SC4519 Semtech Corporation, SC4519 Datasheet
SC4519
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SC4519 Summary of contents
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... POWER MANAGEMENT Description The SC4519 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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... SC4519 ° ° C ° C ° C ° ...
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... ° < ° ° < ° SC4519 µ µ µ µ ...
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... SC4519 µ µ www.semtech.com ...
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... SC4519 ...
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... UVLO UVLO REFERENCE REFERENCE SOFT START SOFT START HICCUP HICCUP 0.7V 0.7V SLOPE SLOPE SLOPE COMP SLOPE COMP OSCILLATOR OSCILLATOR CLK CLK FREQUENCY FREQUENCY 6 SC4519 + + IN IN ISEN ISEN 40m 40m BST BST POWER POWER TRANSISTOR TRANSISTOR GND GND ...
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... Pulling and holding the EN pin below 0.4V activates the shut down mode of the SC4519 which reduces the input supply current to less than 10µA. During the shut down mode, the switch is turned off. The SC4519 is turned on if the EN pin is pulled high. 2007 Semtech Corp. ...
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... Resistance) which should be low enough to reduce the output voltage deviation during load changes. The second one is the required capacitance, which should be high enough to hold up the output voltage. Before the SC4519 regulates the inductor current to a new value during a load transient, the output capacitor delivers all the additional current needed by the load ...
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... Its maximum repetitive reverse block voltage has to be higher than the input voltage of the SC4519. A low forward conduction drop is also required to increase the overall efficiency. The freewheeling diode should be turned on and off fast with minimum reverse recovery because the SC4519 is designed for high frequency applications ...
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... P V diode F Loop Compensation Design The SC4519 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 compensation components directly to the GND pin of the SC4519 by using a separate ground trace Connect Pin large copper area to remove the IC heat and increase the power capability of the SC4519. A few feedthrough holes are required to ...
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... SC4519 V = 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 SC4519 8 8 SC4518 www.semtech.com ...
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... BSC 6.00 BSC e .050 BSC 1.27 BSC F .116 .120 .130 2.95 3.05 3.30 H .085 .095 .099 2.15 2.41 2. .010 .020 0.25 0.50 L .016 .028 .041 0.40 0.72 1.04 (.041) (1.05 0° 8° 0° 8° aaa .004 0.10 bbb .010 0.25 ccc .008 0. GAGE PLANE 0. (L1) A DETAIL A -H- SC4519 www.semtech.com ...
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... FAILURE MAY COMPROMISE THE THERMAL AND/OR FUNCTIONAL PERFORMANCE OF THE DEVICE. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 15 DIMENSIONS DIM INCHES MILLIMETERS (.205) (5.20 .134 3.40 E .201 5.10 F .101 2.56 G .118 3.00 P .050 1.27 X .024 0.60 Y .087 2.20 Z .291 7.40 SC4519 www.semtech.com ...