sc473mltrt Semtech Corporation, sc473mltrt Datasheet
sc473mltrt
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sc473mltrt Summary of contents
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POWER MANAGEMENT Description The SC473 is a single-phase chip, high-performance PWM controller designed to power advanced graphic cores. On- chip support is provided that includes slew-rate controlled VID transitions. The SC473 implements hysteretic control technology which provides the fastest possible ...
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POWER MANAGEMENT Typical Application Circuit SC473 © 2006 Semtech Corp ...
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POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifi cations below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specifi the Electrical Characteristics section is not implied. Parameter Supply Voltage (V5) ...
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POWER MANAGEMENT Electrical Characteristics (Cont.) Parameter Logic Inputs (EN, VID [4:0]) Enable Threshold VID [4:0] Threshold Input Impedance Reference (DAC, SS, VREF), (0 < T DAC Error + Internal Offset DAC Sink/Source Ability SS Slew Current SS Discharge Threshold VREF ...
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POWER MANAGEMENT Electrical Characteristics (Cont.) Parameter Current Sensing (CS+, CS-) (Cont.) Low-Pass Filter Corner Frequency (1) Current Limit Combined System (CLSET) CL System Accuracy CLSET Input Bias Current Hysteresis Setting (HYS) HYS Input Bias Current HYS Gain (internal hysteresis setting ...
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POWER MANAGEMENT Electrical Characteristics (Cont.) Parameter High-Side Driver (TG, BST, DRN) Peak Current (1)(2) On-Resistance Rise Time (1, 2) Fall Time (1, 2) Propagation Delay (1, 2) Shoot-thru Protection Delay (1) Lower-Side Driver (BG, V5, PGND) Peak Current (1, 2) ...
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... SC473 Pin Out Diagram Top View Marking Information yyww = Date Code (Example: 0550) xxxxx = Semtech Lot Number (Example: E9000) xxxxx = (Example: 1–100) © 2006 Semtech Corp. Ordering Information Device SC473MLTRT 18 PWRGD SC473EVB RAMP Notes: 15 CS+ 1) Only available in tape and reel packaging. A reel contains 3000 ...
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POWER MANAGEMENT Pin Descriptions SC473 Pin Confi guration Pin # Pin Name 1 VID4 VID most signifi cant bit 2 VID3 3 VID2 4 VID1 5 VID0 VID least signifi cant bit Core comparator hysteresis - a resistor divider from ...
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POWER MANAGEMENT Block Diagram VID DAC [4:0] SS FB- - FB+ CS+ + CS- - CURRENT SENSE AMP CL_hi CLSET CL_lo HYS_hi HYS HYS_lo EN EN © 2006 Semtech Corp ERROR AMP - HYSTERETIC COMPARATOR + + - ...
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POWER MANAGEMENT Applications Information Introduction The SC473 is a new generation of hysteretic converters which combines the best features of Semtech’s hysteretic converter technology with the benefi error amplifi er. The SC473 provides a complete solution to ...
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POWER MANAGEMENT Applications Information (Cont.) Start-Up and Soft-Off Sequences: For the SC473 cold start-up, V5 must rise above its under- voltage lockout (UVLO) threshold (4.4V typ.) The EN signal may go high either before UVLO or after (preferred). The DAC ...
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POWER MANAGEMENT Applications Information (Cont.) DC Sense Voltage RCS LOAD RCS LOAD L1 L-R Rcs R25 R25 100 100 Power Monitor Implementation for SC473 (R Sense) IR33 VDCR (R25 R25 VR33 IR33 R33 PMON_Ideal V ...
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POWER MANAGEMENT Applications Information (Cont.) Component High Side MOSFET, HSFET Low Side MOSFET, LSFET Boost Capacitor, Cbst Boost Diode, Dbst Output Inductor, L Decoupling Capacitors Current Sense Resistor Output Bulk Capacitors Company Contact Web: http://www.irf.com/product-info/ International Rectifi er Phone: (310) ...
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POWER MANAGEMENT Applications Information (Cont.) EN VID4 ...
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POWER MANAGEMENT Typical Characteristics Nominal Load Regulation vs. Output Current V = 1.1500V Min-Max limits @ +/- 1% OUT 1.1800 1.1700 1.1600 1.1500 1.1400 1.1300 1.1200 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00 24.00 26.00 ...
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POWER MANAGEMENT Typical Characteristics Figure 7 – Nominal Operation @ Iout = 30A Figure 9 – Output Voltage with 24A load step *Above performance graphs correspond to Applications Schematic on page 2 © 2006 Semtech Corp. Figure 8 – Voltage ...
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POWER MANAGEMENT Outline Drawing - MLP-32 Outline Drawing - MLP 4x4-24 © 2006 Semtech Corp. 17 SC473 www.semtech.com ...
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... POWER MANAGEMENT Land Pattern - MLP-32 Land Pattern - MLP 4x4-24 Contact Information Phone: (805) 498-2111 Fax: (805) 498-3804 © 2006 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 18 SC473 www.semtech.com ...