Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

onsemi NCP585DSAN09T1G

Name: NCP585DSAN09T1G
Brand: onsemi
SKU: NCP585DSAN09T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: NCP585DSAN09T1G

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 6-VQFN Exposed Pad

Datasheet:: NCP585DSAN09T1G.pdf

Description:: IC REG LINEAR 0.9V 300MA 6HSON

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:12,000

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

NCP585DSAN09T1G from onsemi is a tri-mode 300 mA CMOS low-dropout regulator with enable and auto-discharge, delivering fixed 0.9 V output in HSON-6 package. It supports Chip Enable (CE), Fast Transient (FT), and Low Power (LP) modes via the ECO pin, features 550 mV dropout at 300 mA, 2% output accuracy, and 70 dB PSRR at 1 kHz - optimized for portable battery-powered systems requiring ultra-low quiescent current and high ripple rejection.

For engineers reviewing the NCP585DSAN09T1G datasheet, pinout, applications, or equivalent options, key selection criteria include mode-selectable quiescent current (3.5 µA in LP mode), ECO-controlled transient response trade-offs, dropout performance at 0.9 V output, and HSON-6 thermal and layout constraints for space-constrained handheld instrumentation.

Technical Context

The NCP585DSAN09T1G implements a CMOS-based LDO architecture with three distinct operational modes controlled by the ECO pin voltage: CE mode (enable/disable), FT mode (VECO = Vin, prioritizing load transient response), and LP mode (VECO = GND, minimizing I_q). Its internal foldback protection and auto-discharge circuitry actively discharge V_OUT during shutdown.

It operates across 1.4–6.0 V input range with 0.9 V fixed output, supports up to 300 mA continuous load, and maintains stability with 1.0 µF tantalum output capacitor. The device exhibits temperature-coefficient-limited output drift (100 ppm/°C) and requires no external compensation due to internal stability design verified across ESR/load conditions per Figure 32–35.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 0.9 V ±2% (FT mode), ±3% (LP mode) - ensures precise core voltage for low-voltage microcontrollers and sensors.
Max Output Current	300 mA - sufficient to power single-core MCUs, RF transceivers, or sensor signal chains without external boost.
Dropout Voltage	550 mV at 300 mA (FT mode, 0.9 V out) - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (2.4 V min) with margin.
Quiescent Current	3.5 µA (LP mode, V_OUT < 1.6 V) - extends battery life in always-on monitoring applications like wearables and IoT endpoints.
PSRR	70 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for ADC reference and RF bias rails.
Line Regulation	0.01%/V (FT mode) - maintains tight output under battery voltage sag during pulse loads, reducing need for software calibration.
Shutdown Current	0.1 µA - enables true zero-power sleep states in portable equipment with hardware-controlled power sequencing.

Pinout & Package

HSON−6 (Case 506AE) package: 2.9 mm × 3.0 mm × 0.9 mm body, exposed thermal pad, lead pitch 0.95 mm, Pb-free, RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (Vin)	Power input	Accepts 1.4–6.5 V supply; requires 1.0 µF ceramic decoupling close to pin to ensure stability and noise immunity.
2 (GND)	Ground reference	Primary return path for load and internal bias currents; must be connected to low-impedance ground plane under exposed pad.
3 (CE)	Chip enable (active-high)	Drives internal pass transistor; logic-high ≥1.0 V enables regulation, logic-low ≤0.3 V disables output and activates auto-discharge.
4 (ECO)	Mode selection	VECO = Vin selects FT mode (fast transient response); VECO = GND selects LP mode (ultra-low I_q); open or floating not allowed.
5 (Vout)	Regulated output	Delivers stable 0.9 V; requires 1.0 µF low-ESR tantalum capacitor placed adjacent to pin for optimal transient behavior.
6 (NC)	No connect	Internally unconnected; must remain floating - no routing or soldering permitted to avoid parasitic coupling or mechanical stress.

Key Features

Feature	Design Value
Tri-mode operation (CE/FT/LP)	Enables dynamic power-state adaptation: CE for on/off control, FT for active processing, LP for standby - eliminating need for external mode-switching logic.
Foldback current limiting	Reduces output short-circuit power dissipation to safe levels (I_LIM ≈ 50 mA), preventing thermal runaway during fault conditions without external fusing.
Auto-discharge function	Actively pulls V_OUT to GND within milliseconds of CE deactivation, ensuring rapid rail collapse for safe downstream power sequencing and reset timing.
Low temperature drift	100 ppm/°C output variation over −40°C to +85°C ambient - eliminates need for system-level temperature compensation in industrial handheld instruments.
High PSRR at 10 kHz	65 dB rejection at 10 kHz - mitigates noise from high-frequency DC-DC converters and digital clock harmonics affecting analog front-ends.

Applications

Portable Medical Sensors	Wearable Health Monitors
Use Scenario: Continuous glucose monitor (CGM) using ultra-low-power MCU and electrochemical sensor interface. IC Role / Device Role / Timing Role: Primary 0.9 V supply for sensor bias and ADC reference, dynamically switching between FT mode during measurement bursts and LP mode during 5-minute sampling intervals. Use Value: 3.5 µA quiescent current in LP mode extends coin-cell battery life beyond 6 months; 550 mV dropout allows direct use of aging 2.4 V alkaline cells.	Use Scenario: Optical heart-rate sensor module in fitness band with motion-triggered data capture. IC Role / Device Role / Timing Role: Regulator for photodiode amplifier and optical driver IC, enabling fast wake-from-sleep (<100 µs) via CE pin while maintaining sub-µA sleep current. Use Value: Auto-discharge ensures clean power-down of optical subsystem before MCU enters deep sleep, preventing false wake events from residual charge.
Industrial Handheld Scanners	Low-Power Wireless Transceivers
Use Scenario: Rugged barcode scanner with laser diode driver and ARM Cortex-M0+ processor. IC Role / Device Role / Timing Role: Core 0.9 V rail for processor and memory, operating in FT mode during scan decode and LP mode during idle polling. Use Value: 0.01%/V line regulation maintains consistent CPU timing across 3.0–4.2 V Li-ion discharge curve, avoiding firmware recalibration.	Use Scenario: Sub-GHz ISM-band transceiver (e.g., Si4463) in battery-powered smart meter endpoint. IC Role / Device Role / Timing Role: Clean 0.9 V supply for RF synthesizer VCO and baseband ADC, rejecting switching noise from companion buck converter. Use Value: 70 dB PSRR at 1 kHz prevents LO pulling and phase noise degradation, meeting FCC spectral mask requirements without additional filtering.

Portable Medical Sensors

Wearable Health Monitors

Use Scenario: Continuous glucose monitor (CGM) using ultra-low-power MCU and electrochemical sensor interface.

IC Role / Device Role / Timing Role: Primary 0.9 V supply for sensor bias and ADC reference, dynamically switching between FT mode during measurement bursts and LP mode during 5-minute sampling intervals.

Use Value: 3.5 µA quiescent current in LP mode extends coin-cell battery life beyond 6 months; 550 mV dropout allows direct use of aging 2.4 V alkaline cells.

Use Scenario: Optical heart-rate sensor module in fitness band with motion-triggered data capture.

IC Role / Device Role / Timing Role: Regulator for photodiode amplifier and optical driver IC, enabling fast wake-from-sleep (<100 µs) via CE pin while maintaining sub-µA sleep current.

Use Value: Auto-discharge ensures clean power-down of optical subsystem before MCU enters deep sleep, preventing false wake events from residual charge.

Industrial Handheld Scanners

Low-Power Wireless Transceivers

Use Scenario: Rugged barcode scanner with laser diode driver and ARM Cortex-M0+ processor.

IC Role / Device Role / Timing Role: Core 0.9 V rail for processor and memory, operating in FT mode during scan decode and LP mode during idle polling.

Use Value: 0.01%/V line regulation maintains consistent CPU timing across 3.0–4.2 V Li-ion discharge curve, avoiding firmware recalibration.

Use Scenario: Sub-GHz ISM-band transceiver (e.g., Si4463) in battery-powered smart meter endpoint.

IC Role / Device Role / Timing Role: Clean 0.9 V supply for RF synthesizer VCO and baseband ADC, rejecting switching noise from companion buck converter.

Use Value: 70 dB PSRR at 1 kHz prevents LO pulling and phase noise degradation, meeting FCC spectral mask requirements without additional filtering.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1804T-0902E/MB	Fixed 0.9 V, 150 mA max, SOT-23-5, no tri-mode - only enable/disable; 1.2 µA I_q in shutdown but no LP mode.	Lacks ECO-controlled FT/LP trade-off; unsuitable for systems requiring dynamic transient response optimization.	Select when cost-sensitive designs need basic 0.9 V regulation without mode flexibility and <150 mA load.
Torex XC6210B092MR-G	0.9 V, 300 mA, SOT-25, 2.5 µA I_q, no ECO pin - single LDO mode with soft-start; 60 dB PSRR at 1 kHz.	Missing auto-discharge and tri-mode control; requires external discharge FET if rapid rail collapse needed.	Choose for space-constrained PCBs needing minimal BOM count and moderate PSRR, where ECO functionality is unnecessary.

Compared with MCP1804T-0902E/MB and XC6210B092MR-G, the NCP585DSAN09T1G uniquely delivers programmable transient response and ultra-low I_q via ECO pin - enabling adaptive power management unattainable with fixed-mode alternatives, while maintaining identical 0.9 V output and 300 mA capability.

Availability

NCP585DSAN09T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, industrial handheld scanners, and low-power wireless transceivers requiring stable component supply across extended product lifecycles.

Supply support for NCP585DSAN09T1G 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NCP585 series belongs to onsemi's precision LDO portfolio designed specifically for battery-powered portable electronics demanding multi-mode efficiency, fast transient response, and robust thermal performance in miniature packages.

FAQ

What is the maximum input voltage rating for the NCP585DSAN09T1G?

The NCP585DSAN09T1G has an absolute maximum input voltage (V_IN) of 6.5 V. The recommended operating input range is 1.4 V to 6.0 V per electrical characteristics. Exceeding 6.5 V risks permanent damage; operation above 6.0 V may degrade long-term reliability even if within absolute max ratings. Always verify input source tolerance and transient spikes in final design.

How does the ECO pin affect the NCP585DSAN09T1G's quiescent current and transient response?

The ECO pin directly selects between Fast Transient (FT) and Low Power (LP) modes: V_ECO = V_IN enables FT mode (80 µA I_q, 40 mV load regulation), optimizing response to sudden load changes; V_ECO = GND enables LP mode (3.5 µA I_q, 15 mV load regulation), maximizing battery life. The NCP585DSAN09T1G must never operate with ECO floating - strict voltage-level control is required.

Does the NCP585DSAN09T1G require an external capacitor on the ECO pin?

No, the NCP585DSAN09T1G does not require an external capacitor on the ECO pin. The ECO pin is a digital control input with CMOS-compatible thresholds (V_THENH ≥ 1.0 V, V_THENL ≤ 0.3 V). Adding capacitance would delay mode transitions and potentially cause undefined behavior during power-up or mode switching. Drive ECO directly from a clean logic signal or resistor-divider as specified in the application information section.

What is the purpose of the NC pin (Pin 6) on the NCP585DSAN09T1G HSON-6 package?

Pin 6 of the NCP585DSAN09T1G is a No Connect (NC) terminal - internally unconnected and electrically isolated. It must remain unconnected in PCB layout; routing traces to it or applying solder paste risks mechanical stress on the bond wire or contamination-induced leakage. The NC designation is confirmed in the Pin Function Description table on page 3 of the datasheet and applies exclusively to this HSON-6 variant.

Can the NCP585DSAN09T1G be used with ceramic output capacitors?

Yes, the NCP585DSAN09T1G is stable with ceramic output capacitors, but the datasheet recommends 1.0 µF tantalum for optimal transient performance in FT mode. Ceramic capacitors with low ESR (≤10 mΩ) are acceptable if total output capacitance meets minimum 1.0 µF requirement and stability is verified across temperature and load per Figures 32–35. Avoid ultra-low-ESR ceramics without series resistance unless validated in target application.

NCP585DSAN09T1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: 6-VQFN Exposed Pad

Packaging:: Bulk

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 0.9V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.78V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 90 µA

Current - Supply (Max):: 111 µA

PSRR:: 75dB ~ 65dB (120Hz ~ 10kHz)

Control Features:: Enable

Protection Features:: Over Current

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 6-HSON (2.9x3)

NCP585DSAN09T1G FAQ

1.How can I place an order for NCP585DSAN09T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP585DSAN09T1G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for NCP585DSAN09T1G reliable?

The price and inventory of NCP585DSAN09T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP585DSAN09T1G is usually 5 days.

3.What payment methods are accepted for NCP585DSAN09T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP585DSAN09T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP585DSAN09T1G?

NCP585DSAN09T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP585DSAN09T1G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for NCP585DSAN09T1G?

For technical support, including NCP585DSAN09T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP585DSAN09T1G requirements.

6.How does Aetrix verify that NCP585DSAN09T1G is sourced from the original manufacturer or authorized distributors?

All NCP585DSAN09T1G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCP585DSAN09T1G meets industry standards.

7.What is the process for return or replacement of NCP585DSAN09T1G?

All NCP585DSAN09T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP585DSAN09T1G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The NCP585DSAN09T1G part is unused and in its original packaging.

Return procedure for NCP585DSAN09T1G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…