sc186ultrt Semtech Corporation, sc186ultrt Datasheet
sc186ultrt
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sc186ultrt Summary of contents
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... The SC186 is available in a thermally-enhanced 0.6 (mm) MLPQ-UT16 package. LX PVIN R SC186 AVIN 1Ω VOUT AVIN C SS AVIN 0.1µF PGOOD CTL0 PGND CTL1 AGND CTL2 CTL3 © 2011 Semtech Corporation 4A Synchronous Step-Down Regulator L 1.0µH C OUT 47µ 10nF V OUT 1 ...
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... JA JC Marking Information 186 yyww xxxx yyww = Date Code XXXX = Semtech Lot number Ordering Information SC186ULTRT SC186EVB 13 Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. PGND 12 (2) Device is lead-free, Halogen free, and RoHS/WEEE compliant. PGND 11 VOUT ...
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Absolute Maximum Ratings PVIN and AVIN Supply Voltages ( -0.3 to +6 ...
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Electrical Characteristics (continued) Parameter Symbol Oscillator Frequency Soft-Start Charging Current (2) Foldback Holding Current I Impedence of PGOOD Low R PGOOD Threshold PGOOD Delay CTL Delay X CTL Input Current (2) X CTL Input High Threshold X CTL Input Low ...
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Pin Descriptions Pin # Pin Name Pin Function 1, 16 PVIN Input supply voltage for the converter power stage 2 AGND Ground connection for the internal circuitry — AGND needs to be connected to PGND directly. Power supply for the ...
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Block Diagram AVIN 3 Oscillator and Slope Generator 10 VOUT CTL0 4 Voltage Select CTL1 5 6 CTL2 7 CTL3 Current Amp Plimit Amp Control Logic PWM Comp Error Amp 500mV Ref PGOOD Detector AGND NOTES: A ...
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Typical Characteristics Circuit Conditions 22µF/6.3V 22µF/6.3V OUT Efficiency °C A 100 3.3V IN OUT 5V ...
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Typical Characteristics (continued) Circuit Conditions 22µF/6.3V 22µF/6.3V OUT Output Voltage Ripple ( 3.3V OUT V (50mV/div) OUT V (2V/div (2V/div) I (1A/div) SW ...
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Typical Characteristics (continued) Circuit Conditions 22µF/6.3V 22µF/6.3V OUT Output Voltage Ripple ( 5V 3.3V IN OUT OUT V (50mV/div) OUT V (2V/div ...
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Typical Characteristics (continued) Circuit Conditions 22µF/6.3V 22µF/6.3V OUT Start Up (CTL 3.3V IN OUT OUT V (5V/div) CTLx PGOOD (5V/div) V (2V/div) OUT ...
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Typical Characteristics (continued) Circuit Conditions 22µF/6.3V 22µF/6.3V OUT Output Short Circuit 1.5V IN OUT V (5V/div) CTLx PGOOD (5V/div) V (1V/div) OUT I (5V/div) OUT Time (20µs�div) ...
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Typical Characteristics (continued) Circuit Conditions 22µF/6.3V 22µF/6.3V OUT Transient Response ( 5V OUT VID Transition — No Load V = 5V; V ...
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Applications Information Detailed Description The SC186 is a synchronous step-down PWM (Pulse Width Modulated) DC-DC converter utilizing a 1.5MHz fixed-fre- quency voltage mode architecture. The device is designed to operate in fixed-frequency PWM mode and will enter PSAVE (power save) ...
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Applications Information (continued) load resistance. When the load presented falls below the current limit holding level, the output will charge to the upper PSAVE voltage threshold and return to normal operation. The SC186 is capable of sustaining an indefi- nite ...
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Applications Information (continued) Under-Voltage Lockout Under-Voltage Lockout (UVLO) is enabled when the input voltage drops below the UVLO threshold. This prevents the device from entering an ambiguous state in which regulation cannot be maintained. Hysteresis of approxi- mately 300mV is ...
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Applications Information (continued) PCB Layout Considerations The layout diagram in Figure 3 shows a recommended top-layer PCB for the SC186 and supporting components. Figure 4 shows the bottom layer for this PCB. Fundamental layout rules must be followed since the ...
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Outline Drawing – 3x3 MLPQ-UT16 PIN 1 INDICATOR (LASER MARK) A aaa C NOTES: Land Pattern – 3x3 MLPQ-UT16 (C) NOTES SEATING PLANE e/2 LxN E bxN ...
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... Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its officers, em- ployees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney fees which could arise. Contact Information Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111 Fax: (805) 498-3804 www ...