For assistance or to order, call Application Notes Mechanical Outline Product Selector Guide (800) 531-5782 PT78HT200 S e r i e s 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR • • • • • • Standard Application Vin 1 PT78HT200 C1 2 COM This is the new generation of the PT78HT200 Series wide input range 3 terminal regulators. These ISRs have a maximum output current of 2.0 Amps. The output voltage is laser trimmed for high accuracy. These 78 series regulators have excellent line and load regulation with internal short-circuit and over-temperature protection, and are offered in a variety of standard output voltages. These ISRs are very flexible and may be used in a wide variety of applications. Pin-Out Information Ordering Information PT78HT2 XX Y Pin Function 1 V in 2 GND Output Voltage Package Suffix 3 Vout 33 = 3.3 Volts 05 = 5.0 Volts 53 = 5.25 Volts 65 = 6.5 Volts V = Vertical Mount S = Surface Mount H = Horizontal Mount Vout 3 C2 High Efficiency > 85% Wide Input Range Self-Contained Inductor Short-Circuit Protection Over-Temperature Protection Fast Transient Response Revised 5/15/98 + COM C1 = Optional 1µF ceramic C2 = Required 100µF electrolytic Pkg Style 500 Specifications PT78HT200 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Over Vin range 0.1* — 2.0 A Short Circuit Current Isc Vin = Vin min — 6.0 — Apk Input Voltage Range Vin 0.1 ≥ Io ≥ 2.0A 9 9 10.5 — — — 15 28 28 V V V Output Voltage Tolerance ∆Vo Over Vin range, Io = 2.0A — ±1.0 ±2.0 %Vo Line Regulation Regline Over Vin range — ±0.4 ±0.8 %Vo Load Regulation Regload 0.1 ≤ Io ≤ 2.0A — ±0.2 ±0.4 %Vo Vo Ripple/Noise Vn Vin = Vin min, Io = 2.0A — ±1 — %Vo Transient Response (with 100µF output cap) ttr 50% load change Vo over/undershoot — 100 5.0 — µSec %Vo Efficiency η Vin=9V, Io = 2.0A — 80 — % Switching Frequency ƒo Over Vin and Io ranges Vo=5V, 6.5V Vo=3.3V 700 950 750 1,000 800 1,050 kHz kHz Absolute Maximum Operating Temperature Range Ta — -40 — +85 °C Recommended Operating Temperature Range Ta Free Air Convection, (40-60LFM) Over Vin and Io ranges -40 — +75** °C Thermal Resistance θja Free Air Convection, (40-60LFM) — 40 — °C/W 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 — 5 — G’s Weight — — — 6.5 — Grams *ISR will operate down to no load with reduced specifications. Vo=3.3V Vo=5V Vo=6.5V Ta = 0°C to +60°C Vo=5V **See Thermal Derating chart. Note: The PT78HT200 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications. 16 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com (800) 531-5782 For assistance or to order, call PT78HT200 S e r i e s CHARACTERISTIC Efficiency vs Output Current Efficiency vs Output Current 100 100 90 Vin 80 9.0V 70 10.0V 15.0V 60 Efficiency - % 90 Efficiency - % (See Note 1) 50 Vin 80 9.0V 12.0V 15.0V 18.0V 24.0V 28.0V 70 60 50 40 40 0 0.5 1 1.5 2 0 0.5 1 1.5 2 Iout-(Amps) Iout-(Amps) Ripple vs Output Current Ripple vs Output Current 120 120 100 100 V in 26.0V 80 20.0V 15.0V 60 10.0V 9.0V 40 80 Ripple-(mV) Ripple-(mV) Vin 28.0V 24.0V 18.0V 15.0V 12.0V 9.0V 60 40 20 20 0 0 0 0.5 1 1.5 0 2 0.5 1 1.5 2 Iout-(Amps) Iout-(Amps) Thermal Derating (Ta) Thermal Derating (Ta) (See Note 2) 2 70°C 2 50°C 60°C 1.8 (See Note 2) 50°C 1.8 60°C 70°C 1.6 1.6 85°C 1.4 Iout-(Amps) Iout-(Amps) 1.4 1.2 1 0.8 1.2 85°C 1 0.8 0.6 0.6 0.4 0.4 0.2 0.2 0 0 9 12 15 18 21 24 27 9 30 12 15 18 21 24 27 30 Vin-(Volts) Vin-(Volts) Power Dissipation vs Output Current Power Dissipation vs Output Current 2.5 2.5 2 2 26.0V 1.5 20.0V 15.0V 10.0V 1 9.0V 0.5 PD-(Watts) PD-(Watts) Vi n 1.5 V in 1 28.0V 24.0V 18.0V 15.0V 12.0V 9.0V 0.5 0 0 0 0.5 1 Iout-(Amps) 1.5 2 0 0.5 1 1.5 2 Iout-(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 ISR. 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 17 DATA SHEETS PT78HT205 5.0 VDC (See Note 1) Wide Input Range Products PT78HT233 3.3 VDC DATA 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. 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