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LTM8045 Datasheet(PDF) 22 Page - Analog Devices |
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LTM8045 Datasheet(HTML) 22 Page - Analog Devices |
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22 / 54 page  LTM4655 22 Rev. 0 For more information www.analog.com TEST CIRCUIT Test Circuit 1. Positive-VOUT Configuration, Regulating VOUTn+, One Channel Shown Test Circuit 2. Negative-VOUT– Configuration, Regulating VOUTn–, One Channel Shown VINn SVINFn SVINn RUN n GND CLKIN n VOUTn+ VOSNSn+ VOUTn– PGOOD n EXTVCCn IMON na IMON nb ISET nb ISET na PGDFB n 24VOUT, UP TO 4A COUTLn 68µF COUTHn 27µF SVOUTn– RPGDFBn 196k RISETn 480k RfSETn 57.6k RTHn 499Ω CDn 4.7 F x2 CINHn 4.7 F CTHn 0.1 F VDn INTVCCn VINREG n 4655 TC01 NC SW LTM4655 COMP na COMP nb fSETn VIN 29V TO 40V + LOAD n RUN n RUN – GND: >1.2VTYP = ON <1.07VTYP = OFF PINS NOT SHOWN AND NOT TESTED IN THIS TEST CIRCUIT: LDOIN, LDOOUT, CLKOUTn, CLKSET, MOD, TEMP+, TEMP– ISET na ISETnb VINn SVINFn SVINn RUN n GND CLKIN n VDn INTVCCn VINREG n COMP na COMP nb fSETn PGOOD n PGDFB n SVOUTn– VOUTn+ VOUTn– SVOUT– EXTVCCn LTM4655 VOUT– –24V UP TO 1.25A AT VIN = 12V COUTH 27µF LOAD COUTL* 68µF RPGDFB 196k RfSETn 57.6k RISETn 480k CDn 4.7 F 2x CINHn 4.7 F VIN 3.6V TO 16V 4655 TC02 + CTHn 0.1 F RTHn 499Ω CEXTVCCn 1 F SW NC REXTVCCn** 0Ω *Polarized output capacitors COUTL, if used, must be rated to withstand ~0.3V typical reverse polarity prior to LTM4655 start-up, stemming from a weakly forward-biased body diode. In such cases, a Schottky diode should be connected between PGND and VOUT– to limit the voltage. See the Applications Information section and Figures 49a and 49b. **Outside the ATE Test environment, REXTVCC, if used, should not be 0Ω. See the Applications Information section. RUN n RUN – GND: >1.2VTYP = ON <1.07VTYP = OFF PINS NOT SHOWN AND NOT TESTED IN THIS TEST CIRCUIT: LDOIN, LDOOUT, CLKOUTn, CLKSET, MOD, TEMP+, TEMP– IMON na IMON nb |
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