NCP3020A, NCP3020B, NCV3020A, NCV3020B Synchronous Buck Controller, 28 V The NCP3020 is a PWM device designed to operate from a wide input range and is capable of producing an output voltage as low as www.onsemi.com 0.6 V. The NCP3020 provides integrated gate drivers and an internally set 300 kHz (NCP3020A) or 600 kHz (NCP3020B) oscillator. The 8 NCP3020 also has an externally compensated transconductance error 1 amplifier with an internally fixed softstart. Protection features include lossless current limit and short circuit protection, output SOIC8 NB overvoltage protection, output undervoltage protection, and input CASE 751 undervoltage lockout. The NCP3020 is currently available in a SOIC 8 package. MARKING DIAGRAM Features 8 3020x Input Voltage Range from 4.7 V to 28 V ALYW 300 kHz Operation (NCP3020B 600 kHz) 1 0.6 V Internal Reference Voltage 3020x = Specific Device Code Internally Programmed 6.8 ms SoftStart (NCP3020B 4.4 ms) x = A or B Current Limit and Short Circuit Protection A = Assembly Location L = Wafer Lot Transconductance Amplifier with External Compensation Y = Year Input Undervoltage Lockout W = Work Week Output Overvoltage and Undervoltage Detection = PbFree Package NCV Prefix for Automotive and Other Applications Requiring Site and Change Controls PIN CONNECTIONS This is a PbFree Device BST V CC COMP HSDR V IN FB VSW C IN GND LSDR C BST VCC BST ORDERING INFORMATION Q1 HSDR Device Package Shipping L 0 Vout NCP3020ADR2G SOIC8 2500 / Tape & Reel COMP VSW (PbFree) R FB1 NCP3020BDR2G SOIC8 2500 / Tape & Reel C R Q2 C1 C FB LSDR (PbFree) C 0 C GND R FB2 C2 NCV3020ADR2G SOIC 8 2500 / Tape & Reel R ISET (PbFree) NCV3020BDR2G SOIC8 2500 / Tape & Reel (PbFree) Figure 1. Typical Application Circuit For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2013 1 Publication Order Number: December, 2018 Rev. 7 NCP3020/DNCP3020A, NCP3020B, NCV3020A, NCV3020B VCC INTERNAL BIAS BST POR/STARTUP VC THERMAL SD BOOST CLAMP LEVEL HSDR CLK/ SHIFT DMAX/ OSCILLATOR SOFT START VSW VCC GATE CURRENT SAMPLE & RAMP DRIVE HOLD LIMIT LOGIC 1.5 V ISET + VC COMP REF PWM LSDR COMP OTA FB + BST CHRG OOV OUV GND + Figure 2. NCP3020 Block Diagram PIN FUNCTION DESCRIPTION Pin Pin Name Description 1 V The V pin is the main voltage supply input. It is also used in conjunction with the VSW pin to sense current CC CC in the high side MOSFET. 2 COMP The COMP pin connects to the output of the Operational Transconductance Amplifier (OTA) and the positive terminal of the PWM comparator. This pin is used in conjunction with the FB pin to compensate the voltage mode control feedback loop. 3 FB The FB pin is connected to the inverting input of the OTA. This pin is used in conjunction with the COMP pin to compensate the voltage mode control feedback loop. 4 GND Ground Pin 5 LSDR The LSDR pin is connected to the output of the low side driver which connects to the gate of the low side NFET. It is also used to set the threshold of the current limit circuit (I ) by connecting a resistor from LSDR SET to GND. 6 VSW The VSW pin is the return path for the high side driver. It is also used in conjunction with the V pin to sense CC current in the high side MOSFET. 7 HSDR The HSDR pin is connected to the output of the high side driver which connects to the gate of the high side NFET. 8 BST The BST pin is the supply rail for the gate drivers. A capacitor must be connected between this pin and the VSW pin. www.onsemi.com 2