onsemi NCP176AMX100TCG

Overview

NCP176AMX100TCG from onsemi is a CMOS low-dropout (LDO) regulator delivering 500 mA output current with 1.0 V fixed output voltage, 1.4 V minimum input voltage, and 130 mV typical dropout at 500 mA (V_OUT = 2.5 V). It features ±0.8% output accuracy (for V_OUT > 1.8 V), 60 µA quiescent current, and stable operation with 1 µF ceramic capacitors. It is used in battery-powered portable imaging systems requiring fast transient response and low-noise power.

For engineers reviewing the NCP176AMX100TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.0 V fixed output, XDFN6 1.2 mm × 1.2 mm package, output discharge function (A-version), thermal shutdown at 165°C, and compatibility with ultra-low-ESR ceramic output capacitors.

Technical Context

The NCP176AMX100TCG employs a PMOS pass transistor architecture enabling ultra-low dropout and reverse-current protection via an inherent body diode. Its adaptive ground current design maintains 60 µA quiescent current under no-load conditions while supporting up to 500 mA continuous output.

It integrates a built-in soft-start circuit to suppress inrush current during enable, a precision 0.7 V internal reference for output regulation, and active output discharge (enabled when EN = 0 V) via a 60 Ω typ. internal NMOS switch - a feature exclusive to the "A" variant as confirmed in ordering table and block diagram.

Key Specifications

Pinout & Package

XDFN6 package: 1.2 mm × 1.2 mm × 0.4 mm body, exposed pad (EPAD), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1804T-1002E/MB and XC6210B102MR-G, the NCP176AMX100TCG uniquely delivers 500 mA at 1.0 V with integrated output discharge and guaranteed thermal hysteresis - making it the only option among the three qualified for high-current, multi-rail portable medical and imaging systems requiring deterministic power sequencing.

Availability

NCP176AMX100TCG is available at Aetrix Electronics and suitable for battery-powered equipment, portable communication devices, and image sensor modules requiring stable component supply across production lifecycles.

Supply support for NCP176AMX100TCG 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, and intelligent power systems.

The NCP176AMX100TCG belongs to onsemi's high-performance LDO family designed specifically for noise-sensitive, space-constrained portable applications demanding fast transient response, ultra-low IQ, and robust protection.

FAQ

What is the output voltage tolerance of the NCP176AMX100TCG over temperature?

The NCP176AMX100TCG has a guaranteed output voltage tolerance of ±1.5% over −40°C to +85°C ambient temperature, based on Table 4's specification for devices with V_OUT-NOM < 1.8 V. At +25°C, the tolerance is tighter at ±18 mV (±1.8%). This performance is achieved using a precision internal voltage reference and trimmed feedback network, ensuring reliable operation in consumer and industrial portable environments where thermal cycling occurs.

Does the NCP176AMX100TCG require an external feedback resistor network?

No, the NCP176AMX100TCG does not require an external feedback resistor network. It is a fixed-output LDO with factory-trimmed 1.0 V regulation, as confirmed by the "Voltage Option: 1.0 V" in the ordering table and the internal block diagram showing direct connection of the FB pin to the internal reference. The FB pin (Pin 2) is not user-accessible for adjustment - simplifying layout and eliminating resistor tolerance errors.

How does the output discharge function operate in the NCP176AMX100TCG?

In the NCP176AMX100TCG (A-version), the output discharge function activates automatically when the EN pin voltage falls below 0.4 V. An internal NMOS transistor connects the OUT pin to GND through a 60 Ω typical resistance, discharging the output capacitor. This behavior is explicitly documented in Table 1 (Pin Function Description), Figure 2 (block diagram), and Applications Information - ensuring rapid, controlled rail collapse during power-down sequences in multi-voltage systems.

Can the NCP176AMX100TCG be used with input voltages below 1.4 V?

No, the NCP176AMX100TCG is not rated for input voltages below 1.4 V. Absolute Maximum Ratings specify a minimum input voltage of −0.3 V, but the functional operating range begins at 1.4 V, as stated in Features and Table 4. Below 1.4 V, regulation fails, dropout increases nonlinearly, and output accuracy degrades beyond specification - verified by Figure 8–11 showing measurable V_DO rise and instability onset near VIN = 1.4 V.

What is the maximum allowable power dissipation for the NCP176AMX100TCG on a standard 1 oz copper PCB?

On a standard 1 oz copper PCB with moderate copper area (~200 mm²), the NCP176AMX100TCG has a maximum power dissipation (P_D(MAX)) of approximately 0.45 W at 25°C ambient, calculated using θ_JA = 123°C/W and T_J(MAX) = 150°C (from Table 2). This assumes proper thermal design: EPAD and Pin 5 (N/C) soldered to GND plane. Derating is required above 25°C ambient - e.g., ~0.3 W at 50°C - as shown in Figure 30's PD(MAX) vs. copper area curves.