NCV59749 Linear Regulator - Dual-Rail, Very LowDropout, Programmable SoftStart www.onsemi.com 3.0 A The NCV59749 is dualrail very low dropout voltage regulator that is capable of providing an output current in excess of 3.0 A with a dropout voltage of 120 mV typ. at full load current. The devices are QFN20 stable with ceramic and any other type of output capacitor 2.2 F. CASE 485DB This series contains adjustable output voltage version with output voltage down to 0.8 V. Internal protection features consist of builtin PIN CONNECTIONS thermal shutdown and output current limiting protection. Userprogrammable SoftStart and Power Good pins are available. The NCV59749 is available in QFN20 5x5 package. 5 4 3 2 1 6 20 OUT IN Features 7 19 IN OUT Output Current in Excess of 3.0 A IN 8 GND 18 OUT V Range: 0.8 V to 5.5 V IN PG 9 17 NC BIAS 10 16 FB V Range: 2.7 V to 5.5 V BIAS 11 12 13 14 15 Output Voltage Range: 0.8 V to 3.6 V Dropout Voltage: 120 mV at 3 A Programmable Soft Start QFN20, 5x5, 0.65P Open Drain Power Good Output Fast Transient Response MARKING DIAGRAM Stable with Any Type of Output Capacitor 2.2 F 1 Current Limit and Thermal Shutdown Protection NCV59749 NCV Prefix for Automotive and Other Applications Requiring AWLYYWW Unique Site and Control Change Requirements AECQ100 Qualified and PPAP Capable These are PbFree Devices QFN20 A = Assembly Location Applications WL = Wafer Lot Automotive, Consumer and Industrial Equipment Point of Load YY = Year Regulation WW = Work Week = Pb-Free Package FPGA, DSP and Logic Power Supplies (Note: Microdot may be in either location) Switching Power Supply Post Regulation NCV59749 ORDERING INFORMATION See detailed ordering, marking and shipping information in the package dimensions section on page 9 of this data sheet. Figure 1. Typical Application Schematic Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: February, 2017 Rev. 1 NCV59749/D EN IN GND NC NC NC NC NC SS OUTNCV59749 Figure 2. Simplified Schematic Block Diagram Table 1. PIN FUNCTION DESCRIPTION Name QFN20 Description IN 58 Unregulated input to the device. EN 11 Enable pin. Driving this pin high enables the regulator. Driving this pin low puts the regulator into shutdown mode. This pin must not be left floating. SS 15 Soft-Start pin. A capacitor connected on this pin to ground sets the start-up time. If this pin is left floating, the regulator output soft-start ramp time is typically 200 s. BIAS 10 Bias input voltage for error amplifier, reference, and internal control circuits. PG 9 Power-Good (PG) is an open-drain, active-high output that indicates the status of V . When V OUT OUT exceeds the PG trip threshold, the PG pin goes into a high-impedance state. When V is below this OUT threshold the pin is driven to a low-impedance state. A pull-up resistor from 10 k to 1 M should be connected from this pin to a supply up to 5.5 V. The supply can be higher than the input voltage. Alternatively, the PG pin can be left floating if output monitoring is not necessary. FB 16 This pin is the feedback connection to the center tap of an external resistor divider network that sets the output voltage. This pin must not be left floating. OUT 1, 1820 Regulated output voltage. A small capacitor (total typical capacitance 2.2 F, ceramic) is needed from this pin to ground to assure stability. NC 24, 13, 14, 17 No connection. This pin can be left floating or connected to GND to allow better thermal contact to the top-side plane. GND 12 Ground PAD/TAB Should be soldered to the ground plane for increased thermal performance www.onsemi.com 2