For assistance or to order, call (800) 531-5782 PT5120 Series • • • • • Low Voltage Input (7V) 85% Efficiency Internal Short-Circuit Protection Over-Temperature Protection Laser-Trimmed Output Voltage Pin-Out Information Standard Application Vin 1 PT5120 C1 Pin Function 1 Vin 2 GND Vout 3 C2 GND (Revised 6/4/98) The PT5120 series is a low voltage input (typically 7V) version of Power Trends’ easy-to-use, 1A positive stepdown, 3-terminal Integrated Switching Regulators (ISRs). These ISRs are designed with premium low-threshold FETs for those power regulation applications requiring very low input/output voltage differentials such as battery powered equipment. Ordering Information PT Series Suffix (PT1234X) PT5121! = + 5 Volts PT5123! = + 3.3 Volts Case/Pin Configuration N A C Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount Vout 3 2 SLTS080 1 AMP LOW VOLTAGE INPUT INTEGRATED SWITCHING REGULATOR Pkg Style 100 + GND PT5120 C1 = Optional 1µF ceramic C2 = Required 100µF electrolytic Specifications PT5120 SERIES Characteristics (Ta =25°C unless noted) Symbols Conditions Min Typ Max Output Current Io Over Vin range 0.1* — 1.0 A Short Circuit Current Isc Vin = Vin min — 3.5 — Apk Input Voltage Range Vin 0.1 ≤ Io ≤ 1.0 A 7 7 — 26 38 V V Output Voltage Tolerance ∆Vo Over Vin Range, Io = 1.0 A Ta = 0°C to +60°C — ±1.5 ±3.0 %Vo Line Regulation Regline Over Vin range — ±0.5 ±1.0 %Vo Load Regulation Regload 0.1 ≤ Io ≤ 1.0 A — ±0.5 ±1.0 %Vo Vo Ripple/Noise Vn Vin=Vin min, Io=1.0 A — ±2 — %Vo Transient Response with Co = 100µF ttr Vos 25% load change Vo over/undershoot — — 100 5.0 200 — µSec %Vo Efficiency η Vin=9V, Io=0.5A, Vo=3.3V Vin=9V, Io=0.5A, Vo=5V — — 82 85 — — % % Switching Frequency ƒo Over Vin and Io ranges, Vo= 3.3V Vo = >5V 575 500 725 650 875 800 kHz Absolute Maximum Operating Temperature Range Ta -20 — +85 °C Recommended Operating Temperature Range Ta Free Air Convection, (40-60LFM) Vo= 3.3V Vo= 5V -20 -20 — — +80** +80** °C Thermal Resistance θja Free Air Convection (40-60LFM) Vo = 3.3V Vo = 5V — — 45 50 — — °C/W Storage Temperature Ts Vo = 3.3V Vo = 5V Units -40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 1 msec, Half Sine, mounted to a fixture — 500 — G’s Mechanical Vibration Per Mil-STD-883D, Method 2007.2 20-2000 Hz, Soldered in a PC board — 5 — G’s — 4.5 — grams Weight * ISR will operate down to no load with reduced specifications. **See Thermal Derating chart. Note: The PT5120 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications. 2 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.ti.com/powertrends (800) 531-5782 For assistance or to order, call PT5120 CHARACTERISTIC PT5123, 3.3 VDC Series DATA PT5121, 5.0 VDC (See Note 1) Efficiency vs Output Current (See Note 1) Efficiency vs Output Current 90 100 85 80 Efficiency - % Efficiency - % 90 80 Vin 70 9.0V 12.0V 18.0V 60 24.0V Vin 75 9.0V 12.0V 18.0V 24.0V 30.0V 38.0V 70 65 60 55 50 26.0V 50 45 40 40 0 0 0.2 0.4 0.6 0.8 0.2 0.4 0.6 0.8 1 1 Iout-(Amps) Iout-(Amps) Ripple vs Output Current Ripple vs Output Current 60 120 50 100 40 80 30 Vin 26.0V 24.0V 18.0V 12.0V 9.0V 20 10 Ripple-(mV) Ripple-(mV) Vin 38.0V 30.0V 24.0V 18.0V 60 1 2 .0 V 9.0V 40 20 0 0 0 0 0.2 0.4 0.6 0.8 0.2 0.4 Iout-(Amps) Thermal Derating (Ta) 0.6 0.8 1 1 Iout-(Amps) Thermal Derating (Ta) (See Note 2) 1 (See Note 2) 1 70°C 50°C 0.8 Iout-(Amps) Iout-(Amps) 0.8 85°C 0.6 0.4 0.2 60°C 70°C 0.6 85°C 0.4 0.2 0 0 7 9 11 13 15 17 19 21 23 25 27 7 11 15 19 Vin-(Volts) 23 27 31 35 39 Vin-(Volts) Power Dissipation vs Output Current Power Dissipation vs Output Current 1.2 1.8 1.6 1 1.4 0.8 26.0V 24.0V 18.0V 0.6 12.0V 9.0V 0.4 Vin PD-(Watts) PD-(Watts) Vin 1.2 38.0V 30.0V 24.0V 18.0V 12.0V 9.0V 1 0.8 0.6 0.4 0.2 0.2 0 0 0 0.2 0.4 0.6 0.8 1 Iout-(Amps) 0 0.2 0.4 0.6 0.8 1 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.ti.com/powertrends 3 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 acknowledgment, 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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