(800) 531-5782 For assistance or to order, call 78ST200 Series 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR • • • • • • High Efficiency > 82% Wide Input Range Self-Contained Inductor Short-Circuit Protection Over-Temperature Protection Fast Transient Response Pin-Out Information The 78ST200 is a series of wide input voltage, 3 terminal Integrated Switching Regulators (ISRs). Employing 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 overtemperature protection and may be used in a wide variety of applications. Ordering Information 78ST2 XX Pin No. Function Standard Application Vin 1 78ST200 C1 2 C2 GND Y C 1 Vin 2 GND Output Voltage Package Suffix 3 Vout 33 = 3.3 Volts 35 = 3.45 Volts 05 = 5.0 Volts V = Vertical Mount S = Surface Mount H = Horizontal Mount Vout 3 Revised 6/30/98 + GND (For dimensions and PC board layout see Package Style 500.) C1 = Optional 1µF ceramic C2 = Required 100µF electrolytic Specifications 78ST200 SERIES Characteristics (Ta = 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 7 8 — — 15 20 V V Output Voltage Tolerance ∆V o — ±1.0 ±2.0 %Vo %Vo Vo < 3.5V Vo = 5.0V Over Vin range, Io = 2.0A Ta = 0°C to +60°C Line Regulation Regline Over Vin range — ±0.4 ±0.8 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 (with 100µF output cap) ttr 50% load change Vo over/undershoot — 100 5.0 — µSec %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 Operating Temperature Range Ta — -40 — +85 °C Recommended Operating Temperature Range Ta Free Air Convection, (40-60LFM) Over Vin and Io ranges -40 — Thermal Resistance θja 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, 20-2000 Hz, soldered in a PC board — 5 — G’s Weight — — — 7 — Grams +85** * 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. Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com °C For assistance or to order, call (800) 531-5782 78ST200 CHARACTERISTIC DATA 78ST233_ 3.3 VDC 78ST205_ 5.0 VDC (See Note 1) (See Note 1) Efficiency vs Output Current Efficiency vs Output Current 100 100 90 Vin 80 7.0V 8.0V 10.0V 70 12.0V 15.0V 60 Efficiency (%) Efficiency (%) 90 50 Vin 80 7.5V 9.0V 70 12.0V 15.0V 20.0V 60 50 40 40 0.0 0.5 1.0 1.5 0.0 2.0 0.5 1.0 Iout (A) 1.5 2.0 Iout (A) Ripple vs Output Current Ripple vs Output Current 30 30 25 25 Vin 20 7.0V 8.0V 10.0V 12.0V 15.0V 15 10 Ripple (mV) Ripple (mV) Series 5 Vin 20 7.5V 9.0V 12.0V 15.0V 20.0V 15 10 5 0 0 0.0 0.5 1.0 1.5 0.0 2.0 0.5 1.0 Iout (A) Thermal Derating (Ta) 1.5 2.0 Iout (A) Thermal Derating (Ta) (See Note 2) (See Note 2) 2.0 2.0 70°C No Derating @ 85°C 85°C 1.5 Iout (A) Iout (A) 1.5 1.0 0.5 1.0 0.5 0.0 0.0 7 9 11 13 15 8 10 12 Vin (Volts) 16 18 20 Vin (Volts) Power Dissipation vs Output Current Power Dissipation vs Output Current 2.0 2.0 1.5 1.5 Vin 7.0V 8.0V 10.0V 12.0V 15.0V 1.0 Vin PD Watts) PD (Watts) 14 7.5V 9.0V 12.0V 1.0 15.0V 20.0V 0.5 0.5 0.0 0.0 0.0 0.5 1.0 Iout (A) 1.5 2.0 0.0 0.5 1.0 1.5 2.0 Iout (A) 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 Note) Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 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. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. 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