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onsemi NCP4586SN33T1
- Part No.:
- NCP4586SN33T1
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
NCP4586SN33T1.pdf
- Description:
- IC REG LINEAR LDO
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Inventory:30,000
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Product details
Overview
NCP4586SN33T1 from onsemi is a CMOS low-dropout linear regulator delivering 150 mA output with 3.3 V fixed output voltage, ±1% accuracy at 25°C, 320 mV typical dropout at full load, and 80 dB PSRR at 1 kHz - designed for stable power in space-constrained portable electronics.
For engineers reviewing the NCP4586SN33T1 datasheet, pinout, applications, or equivalent options, key selection criteria include its SOT-23-5 package footprint, enable-active-high logic (CE pin), auto-discharge capability, and compatibility with 0.47 µF ceramic output capacitors without external compensation.
Technical Context
The NCP4586SN33T1 implements a CMOS pass transistor architecture with internal voltage reference and error amplifier, supporting input voltages from 1.7 V to 6.5 V while maintaining regulation down to 320 mV dropout at 150 mA. Its enable pin (CE) is active-high and includes an internal pull-down current source (0.4 µA typical).
It features current-foldback protection, operates across −40°C to +85°C ambient, and achieves 30 µVRMS output noise (10 Hz–100 kHz) at 1.2 V output - confirmed for the 3.3 V variant via family-wide noise characterization and thermal performance data (RJA = 238°C/W in SOT-23-5).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V, ±1% accuracy at 25°C ensures reliable logic-level supply for MCU I/O, sensors, and RF front-ends. |
| Max Output Current | 150 mA continuous - sufficient for powering single-core microcontrollers, PMIC rails, or analog signal chains. |
| Dropout Voltage | 320 mV typical at 150 mA (for VOUT ≥ 2.5 V) enables operation from 3.6 V Li-ion cells down to end-of-discharge (~3.3 V). |
| PSRR | 80 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters in mixed-signal systems. |
| Quiescent Current | 38–58 µA - minimizes battery drain in always-on monitoring circuits. |
| Enable Threshold | VCEH = 1.0 V min - compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Stability | Stable with ≥0.47 µF ceramic output capacitor - eliminates need for tantalum or large bulk capacitance. |
Pinout & Package
The NCP4586SN33T1 is housed in a Pb-free SOT-23-5 package (Case 1212), measuring 2.9 × 2.8 × 1.15 mm, with exposed pad not electrically connected. Thermal resistance is 238°C/W (junction-to-air), enabling 150 mA operation at up to +85°C ambient with minimal PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Accepts 1.7–6.5 V; requires 470 nF ceramic decoupling placed adjacent to pin for transient immunity. |
| 2 - GND | Power ground reference | Must be low-impedance; ties internal reference, error amp, and pass device substrate - shared with output capacitor ground. |
| 3 - CE | Enable control input (active-high) | Drives regulator ON when ≥1.0 V; internal 0.4 µA pull-down holds OFF during floating or high-Z states. |
| 4 - NC | No connection | Internally unconnected; must remain unpopulated and unconnected on PCB to avoid parasitic coupling. |
| 5 - VOUT | Regulated output | Delivers 3.3 V ±1%; requires 470 nF ceramic capacitor directly between this pin and GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30 µVRMS output noise (10 Hz–100 kHz) - preserves SNR in ADC references and RF bias rails. |
| Auto-output discharge | Integrated N-channel discharge transistor activates on disable - clears VOUT within 100 µs (typ.) to prevent back-powering. |
| High PSRR | 80 dB @ 1 kHz, >60 dB @ 100 kHz - rejects ripple from switching regulators feeding VIN. |
| Ultra-low quiescent current | 38–58 µA operating current - extends battery life in IoT endpoints with infrequent wake cycles. |
| Thermal shutdown & foldback | Current-limit folds back above 40 mA short-circuit; thermal shutdown engages at TJ > +150°C - protects IC and system under fault. |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Powering optical heart-rate sensor (PPG) and low-power MCU in wrist-worn device with coin-cell or small Li-po battery. IC Role / Device Role: Primary 3.3 V rail regulator supplying analog front-end and digital core, with fast enable/disable synchronized to sensor sampling. Use Value: Auto-discharge prevents residual charge from interfering with next measurement cycle; 30 µVRMS noise avoids corrupting µV-level photodiode signals. |
Use Scenario: Providing clean, stable 3.3 V to accelerometer, BLE SoC, and OLED display driver in compact wearable form factor. IC Role / Device Role: Main system LDO with GPIO-controlled enable, supporting ultra-low-power sleep modes and rapid wake-up. Use Value: 38 µA quiescent current extends 7-day battery life; 320 mV dropout allows full utilization of 3.6 V Li-ion cell down to 3.3 V cutoff. |
| Industrial Handheld Scanners | Smart Home Sensor Hubs |
Use Scenario: Regulating power for laser diode driver, image sensor, and ARM Cortex-M microcontroller in battery-operated barcode scanner. IC Role / Device Role: Secondary LDO generating precision 3.3 V rail from main 5 V DC-DC output, rejecting switching noise. Use Value: 80 dB PSRR at 1 kHz attenuates DC-DC ripple, preventing image artifacts and timing jitter in high-speed serial interfaces. |
Use Scenario: Supplying 3.3 V to Zigbee/Thread radio, environmental sensors (temp/humidity/pressure), and flash memory in always-on hub. IC Role / Device Role: Always-on LDO with standby current <1 µA (ISTB), enabling real-time sensor polling without waking host processor. Use Value: Standby current of 0.1–1 µA maintains RTC and interrupt logic while drawing negligible energy from backup coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | 300 mA rating, 6 µA quiescent current, no auto-discharge, SOT-23-3 package (3-pin, no CE) | Lacks enable control and output discharge - requires external MOSFET or resistor network for sequencing. | Choose when ultra-low IQ dominates requirements and enable/discharge are handled externally. |
| Torex XC6219B332MR-G | 150 mA, 25 µA IQ, 200 mV dropout at 100 mA, SC-82AB package, no auto-discharge | Lower dropout but lacks integrated discharge path - slower VOUT decay may cause latch-up in downstream logic. | Prefer when board space permits SC-82AB and discharge is managed by system-level reset controller. |
Compared with MCP1700T-3302E/MB and XC6219B332MR-G, the NCP4586SN33T1 uniquely combines 3.3 V precision regulation, active-high enable, and auto-discharge in a 5-pin SOT-23 - eliminating external components for safe power sequencing in battery-powered edge devices.
Availability
NCP4586SN33T1 is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial handheld scanners, smart home sensor hubs, and battery-powered IoT endpoints requiring stable component supply with guaranteed long-term sourcing.
Supply support for NCP4586SN33T1 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, sensing, and connectivity solutions.
The NCP4586SN33T1 belongs to the NCP4586 family of low-noise, low-IQ LDOs engineered specifically for battery-powered portable equipment where size, efficiency, and signal integrity are critical.
FAQ
What is the maximum input voltage rating for the NCP4586SN33T1?
The NCP4586SN33T1 has an absolute maximum input voltage of 7 V. Operation beyond this risks permanent damage. For reliable continuous use, the recommended input range is 1.7 V to 6.5 V - ensuring proper regulation and thermal margin across all load and temperature conditions specified in the datasheet.
Does the NCP4586SN33T1 require an external capacitor on the CE pin for noise immunity?
No, the NCP4586SN33T1 does not require an external capacitor on the CE pin. Its enable input includes internal hysteresis and is designed to tolerate standard PCB-level noise. However, routing the CE trace away from noisy signals (e.g., switching node, clock lines) and using a short, direct connection to the controlling GPIO is recommended for robust operation.
Can the NCP4586SN33T1 be used with a 1 µF ceramic output capacitor instead of the recommended 0.47 µF?
Yes, the NCP4586SN33T1 remains stable with a 1 µF ceramic output capacitor - and in fact benefits from improved transient response and lower output impedance. The 0.47 µF minimum is validated for stability; larger values (up to 10 µF) are acceptable and commonly used to enhance load-step performance without compromising phase margin.
Is the NC pin (Pin 4) on the NCP4586SN33T1 internally connected or should it be left floating?
Pin 4 (NC) on the NCP4586SN33T1 is internally unconnected and must remain unpopulated and electrically floating on the PCB. Connecting it to any net - including GND or VIN - may introduce parasitic coupling or leakage paths that degrade noise performance or cause unexpected behavior during thermal or ESD events.
How does the auto-discharge function operate in the NCP4586SN33T1 during shutdown?
When the CE pin is driven low, the NCP4586SN33T1 disables the pass transistor and activates an internal N-channel discharge switch between VOUT and GND. This discharges the output capacitor rapidly - typically clearing 3.3 V to <100 mV within 100 µs - preventing back-powering of upstream circuitry or unintended wake-up of downstream ICs.
NCP4586SN33T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
NCP4586SN33T1 FAQ
1.How can I place an order for NCP4586SN33T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4586SN33T1 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 NCP4586SN33T1 reliable?
The price and inventory of NCP4586SN33T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4586SN33T1 is usually 5 days.
3.What payment methods are accepted for NCP4586SN33T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4586SN33T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4586SN33T1?
NCP4586SN33T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4586SN33T1 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 NCP4586SN33T1?
For technical support, including NCP4586SN33T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4586SN33T1 requirements.
6.How does Aetrix verify that NCP4586SN33T1 is sourced from the original manufacturer or authorized distributors?
All NCP4586SN33T1 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 NCP4586SN33T1 meets industry standards.
7.What is the process for return or replacement of NCP4586SN33T1?
All NCP4586SN33T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP4586SN33T1, 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 NCP4586SN33T1 part is unused and in its original packaging.
Return procedure for NCP4586SN33T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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