onsemi NCV59748ML075TBG

Overview

NCV59748ML075TBG from onsemi is a fixed-output 0.75 V, 1.5 A dual-rail very low dropout linear voltage regulator with bias rail, programmable soft-start, and open-drain Power-Good output. It uses an NMOS pass transistor for ultra-low dropout (60 mV typ. at 1.5 A), operates from 0.8 V to 5.5 V input, and supports automotive point-of-load regulation in FPGA and DSP power supplies.

For engineers reviewing the NCV59748ML075TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its 0.75 V fixed output, 60 mV dropout at full load, wettable-flank DFNW10 package for optical inspection, bias rail operation (2.7–5.5 V), and AEC-Q100 qualification for automotive systems.

Technical Context

The NCV59748ML075TBG implements a dual-input architecture: VIN supplies the NMOS pass element while VBIAS powers internal control circuitry (error amplifier, reference, soft-start). This separation enables stable regulation even when VIN is as low as 0.8 V - below the VBIAS minimum of 2.7 V.

Its programmable soft-start uses an external capacitor (CSS) charged by a 0.44 µA current to generate monotonic startup; for the 0.75 V fixed version, t_SS = CSS × 1.7 ms/nF. The open-drain PG pin asserts high-impedance when VOUT exceeds 90% of nominal, with 3% hysteresis and ≤0.3 V low-level sink voltage at 1 mA.

Key Specifications

Pinout & Package

NCV59748ML075TBG is housed in a 3×3 mm, 0.5 mm pitch DFNW10 package (Case 507AE) with wettable flanks for automated optical inspection. The exposed thermal pad must be soldered to PCB ground for thermal performance (R_JC = 6.6 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with TPS7A8300RGRT and NCP1117ST50T3G, the NCV59748ML075TBG uniquely combines 0.75 V fixed output, dual-rail operation, AEC-Q100 qualification, and wettable flank packaging - making it the only option for automotive 0.75 V core rails requiring bias isolation and optical inspection compliance.

Availability

NCV59748ML075TBG is available at Aetrix Electronics and suitable for automotive ADAS systems, FPGA power management, and industrial PLC designs requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for NCV59748ML075TBG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCV59748ML075TBG belongs to onsemi's automotive-grade linear regulator product line, engineered specifically for low-voltage, high-current point-of-load regulation in safety-critical vehicle subsystems requiring AEC-Q100 compliance and robust thermal performance.

FAQ

What is the minimum input voltage required for NCV59748ML075TBG to maintain regulation?

The NCV59748ML075TBG requires VIN ≥ VOUT + VDO, where VDO is 60 mV typical at 1.5 A. For its fixed 0.75 V output, the minimum functional VIN is therefore 0.81 V. Absolute minimum VIN rating is −0.3 V, but regulation is only guaranteed above the dropout threshold. Operation below 0.8 V will cause output collapse.

Does NCV59748ML075TBG require an external feedback resistor network?

No. The NCV59748ML075TBG is the fixed 0.75 V version and uses internal feedback; Pin 8 is labeled SNS (Sense), not FB. It must be connected directly to the regulated output node. External resistors are only required for the adjustable versions (e.g., NCV59748MLADJTBG).

How is the soft-start time calculated for NCV59748ML075TBG?

For the fixed 0.75 V version, soft-start time t_SS = CSS × 1.7 ms/nF, where CSS is the capacitor value in nanofarads connected between SS (Pin 7) and GND. For example, a 1 nF capacitor yields ~1.7 ms ramp time. Maximum recommended CSS is 15 nF to ensure full discharge before subsequent startup cycles.

What is the purpose of the BIAS pin on NCV59748ML075TBG?

The BIAS pin supplies power to the internal error amplifier, reference, and control circuitry independently of VIN. It must be held between 2.7 V and 5.5 V. This dual-rail architecture allows stable regulation even when VIN drops below 2.7 V - such as during cold-crank conditions - as long as VBIAS remains valid.

Is NCV59748ML075TBG compatible with standard reflow profiles for lead-free soldering?

Yes. The NCV59748ML075TBG is Pb-free and qualified for standard JEDEC J-STD-020D reflow profiles. Its DFNW10 package with wettable flanks supports both visual and automated optical inspection of solder fillets. Thermal pad soldering to the PCB ground plane is mandatory for thermal performance and reliability.