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onsemi NCP585LSAN18T1G
- Part No.:
- NCP585LSAN18T1G
- Manufacturer:
- onsemi
- Package:
- 6-VQFN Exposed Pad
- Datasheet:
-
NCP585LSAN18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 6HSON
- Quantity:
- Payment:
- Shipping:
Inventory:14,970
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Product details
Overview
NCP585LSAN18T1G from onsemi is an active-low enable, tri-mode 300 mA CMOS low-dropout regulator delivering a fixed 1.8 V output with ±2% accuracy in HSON−6 package. It supports Chip Enable (CE), Fast Transient (FT), and Low Power (LP) modes via the ECO pin, features 310 mV dropout at 300 mA (FT mode), 70 dB PSRR at 1 kHz, and ultra-low 60 µA quiescent current in FT mode - ideal for battery-powered portable instrumentation requiring stable low-voltage rail generation.
For engineers reviewing the NCP585LSAN18T1G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, mode-specific electrical behavior, package-validated pin functions, real-world use cases in handheld equipment, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The NCP585LSAN18T1G implements a CMOS-based LDO architecture with three configurable operating modes: CE mode (standard enable), FT mode (optimized for transient response and 60 µA Iq), and LP mode (3.5 µA Iq, relaxed load regulation). Mode selection is controlled exclusively by the ECO pin voltage relative to GND or Vin.
Its internal design includes foldback current limiting, auto-discharge capability (in active-high variants only - not applicable to NCP585LSAN18T1G), and a precision bandgap reference with 100 ppm/°C temperature coefficient. Input voltage range is 1.4 V to 6.0 V, supporting single-cell Li-ion and multi-cell alkaline/battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% (FT mode); ±3% (LP mode) - ensures stable core logic supply for 1.8 V microcontrollers and sensors. |
| Max Output Current | 300 mA continuous - sufficient for powering SoCs, RF transceivers, or multiple peripherals in portable devices. |
| Dropout Voltage | 310 mV @ 300 mA (ECO = Vin, FT mode) - enables operation down to ~2.11 V input for 1.8 V output, extending battery runtime. |
| Quiescent Current | 60 µA @ Vout = 1.8 V, FT mode; 4.5 µA @ LP mode - critical for low-power sleep states in always-on sensor nodes. |
| PSRR | 70 dB @ 1 kHz, 50 mA load - suppresses switching noise from DC-DC converters feeding the LDO input. |
| Line Regulation | 0.01%/V (FT mode) - maintains tight output stability across varying battery voltage (e.g., 3.0 V → 2.4 V discharge). |
| Load Regulation | 15 mV (FT mode, 1–300 mA) - limits output sag during dynamic processor load changes. |
| Operating Temp | −40°C to +85°C ambient - qualified for industrial-grade portable equipment deployment. |
Pinout & Package
HSON−6 (Case 506AE) package: 2.9 mm × 3.0 mm × 0.7–0.9 mm body height, exposed thermal pad, Pb-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Main power input (1.4–6.0 V); requires 1.0 µF ceramic decoupling to GND per datasheet recommendation. |
| 2 | GND | Power ground reference; connects to PCB ground plane and exposed thermal pad for thermal dissipation. |
| 3 | CE | Active-low chip enable: pulls output to high-impedance when driven low; threshold VTHL = 0.3 Vin. |
| 4 | ECO | Mode control: tie to Vin for FT mode (60 µA Iq, fast transient response); tie to GND for LP mode (4.5 µA Iq, relaxed regulation). |
| 5 | Vout | Regulated 1.8 V output; requires 1.0 µF low-ESR capacitor placed adjacent to pin per layout guidelines. |
| 6 | NC | No connect - internally unconnected; must remain floating or grounded (not driven). |
Key Features
| Feature | Design Value |
|---|---|
| Tri-mode operation | Hardware-selectable CE, FT, and LP modes via ECO pin - eliminates need for external mode-control logic or firmware intervention. |
| Ultra-low shutdown current | 0.1 µA max when CE = high - preserves battery charge during extended system sleep or storage. |
| High PSRR at 1 kHz | 70 dB - effectively filters ripple from upstream switching regulators without additional LC filtering. |
| Precision output accuracy | ±2% over line/load/temp - meets tight tolerance requirements of 1.8 V I/O and core rails in modern MCUs. |
| Foldback current protection | Short-circuit current limited to ~50 mA - prevents thermal runaway and enables safe fault recovery in portable designs. |
Applications
| Portable Medical Sensors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Battery-powered glucose meter with Bluetooth LE MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 1.8 V supply for MCU core, BLE radio, and ADC reference. Use Value: FT mode delivers fast load transient response during radio transmit bursts while maintaining <15 mV output deviation. |
Use Scenario: Rugged barcode scanner using ARM Cortex-M4 with integrated LCD driver. IC Role / Device Role / Timing Role: Stable 1.8 V rail for MCU I/O bank and display interface logic. Use Value: ±2% output accuracy ensures reliable level-shifting between 1.8 V logic and 3.3 V peripherals across −40°C to +85°C. |
| Wearable Fitness Trackers | Low-Power IoT Edge Nodes |
Use Scenario: Coin-cell–powered activity monitor with accelerometer and BLE SoC. IC Role / Device Role / Timing Role: Main 1.8 V supply enabling deep-sleep current <1 µA system-wide. Use Value: LP mode reduces Iq to 4.5 µA, extending coin-cell life beyond 12 months in typical usage. |
Use Scenario: Battery-operated environmental sensor node transmitting data hourly via LoRaWAN. IC Role / Device Role / Timing Role: Regulated 1.8 V source for ultra-low-power MCU and analog sensor interface. Use Value: 310 mV dropout allows operation until battery reaches 2.11 V, maximizing usable capacity of 2.4–3.0 V Li-SOCl₂ cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117ST18T3G | Fixed 1.8 V, 1 A output, SOT-223 package, 1.2 V dropout min, 8 mA Iq, no tri-mode control. | Higher current and thermal margin but lacks low-Iq modes; unsuitable for sub-10 µA sleep systems. | Select when higher output current (>300 mA) or better thermal performance is required, and ultra-low Iq is not critical. |
| MCP1702T-1802E/MB | Fixed 1.8 V, 250 mA, SOT-23-5, 4 µA Iq, no ECO pin or FT/LP modes; 600 mV dropout @ 250 mA. | Simpler single-mode operation; lower Iq than NCP585LSAN18T1G LP mode but significantly higher dropout. | Select for cost-sensitive, low-complexity designs where 300 mA current and fast transient response are not required. |
Compared with NCP1117ST18T3G and MCP1702T-1802E/MB, the NCP585LSAN18T1G uniquely balances 300 mA capability, 310 mV ultra-low dropout, and hardware-selectable 4.5–60 µA quiescent current - making it optimal for space-constrained, battery-life–critical portable systems needing both performance and efficiency.
Availability
NCP585LSAN18T1G is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld scanners, and wearable fitness trackers requiring stable component supply with guaranteed long-term manufacturability and Pb-free compliance.
Supply support for NCP585LSAN18T1G 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP585 series was designed specifically for portable battery-powered applications demanding precise voltage accuracy, ultra-low quiescent current, and high ripple rejection - targeting handheld instrumentation, camcorders, and compact embedded systems.
FAQ
What is the function of the ECO pin on the NCP585LSAN18T1G?
The ECO pin on the NCP585LSAN18T1G selects between Fast Transient (FT) mode and Low Power (LP) mode: connecting ECO to Vin activates FT mode (60 µA Iq, 15 mV load regulation), while connecting ECO to GND activates LP mode (4.5 µA Iq, 30 mV load regulation). This hardware-based mode switching enables dynamic power optimization without firmware overhead. The NCP585LSAN18T1G does not support auto-discharge functionality, which is exclusive to active-high variants like NCP585DSAN18T1G.
Does the NCP585LSAN18T1G support active-high enable?
No, the NCP585LSAN18T1G features active-low enable (CE pin), meaning the regulator is enabled when CE is pulled low and disabled when CE is high. Its marking suffix "L" explicitly denotes active-low logic. For active-high enable, designers must select variants such as NCP585DSAN18T1G (active-high with auto-discharge) or NCP585HSAN18T1G (active-high without auto-discharge). Pin compatibility is maintained across HSON−6 variants, but enable polarity and mode features differ.
What is the maximum input voltage rating for the NCP585LSAN18T1G?
The absolute maximum input voltage for the NCP585LSAN18T1G is 6.5 V, but the recommended operating input voltage range is 1.4 V to 6.0 V per the Electrical Characteristics table. Operation above 6.0 V risks exceeding safe junction temperature or violating internal bias conditions, especially under full load. For 1.8 V output, minimum valid input is 2.11 V in FT mode (1.8 V + 310 mV dropout), ensuring regulation across the usable battery discharge curve.
Can the NCP585LSAN18T1G be used with ceramic output capacitors?
Yes, the NCP585LSAN18T1G is stable with 1.0 µF ceramic output capacitors, as confirmed in the Application Information section and Figure 32–35 stability plots. The datasheet recommends low-ESR ceramics and specifies stable operation down to 0.1 µF (with defined ESR constraints per load current). Tantalum capacitors (1.0 µF) are also validated, but aluminum electrolytics are not recommended due to higher ESR and potential instability.
Is the NC pin on the NCP585LSAN18T1G required to be left floating?
Pin 6 of the NCP585LSAN18T1G is marked NC (No Connect) and is internally unconnected. It must not be driven or tied to any voltage; however, it may be connected to GND for mechanical stability or thermal conduction if needed - provided no signal routing or active driving occurs. Leaving it floating is acceptable, but grounding improves thermal performance slightly via the exposed pad connection path.
NCP585LSAN18T1G 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.48V @ 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)
NCP585LSAN18T1G FAQ
1.How can I place an order for NCP585LSAN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP585LSAN18T1G 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 NCP585LSAN18T1G reliable?
The price and inventory of NCP585LSAN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP585LSAN18T1G is usually 5 days.
3.What payment methods are accepted for NCP585LSAN18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP585LSAN18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP585LSAN18T1G?
NCP585LSAN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP585LSAN18T1G 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 NCP585LSAN18T1G?
For technical support, including NCP585LSAN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP585LSAN18T1G requirements.
6.How does Aetrix verify that NCP585LSAN18T1G is sourced from the original manufacturer or authorized distributors?
All NCP585LSAN18T1G 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 NCP585LSAN18T1G meets industry standards.
7.What is the process for return or replacement of NCP585LSAN18T1G?
All NCP585LSAN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP585LSAN18T1G, 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 NCP585LSAN18T1G part is unused and in its original packaging.
Return procedure for NCP585LSAN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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