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PT78VR108S Datasheet(PDF) 1 Page - Texas Instruments |
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PT78VR108S Datasheet(HTML) 1 Page - Texas Instruments |
1 / 3 page For assistance or to order, call (800) 531-5782 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 14 Application Notes Mechanical Outline Product Selector Guide Revised 5/15/98 PT78NR100 Series Standard Application C1 = Required 100µF electrolytic C2 = Required 100µF electrolytic Ordering Information PT78NR1 Pin-Out Information Pin Function 1+Vin 2-Vout 3 GND • Negative output from positive input • Wide Input Range • Self-Contained Inductor • Short Circuit Protection • Over-Temperature Protection • Fast Transient Response The PT78NR100 Series creates a negative output voltage from a positive input voltage greater than 7V. These easy-to-use, 3-terminal, Integrated Switching Regulators (ISRs) have maximum output power of 5 watts and a negative output voltage that is laser trimmed. They also have excellent line and load regulation. 1 AMP PLUS TO MINUS VOLTAGE INTEGRATED SWITCHING REGULATOR PT78NR100 + -Vout COM COM Vin 1 3 2 C2 C1 + Specifications Characteristics PT78NR100 SERIES (T a= 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Over Vin range Vo=-5V 0.05* — 1.00 A Vo=-7, -8, -9V 0.05* — 0.55 A Vo=-12V 0.05* — 0.40 A Vo=-15V 0.05* — 0.30 A Short Circuit Current Isc Vin=10V — 4 ×Imax — Apk Inrush Current Iir Vin=10V — 4 — A tir On start-up — 0.5 — mSec Input Voltage Range Vin 0.1 ≤ Io ≤ Imax Vo=-5V 7 — 25 V Vo=-7, -8, -9V 7 — 21 V Vo=-12V 7 — 18 V Vo=-15V 7 — 15 V Output Voltage Tolerance ∆Vo Over Vin range — ±1.0 ±3.0 %Vo Ta=-20°C to +70°C Line Regulation Regline Over Vin range — ±0.5 ±1.0 %Vo Load Regulation Regload 0.1 ≤ Io ≤ Imax — ±0.5 ±1.0 %Vo Vo Ripple/Noise Vn Vin=10V, Io=Imax —±2 — %Vo Transient Response ttr 50% load change — 100 250 µSec (with 100µF output cap) Vo over/undershoot — 5.0 — %Vo Efficiency η Vin=10V, Io=0.5×Imax, Vo = -5V — 75 — % Switching Frequency ƒo Over Vin and Io ranges 600 650 700 kHz Absolute Maximum Ta Free Air Convection, (40-60LFM) -40 — +85 °C Operating Temperaturte Range Over Vin and Io Ranges Recommended Operating Ta Free Air Convection, (40-60LFM) -40 — +60** °C Temperature Range Over Vin and Io Ranges Thermal Resistance θ ja Free Air Convection, (40-60LFM) — 45 — °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, —5 — G’s 20-2000 Hz, soldered in a PC board Weight — — — 6.5 Grams *ISR will operate down to no load with reduced specifications. **See Thermal Derating chart. Note: The PT78NR100 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications. Package Suffix V = Vertical Mount S = Surface Mount H = Horizontal Mount XX Y Output Voltage 03 = -3.0 Volts 05 = -5.0 Volts 52 = -5.2 Volts 07 = -7.0 Volts 08 = -8.0 Volts 09 = -9.0 Volts 12 = -12.0 Volts 15 = -15.0 Volts Pkg Style 500 |
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