SC198MLTRT Semtech, SC198MLTRT Datasheet
SC198MLTRT
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SC198MLTRT Summary of contents
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... Portable gaming systems SC198 1 VINA LXA VINR VOUTA VINB GNDA ENA 5 CTLA0 6 CTLA1 7 CTLA2 LXB ENB VOUTB CTLB0 GNDB CTLB1 9 GNDR CTLB2 SYNC 1 Dual DC-DC Buck Converter with High Current Capability 4.7μH VOUTA 10μF 4.7μH VOUTB 14 12 10μ www.semtech.com SC198 ...
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... Load Regulation V LOADREG Minimum Duty Cycle DC LXA, LXB Current Limit I LIM Quiescent Current I Shutdown Current I SD LXA and LXB Leakage Current LXA © 2007 Semtech Corp. Symbol LXA I LXA ( 4.7μ 10μ -40°C to +85°C. Typical values are Conditions 10mA to 600mA OUT ...
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... UVLO Hysteresis V UVLHYS Logic Input High V (2) Logic Input Low V (2) Notes: (1) See Output Voltage Options table in the Application Information section. (2) For ENA, ENB, SYNC, CTLA0, CTLA1, CTLA2, CTLB0, CTLB1, CTLB2. © 2007 Semtech Corp. Conditions 100mA LXA LXB 100mA LXA LXB ...
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... Marking Information SC198 yyww xxxxx xxxxx yy = two digit year of manufacture ww = two digit week of manufacture xxxxx = lot number © 2007 Semtech Corp. Ordering Information SC198MLTRT 16 VINB 15 Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. LXB 14 (2) Available in lead-free package only. Device is WEEE and RoHS compliant ...
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... ENA T THERMAL PAD Note: (1) All CTL pins must be pulled high or low for proper operation. © 2007 Semtech Corp. Pin Function Input power supply voltage converter A Connection point for the inductor on converter A Ground reference to converter A Feedback control input for converter A Voltage select control pin 0 for output A (see Table A — Output Voltage Options). ...
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... Current Amp P Limit Amp N Limit Amp LXA VREF2 GNDA ENA VOUTA CTLA0 VREF3 Voltage Select CTLA1 CTLA2 VINR © 2007 Semtech Corp. Oscillator and Slope Generator Error Error Amp A Amp B VREF1 VREF1 PWM PWM Comp Comp Switching Control Logic Error Error ...
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... The internal compensation is designed to oper- ate with a single-pole output fi lter 4.7μH and C 10μF. © 2007 Semtech Corp. Programmable Output Voltage The SC198 has three control pins per output to allow the user to select a voltage level from eight predetermined output voltage levels (see Table A, Output Voltage Options below) ...
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... V to decrease until the PSAVE OUT exit threshold is reached. PSAVE levels are set high to minimize the undershoot when the SC198 exits PSAVE. © 2007 Semtech Corp. Protection Features The SC198 provides the following protection features: Thermal Shutdown Current Limit ...
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... V × ESR OUT(P-P) L COUT © 2007 Semtech Corp. Capacitors with X7R or X5R ceramic dielectric are strongly recommended for their low ESR and superior temperature and voltage characteristics. Y5V capacitors should not be used as their temperature coeffi cients make them unsuit- able for this application. Table C lists some manufactur- ers of recommended capacitor options ...
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... This inductor was used while obtaining data for the Typical Characteristics Section. Table C — Recommended Capacitors Manufacturer Part Number GRM21BR60J226ME39 Murata GRM188R60J106ME47 GRM188R60J475KE19 AVX 08056D107MAT2A © 2007 Semtech Corp. Rated Value μH DCR Ω Current A (1) 4.7 0.20 4.7 0.11 4.7 ...
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... Route the output voltage feedback path away from inductor and LX node to minimize noise and magnetic interference. 3. Use a ground plane to further reduce noise interference on sensitive circuit nodes. LXA GND VOUTA Note: Control pin routings are not shown. © 2007 Semtech Corp. VIN CinR CinA SC198 11 SC198 CinB LXB ...
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... Load (A) Line Regulation at 300mA 0.2 0. OUT 0.1 0. 1.8V OUT -0.05 -0.1 -0.15 -0.2 2.7 3.1 3.5 3.9 4.3 Input (V) © 2007 Semtech Corp. IN 100 V = 1.8V PSAVE OUT ENA=ENB=VIN 0 4.0 2.0 0 1.8V PSAVE OUT -2.0 -4.0 = 1.8V PWM -6.0 ENA=ENB=VIN -8.0 0.1 ...
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... Output Ripple for 1. OUT 20mV/div VIN 10mV/div VOUT 2.0V/div LX 400ns/div PSAVE @ 50mA Load 50mV/div VIN VOUT 50mV/div 2V/div LX 4μs/div © 2007 Semtech Corp. = 1.8V OUT 100 30mA PSAVE 30mA PWM 60 50 4.7 = 3.6V and IN = 50mA OUT 20mV/div 10mV/div 2.0V/div 50mV/div ...
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... Input Transient Step from 3.1V to 3.6V 500mV/div VIN 20mV/div VOUT 1ms/div Output Transient @ PWM 50mV/div VOUTA CTL0 1 and 2 2V/div 2ms/div © 2007 Semtech Corp. = 22μF OUT 200mV/div VIN 200mV/div VOUT 5.0V/div LX 200mA/div IOUT Input Transient Step from 3.6V to 3.1V VIN ...
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... NOT RECOMMENDED FOR NEW DESIGN POWER MANAGEMENT Outline Drawing - MLPQ- PIN 1 INDICATOR (LASER MARK) A aaa C E1 NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. © 2007 Semtech Corp DIM .100 .106 .110 2.55 2.70 2.80 aaa A2 bbb SEATING ...
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... NOT RECOMMENDED FOR NEW DESIGN POWER MANAGEMENT Land Pattern - MLPQ- ( NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Phone: (805) 498-2111 Fax: (805) 498-3804 © 2007 Semtech Corp. K DIM ...