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| PT79SR100 Series -1.5 Amp Negative Step-Down Integrated Switching Regulator SLTS061A (Revised 6/30/2000) * * * * High Efficiency > 85% Self-Contained Inductor Short Circuit Protection Over-T emperature Protection The PT79SR100 is a line of Negative Input/Negative Output 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 voltages. They have excellent line and load regulation, and are ideal for applications, such as RS232 and Ethernet communications, ECL logic, and op-amp circuitry. Pin-Out Information Pin 1 Ordering Information Function GND -Vin -Vout PT79SR1 Output Voltage 05 = -5.0 Volts 52 = -5.2 Volts 06 = -6.0 Volts 08 = -8.0 Volts 09 = -9.0 Volts 12 = -12.0 Volts 15 = -15.0 Volts XX Y Package Suffix V = Vertical Mount S = Surface Mount H = Horizontal Mount Standard Application COM COM 2 3 C1 -Vin 2 1 D1 3 C2 -Vout PT79SR1 C1 = Optional ceramic (1F) C2 = Optional ceramic (1-5F) D1 = Zener diode required to clamp turn-on overshoot (See Application Note) Specifications Characteristics (Ta = 25C unless noted) Output Current Short Circuit Current Input Voltage Range Output Voltage Tolerance Line Regulation Load Regulation Vo Ripple/Noise Transient Response Efficiency Switching Frequency Absolute Maximum Operating T emperature Range Recommended Operating Temperature Range Thermal Resistance Temperature Coefficient Storage Temperature Mechanical Shock Mechanical Vibration Weight Symbols Io Isc Vin Vo Regline Regload Vn ttr Pkg Style 500 PT79SR100 SERIES Conditions Over Vin range Vin=Vo-4V Io=-0.1 to -1.5 A -0.1 Io -1.5 A Vo=-5V Vo=-15V Min -0.1* -- -9 -19 -- -- -- -- -- -- -- 0.95 -40 Free Air Convection, (40-60LFM) Over Vin and Io ranges Free Air Convection, (40-60LFM) Over Vin and Io ranges -- Per Mil-STD-883D, Method 2002.3 Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, soldered in a PC board -- ** See Thermal Derating chart. Typ -- -3.5 -- -- 1.0 1.0 0.5 35 100 30 85 1.0 -- -- 45 0.5 -- 500 5 7.0 Max -1.5 -- -30 -30 3.0 2.0 1.0 -- -- -- -- 1.05 +85 +60** -- 1.5 +125 -- -- -- Units A Apk V V %Vo %Vo %Vo mVpp Sec %Vo % MHz C C C/W mV/C C G's G's Grams Over Vin range, Io=-1.5 A Ta=-20C to shutdown Over Vin range -0.1 Io -1.5 A Vin=-15V, Io=-1.0 A,Vo=-5V 50% load change Vo=overshoot/undershoot Vin=-10V, Io=-1.0A, Vo=-5V Over Vin and Io ranges o Ta Ta -40 -- -- -40 -- -- -- ja Tc Ts -- -- -- * ISR will operate down to no load with reduced specifications. For technical support and more information, see inside back cover or visit www.ti.com/powertrends PT79SR100 Series -1.5 Amp Negative Step-Down Integrated Switching Regulator Typical Characteristics PT79SR105, -5.0 VDC (See Note 1) PT79SR112, -12.0 VDC (See Note 1) PT79SR115, -15.0 VDC (See Note 1) Efficiency vs Output Current 100 100 Vin 9V 10.0V 15.0V 20.0V 25.0V 30.0V 90 80 70 60 50 50 40 0 0.25 0.5 0.75 1 1.25 1.5 40 Efficiency vs Output Current 100 Vin 16.0V 20.0V 70 60 25.0V 30.0V Efficiency vs Output Current Efficiency - % Efficiency - % Efficiency - % 90 80 90 80 70 60 50 40 Vin 19.0V 21.0V 24.0V 27.0V 30.0V 0 0.25 0.5 0.75 1 1.25 1.5 0 0.25 0.5 0.75 1 1.25 1.5 Iout-(Amps) Iout-(Amps) Iout-(Amps) Ripple vs Output Current 60 100 Ripple vs Output Current 150 Ripple vs Output Current Ripple-(mV) Ripple-(mV) 40 30 20 10 0 0 0.25 0.5 0.75 1 1.25 1.5 Vin 30.0V 25.0V 20.0V 15.0V 10.0V 9V Ripple-(mV) 50 Vin 120 30.0V 90 60 30 0 27.0V 24.0V 21.0V 19.0V 80 60 40 20 0 0 0.25 0.5 0.75 1 1.25 1.5 Vin 30.0V 25.0V 20.0V 16.0V 0 0.25 0.5 0.75 1 1.25 1.5 Iout-(Amps) Iout-(Amps) Iout-(Amps) Thermal Derating (Ta) 1.6 1.4 (See Note 2) 50C 60C 1.6 1.4 Thermal Derating (Ta) (See Note 2) 50C 60C 70C Thermal Derating (Ta) 1.6 1.4 (See Note 2) 50C 60C 70C Iout-(Amps) Iout-(Amps) 1 0.8 0.6 0.4 0.2 0 7 85C 1 0.8 0.6 0.4 0.2 0 85C Iout-(Amps) 1.2 70C 1.2 1.2 1 0.8 0.6 0.4 0.2 0 85C 9 11 13 15 17 19 21 23 25 27 29 31 15 17 19 21 23 25 27 29 31 18 20 22 24 26 28 30 Vin-(Volts) Vin-(Volts) Vin-(Volts) Power Dissipation vs Output Current 2 Vin 1.5 30.0V 25.0V 20.0V 15.0V 10.0V 9V 2 2.5 Power Dissipation vs Output Current Power Dissipation vs Output Current 2.5 PD-(Watts) PD-(Watts) PD-(Watts) Vin 30.0V 25.0V 20.0V 16.0V 2 1.5 1 0.5 0 Vin 30.0V 27.0V 24.0V 21.0V 19.0V 1.5 1 0.5 0 1 0.5 0 0 0.25 0.5 0.75 1 1.25 1.5 0 0.25 0.5 0.75 1 1.25 1.5 0 0.25 0.5 0.75 1 1.25 1.5 Iout-(Amps) Iout-(Amps) Iout-(Amps) Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25C. 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 soldered in a printed circuit board. (See Thermal Application Notes.) For technical support and more information, see inside back cover or visit www.ti.com/powertrends I MPORTANT NOTI CE Te xas Instrume nts and its subsidiarie s (TI) re se rve the right to make change s to the ir products or to discontinue any product or se rvice without notice , and advise custome rs to obtain the late st ve rsion of re le vant information to ve rify, be fore placing orde rs, that information be ing re lie d on is curre nt and comple te . All products are sold subje ct to the te rms and conditions of sale supplie d at the time of orde r acknowle dgme nt, including those pe rtaining to warranty, pate nt infringe me nt, and limitation of liability. TI warrants pe rformance of its se miconductor products to the spe cifications applicable at the time of sale in accordance with TI's standard warranty. Te sting and othe r quality control te chnique s are utilize d to the e xte nt TI de e ms ne ce ssary to support this warranty. Spe cific te sting of all parame te rs of e ach de vice is not ne ce ssarily pe rforme d, e xce pt those mandate d by gove rnme nt re quire me nts. Custome rs are re sponsible for the ir applications using TI compone nts. In orde r to minimize risks associate d with the custome r's applications, ade quate de sign and ope rating safe guards must be provide d by the custome r to minimize inhe re nt or proce dural hazards. TI assume s no liability for applications assistance or custome r product de sign. TI doe s not warrant or re pre se nt that any lice nse , e ithe r e xpre ss or implie d, is grante d unde r any pate nt right, copyright, mask work right, or othe r inte lle ctual prope rty right of TI cove ring or re lating to any combination, machine , or proce ss in which such se miconductor products or se rvice s might be or are use d. TI's publication of information re garding any third party's products or se rvice s doe s not constitute TI's approval, warranty or e ndorse me nt the re of. Copyright (c) 2000, Te xas Instrume nts Incorporate d |
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