sc190bevb Semtech Corporation, sc190bevb Datasheet
sc190bevb
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sc190bevb Summary of contents
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POWER MANAGEMENT Description The SC190 is a synchronous step-down converter with integrated power devices and an integrated front-end LDO to minimize input supply ripple. Output voltage is programmable using two control bits, eliminating the need for feedback resistors tied to ...
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POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Parameter VIN Input Logic Inputs (SYNC/PWM, ...
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POWER MANAGEMENT Electrical Characteristics (Cont.) Unless otherwise noted 3.6V, SYNC/PWM = V IN Use of standard ESD handling precautions is required. Parameter Symbol V VOUT Accuracy Back-end LDO VOUT Load Regulation (BELDO) Back-end LDO Line VOUT Regulation (BELDO) ...
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POWER MANAGEMENT Electrical Characteristics (Cont.) Unless otherwise noted 3.6V, SYNC/PWM = V IN Use of standard ESD handling precautions is required. Parameter Symbol UVLO Threshold (lower) UVLO Hysteresis V Thermal Shutdown Thermal Shutdown Hysteresis Logic Input High Logic ...
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... SC190BIMLTRT LX 10 SC190CIMLTRT GND 9 SC190DIMLTRT SC190AEVB VID1 8 SC190BEVB VID0 7 SC190CEVB SC190DEVB SYNC/PWM 6 (1) Lead-free packaging only. This product is fully WEEE and RoHS compliant. Available on tape and reel only. A reel contains 3000 devices. (2) Part specific evaluation boards - consult factory for availability. ...
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POWER MANAGEMENT Block Diagram SYNC/ PWM OSC and Slope 6 Generator MODE Handover 5 Timing 500 mV reference LDO Error Amp Back-End VOUT LDO 3 VID0 Voltage 7 Select VID1 2005 Semtech Corp. REF LDO Error ...
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POWER MANAGEMENT Applications Information SC190 Detailed Description The SC190 is a step-down, pulse-width-modulated (PWM) DC-DC converter with a low dropout (LDO) pre-regulator and a low current LDO regulator for operation in low power modes. The device has an internal synchronous ...
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POWER MANAGEMENT Applications Information The output load in switcher mode has to be reduced to a load that the LDO regulator can support before switching between the two modes to minimize output voltage deviation. The transition from LDO regulator mode ...
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POWER MANAGEMENT Applications Information (Cont.) Output Filter The SC190 series of synchronous step-down converters have internal loop compensation. compensation is designed to work with a certain output filter corner frequency defined by the equation π 2 ...
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POWER MANAGEMENT Applications Information (Cont.) PCB Layout Considerations Poor layout can degrade the performance of the DC- DC converter and can be a contributory factor in EMI problems, ground bounce and resistive voltage losses. Poor regulation and instability can result. ...
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POWER MANAGEMENT Applications Information (Cont.) CIN Selection The source input current to the SC190 buck converter supply current with a triangular ripple riding on it. To prevent large input voltage ripple a low ESR ceramic capacitor is ...
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POWER MANAGEMENT Typical Characteristics NOTE: Conditions 10µH, Cout = 10µF Input Voltage Ripple (FELDO bypassed) Handover Transition Linear to Switcher Mode 2005 Semtech Corp. Input Voltage Ripple (FELDO active) V (AC Handover Transition ...
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POWER MANAGEMENT Typical Characteristics (Cont.) SC190C Line Regulation (FELDO Bypassed) 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.7 3.1 3.5 3.9 4.3 INPUT VOLTAGE (V) Efficiency vs Load Current (FELDO Active OUT 100 ...
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POWER MANAGEMENT Typical Characteristics (Cont.) Quiescent Current vs Temperature -40 - TEMPERATURE (°C) Input Current vs Output Current 1000 100 10 1 0.1 0.01 0.01 0 ...
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POWER MANAGEMENT Evaluation Board Schematic TP1 VIN VIN 10uF TP2 EN TP3 MODE TP4 SYNC/PWM TP5 VID0 TP6 VID1 2005 Semtech Corp VIN ...
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POWER MANAGEMENT Evaluation Board Gerber Plots Top Copper Top Silkscreen 2005 Semtech Corp. Bottom Copper Bottom Silkscreen 16 SC190 www.semtech.com ...
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POWER MANAGEMENT Outline Drawing - MLP-10 3x3 A PIN 1 INDICATOR (LASER MARK) aaa C LxN NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS TERMINALS. Marking Information 190n ...
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... COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Phone: (805) 498-2111 FAX (805)498-3804 2005 Semtech Corp. K DIM INCHES Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 18 DIMENSIONS MILLIMETERS (.112) (2.85) .075 1.90 .055 1.40 .087 2.20 .020 0.50 .012 0.30 .037 0.95 ...