onsemi NCP694H08HT1G

Overview

NCP694H08HT1G from onsemi is a 1 A, 0.8 V fixed-output CMOS low-dropout linear voltage regulator in SOT-89-5 package, featuring −3 mV load regulation at 1 A, 0.18 V dropout at 300 mA, and enable-controlled standby mode with 0.1–1.0 µA quiescent current. It serves as a precision core supply for battery-powered microcontrollers and RF ICs in portable instrumentation.

For engineers reviewing the NCP694H08HT1G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low dropout at 1 A, ±3% output voltage accuracy over temperature, thermal shutdown at 150°C, and compatibility with 4.7 µF ceramic output capacitors in space-constrained handheld designs.

Technical Context

The NCP694H08HT1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal shutdown circuitry. Its architecture delivers stable 0.8 V output with no external feedback resistors and supports enable-driven power sequencing via the CE pin.

It operates across 1.4 V to 6.0 V input range, maintains regulation down to (Vin − Vout) = 0.18 V at 300 mA and 0.72 V at 1 A, and achieves 70 dB PSRR at 1 kHz - enabling clean power delivery to noise-sensitive analog and digital loads in mixed-signal portable systems.

Key Specifications

Pinout & Package

Package: SOT-89-5 (Case 528AB), surface-mount, thermally enhanced 5-pin plastic package with exposed tab for improved heat dissipation (R_JA = 111°C/W on 100 mm² 1 oz Cu).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP694H08HT1G, NCP694H10HT1G offers identical performance at 1.0 V output and drop-in compatibility, while MCP1804T-0802I/MB provides smaller footprint but cannot support the 1 A current demand - making it unsuitable for high-performance portable processors.

Availability

NCP694H08HT1G is available at Aetrix Electronics and suitable for battery-powered instrumentation, hand-held test equipment, camcorders, and portable communication modules requiring stable component supply and long-term manufacturability.

Supply support for NCP694H08HT1G 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP694 series is part of onsemi's precision power management portfolio, designed specifically for ultra-low-voltage, high-current portable electronics where battery life, thermal efficiency, and small form factor are critical.

FAQ

What is the minimum input voltage required for NCP694H08HT1G to regulate 0.8 V output?

The NCP694H08HT1G requires a minimum input voltage of 1.4 V to maintain regulation at 0.8 V output. This is defined in the Recommended Operating Conditions table and verified across temperature and load. Below 1.4 V, the device enters dropout and output voltage drops linearly with input. The 0.18 V dropout at 300 mA means Vin ≥ 0.98 V is theoretically possible, but 1.4 V is the guaranteed operational floor per datasheet specification for NCP694H08HT1G.

Can NCP694H08HT1G be used with a 4.7 µF ceramic capacitor on the output?

Yes, NCP694H08HT1G is explicitly characterized and stable with 4.7 µF ceramic (X5R/X7R) output capacitors, as confirmed in the Applications Information section and Typical Characteristics. The regulator does not require ESR-based compensation, eliminating instability risks common with low-ESR ceramics. Using a 4.7 µF ceramic capacitor improves transient response and reduces board area compared to tantalum alternatives for NCP694H08HT1G.

What happens to the output when the CE pin of NCP694H08HT1G is pulled low?

When the CE pin of NCP694H08HT1G is pulled to ≤0.4 V (logic low), the regulator enters ultra-low-power standby mode, disabling the pass transistor and reducing quiescent current to 0.1–1.0 µA. The output voltage collapses to near 0 V with no significant leakage - verified in Figure 33 (CE Turn-Off waveform). This behavior enables precise system-level power gating without external switches, preserving battery charge during sleep states in NCP694H08HT1G-based designs.

Is NCP694H08HT1G compatible with lead-free reflow soldering processes?

Yes, NCP694H08HT1G is a Pb-free device compliant with JEDEC J-STD-020 moisture sensitivity level 3 and qualified for standard lead-free reflow profiles (peak temperature ≤260°C). The "G" suffix in the part number confirms RoHS-compliant termination finish. Thermal characteristics including R_JA = 111°C/W are specified for the SOT-89-5 package under JEDEC-standard board conditions, ensuring reliable solder joint integrity and thermal performance post-reflow for NCP694H08HT1G.

Does NCP694H08HT1G include overcurrent protection?

Yes, NCP694H08HT1G includes internal short-circuit current limiting set at 250 mA (typical), as specified in the Electrical Characteristics table under "Short Current Limit (Vout = 0 V)". This protection activates when output current exceeds the limit, clamping I_OUT and preventing damage during fault conditions. It operates independently of thermal shutdown and remains active across the full operating temperature range, providing robust fault tolerance for NCP694H08HT1G in end-equipment deployments.