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NCP1596 Datasheet(PDF) 4 Page - ON Semiconductor |
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NCP1596 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 12 page NCP1596, NCP1596A http://onsemi.com 4 PIN FUNCTION DESCRIPTIONS Pin # Symbol Pin Description NCP1596 1 FB Feedback pin. Part is internally compensated. Only necessary to place a voltage divider or connect the out- put directly to this pin. 2 GND Ground 3 LX Pin connected internally to power switch. Connect externally to inductor. 4 VCCP Power connection to the power switch. 5 VCC IC power connection. 6 NC No Connection NCP1596A 1 FB Feedback pin. Part is internally compensated. Only necessary to place a voltage divider or connect the out- put directly to this pin. 2 GND Ground 3 LX Pin connected internally to power switch. Connect externally to inductor. 4 VCCP Power connection to the power switch. 5 VCC IC power connection. 6 EN Device Enable pin. This pin has an internal current source pull up. No connect is enable the device. With this pin pulled down below 0.8 V, the device is disabled and enters the shutdown mode. Figure 2. Detail Block Diagram Oscillator L1 C2 R1 R2 Soft Start VCC VCCP NC/EN FB LX GND C1 D1 S R Ton(min) disable driver Thermal Shutdown UVLO 500 nA 0.8 V Isense Short protect Isense Q Q Vout = 0.8 V to 0.9 V * Vin Vin circuit EXTERNAL COMPONENT REFERENCE DATA Device VOUT Inductor Model Inductor (L1) Diode (D1) CIN (C1) COUT (C2) R1 R2 NCP1596/ NCP1596A 3.3 V CDC5D23 3R3 (1 A) CDRH6D38 3R3 (1.5 A) 3.3 mH MBRA210LT3G 22 mF 22 mF x 2 22 mF 22 mF x 2 31 k 10 k 2.5 V CDC5D23 3R3 (1 A) CDRH6D38 3R3 (1.5 A) 3.3 mH MBRA210LT3G 22 mF 22 mF x 2 22 mF 22 mF x 2 21 k 10 k 1.5 V CDC5D23 3R3 (1 A) CDRH6D38 3R3 (1.5 A) 3.3 mH MBRA210LT3G 22 mF 22 mF x 2 22 mF 22 mF x 2 8 k 10 k 1.2 V CDC5D23 3R3 (1 A) CDRH6D38 3R3 (1.5 A) 3.3 mH MBRA210LT3G 22 mF 22 mF x 2 22 mF 22 mF x 2 5 k 10 k |
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