onsemi NCV8161BSN280T1G

Overview

NCV8161BSN280T1G from onsemi is an automotive-grade ultra-low-noise, high-PSRR LDO regulator delivering 450 mA output current at a fixed 2.8 V output. Designed for RF and analog circuits in safety-critical environments, it features ±2% output accuracy over −40°C to +125°C, 225 mV dropout at full load (TSOP−5), and 10 µV_RMS output noise. It powers sensitive modules such as parking camera systems where supply stability directly impacts image sensor SNR.

For engineers reviewing the NCV8161BSN280T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC−Q100 Grade 1 qualification, 98 dB PSRR at 1 kHz, active discharge disable status (Version B), thermal shutdown threshold of 160°C, and compatibility with 1 µF ceramic input/output capacitors.

Technical Context

The NCV8161BSN280T1G employs a PMOS pass transistor architecture enabling low dropout and inherent reverse-current blocking. Its bandgap reference and integrated soft-start ensure stable startup under varying load and temperature conditions, while thermal shutdown and current limiting protect against fault conditions across the full automotive ambient range.

This device operates within a 1.9 V to 5.5 V input range and maintains regulation down to 225 mV headroom at 450 mA (TSOP−5 package). Unlike Version A, it omits active output discharge - confirmed by ordering code "B" and absence of R_DIS specification - simplifying bias sequencing in systems where rapid V_OUT decay is not required.

Key Specifications

Pinout & Package

NCV8161BSN280T1G is packaged in TSOP−5 (Case 483, 3.00 × 1.50 × 0.95 mm), optimized for space-constrained automotive PCBs. The exposed pad (EPAD) must be connected to ground for thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with NCV8161ASN280T1G, the NCV8161BSN280T1G removes active discharge to simplify bias control and reduce leakage risk in always-on camera nodes; versus TPS7A2028PDBVR, it trades lower quiescent current for guaranteed automotive reliability, wider temperature support, and higher PSRR at 1 kHz.

Availability

NCV8161BSN280T1G is available at Aetrix Electronics and suitable for automotive camera modules, infotainment systems, and wireless connectivity subsystems requiring stable component supply with full AEC−Q100 compliance and long-term production continuity.

Supply support for NCV8161BSN280T1G 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 supplier focused on energy-efficient electronics for automotive, industrial, cloud, medical, and IoT applications.

The NCV8161 series is part of onsemi's automotive power management portfolio, engineered specifically for noise-sensitive RF/analog subsystems in ADAS and infotainment platforms where precision, reliability, and qualification rigor are mandatory.

FAQ

What is the dropout voltage of NCV8161BSN280T1G at 450 mA load?

The dropout voltage of NCV8161BSN280T1G is 225 mV at 450 mA load when using the TSOP−5 package, measured at 2.8 V nominal output. This value increases slightly in the XDFN4 variant (195 mV typ) due to lower thermal resistance. Dropout remains stable across −40°C to +125°C junction temperature per datasheet Figure 13 and Table 4.

Does NCV8161BSN280T1G include active output discharge functionality?

No, NCV8161BSN280T1G does not include active output discharge. The "B" in the part number explicitly denotes Version B, which omits the internal discharge transistor. This is confirmed in the Ordering Information table and absence of R_DIS parameter in Electrical Characteristics - unlike Version A (e.g., NCV8161ASN280T1G) which specifies R_DIS = 280 Ω.

What input and output capacitors are required for stable operation of NCV8161BSN280T1G?

NCV8161BSN280T1G requires a minimum 1 µF X7R or X5R ceramic capacitor on both input (C_IN) and output (C_OUT), placed as close as possible to their respective pins. The device remains stable down to 0.7 µF effective capacitance, accounting for DC bias derating - especially critical for 0201-size MLCCs. ESR must be <2 Ω on C_OUT; tantalum capacitors are not recommended.

Is NCV8161BSN280T1G qualified for automotive applications?

Yes, NCV8161BSN280T1G is AEC−Q100 qualified (Grade 1: −40°C to +125°C ambient), PPAP-capable, and manufactured under automotive-specific process controls. The "NCV" prefix indicates compliance with automotive site and change control requirements, making it suitable for safety-critical domains including parking cameras and ADAS sensor interfaces.

How does the enable pin (EN) function on NCV8161BSN280T1G?

The EN pin on NCV8161BSN280T1G is active-high: applying ≥1.2 V enables regulation, while ≤0.4 V disables output and reduces supply current to 0.01 µA typ. An internal 200 nA pull-down ensures default-off behavior when left floating. For always-on operation, EN may be tied directly to IN; no external pull-up is required.