ±20 Units 9.5 (iii) 2 (iii) 9.5 (iii) 2 (iii) 13.2 ±50 ±27 — — ±15 ±7 ±15 ±7 — — — — — — — — A A VDC mV %Vo mV mV mV % mVpp µs mV Notes: (i) Io1(min) current of 0.1A can be divided between both outputs, Vo1 or Vo2. The module will operate at no load with reduced specifications. (ii) The typical current is that which can be drawn simultaneously from both outputs under the stated operating conditions. (iii) The sum of Io1 and Io2 must be less than Io1max, and Io 2 must be less than Io2max. PT6983 Typical Characteristics Efficiency vs Io1 (See Note A) Power Dissipation vs Io 1 (See Note A) 90 8 85 7 6 Io2 (A) Io2 (A) 75 1 1.5 2 70 65 Pd - Watts Efficiency - % 80 5 2 1.5 1 0.1 4 3 60 2 55 1 0 50 0 1 2 3 4 5 6 0 7 1 2 3 Vo1 Output Ripple vs Io1 (See Note A) 5 6 7 Safe Operating Area, V in =12V (See Note B) 90 60 80 Ambient Temperature (°C) 70 50 Ripple - mV 4 Io1 (A) Io1 (A) 40 30 20 10 Airflow 70 200LFM 120LFM 60LFM Nat conv 60 50 40 30 0 20 0 1 2 3 4 5 6 7 0 Io1 (A) [ Io2 fixed at Io2(typ) ] 1 2 3 4 5 6 Io1 (A) [ Io2 fixed at Io2(typ) ] Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures For technical support and more information, see inside back cover or visit www.ti.com 7 PT6984 8.6-A 12V-Input Dual Output Integrated Switching Regulator PT6984 Performance Specifications (Unless otherwise stated, T a =25°C, Vin =12V, C1 =560µF, C 2 =330µF, Io 1 =Io1typ, and Io2 =Io 2typ) Characteristic Symbol Conditions Output Current Ta =25°C, natural convection Input Voltage Range Set Point Voltage Tolerance Io1 Io2 Io1 Io2 Vin Vo tol Temperature Variation Regtemp –40° >Ta > +85°C Line Regulation Regline Over Vin range Load Regulation Regload Over Io range Total Output Voltage Variation ∆Votot Includes set-point, line, load –40° >Ta > +85°C Efficiency Vo Ripple (pk-pk) η Vr Transient Response ttr Vo1 (3.3V) Vo2 (1.2V) Vo1 (3.3V) Vo2 (1.2V) Ta =60°C, 200LFM airflow 0.1 (i) 0 0.1 (i) 0 10.8 — — — — — — — — — — — — — — — — Over Io Range Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 20MHz bandwidth Vo1 Vo2 1A/µs load step, 50% to 100% Iotyp Vo over/undershoot ∆Vtr PT6984 (3.3V/1.2V) Typ Max Min Vo1 Vo2 7 (ii) 1.6 (ii) 7 (ii) 1.6 (ii) — ±16 ±6 ±1.0 ±0.5 ±10 ±5 ±10 ±5 ±69 ±22 78 35 35 60 ±50 ±20 Units 8.6 (iii) 1.6 (iii) 8.6 (iii) 1.6 (iii) 13.2 ±50 ±18 — — ±15 ±7 ±15 ±7 — — — — — — — — A A VDC mV %Vo mV mV mV % mVpp µs mV Notes: (i) Io 1(min) current of 0.1A can be divided between both outputs, Vo1 or Vo2. The module will operate at no load with reduced specifications. (ii) The typical current is that which can be drawn simultaneously from both outputs under the stated operating conditions. (iii) The sum of Io 1 and Io2 must be less than Io1max, and Io 2 must be less than Io2max. PT6984 Typical Characteristics Efficiency vs Io1 (See Note A) Power Dissipation vs Io 1 (See Note A) 90 8 85 7 0.5 0.75 1 1.25 1.6 75 70 65 Io2 (A) 6 Io2 (A) Pd - Watts Efficiency - % 80 4 3 60 2 55 1 50 1.6 1.25 1.0 0.75 0.5 0.1 5 0 0 1 2 3 4 5 6 7 0 1 2 3 Io1 (A) Vo1 Output Ripple vs Io 1 (See Note A) 5 6 7 Safe Operating Area, V in =12V (See Note B) 90 60 80 Ambient Temperature (°C) 70 50 Ripple - mV 4 Io1 (A) 40 30 20 Airflow 70 200LFM 120LFM 60LFM Nat conv 60 50 40 30 10 20 0 0 1 2 3 4 Io1 (A) [ Io2 fixed at Io2(typ) ] 5 6 7 0 1 2 3 4 5 6 7 Io1 (A) [ Io2 fixed at Io2(typ) ] Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures For technical support and more information, see inside back cover or visit www.ti.com PT6985 9-A 12V-Input Dual Output Integrated Switching Regulator PT6985 Performance Specifications (Unless otherwise stated, T a =25°C, Vin =12V, C1 =560µF, C 2 =330µF, Io1 =Io1typ, and Io2 =Io 2typ) Characteristic Symbol Conditions Output Current Ta =25°C, natural convection Input Voltage Range Set Point Voltage Tolerance Io1 Io2 Io1 Io2 Vin Vo tol Temperature Variation Regtemp –40° >Ta > +85°C Line Regulation Regline Over Vin range Load Regulation Regload Over Io range Total Output Voltage Variation ∆Votot Includes set-point, line, load –40° >Ta > +85°C Efficiency Vo Ripple (pk-pk) η Vr Transient Response ttr Vo1 (2.5V) Vo2 (1.2V) Vo1 (2.5V) Vo2 (1.2V) Ta =60°C, 200LFM airflow 0.1 (i) 0 0.1 (i) 0 10.8 — — — — — — — — — — — — — — — — Over Io Range Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 Vo1 Vo2 20MHz bandwidth Vo1 Vo2 1A/µs load step, 50% to 100% Iotyp Vo over/undershoot ∆Vtr PT6985 (2.5V/1.2V) Typ Max Min Vo1 Vo2 7 (ii) 2 (ii) 7 (ii) 2 (ii) — ±12 ±6 ±0.5 ±0.5 ±10 ±5 ±10 ±5 ±44 ±22 77 35 35 60 ±50 ±20 Units 9 (iii) 2.2 (iii) 9 (iii) 2.2 (iii) 13.2 ±38 ±18 — — ±15 ±7 ±15 ±7 — — — — — — — — A A VDC mV %Vo mV mV mV % mVpp µs mV Notes: (i) Io1(min) current of 0.1A can be divided between both outputs, Vo1 or Vo2. The module will operate at no load with reduced specifications. (ii) The typical current is that which can be drawn simultaneously from both outputs under the stated operating conditions. (iii) The sum of Io1 and Io2 must be less than Io1max, and Io 2 must be less than Io2max. PT6985 Typical Characteristics Efficiency vs Io1 (See Note A) Power Dissipation vs Io 1 (See Note A) 90 7 85 6 5 Io2 (A) 75 1 1.5 2 70 65 Pd - Watts Efficiency - % 80 Io2 (A) 2 1.5 1 0.1 4 3 2 60 1 55 50 0 0 1 2 3 4 5 6 0 7 1 2 3 Io1 (A) Vo1 Output Ripple vs Io1 (See Note A) 5 6 7 Safe Operating Area, V in =12V (See Note B) 90 30 80 Ambient Temperature (°C) 25 20 Ripple - mV 4 Io1 (A) 15 10 5 Airflow 70 200LFM 120LFM 60LFM Nat conv 60 50 40 30 20 0 0 1 2 3 4 5 6 7 0 Io1 (A) [ Io2 fixed at Io2(typ) ] 1 2 3 4 5 Io1 (A) [ Io2 fixed at Io2(typ) ] Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures For technical support and more information, see inside back cover or visit www.ti.com 6 7 Application Notes PT6980 Series Capacitor Recommendations for the Dual-Output PT6980 Regulator Series Input Capacitors: The recommended input capacitance is determined by 1.0 ampere minimum ripple current rating and 330µF minimum capacitance . Ripple current and <100mΩ equivalent series resistance (ESR) values are the major considerations, along with temperature, when designing with different types of capacitors. Tantalum capacitors have a recommended minimum voltage rating of 2 × the maximum DC voltage + AC ripple. This is necessary to insure reliability for input voltage bus applications Output Capacitors: C2(Required), C3(Optional) The ESR of the required capacitor (C2) must not be greater than 50mΩ. Electrolytic capacitors have poor ripple performance at frequencies greater than 400kHz but excellent low frequency transient response. Above the ripple frequency, ceramic capacitors are necessary to improve the transient response and reduce any high frequency noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers are identified in Table 1. The optional 100µF capacitor (C3) for V2out can have an ESR of up to 200mΩ for optimum performance and ripple reduction. (Note: Vendor part numbers for the optional capacitor, C3, are not identified in the table. Use the same series selected for C2) Tantalum Capacitors Tantalum type capacitors may be used at the output, but only the AVX TPS series, Sprague 593D/594/595 series, or Kemet T495/T510 series. The AVX TPS series, Kemet or Sprague series tantalums are recommended over many other types due to their higher rated surge, power dissipation, and ripple current capability. As a caution, the TAJ series by AVX is not recommended. This series has considerably higher ESR, reduced power dissipation and lower ripple current capability. The TAJ Series is also less reliable than the AVX TPS series when determining power dissipation capability. Tantalum or Oscon® types are recommended for applications where ambient temperatures fall below 0°C. Capacitor Table Table 1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The number of capacitors required at both the input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The RMS ripple current rating and ESR (Equivalent Series Resistance at 100kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. Table 1: Input/Output Capacitors Capacitor Vendor/ Component Series Capacitor Characteristics Quantity Working Voltage Value(µF) (ESR) Equivalent Series Resistance 85°C Maximum Ripple Current(Irms) Physical Size(mm) Input Bus Output Bus Vendor Number Panasonic FC 35V 35V 50V 680µF 560µF 680µF 0.043Ω 0.038Ω 0.048Ω 1690mA 1655mA 1835mA 16x15 12.5x20 16x20 1 1 1 1 1 1 EEUFC1V681S EEUFC1V561S EEUFC1H681 Un ited Chemi-con LXV/LXZ/ FX/FS 35V 50V 10V 20V 680µF 680µF 390µF 150µF 0.038Ω 0.048Ω 0.030Ω 0.024Ω 1660mA 1840mA 3080mA 3200mA 12.5x20 16x20 8x10.5 8x10.5 1 1 N/R 4 1 1 1 2 LXZ35VB681M112X20LL LXZ50VB681M16X20LL 10FX390M 20FX150M Nichicon PL/ PM 35V 25V 35V 560µF 820µF 560µF 0.048Ω 0.049Ω 0.0048Ω 1360mA 1340mA 1360mA 16x15 16x15 16x15 1 1 1 1 1 1 UPL1V561MHH6 UPL1E821MHH6 UPM1V561MHH6 Panasonic FC Surface Mtg 35V 35V 35V 330µF 1000µF 470µF 0.065÷2Ω 0.038Ω 0.043Ω >1205mA 2000mA 1690mA 12.5x16.5 18x16.5 16x16.5 2 1 2 1 1 EEVFC1V331LQ EEVFC1V1021N EEVFC1V471N 10V 10V 330µF 330µF 0.025Ω 0.025Ω >3500mA >3800mA 10.0x10.5 10.3x10.3 N/R N/R 1 1 10SS330M 10SV330M Surface Mount(SV) 10V 10V 330µF 220µF 0.060÷2Ω 0.060÷2Ω >2500mA >3000mA 7.3Lx 4.3Wx N/R N/R 2 2 TPSV337M010R0060 TPSV227M010R0060 10V 10V 330µF 220µF 0.033Ω 0.07Ω÷2 =0.035Ω 1400mA >2000mA 7.3Lx5.7W x 4.0H N/R N/R 1 2 T510X337M010AS T495X227M010AS 10V 330µF 0.045Ω 2350mA N/R 1 594D337X0010R2T Oscon SS/SV AVX Tantalum TPS Kemet T510 T495 Sprague 594D 7.3Lx 6.0Wx 4.1H N/R –Not recommended. The voltage rating does not meet the minimin operating limits. For technical support and more information, see inside back cover or visit www.ti.com Application Notes PT6980 Series Adjusting the Output Voltage of the PT6980 Dual-Output Voltage Regulators Each output voltage from the PT6980 series of integrated switching regulators (ISRs) can be independently adjusted higher or lower than the factory trimmed pre-set voltage. The voltages, Vo1 and Vo2 may be adjusted either up or down using a single external resistor 1. Table 1 gives the adjustment range for both Vo1 and Vo2 for each model in the series as Va(min) and Va(max). Note that Vo2 must always be lower than Vo1 2. Vo1 Adjust Up: To increase the output, add a resistor R4 between pin 16 (V1 Adjust) and pins 7-11 (GND) 1. Vo1 Adjust Down: Add a resistor (R3), between pin 16 (Vo1 Adjust) and pin 1 (Vo1 Sense) 1. 3. Both the Vo1 and Vo2 may be adjusted down to an alternative bus voltage by making, (R3) or (R1) respectively, a zero ohm link. Refer to the Table 1 footnotes for guidance. 4. Never connect capacitors to either the Vo1 Adjust or Vo2 Adjust pins. Any capacitance added to these control pins will affect the stability of the respective regulated output. 5. Adjusting either voltage (Vo1 or Vo2) may increase the power dissipation in the regulator, and change the maximum current available at either output. Consult the note on p.2 of the data sheet regarding Vo1/Vo2 loading. The adjust up and adjust down resistor values can also be calculated using the following formulas. Be sure to select the correct formula parameter from Table 1 for the output and model being adjusted. Vo2 Adjust Up: Add a resistor R2 between pin 23 (Vo2 Adjust) and pins 7-11 (GND) 1. Vo2 Adjust Down: Add a resistor (R1) between pin 23 (Vo2 Adjust) and pin 22 (Vo2 Sense) 1. Refer to Figure 1 and Table 2 for both the placement and value of the required resistor. Notes: 1. Use only a single 1% resistor in either the (R3) or R4 location to adjust Vo1, and in the (R1) or R2 location to adjust Vo2. Place the resistor as close to the ISR as possible. 2. Vo2 must always be at least 0.2V lower than Vo1. 10 (Va – Vr ) Vo – Va – Rs kΩ – Rs kΩ (R1) or (R3) = (R2) or (R4) = Where: Vo Va Vr Rs = Original output voltage, (Vo1 or Vo2) = Adjusted output voltage = The reference voltage from Table 1 = The series resistance from Table 1 10 · Vr Va – Vo Figure 1 22 1 Vo 2 (sns) Vo 1 (sns) Vo 2 4,5,6 V IN Vo 1 STBY 3 + 18 - 21 Vo 2 12 - 15 Vo 1 PT6980 Vin GND 7 - 11 Vo 2 (adj) Vo 1 (adj) 23 16 (R3) Adj Down (R1) C1 + C2 R4 Adjust Up + C3 L O A D L O A D R2 COM COM Adjust Vo 1 For technical support and more information, see inside back cover or visit www.ti.com Adjust Vo 2 Application Notes PT6980 Series Table 1 ADJUSTMENT RANGE AND FORMULA PARAMETERS Vo1 Bus Series Pt # Adj. Resistor Vo(nom) Va(min) Va(max) Vr Ω) Rs (kΩ Ref. Note 3: PT6981/85 (R3)/R4 PT6982/83/84 (R3)/R4 Vo2 Bus (2) PT6984/85 (R1)/R2 PT6981/83 (R1)/R2 PT6936 (R1)/R2 2.5V 1.8V * 3.6V 1.27V 7.5 3.3V 2.5V * 3.6V 1.27V 15.4 1.2V 1.0V † 1.5V # 0.6125V 20.0 1.8V 1.5V † 2.4V 1.0V 16.9 2.5V 1.8V † 3.0 1.0V 11.5 Vo2 Bus Series Pt # Adj. Resistor PT6984/85 (R1)/R2 PT6981/83 (R1)/R2 1.2V 1.8V * (R3) = Zero-ohm link †(R1) = Zero-ohm link # (R2) = Zero-ohm link Table 2 ADJUSTMENT RESISTOR VALUES Vo1 Bus Series Pt # Adj. Resistor Vo(nom) Va(req’d) 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 PT6981/85 (R3)/R4 PT6982/83/84 (R3)/R4 2.5V 3.3V (0.0) (1.4)kΩ (3.0)kΩ (4.9)kΩ (7.1)kΩ (9.8)kΩ (13.3)kΩ (23.5)kΩ (44.0)kΩ (106.0)kΩ 120.0kΩ 56.0kΩ 34.8kΩ 24.3kΩ 17.9kΩ 13.7kΩ 10.6kΩ 8.4kΩ 6.6kΩ 5.2kΩ 4.1kΩ (0.0)kΩ (3.6)kΩ (8.4)kΩ (15.2)kΩ (25.4)kΩ (42.3)kΩ (76.1)kΩ (178.0)kΩ 112.0k 48.1k 26.9k Vo(nom) Va(req’d) 1.0 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 PT6982 (R1)/R2 2.5V (0.0)kΩ (9.2)kΩ (28.8)kΩ (87.5)kΩ 101.5kΩ 41.2kΩ 20.8kΩ 10.6kΩ 4.5kΩ 0.0kΩ (0.0)kΩ (5.1)kΩ (13.1)kΩ (26.4)kΩ (53.1)kΩ (133.0)kΩ 183.0kΩ 83.1kΩ 49.8kΩ 33.1kΩ 23.1kΩ 16.4kΩ 8.1kΩ 3.1kΩ 0.0kΩ (0.0)kΩ (1.6)kΩ (3.5)kΩ (5.8)kΩ (8.5)kΩ (11.8)kΩ (16.0)kΩ (28.5)kΩ (53.5)kΩ (129.0)kΩ 88.5kΩ 38.5kΩ 21.8kΩ 13.5kΩ 8.5kΩ R1/R3 = (Blue), R2/R4 = Black For technical support and more information, see inside back cover or visit www.ti.com Application Notes PT6980 Series Using the Standby Function on the PT6980 Series of Dual-Output Voltage Regulators Both output voltages of the 23-pin PT6980 dual-output converter may be disabled using the regulator’s ‘Standby’ function. This function may be used in applications that require power-up/shutdown sequencing, or wherever there is a requirement to control the output voltage On/Off status with external circuitry. The standby function is provided by the STBY* control (pin 3). If pin 3 is left open-circuit the regulator operates normally, and provides a regulated output at both Vo1 (pins 12–15) and Vo2 (pins 18–21) whenever a valid supply voltage is applied to Vin (pins 4, 5, & 6) with respect to GND (pins 7-11). If a low voltage1 is then applied to pin-3 both regulator outputs will be simultaneously disabled and the input current drawn by the ISR will drop to a typical value of 4mA. The standby control may also be used to hold-off both regulator outputs during the period that input power is applied. The standby pin is ideally controlled using an open-collector (or open-drain) discrete transistor (See Figure 1). The open-circuit voltage is the input voltage +Vin. Table 1 gives the circuit parameters for this control input. Table 1 Standby Control Parameters Parameter Min Enable (VIH) Disable (VIL) VSTBY (open circuit) ISTBY (IIL) — –0.1V — — 1, 2 TYP Max — — +Vin 2 — Open circuit 0.4V 1 — –0.5mA Figure 1 22 V 2 (sns) V in 4, 5, 6 V o2 V IN PT6984 V o1 18–21 Vo 2 12–15 Vo 1 STBY G N D V 2 (adj) V 1 (adj) 7–11 23 3 16 + C1 Q1 BSS138 + C2 + C3 Inhibit COM COM Turn-On Time: Turning Q1 in Figure 1 off removes the lowvoltage signal at pin 3 and enables the PT6980 series regulator. Following a delay of about 25ms, Vo1 and Vo2 rise together until the lower voltage, Vo2, reaches its set output. Vo1 continues to rise until both outputs reach full regulation voltage. The total power-up time is less than 40ms, and is relatively independent of load, temperature, and output capacitance. Figure 2 shows waveforms of the output voltages, Vo1 and Vo2, for a PT6984 (3.3V/1.2V). The turn-off of Q1 corresponds to the rise in VSTBY. The waveforms were measured with a 12V input voltage, and with resistive loads of 5A and 1.25A at the Vo 1 and Vo 2 outputs respectively. Figure 2 Notes: 1. The standby control input is Not compatible with TTL or other devices that incorporate a totem-pole output drive. Use only a true open-collector device, preferably a discrete bipolar transistor (or MOSFET). To ensure the regulator output is disabled, the control pin must be pulled to less than 0.4Vdc with a low-level 0.5mA sink to ground. V1 (1V/Div) V2 (1V/Div) Vstby (10V/Div) 2 The standby control input requires no external pull-up resistor. The open-circuit voltage of the STBY* pin is the input voltage +Vin. 3. When the regulator output is disabled the current drawn from the input source is typically reduced to 4mA. 1 V 1 (sns) HORIZ SCALE: 5ms/Div For technical support and more information, see inside back cover or visit www.ti.com PACKAGE OPTION ADDENDUM www.ti.com 13-Oct-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty Lead/Ball Finish MSL Peak Temp (3) PT6981C ACTIVE SIP MOD ULE ELH 23 10 TBD Call TI Level-3-215C-168HRS PT6982C ACTIVE SIP MOD ULE ELH 23 10 TBD Call TI Level-3-215C-168HRS PT6982N ACTIVE SIP MOD ULE ELF 23 10 TBD Call TI Level-1-215C-UNLIM PT6983A ACTIVE SIP MOD ULE ELG 23 10 TBD Call TI Level-1-215C-UNLIM PT6983C ACTIVE SIP MOD ULE ELH 23 10 TBD Call TI Level-3-215C-168HRS PT6983N ACTIVE SIP MOD ULE ELF 23 10 TBD Call TI Level-1-215C-UNLIM PT6984C ACTIVE SIP MOD ULE ELH 23 10 TBD Call TI Level-3-215C-168HRS PT6984N ACTIVE SIP MOD ULE ELF 23 10 TBD Call TI Level-1-215C-UNLIM (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) 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. 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. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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