onsemi NCP694DSAN10T1G

Overview

NCP694DSAN10T1G from onsemi is a 1.0 V fixed-output, 1 A CMOS low-dropout linear voltage regulator in HSON-6 package with enable control and auto-discharge function. It delivers −3 mV load regulation at 1 A, supports input voltages up to 6.0 V, and achieves 0.18 V dropout at 300 mA (1.0 V output). It is designed for portable battery-powered systems requiring stable, low-noise, low-quiescent-power regulation.

For engineers reviewing the NCP694DSAN10T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.0 V fixed output, HSON-6 thermal performance (R_JA = 111 °C/W), ultra-low standby current (≤1.0 µA), auto-discharge capability during shutdown, and compatibility with ceramic output capacitors ≥4.7 µF.

Technical Context

The NCP694DSAN10T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, thermal shutdown, and overcurrent protection. Its enable (CE) pin provides logic-controlled standby mode with fast turn-off and built-in auto-discharge transistor - a feature exclusive to the "D" version family.

It operates across −40°C to +85°C ambient temperature, supports input voltages from 1.4 V to 6.0 V, and maintains output accuracy of ±3% (0.97–1.03 V) at 100 mA. Ripple rejection is 70 dB at 1 kHz, and output noise is 30 µV_RMS (10 Hz–100 kHz), making it suitable for noise-sensitive analog and RF subsystems.

Key Specifications

Pinout & Package

HSON-6 (Case 506AE), Pb-free, exposed pad for thermal dissipation. Package dimensions: 2.90 × 3.00 × 0.70–0.90 mm, 0.95 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Compared with MCP1826-1002E/DB and TLC7601CDR, the NCP694DSAN10T1G uniquely combines 1.0 V fixed output, 1 A capability, HSON-6 thermal efficiency, and integrated auto-discharge - enabling simpler, smaller, and more reliable power sequencing in space- and battery-constrained portable electronics.

Availability

NCP694DSAN10T1G is available at Aetrix Electronics and suitable for wearable health monitors, industrial handheld scanners, and portable medical ultrasound probes requiring stable component supply, full lifecycle support, and Pb-free compliance.

Supply support for NCP694DSAN10T1G 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, with leadership in power management, analog, and sensing technologies.

The NCP694DSAN10T1G belongs to the NCP694 series of super-low-dropout LDOs engineered specifically for high-current, battery-powered portable devices demanding ultra-low standby power and fast, controlled power-down behavior.

FAQ

What is the minimum input voltage required for NCP694DSAN10T1G to regulate 1.0 V at 1 A?

The NCP694DSAN10T1G requires a minimum input voltage of 1.56 V to maintain regulation at 1 A, based on its typical 0.56 V dropout voltage at that load. The datasheet specifies an absolute minimum input of 1.4 V, but stable 1.0 V output at full current is only guaranteed above Vin ≥ V_OUT + V_DROP(MAX). For robust design, use ≥1.6 V input under worst-case conditions including temperature and tolerance.

Does NCP694DSAN10T1G require an external capacitor on the ADJ pin?

No - the NCP694DSAN10T1G is a fixed-output variant (1.0 V), and Pin 3 is labeled ADJ/NC (No Connection). The ADJ pin is unused and must remain unconnected or tied to GND per layout guidelines; no external resistor divider or capacitor is needed or recommended.

How does the auto-discharge function operate in NCP694DSAN10T1G?

When the CE pin is driven low, the NCP694DSAN10T1G disables regulation and activates an internal NMOS transistor between V_OUT and GND. This provides a controlled discharge path for output capacitance, reducing V_OUT to near-zero within microseconds - critical for safe power sequencing and preventing back-powering of upstream circuitry.

Can NCP694DSAN10T1G be used with ceramic output capacitors?

Yes - the NCP694DSAN10T1G is explicitly qualified for ceramic output capacitors ≥4.7 µF. Its internal compensation is stable with low-ESR ceramics, eliminating the need for tantalum or aluminum electrolytic capacitors. Layout best practice requires placing C_OUT as close as possible to Pins 1/2 (V_OUT) and Pin 4 (GND).

What is the thermal resistance (R_JA) of NCP694DSAN10T1G in its HSON-6 package?

The junction-to-ambient thermal resistance (R_JA) of NCP694DSAN10T1G in HSON-6 is 111 °C/W, measured on a standard 80 × 80 × 1.5 mm FR4 PCB with 1 oz copper and 100 mm² copper area. Actual R_JA improves with larger thermal pads, internal copper planes, or thermal vias - enabling 1 A operation up to +85°C ambient with proper layout.