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

onsemi NCP585HSAN12T1G

Name: NCP585HSAN12T1G
Brand: onsemi
SKU: NCP585HSAN12T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP585HSAN12T1G

Manufacturer:: onsemi

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

Package:: 6-VQFN Exposed Pad

Datasheet:: NCP585HSAN12T1G.pdf

Description:: IC REG LINEAR 1.2V 300MA 6HSON

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Product details

Overview

NCP585HSAN12T1G from onsemi is a tri-mode 300 mA CMOS low-dropout regulator with enable and ECO pin for mode selection, delivering a fixed 1.2 V output. It supports Chip Enable (CE), Fast Transient (FT), and Low Power (LP) modes, features 310 mV dropout at 300 mA (FT mode), ±2% output accuracy, and 70 dB PSRR at 1 kHz - optimized for portable battery-powered systems requiring stable low-voltage rail generation.

For engineers reviewing the NCP585HSAN12T1G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, real-world design meaning of key specs, validated HSON−6 package details, and two confirmed alternative parts with functional and application-level differences.

Technical Context

The NCP585HSAN12T1G implements a CMOS-based LDO architecture with three configurable operating modes controlled via the ECO pin: CE mode (enable/disable), FT mode (VECO = Vin, optimized for transient response), and LP mode (VECO = GND, ultra-low I_q). Its internal reference and error amplifier maintain tight regulation across load (1–300 mA in FT mode) and line (1.4–6.0 V input) variations.

It integrates fold-back current limiting, auto-discharge capability (in active-high variants), and thermal shutdown. The device operates over −40°C to +85°C ambient, supports input up to 6.5 V, and requires only a 1.0 µF ceramic output capacitor for stability in both FT and LP modes - with no unstable region observed in LP mode per ESR vs. load plots.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2 V ±2% (FT mode); ±3% (LP mode) - ensures precise core voltage for 1.2 V logic rails without external feedback.
Max Output Current	300 mA - sufficient to power microcontrollers, sensors, or RF front-ends in space-constrained portable designs.
Dropout Voltage	310 mV @ 300 mA (FT mode, V_OUT = 1.2 V) - enables operation from single-cell Li-ion (3.0 V min) or dual-cell alkaline (2.4 V min) sources.
Quiescent Current	80 µA (FT mode, V_OUT < 1.8 V); 3.5 µA (LP mode, V_OUT < 1.6 V) - extends battery life in sleep/standby states without sacrificing wake-up speed.
PSRR	70 dB @ 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input, critical for analog/RF subsystems.
Line Regulation	0.01%/V (FT mode) - maintains output stability despite battery voltage sag during high-current pulses.
Load Regulation	15 mV (FT mode, 1–300 mA) - minimizes voltage droop during dynamic processor load transitions.

Pinout & Package

HSON−6 (Case 506AE) package: 3.0 mm × 3.0 mm × 0.9 mm body, exposed thermal pad, Pb-free, moisture-sensitive level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 - Vin	Input power supply	Accepts 1.4–6.5 V; requires 1.0 µF ceramic decoupling close to pin to ensure stability and noise immunity.
2 - NC	No connect	Internally unconnected; must remain floating - no routing or grounding permitted.
3 - Vout	Regulated output	Delivers fixed 1.2 V; connects directly to load; output capacitor must be placed adjacent to this pin.
4 - ECO	Mode control input	Drives FT mode when tied to Vin; LP mode when grounded - selects trade-off between transient response and quiescent current.
5 - GND	Power ground	Primary return path; must be connected to low-impedance system ground plane beneath exposed pad.
6 - CE	Active-high enable	High = enabled (regulation active); low = shutdown (I_SD = 0.1 µA); compatible with standard GPIO logic levels.

Key Features

Feature	Design Value
Tri-mode operation	Single device supports three distinct power states: full-performance (FT), ultra-low-power (LP), and on/off control (CE) - eliminates need for multiple regulators in multi-sleep-state systems.
Low temperature drift	100 ppm/°C output voltage drift - ensures consistent 1.2 V rail across industrial temperature range without calibration.
Fold-back protection	Current limit reduces to ~50 mA under short-circuit - prevents thermal runaway and enables safe recovery after fault removal.
Auto-discharge support	Active-high variant includes internal discharge path from Vout to GND when disabled - clears residual charge to meet fast-power-down requirements.
High ripple rejection	75 dB @ 120 Hz, 70 dB @ 1 kHz - effectively filters low-frequency noise from battery chargers or buck converter ripple.

Applications

Portable Medical Sensors	Wearable Fitness Trackers
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE MCU and analog front-end operating from coin-cell battery. IC Role / Device Role / Timing Role: Primary 1.2 V supply for ARM Cortex-M0+ MCU core and ADC reference, dynamically switching between FT mode (during measurement) and LP mode (between readings). Use Value: 3.5 µA quiescent current in LP mode extends 220 mAh CR2032 battery life beyond 6 months; 310 mV dropout allows full utilization of battery's 2.0–3.0 V discharge curve.	Use Scenario: Optical heart-rate sensor module with photodiode array, LED drivers, and BLE SoC in wrist-worn form factor. IC Role / Device Role / Timing Role: Stable 1.2 V rail for precision analog signal chain and digital logic, using CE pin to synchronize power gating with motion-detection interrupts. Use Value: 70 dB PSRR isolates sensitive analog measurements from digital switching noise; HSON−6 footprint (3.0 × 3.0 mm) fits tight board area constraints.
Industrial Handheld Scanners	Smart Home Motion Sensors
Use Scenario: Rugged barcode scanner with laser diode driver, image sensor, and Wi-Fi MCU powered by 2×AA batteries. IC Role / Device Role / Timing Role: Main 1.2 V supply enabling fast wake-from-sleep (<10 µs turn-on time per Figure 30) to capture barcode scans on demand. Use Value: 80 µA I_q in FT mode balances responsiveness and battery longevity; 15 mV load regulation prevents sensor data corruption during motor-triggered current surges.	Use Scenario: PIR-based occupancy sensor with ultra-low-power MCU and Zigbee radio operating for >5 years on AA batteries. IC Role / Device Role / Timing Role: Always-on 1.2 V supply for PIR signal conditioning and wake-up circuitry, with LP mode engaged 99.9% of time. Use Value: 3.5 µA I_q enables >5-year battery life; no external components required for mode control - ECO pin hardwired to GND.

Portable Medical Sensors

Wearable Fitness Trackers

Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE MCU and analog front-end operating from coin-cell battery.

IC Role / Device Role / Timing Role: Primary 1.2 V supply for ARM Cortex-M0+ MCU core and ADC reference, dynamically switching between FT mode (during measurement) and LP mode (between readings).

Use Value: 3.5 µA quiescent current in LP mode extends 220 mAh CR2032 battery life beyond 6 months; 310 mV dropout allows full utilization of battery's 2.0–3.0 V discharge curve.

Use Scenario: Optical heart-rate sensor module with photodiode array, LED drivers, and BLE SoC in wrist-worn form factor.

IC Role / Device Role / Timing Role: Stable 1.2 V rail for precision analog signal chain and digital logic, using CE pin to synchronize power gating with motion-detection interrupts.

Use Value: 70 dB PSRR isolates sensitive analog measurements from digital switching noise; HSON−6 footprint (3.0 × 3.0 mm) fits tight board area constraints.

Industrial Handheld Scanners

Smart Home Motion Sensors

Use Scenario: Rugged barcode scanner with laser diode driver, image sensor, and Wi-Fi MCU powered by 2×AA batteries.

IC Role / Device Role / Timing Role: Main 1.2 V supply enabling fast wake-from-sleep (<10 µs turn-on time per Figure 30) to capture barcode scans on demand.

Use Value: 80 µA I_q in FT mode balances responsiveness and battery longevity; 15 mV load regulation prevents sensor data corruption during motor-triggered current surges.

Use Scenario: PIR-based occupancy sensor with ultra-low-power MCU and Zigbee radio operating for >5 years on AA batteries.

IC Role / Device Role / Timing Role: Always-on 1.2 V supply for PIR signal conditioning and wake-up circuitry, with LP mode engaged 99.9% of time.

Use Value: 3.5 µA I_q enables >5-year battery life; no external components required for mode control - ECO pin hardwired to GND.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
NCP114AMX12TBG	Fixed 1.2 V, 150 mA, SOT-23-5, 220 mV dropout @ 150 mA, 45 µA I_q (typ)	Limited current capacity and no tri-mode control - suitable only for low-power peripherals, not main MCU rails.	Select when board space is constrained and load never exceeds 150 mA; verify thermal margin with 250 mW PD limit.
MCP1804T-1202I/OT	Fixed 1.2 V, 150 mA, SOT-23-5, 350 mV dropout @ 150 mA, 3 µA I_q (LP), no ECO pin or FT mode	Only two modes (on/off); lacks fast-transient capability and higher current drive - best for static low-power loads.	Choose for cost-sensitive designs where dynamic load response is unnecessary and 150 mA suffices.

Compared with NCP585HSAN12T1G, NCP114AMX12TBG offers smaller footprint but half the current and no mode flexibility, while MCP1804T-1202I/OT achieves lower I_q yet sacrifices transient performance and output drive - making NCP585HSAN12T1G the only option supporting 300 mA + tri-mode optimization in HSON−6.

Availability

NCP585HSAN12T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP585HSAN12T1G 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 NCP585HSAN12T1G belongs to the NCP585 series of tri-mode LDOs designed specifically for battery-powered portable equipment demanding simultaneous low I_q, fast transient response, and high accuracy - addressing the conflicting needs of runtime and performance in modern wearables and IoT edge devices.

FAQ

What is the maximum input voltage rating for the NCP585HSAN12T1G?

The NCP585HSAN12T1G has an absolute maximum input voltage (Vin) rating of 6.5 V. Operation above this level risks permanent damage. For reliable continuous use, the recommended input range is 1.4 V to 6.0 V per electrical characteristics tables. This allows compatibility with single-cell Li-ion (up to 4.2 V), dual-cell alkaline (up to 3.2 V), and regulated 5 V supplies - all while maintaining 1.2 V output regulation.

Does the NCP585HSAN12T1G require an external capacitor on the ECO pin?

No, the NCP585HSAN12T1G does not require an external capacitor on the ECO pin. The ECO pin is a digital control input that selects operating mode: connecting it to Vin enables Fast Transient (FT) mode, while grounding it enables Low Power (LP) mode. The datasheet specifies no AC loading or filtering requirement for ECO; it is intended for DC bias only, and adding capacitance could delay mode transitions or cause unintended behavior during power-up.

Can the NCP585HSAN12T1G be used with ceramic output capacitors?

Yes, the NCP585HSAN12T1G is fully compatible with ceramic output capacitors. The datasheet explicitly recommends a 1.0 µF ceramic capacitor on the Vout pin for optimal stability and transient response. Stability analysis (Figures 32–35) confirms stable operation across load currents up to 300 mA with ceramic capacitors ranging from 0.1 µF to 100 µF - provided ESR remains within the stable region (typically <100 mΩ for 1.0 µF). No series resistor is needed.

What is the shutdown current of the NCP585HSAN12T1G when the CE pin is low?

When the CE pin is driven low (≤0.3 V), the NCP585HSAN12T1G enters shutdown mode with a typical shutdown current (I_SD) of 0.1 µA and a maximum of 1.0 µA over temperature. This ultra-low leakage preserves battery energy during extended idle periods. The CE pin is actively driven - no pull-down resistor is required, and the device guarantees full disablement even at V_IN = 6.5 V, as confirmed in the Maximum Ratings table.

Is the NCP585HSAN12T1G pin-compatible with other variants in the NCP585 family?

Yes, the NCP585HSAN12T1G is pin-compatible with all HSON−6 variants in the NCP585 family (e.g., NCP585HSAN09T1G, NCP585HSAN18T1G), sharing identical pinout, package dimensions, and thermal pad layout. Voltage variants differ only in internal feedback network and marking - allowing drop-in replacement across 0.9 V to 3.3 V outputs without PCB changes, provided input voltage and load requirements remain within spec.

NCP585HSAN12T1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: 6-VQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 1.2V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.7V @ 300mA

Current - Output:: 300mA

Current - Quiescent (Iq):: 90 µA

Current - Supply (Max):: 111 µA

PSRR:: -

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)

NCP585HSAN12T1G FAQ

1.How can I place an order for NCP585HSAN12T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP585HSAN12T1G 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 NCP585HSAN12T1G reliable?

The price and inventory of NCP585HSAN12T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP585HSAN12T1G is usually 5 days.

3.What payment methods are accepted for NCP585HSAN12T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP585HSAN12T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP585HSAN12T1G?

NCP585HSAN12T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP585HSAN12T1G 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 NCP585HSAN12T1G?

For technical support, including NCP585HSAN12T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP585HSAN12T1G requirements.

6.How does Aetrix verify that NCP585HSAN12T1G is sourced from the original manufacturer or authorized distributors?

All NCP585HSAN12T1G 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 NCP585HSAN12T1G meets industry standards.

7.What is the process for return or replacement of NCP585HSAN12T1G?

All NCP585HSAN12T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP585HSAN12T1G, 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 NCP585HSAN12T1G part is unused and in its original packaging.

Return procedure for NCP585HSAN12T1G:

1.Submit a request within 90 days.

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

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