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78ST205SC Datasheet(PDF) 1 Page - Texas Instruments |
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78ST205SC Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 1 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 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR 78ST200 Series Standard Application C1 = Optional 1µF ceramic C2 = Required 100µF electrolytic Pin-Out Information Pin No. Function 1Vin 2 GND 3Vout Ordering Information 78ST2 C Output Voltage (For dimensions and PC board layout see Package Style 500.) XX Y 33 = 3.3 Volts 35 = 3.45 Volts 05 = 5.0 Volts Package Suffix V = Vertical Mount S = Surface Mount H = Horizontal Mount • High Efficiency > 82% • Wide Input Range • Self-Contained Inductor • Short-Circuit Protection • Over-Temperature Protection • Fast Transient Response The 78ST200 is a series of wide input voltage, 3 terminal Integrated Switching Regulators (ISRs). Employ- ing a ceramic substrate, these ISRs have a maximum output current of 2A. The output voltage is laser trimmed for high accuracy. The 78ST200 series regulators have internal short-circuit and over- temperature protection and may be used in a wide variety of applications. 78ST200 C2 + Vout GND GND Vin C1 1 2 3 Specifications Characteristics 78ST200 SERIES (T a = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Over Vin range 0.1* — 2.0 A Input Voltage Range Vin Io = 0.1 to 3.0A Vo < 3.5V 7 — 15 V Vo = 5.0V 8 — 20 V Output Voltage Tolerance ∆Vo Over Vin range, Io = 2.0A — ±1.0 ±2.0 %Vo Ta = 0°C to +60°C Line Regulation Regline Over Vin range — ±0.4 ±0.8 %Vo Load Regulation Regload 0.1 ≤ Io ≤ 2.0A — ±0.2 ±0.4 %Vo Ripple/Noise Vn Vin = Vin min, Io = 2.0A — 1 — %Vo Transient Response ttr 50% load change — 100 — µSec (with 100µF output cap) Vo over/undershoot 5.0 %Vo Efficiency η Vin = 9V, Io = 2.0A, Vo = 5V — 82 — % 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 — +85** °C Temperature Range Over Vin and Io ranges Thermal Resistance θ ja Free Air Convection, (40-60LFM) — 38 — °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 — — — 7 — Grams * ISR will operate down to no load with reduced specifications. ** See Thermal Derating chart. Note: The 78ST200 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications. Revised 6/30/98 |
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