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PT78SR115S Datasheet(PDF) 1 Page - Texas Instruments |
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PT78SR115S Datasheet(HTML) 1 Page - Texas Instruments |
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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 22 Application Notes Mechanical Outline Product Selector Guide Revised 5/15/98 PT79SR100 Series -1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR • High Efficiency > 85% • Self-Contained Inductor • Short Circuit Protection • Over-Temperature Protection The PT79SR100 Series is a new line of Negative Input/Negative Out- put 3-terminal Integrated Switching Regulators (ISRs). These ISRs have a maximum output current of -1.5 Amps and an output voltage that is laser trimmed to most industry standard volt- ages. They have excellent line and load regulation, and are ideal for applications, such as RS232 and Ethernet communica- tions, ECL logic, and op-amp circuitry. PT79SR1 COM COM -Vin C1 1 23 C2 D1 -Vout Pin-Out Information Pin Function 1 GND 2-Vin 3-Vout Ordering Information PT79SR1 XX Y Output Voltage 05 = -5.0 Volts 52 = -5.2 Volts 08 = -8.0 Volts 09 = -9.0 Volts 12 = -12.0 Volts 15 = -15.0 Volts Package Suffix V = Vertical Mount S = Surface Mount H = Horizontal Mount Standard Application C1 = Optional ceramic (1µF) C2 = Optional ceramic (1-5µF) D1 = Zener diode required to clamp turn-on overshoot (See Application Note) Specifications Characteristics PT79SR100 SERIES (T a = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Over Vin range -0.1* — -1.5 A Short Circuit Current Isc Vin=Vo-4V — -3.5 — Apk Input Voltage Range Vin Io=-0.1 to -1.5 A Vo=-5V -9 — -30 V -0.1 ≥ Io ≥ -1.5 A Vo=-15V -19 — -30 V Output Voltage Tolerance ∆Vo Over Vin range, Io=-1.5 A — ±1.0 ±3.0 %Vo Ta=-20°C to shutdown Line Regulation Regline Over Vin range — ±1.0 ±2.0 %Vo Load Regulation Regload -0.1 ≤ Io ≤ -1.5 A — ±0.5 ±1.0 %Vo Vo Ripple/Noise Vn Vin=-15V, Io=-1.0 A,Vo=-5V — 35 — mVpp Transient Response ttr 50% load change — 100 — µSec Vo=overshoot/undershoot — 30 — %Vo Efficiency η Vin=-10V, Io=-1.0A, Vo=-5V — 85 — % Switching Frequency ƒo Over Vin and Io ranges 0.95 1.0 1.05 MHz Absolute Maximum Ta -40 — +85 °C Operating Temperature Range 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 Temperature Coefficient Tc Over Vin and Io ranges — ±0.5 ±1.5 mV/°C 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 — — — 7.0 — Grams * ISR will operate down to no load with reduced specifications. ** See Thermal Derating chart. Pkg Style 500 |
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