onsemi NCV6323DMTAATBG

Overview

NCV6323DMTAATBG from onsemi is a synchronous buck converter optimized for sub-system power delivery in portable electronics powered by single-cell Li-ion or triple-cell alkaline/NiCd/NiMH batteries. It delivers up to 2 A output current with adjustable voltage (0.6 V to VIN), operates at 3 MHz switching frequency, and features integrated high-side (130 mΩ) and low-side (100 mΩ) MOSFETs in a WDFN8 2.0 × 2.0 mm package - enabling compact, high-efficiency point-of-load regulation in smartphones and digital cameras.

For engineers reviewing the NCV6323DMTAATBG datasheet, pinout, applications, or equivalent options, key selection criteria include its automotive-grade AEC-Q100 qualification, 2.5–5.5 V input range, power-good monitoring, active output discharge, and thermal shutdown at 170 °C - all critical for reliable battery-powered system design.

Technical Context

The NCV6323DMTAATBG employs input-voltage feedforward control to maintain stable regulation across its 2.5–5.5 V input range while operating in fixed-frequency PWM mode at 3.0 MHz (±10%). Its dual-MOSFET synchronous rectification architecture eliminates external diode losses, achieving >85% efficiency at 1.8 V/1 A output with 3.6 V input.

Internal protection includes cycle-by-cycle overcurrent limiting (2.8 A typical peak), undervoltage lockout (2.4 V falling threshold with 140 mV hysteresis), and thermal shutdown (170 °C trip, 25 °C hysteresis). The device integrates soft-start (320 µs typical ramp time), enable logic with 270 mV hysteresis, and open-drain power-good output with 90% V_FB threshold and 5% hysteresis.

Key Specifications

Pinout & Package

NCV6323DMTAATBG is housed in a space-saving, low-profile WDFN8 package (2.0 × 2.0 × 0.75 mm, 0.5 mm pitch) with wettable flanks for automated optical inspection. The exposed thermal pad (Pin 9) must be soldered to PCB ground for optimal power dissipation (R_JB = 30 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with MP2143GQ-Z and TPS62231DRVR, the NCV6323DMTAATBG uniquely combines AEC-Q100 qualification, 2 A output, 3 MHz operation, and power-good signaling in a 2 × 2 mm wettable-flank package - making it the only drop-in option for automotive-qualified, space-constrained, high-transient-response applications.

Availability

NCV6323DMTAATBG is available at Aetrix Electronics and suitable for smartphone power management, automotive infotainment subsystems, and portable camera modules requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for NCV6323DMTAATBG 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 (formerly ON Semiconductor) is a global semiconductor leader specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NCV6323DMTAATBG belongs to onsemi's automotive-qualified DC-DC converter product line, designed specifically for high-efficiency, small-footprint power delivery in safety-critical and thermally demanding portable and vehicle-mounted electronics.

FAQ

What is the maximum output current capability of the NCV6323DMTAATBG?

The NCV6323DMTAATBG delivers up to 2.0 A continuous output current under recommended operating conditions (T_J ≤ 125 °C, proper thermal layout). Peak current limit is 2.8 A typical, with cycle-by-cycle protection preventing damage during short transients. Actual achievable current depends on input voltage, output voltage, ambient temperature, and PCB thermal design - e.g., at 3.6 V input and 1.8 V output, ≥1.8 A is sustainable with adequate copper area and thermal vias.

Does the NCV6323DMTAATBG support power sequencing with other system rails?

Yes, the NCV6323DMTAATBG supports robust power sequencing via its dedicated EN (enable) and PG (power-good) pins. EN accepts standard logic-level signals (1.1 V high threshold), while PG provides an open-drain output that goes high-impedance only after output voltage stabilizes within 90% of target. This allows cascaded startup/shutdown control - for example, enabling a downstream LDO only after NCV6323DMTAATBG confirms regulation.

What package type and thermal characteristics does the NCV6323DMTAATBG use?

The NCV6323DMTAATBG uses the WDFN8 package (2.0 × 2.0 × 0.75 mm, 0.5 mm pitch) with wettable flanks (Case 511CL). Its exposed thermal pad (Pin 9) must be soldered to a solid ground plane. With proper layout (≥4 thermal vias, multilayer board), it achieves R_JA = 62 °C/W and R_JB = 30 °C/W - enabling 2 A operation at +85 °C ambient when mounted on a 4-layer PCB with 1 oz copper planes.

Is the NCV6323DMTAATBG suitable for automotive applications?

Yes, the NCV6323DMTAATBG is explicitly qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C) and supports PPAP documentation. Its design includes automotive-specific features: enhanced ESD robustness (2 kV HBM), wider input range (2.5–5.5 V) accommodating battery fluctuations, and thermal shutdown with 25 °C hysteresis to prevent latch-up in hot under-hood environments - making it suitable for infotainment, telematics, and ADAS subsystems.

How does the NCV6323DMTAATBG handle light-load efficiency?

The NCV6323DMTAATBG operates in forced PWM mode across all loads, maintaining fixed 3 MHz frequency for predictable EMI and transient response. Its quiescent current is 5.7 mA typical at no load - optimized for systems where consistent switching behavior outweighs ultra-low-I_Q benefits. For applications requiring higher light-load efficiency, external enable control can gate the NCV6323DMTAATBG during idle periods to reduce system standby power.