PT78NR200 Series 10-12W Plus to Minus Voltage Integrated Switching Regulator SLTS074A (Revised 6/30/2000) • • • • • • Negative output from positive input Wide Input Range Self-Contained Inductor Short Circuit Protection Over-Temperature Protection Fast Transient Response The PT78NR200 series creates negative output voltage from a posi- Pin-Out Information Standard Application Vin 1 PT78NR200 + C1 3 Function 1 +Vin 2 -Vout 3 GND + COM Ordering Information PT78NR2 XX -Vout 2 C2 Pin tive input voltage greater than 9V. These easy-to-use, 3-terminal, Integrated Switching Regulators (ISRs) have maximum output power of 10 to 12 watts and a negative output voltage that is laser trimmed. They also have excellent line and load regulation. The PT78NR200 requires 100 LFM of airflow at its maximum output current. COM Y Output Voltage Package Suffix 52 = -5.2 Volts 06 = -6.0 Volts 12 = -12.0 Volts 15 = -15.0 Volts H = Horizontal Mount S = Surface Mount V = Vertical Mount (For dimensions and PC board layout, see Package Styles 600 and 610.) C1 = Required 100µF electrolytic C2 = Required 100µF electrolytic Pkg Style 600 Specifications PT78NR200 SERIES Characteristics (Ta= 25°C unless noted) Symbols Conditions Output Current Io Over Vin range Short Circuit Current Isc Inrush Current Iir tir Input Voltage Range Vin 0.1 ≤ Io ≤ Imax 9 — 15 V Output Voltage Tolerance ∆Vo Over Vin range Ta= 0°C to +70°C — ±1.0 ±3.0 %Vo Line Regulation Regline Over Vin range — ±0.5 ±1.0 %Vo Load Regulation Regload 0.3 ≤ Io ≤ Imax — ±0.5 ±1.0 %Vo Vo Ripple/Noise Vn Vin=10V, Io=Imax — ±2 — %Vo Transient Response (with 100µF output cap) ttr 50% load change Vo over/undershoot — — 100 5.0 250 — µSec %Vo Efficiency η Vin=9V, Io=0.5×Imax, Vo=-12V — 78 — % Switching Frequency ƒo Over Vin and Io ranges 600 650 700 kHz Absolute Maximum Operating Temperaturte Range Ta 100 LFM airflow Over Vin and Io Ranges 0 — +85 °C Recommended Operating Temperature Range Ta 100 LFM airflow Over Vin and Io Ranges 0 — +60** °C Thermal Resistance θja 100 LFM airflow — 35 — °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 — 10 — Weight — — — 11 Min Typ Max Units Vin=10V 0.1* 0.1* — — — 4×Imax 2.0 1.0 — A A Apk Vin=10V On start-up — — 4 0.5 — — A mSec Vo= -5.2V Vo= -12.0V *ISR will operate down to no load with reduced specifications. **See Thermal Derating chart. Note: The PT78NR200 series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications. For technical support and more information, see inside back cover or visit www.ti.com/powertrends G’s Grams IMPORTANT NOTICE 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 2000, Te xas Instrume nts Incorporate d