For assistance or to order, call Application Notes Mechanical Outline Product Selector Guide (800) 531-5782 PT3300 Series 30 WATT POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR The PT3300 is a new series of highinput voltage, 30 Watt, non-isolated Integrated Switching Regulators (ISRs) housed in a 19-pin SIP package. The 20 to 60 V input range allows easy integration into many distributed power applications which utilize 24, 28, or 48V bus architechures. The PT3300 series is available with 3.3, 5, 12, or 15V outputs. The output voltage is adjustable from 90 to 110% of nominal with the addition of an external resistor. Other easy to use features include an inhibit function and remote sense which automatically compensates for any voltage drop from the ISR to the load. As with other Power Trends’ products, the PT3300 includes built in current limit, short circuit protection and over-temperature shutdown. The PT3300 requires a 330µF output capacitor for proper operation. Pin-Out Information Ordering Information Standard Application VO Adjust Inhibit 2 VIN 7-9 CIN + 3 19 PT3300 4-6 REMOTE SENSE VO 14-17 10-13 COUT VINGND + LOAD VOGND Cin = Optional 100µF/100V electrolytic Cout = Required 330µF electrolytic Note: Pins 4,5,6 and pins 10,11,12,13 are connected internally. Specifications Pin Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Do Not Use Inhibit Vo Adjust Vin GND Vin GND Vin GND Vin Vin Vin Vo GND Vo GND Vo GND Vo GND Vo Vo Vo Vo Do Not Use Remote Sense Features PT3301o = +3.3 Volts PT3302o = +5.0 Volts PT3303o = +12.0 Volts PT3304o = +15.0 Volts PT Series Suffix (PT1234X) Case/Pin Configuration Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount Revised 5/15/98 N A C • 30W Output Power • Input Voltage Range: 20V to 60V • High Efficiency • Vo Inhibit • Vo Adjust • Remote Sense • Current Limit • Short-Circuit Protection • Over-Temperature Shutdown • 19-pin SIP Package (For dimensions and PC board layout, see Package Styles 820 and 830.) PT3300 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Output Current Io Over Vin range Short Circuit Current Isc Vin = +25V — 2×Imax — — Input Voltage Range Vin 0.5 ≤ Io ≤ Imax 20 — 60 V Output Voltage Tolerance ∆Vo Over Vin range, Io = Imax 0°C ≤ Ta ≤ +60°C — ±1 ±3 %Vo Line Regulation Regline Over Vin range — ±0.5 ±1 %Vo Load Regulation Regload 0.5 ≤ Io ≤ Imax — ±0.5 ±1 %Vo Vo Adjust Range Vo adj Over Vin and Io ranges 90 — 110 %Vo Vo Ripple/Noise Vn Vin = +24V, Io = Imax — 2 3 %Vo Transient Response with Cout = 330µF ttr Vos 25% load change Vo over/undershoot — — 100 2 250 5 µSec %Vo — — — 80 85 87 — — — % % % 600 750 900 kHz -20 — +85 °C -20 — +65** °C Efficiency η Switching Frequency ƒo Absolute Maximum Operating Temperature Range Ta Recommended Operating Temperature Range Ta Vin = +24V, Io = 0.5×Imax Vo = +3.3V Vo = +5.0V Vo = +12.0V Vo = +15.0V Vo = +3.3V Vo = +5.0V Vo = +12.0V Over Vin and Io ranges Free air convection Over Vin and Io ranges Min Typ Max Units 0.50* 0.50* 0.25* 0.20* — — — — 8.0 6.0 2.5 2.0 A A A A Storage Temperature Ts — -40 — +125 °C Mechanical Shock — Per Mil-STD-883D, Method 2002.3 — 500 — G’s Mechanical Vibration — Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, soldered in a PC board — 10 — G’s Weight — — — 35 — grams *ISR will operate down to no load with reduced specifications. ** See Thermal Derating Curve Note: The PT3300 Series requires a 330µF electrolytic or tantalum output capacitor for proper operation in all applications. 20 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com For assistance or to order, call (800) 531-5782 PT3300 CHARACTERISTIC DATA Efficiency vs Output Current Efficiency vs Output Current 100 10 0 90 Vin 80 20.0V 24.0V 30.0V 36.0V 48.0V 60.0V 70 60 Efficiency % Efficiency % 90 50 Vin 80 20.0V 24.0V 30.0V 36.0V 48.0V 60.0V 70 60 50 40 0 1 2 3 4 5 6 7 40 8 0 1 2 Output Current (Amps) 3 4 5 6 Output Current (Amps) Ripple vs Output Current Ripple vs Output Current 60 100 80 50 Vin Vin Ripple (mV) Ripple (mV) (See Note 1) 60.0V 48.0V 36.0V 30.0V 24.0V 20.0V 60 40 40 60.0V 48.0V 36.0V 30.0V 24.0V 20.0V 30 20 20 10 0 0 0 1 2 3 4 5 6 7 0 8 1 Output Current (Amps) 2 3 4 5 6 Output Current (Amps) Iout-(Amps) Thermal Derating (Ta) (See Note 2) ˝ 6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 20 25 30 85°C 35 40 45 50 55 60 Vin-(Volts) Power Dissipation vs Output Current Power Dissipation vs Output Current 7 7 6 6 5 60.0V 48.0V 36.0V 30.0V 24.0V 20.0V 4 3 Pd (Watts) Pd (Watts) Vin 5 Vin 4 60.0V 48.0V 36.0V 30.0V 24.0V 20.0V 3 2 2 1 1 0 0 0 1 2 3 4 Output Current (Amps) 5 6 7 0 1 2 3 4 5 6 Output Current (Amps) Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the DC-DC converter. Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.) Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 21 DATA SHEETS PT3302, 5.0 VDC (See Note 1) Wide Input Range Products PT3301, 3.3 VDC Series For assistance or to order, call Application Notes (800) 531-5782 PT3300 Series More Applcation Notes Adjusting the Output Voltage of the PT3300 Wide Input Range Switching Regulator The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulae. The output voltage of the Power Trends PT3300 Series ISRs may be adjusted over a ±10% range from the factory trimmed pre-set voltage. This is accomplished with the addition of a single external resistor. Table 1 accordingly gives the allowable adjustment range for each model in the series as Va (min) and Va (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 3 (Vo adjust) and pins 10-13 (Vo GND) Adjust Down: Add a resistor (R1), between pin 3 (Vo adjust) and pins 14-17 (Vout). Refer to Figure 1 and Table 2 for both the placement and value of the required resistor, either (R1) or R2 as appropriate. Notes: (R1) = Ro (Vo – 1)(Va – 1) pt5040 (Vo – Va) R2 = Ro (Vo – 1) - 0.48 Va - Vo Where: Vo Va Ro Series Pt # Current Vo(nom) Va(req’d) PT3301 8Adc 3.3Vdc (572.0)kΩ 3.2 (1200.0)kΩ 2. Never connect capacitors from Vo adjust to either GND or Vout . Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3.4 545.0kΩ 3.5 272.0kΩ 3.6 181.0kΩ Figure 1 19 Vo(Sense) 7,8,9 V in PT3300 Vin INH Vin GND 2 C in 1 0 0 µF, 100V (Optional) 4, 5, 6 Vo Vo GND 14 - 17 V out Vo(adj) 10 - 13 3 (R1) Adj Down + C out 3 3 0 µF + R2 Adjust Up COM Table 1 PT3300 ADJUSTMENT AND FORMULA PARAMETERS Series Pt # PT3303 2.5Adc 12.0Vdc PT3304 2Adc 15.0Vdc 3.3 4.5 (383.0)kΩ 4.6 (493.0)kΩ 4.7 (675.0)kΩ 4.8 (1040.0)kΩ 4.9 (2140.0)kΩ 5.0 5.1 548.0kΩ 5.2 274.0kΩ 5.3 182.0kΩ 5.4 137.0kΩ 5.5 109.0kΩ 10.8 (448.0)kΩ 11.0 (548.0)kΩ 11.2 (699.0)kΩ 11.4 (951.0)kΩ 11.6 (1450.0)kΩ 12.0 L O A D COM PT3302 6Adc 5.0Vdc (363.0)kΩ 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 5. Adjusting Vout higher than that defined for the model raises the minimum input voltage by the same percentage. kΩ = Original output voltage = Adjustd output voltage = The value in Table 1 3.1 4. If the Remote Sense feature is being used, connecting the resistor (R1) between pin 3 (Vo adjust) and pin 19 (Remote Sense) can benifit load regulation. kΩ Table 2 PT3300 ADJUSTMENT RESISTOR VALUES 3.0 3. Vin GND and Vo GND are connected internally and may be treated as common on the PT3300 ISR series. - 0.48 12.2 274.0kΩ 12.4 137.0kΩ 12.6 91.0kΩ 12.8 68.1kΩ 13.0 54.4kΩ 13.2 45.3kΩ 13.5 (425.0)kΩ 14.0 (664.0)kΩ (1379.0)kΩ PT3301 PT3302 PT3303 PT3304 14.5 Vo (nom) 3.3V 5.5V 12.0V 15.0V 15.0 Va (min) 3.0V 4.5V 10.8V 13.5V 15.5 102.0kΩ Va (max) 3.6V 5.5V 13.2V 16.5Vs 16.0 50.6kΩ 4.99 3.65 16.5 Ω) Ro (kΩ 23.7 13.7 R1 = (Red) 33.6kΩ R2 = Black Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 3 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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