SC4519H Semtech Corporation, SC4519H Datasheet
SC4519H
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SC4519H Summary of contents
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... POWER MANAGEMENT Description The SC4519H is a current mode switching regulator with an integrated switch, operating at 600kHz with separate sync and enable functions. The integrated switch allows for cost effective low power solutions (peak switch current 3 amps). The sync function allows customers to synchronize to a faster clock in order to avoid frequency beating in noise sensitive applications ...
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... SC4519H ° ° C ° C ° C ° ...
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... SC4519H µ ...
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... SC4519H µ A µ www.semtech.com ...
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... SC4519H ...
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... UVLO UVLO REFERENCE REFERENCE SOFT START SOFT START HICCUP HICCUP 0.7V 0.7V SLOPE SLOPE SLOPE COMP SLOPE COMP CLK CLK OSCILLATOR OSCILLATOR FREQUENCY FREQUENCY SC4519H OCP Limit vs Duty Cycle Duty Cycle (%) 6 SC4519H + + IN IN ISEN ISEN 40m 40m BST BST POWER POWER TRANSISTOR ...
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... SYNC pin activates synchronous mode. The frequency of the external clock can be from 700kHz to 1.2MHz. UVLO When the EN pin is pulled and held above 1.8V, the voltage on Pin IN determines the operation of the SC4519H increases during power up, the internal circuit senses IN V ...
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... The second one is the required capacitance, which should be high enough to hold up the output voltage. Before the SC4519H regulates the inductor current to a new value during a load transient, the output capacitor delivers all the additional current needed by the load. The ESR and ...
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... Its maximum repetitive reverse block voltage has to be higher than the input voltage of the SC4519H. A low forward conduction drop is also required to increase the overall efficiency. The freewheeling diode should be ...
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... V I diode F Loop Compensation Design The SC4519H has an internal error amplifier and requires a compensation network to connect between the COMP pin and GND pin as shown in Figure 3. The compensation network includes C4, C5 and R3. R1 and R2 are used to program the output voltage according to: ...
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... Connect the ground of the feedback divider and the C. compensation components directly to the GND pin of the SC4519H by using a separate ground trace. 8. Connect Pin large copper area to remove the IC heat and increase the power capability of the SC4519H. A few feedthrough holes are required to ...
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... SC4519H V V =5V = 10u 10u 10u www.semtech.com ...
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... POWER MANAGEMENT Application Information (Cont.) (COMPONENT - TOP) www.DataSheet4U.com (PCB - TOP) 2007 Semtech Corp. (COMPONENT - BOTTOM) (PCB - BOTTOM) 13 SC4519H 8 8 SC4518 www.semtech.com ...
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... 0° 8° 0° 8° aaa .004 0.10 bbb .010 0.25 ccc .008 0. GAGE PLANE 0. (L1) A DETAIL A -H- DIMENSIONS INCHES MILLIMETERS (.205) (5.20 .134 3.40 .201 5. .101 2.56 G .118 3.00 P .050 1.27 X .024 0.60 Y .087 2.20 Z .291 7.40 SC4519H www.semtech.com ...