onsemi NCP583XV15T1G

Overview

NCP583XV15T1G from onsemi is a 1.5 V fixed-output, ultra-low quiescent current CMOS LDO regulator in SOT-563 package, delivering 150 mA output with 250 mV dropout at full load, ±2% output voltage accuracy, and active-high enable control-designed for battery-powered portable equipment requiring stable low-noise supply under light-load conditions.

For engineers reviewing the NCP583XV15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 0.1 µA quiescent current in shutdown, 1.0 µA operating supply current, 1.5 V to 3.3 V input range, high PSRR (>50 dB at 1 kHz), and SOT-563 footprint compatibility with space-constrained handheld designs.

Technical Context

The NCP583XV15T1G implements a CMOS-based LDO architecture with internal reference, error amplifier, and pass transistor-optimized for minimal static current draw while maintaining tight regulation across line, load, and temperature. Its enable logic accepts active-high CE input with 1.2 V typical threshold and 0.3 V max low-level voltage.

It operates over −40°C to +85°C junction temperature, supports 1.0 µF input and 0.1 µF ceramic output capacitors, and integrates foldback current limiting and thermal shutdown. Dropout behavior is specified down to 250 mV at 150 mA for V_OUT = 1.5 V, scaling lower for higher output voltages.

Key Specifications

Pinout & Package

SOT-563 (Case 463A) is a 6-pin, 1.6 mm × 1.6 mm × 0.55 mm surface-mount package with dual GND pins for improved thermal and electrical performance. Pin 4 is NC (no connect); pins 2 and 5 are internally tied to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1502E/TT and XC6206P152MR-G, the NCP583XV15T1G uniquely combines dual-GND thermal enhancement, 50 dB PSRR, and active-high enable in a 1.6 mm² footprint-making it optimal for space- and noise-sensitive battery-powered systems requiring precise power sequencing.

Availability

NCP583XV15T1G is available at Aetrix Electronics and suitable for wearable health monitors, BLE modules, industrial wireless sensors, and portable medical testers requiring stable component supply with guaranteed long-term manufacturability.

Supply support for NCP583XV15T1G 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP583 series targets ultra-low-power portable electronics, emphasizing sub-µA quiescent current, small-footprint packaging, and high accuracy for battery-constrained systems where runtime and board space are critical.

FAQ

What is the maximum input voltage rating for the NCP583XV15T1G?

The NCP583XV15T1G has an absolute maximum input voltage rating of 6.5 V. Operation above this level risks permanent damage. For normal operation, the recommended input range is 1.5 V to 3.3 V, aligning with its design for single-cell Li-ion or alkaline battery inputs. The NCP583XV15T1G must never be exposed to input transients exceeding 6.5 V, even briefly.

Does the NCP583XV15T1G require an external capacitor on the CE pin?

No, the NCP583XV15T1G does not require an external capacitor on the CE pin. The enable input is CMOS-compatible with TTL logic thresholds (1.2 V typical high, 0.3 V max low) and exhibits negligible input current (<100 nA). Adding capacitance to CE may slow enable/disable timing and is not recommended unless intentional delay is needed-and then only after verifying timing margins in the target application. The NCP583XV15T1G functions reliably with direct GPIO control.

Can the NCP583XV15T1G be used with a 0.1 µF output capacitor only?

Yes-the NCP583XV15T1G is stable with a minimum 0.1 µF ceramic output capacitor, as confirmed in the datasheet's Application Information section. This value provides adequate phase margin for load transients up to 100 mA. For improved transient response under heavier or faster load steps (e.g., >100 mA, <10 µs rise time), a 1.0 µF output capacitor is recommended. The NCP583XV15T1G does not require high-ESR or tantalum capacitors and performs best with X5R/X7R ceramics.

What is the thermal resistance (θ_JA) of the NCP583XV15T1G in SOT-563?

The NCP583XV15T1G in SOT-563 (Case 463A) has a typical junction-to-ambient thermal resistance (θ_JA) of 220°C/W with standard JEDEC 2-layer board layout (1 in² copper pad). With enhanced PCB copper (2 in²), θ_JA improves to ~140°C/W. At 150 mA and 250 mV dropout, power dissipation is 37.5 mW-resulting in <10°C junction rise above ambient under standard layout. The NCP583XV15T1G remains well within its −40°C to +85°C operating range without heatsinking.

Is the NCP583XV15T1G pin-compatible with other NCP583 variants in SOT-563?

Yes-all NCP583XVxxT1G variants (e.g., NCP583XV18T1G, NCP583XV25T1G) share identical SOT-563 pinout, package dimensions, and terminal functions. Only the output voltage and marking differ. This allows drop-in replacement during design iteration or voltage optimization without PCB revision. The NCP583XV15T1G can be substituted with any other XV-suffix variant using the same layout and bill of materials, provided system-level voltage tolerance permits.