NCV8843 1.5 A, 340 kHz, Buck Regulator with Synchronization Capability The NCV8843 is a 1.5 A buck regulator IC operating at a 2 fixedfrequency of 340 kHz. The device uses the V control NCV8843 R6 100k D1 L1 C1 U1 18 H 0.1 F Vout (3.3 V) Vsw Vin Vin (7 V to 16 V) SHDNB BOOST NC NC NC NC C5 NC NC R3 D2 0.1 F NC NC 162 SYNC Vc + C2 C3 + GND Vfb NCV8843 330 F 100 F C4 R2 0.1 F 100 SHDNB SYNC Figure 1. Application Diagram, 7.0 V 16 V to 3.3 V 1.0 A Converter MAXIMUM RATINGS* Rating Value Unit Peak Transient Voltage (31 V Load Dump V = 14 V) 45 V IN Operating Junction Temperature Range, T 40 to 150 C J Lead Temperature Soldering: Reflow: (Note 1) 260 peak C (Note 2) Storage Temperature Range, T 65 to +150 C S ESD (Human Body Model) 2.0 kV (Machine Model) 200 V (Charge Device Model) >1.0 kV Package Thermal Resistance SO16W EPAD JunctiontoCase, R 16 C/W JC 35 C/W SO16W EPAD JunctiontoAmbient, R (Note 3) JA 38 C/W DFN18 JunctiontoAmbient, R (Note 3) JA 100 C/W SO8 JunctiontoAmbient, R (Note 4) JA Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. *The maximum package power dissipation must be observed. 1. 60 second maximum above 183C. 2. 5C/0C allowable conditions. 3. 4 layer board, 1 oz copper outer layers, 0.5 oz copper inner layers, 600 sq mm copper area. 2 4. 1 in , 1 oz copper area used for heatsinking. MAXIMUM RATINGS (Voltages are with respect to GND) Pin Name V V I I Max MIN SOURCE SINK V (DC)* 40 V 0.3 V N/A 4.0 A IN BOOST 40 V 0.3 V N/A 100 mA V 40 V 0.6 V/1.0 V, t < 50 ns 4.0 A 10 mA SW V 7.0 V 0.3 V 1.0 mA 1.0 mA C SHDNB 7.0 V 0.3 V 1.0 mA 1.0 mA SYNC 7.0 V 0.3 V 1.0 mA 1.0 mA V 7.0 V 0.3 V 1.0 mA 1.0 mA FB *See table above for load dump.