SC198AMLTRT Semtech, SC198AMLTRT Datasheet
SC198AMLTRT
Specifications of SC198AMLTRT
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SC198AMLTRT Summary of contents
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NOT RECOMMENDED FOR NEW DESIGN POWER MANAGEMENT Features Input voltage range — 2.7V to 5.5V Dual buck converters with independent control High effi ciency — over 90% peak Up to 800mA Load Programmable output voltages per channel — 8 Fixed-frequency ...
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... JA Marking Information 198A yyww xxxxx xxxxx yyww = Date Code xxxx = Semtech Lot No. xxxx = Semtech Lot No. Ordering Information SC198AMLTRT SC198AEVB 16 Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. VINB 15 (2) Lead-free package only. Device is WEEE and RoHS compliant. LXB 14 GNDB ...
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NOT RECOMMENDED FOR NEW DESIGN Absolute Maximum Ratings V ( ...
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Electrical Characteristics (continued) Parameter Symbol N-Channel On Resistance R Start-Up Time t START Oscillator Frequency f SYNC Frequency (upper) f SYNCU f SYNC Frequency (lower) SYNCL Thermal Shutdown T Thermal Shutdown T Hysteresis UVLO Threshold V UVLO Hysteresis V UVLHYS ...
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NOT RECOMMENDED FOR NEW DESIGN Pin Descriptions Pin # Pin Name 1 VINA 2 LXA 3 GNDA 4 VOUTA 5 CTLA0 6 CTLA1 7 CTLA2 8 GNDR 9 CTLB2 10 CTLB1 11 CTLB0 12 VOUTB 13 GNDB 14 LXB 15 ...
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NOT RECOMMENDED FOR NEW DESIGN Block Diagram 17 SYNC 1 VINA Current Amp N Limit Amp 2 LXA VREF2 3 GNDA 20 ENA 4 VOUTA 5 CTLA0 Voltage VREF3 Select 6 CTLA1 7 CTLA2 18 VINR Oscillator and Slope Generator ...
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Typical Characteristics Effi ciency vs. Load at V 100 V = 1.8V PSAVE OUT 1.0V PSAVE OUT 1.8V PWM OUT 1.0 PWM OUT 0.001 ...
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NOT RECOMMENDED FOR NEW DESIGN Typical Characteristics (continued) V vs. V — 3.3V Programmed Output OUT 300mA OUT 800mA OUT 2.5 2 1.5 1 0.5 0 2.7 3.26 3.82 Input (V) Crosstalk ...
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NOT RECOMMENDED FOR NEW DESIGN Typical Characteristics (continued) Switching Waveforms — =3.6V, 25° 800mA IN OUT (2V/div) (10mV/div) Time (400ns/div) Switching Waveforms in PSAVE V =1.0V, V =3.6V, 25° 0mA OUT IN OUT (2V/div) ...
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NOT RECOMMENDED FOR NEW DESIGN Application Information Detailed Description The SC198A is a dual step-down, pulse-width modulated DC-DC converter with programmable output voltage and power-save mode. This device has a 1MHz internal oscil- lator that can be used during forced ...
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Application Information (continued) In PSAVE mode (see Figure 1), VOUT regulation is con- trolled by bursts in switching. While the output voltage is between the low and high voltage thresholds, switching is stopped to reduce loss. When the voltage drops ...
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Applications Information (continued) Inductor Selection The SC198A was designed for optimum performance when using a 4.7μH inductor. The magnitude of the inductor current ripple is dependent on the inductor value and is determined by the equation V V OUT OUT ...
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NOT RECOMMENDED FOR NEW DESIGN Applications Information (continued) PCB Layout Considerations Poor layout can degrade the performance of the DC-DC converter and can be a contributory factor in EMI prob- lems, ground bounce, thermal issues, and resistive voltage losses. Poor ...
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Outline Drawing – MLPQ-20 4x4 A 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 D ...
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... THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY’S MANUFACTURING GUIDELINES ARE MET Contact Information Semtech Corporation Power Mangement Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111 Fax: (805) 498-3804 www.semtech.com SC198A DIMENSIONS DIM ...