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onsemi NCP4587DSN18T1G
- Part No.:
- NCP4587DSN18T1G
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
NCP4587DSN18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,110
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Product details
Overview
NCP4587DSN18T1G from onsemi is a 150 mA tri-mode CMOS low-dropout linear voltage regulator with 1.8 V fixed output, operating from 1.4 V to 5.25 V input, ±1% output accuracy (at VOUT > 2 V), 120 mV typical dropout at 150 mA (for VOUT ≥ 2.6 V), and auto-switching between low-power mode (1.0 µA quiescent current) and fast-response mode (55 µA supply current). It serves as a power management IC in space-constrained portable electronics requiring stable low-noise bias for image sensors or RF front-ends.
For engineers reviewing the NCP4587DSN18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tri-mode operation (Auto Eco/Fast/Standby), SOT-23-5 package footprint, 1.8 V fixed output with ceramic-capacitor stability, and integrated output discharge function - critical for rapid power-down sequencing in battery-powered systems.
Technical Context
The NCP4587DSN18T1G implements a CMOS-based LDO architecture with an internal N-channel pass transistor, enabling ultra-low dropout and compatibility with ceramic output capacitors down to 1 µF. Its tri-mode control logic monitors load current in real time: it enters low-power mode below ~1–2 mA load and switches to fast mode above ~8 mA, or remains permanently in fast mode when the AE pin is held high.
It integrates a dedicated output discharge transistor (D-version feature), activated during shutdown to rapidly bleed stored charge from the output capacitor - reducing residual voltage hold-up time by >90% versus non-D variants. The CE pin provides active-high enable control with internal pull-down, while the AE pin selects between Auto Eco (floating or low) and forced Fast mode (high).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% (at TJ = 25°C, VOUT > 2 V); ensures precise bias for 1.8 V logic rails and analog sensor interfaces. |
| Max Output Current | 150 mA continuous; supports moderate-power peripherals like camera ISPs or BLE radios without thermal derating in SOT-23. |
| Dropout Voltage | 120 mV typ. at 150 mA (for VOUT ≥ 2.6 V); enables operation with <2.0 V input when regulating 1.8 V, extending battery runtime. |
| Quiescent Current | 1.0 µA in Low Power Mode; reduces standby power loss in always-on subsystems such as real-time clocks or wake-on-event circuits. |
| PSRR | 70 dB at 1 kHz (Fast Mode); suppresses ripple from noisy DC-DC converters feeding the LDO input, critical for noise-sensitive analog blocks. |
| Operating Input Range | 1.4 V to 5.25 V; accommodates single-cell Li-ion (2.7–4.2 V), LiFePO₄ (2.0–3.6 V), or regulated 3.3 V/5 V rails. |
| Thermal Resistance | RJA = 238 °C/W (SOT-23); allows ~150 mW dissipation at 85°C ambient before reaching 150°C max junction temperature. |
Pinout & Package
The NCP4587DSN18T1G is housed in a Pb-free SOT-23-5 package (Case 1212), with 0.95 mm pitch, 2.7 × 2.5 mm body, and exposed thermal pad not connected internally. Pin 1 is marked via dot; pin numbering follows standard SOT-23 orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 1.4–5.25 V input; requires local 1 µF ceramic decoupling to minimize line transients and EMI coupling. |
| GND (Pin 2) | Power ground reference | Common return path for VIN, VOUT, CE, and AE; must be low-impedance and tied directly to PCB ground plane. |
| CE (Pin 3) | Active-high chip enable | Drives regulator ON when ≥1.0 V; internal 0.1 µA pull-down ensures default OFF state if left unconnected. |
| VOUT (Pin 4) | Regulated output | Delivers stable 1.8 V; requires 1 µF ceramic output capacitor placed adjacent to pin for loop stability and transient response. |
| AE (Pin 5) | Auto Eco mode select | Low/floating → Auto Eco (low IQ); high (≥1.0 V) → forced Fast Mode (55 µA, improved load transient response). |
Key Features
| Feature | Design Value |
|---|---|
| Tri-mode operation | Automatically toggles between 1.0 µA low-power and 55 µA fast-response modes based on load current thresholds (IOUTL = 1–2 mA, IOUTH = 8 mA), optimizing efficiency vs. performance trade-off. |
| Integrated output discharge | Active NMOS switch between VOUT and GND discharges output capacitance during shutdown, eliminating external bleeder resistors and reducing system wake-up latency. |
| Ceramic capacitor stability | Stable with ≥1 µF X5R/X7R ceramic output caps (ESR < 10 mΩ); eliminates need for higher-ESR tantalum or aluminum electrolytics, saving board area and cost. |
| High PSRR in Fast Mode | 70 dB @ 1 kHz improves immunity to switching noise from upstream DC-DC converters, preserving signal integrity in mixed-signal SoC power domains. |
| ±1% output accuracy | Tight initial tolerance (VOUT > 2 V) and ±2.5% over −40°C to +85°C ensures reliable operation of 1.8 V I/O interfaces without margining overhead. |
Applications
| Smartphone Camera Module | Wearable Heart Rate Sensor |
|---|---|
Use Scenario: Powers CIS (CMOS Image Sensor) analog core and timing circuitry in compact smartphone rear cameras. IC Role / Device Role / Timing Role: Provides ultra-low-noise 1.8 V bias for pixel array readout and ADC reference, synchronized to exposure timing signals. Use Value: 115 µVrms output noise and 70 dB PSRR prevent image banding or fixed-pattern noise under RF interference or DC-DC switching. |
Use Scenario: Supplies photodiode amplifier and analog front-end in optical PPG (photoplethysmography) wearables. IC Role / Device Role / Timing Role: Delivers clean 1.8 V rail for transimpedance amplifier and ADC during intermittent LED pulse bursts. Use Value: Tri-mode operation cuts standby current to 1.0 µA between measurement cycles, extending coin-cell battery life beyond 6 months. |
| Bluetooth LE Audio Earbud | Industrial IoT Edge Node |
Use Scenario: Powers DSP and codec in ultra-thin true-wireless stereo earbuds with tight thermal constraints. IC Role / Device Role / Timing Role: Regulates 1.8 V for digital audio processing core and memory interface, responding to dynamic load changes during codec activation. Use Value: Fast-mode switching (≤8 mA threshold) maintains regulation during burst-mode DSP execution, avoiding brownout-induced audio artifacts. |
Use Scenario: Supplies 1.8 V to ultra-low-power microcontroller and LoRaWAN transceiver in battery-operated environmental sensor nodes. IC Role / Device Role / Timing Role: Acts as primary LDO for MCU VDD_IO and radio VCC, entering low-power mode during deep-sleep intervals. Use Value: Integrated output discharge ensures rapid VOUT collapse (<100 µs) upon MCU sleep command, preventing leakage into powered-down peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1804T-1802I/OT | Fixed 1.8 V, 150 mA, 1.6 µA IQ (no tri-mode), no output discharge, SOT-23-5 | Lacks auto-switching and discharge; simpler control but higher standby current and slower shutdown decay | Select when design prioritizes lowest BOM count over dynamic efficiency or fast power-down. |
| Torex XC6219B182MR-G | Fixed 1.8 V, 150 mA, 1.0 µA IQ, no tri-mode, no output discharge, SOT-23-5 | Matches low IQ but omits both AE-controlled fast mode and D-version discharge; lower PSRR (60 dB @ 1 kHz) | Choose for cost-sensitive, static-load applications where transient response and discharge are non-critical. |
Compared with MCP1804T-1802I/OT and XC6219B182MR-G, the NCP4587DSN18T1G uniquely combines tri-mode IQ optimization, integrated output discharge, and 70 dB PSRR - making it superior for battery-powered systems requiring both ultra-low standby power and robust dynamic performance during active bursts.
Availability
NCP4587DSN18T1G is available at Aetrix Electronics and suitable for portable medical devices, wireless audio endpoints, imaging modules, and industrial edge sensors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCP4587DSN18T1G 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, and sensing solutions for automotive, industrial, and consumer markets.
The NCP4587DSN18T1G belongs to the NCP4587 family of tri-mode LDOs designed specifically for ultra-low-power portable electronics where dynamic load profiles demand intelligent trade-offs between quiescent current and transient response.
FAQ
What is the output voltage tolerance of the NCP4587DSN18T1G over temperature?
The NCP4587DSN18T1G delivers ±1% output voltage accuracy at TJ = 25°C for VOUT > 2 V. Over the full operating range of −40°C to +85°C, the tolerance widens to ±2.5% (±1.5% for VOUT > 2 V, ±30 mV for VOUT ≤ 2 V). This ensures reliable 1.8 V rail integrity across environmental extremes in handheld and wearable deployments.
Does the NCP4587DSN18T1G require an external resistor to set output voltage?
No, the NCP4587DSN18T1G is a fixed-output regulator with factory-trimmed 1.8 V. It does not use external feedback resistors - simplifying layout, eliminating resistor tolerance errors, and reducing bill-of-materials count. All variants in the NCP4587 family are available in discrete fixed-voltage options from 0.8 V to 4.0 V.
How does the AE pin affect the NCP4587DSN18T1G's performance in battery-powered systems?
The AE pin on the NCP4587DSN18T1G determines operational mode: floating or low enables Auto Eco (1.0 µA IQ), while high (≥1.0 V) forces permanent Fast Mode (55 µA IQ, faster load transient recovery). In battery systems, tying AE to GND maximizes runtime during idle; connecting it to a GPIO allows firmware-controlled performance scaling.
Is the NCP4587DSN18T1G stable with 0.47 µF ceramic output capacitors?
Yes - the NCP4587DSN18T1G is specified and characterized for stability with 0.47 µF to 10 µF ceramic capacitors (X5R/X7R), per the Electrical Characteristics table (COUT = 0.47 µF test condition). Using 0.47 µF meets minimum stability requirements and reduces solution size, though 1 µF is recommended for optimal transient response.
What protection features are integrated into the NCP4587DSN18T1G?
The NCP4587DSN18T1G includes fold-back current limiting (50 mA short-circuit current), thermal shutdown (150°C junction limit), and reverse-current blocking. Its D-version also adds active output discharge during disable - a feature absent in most competing 150 mA LDOs and critical for deterministic power sequencing in multi-rail systems.
NCP4587DSN18T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 4 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
NCP4587DSN18T1G FAQ
1.How can I place an order for NCP4587DSN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4587DSN18T1G 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 NCP4587DSN18T1G reliable?
The price and inventory of NCP4587DSN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4587DSN18T1G is usually 5 days.
3.What payment methods are accepted for NCP4587DSN18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4587DSN18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4587DSN18T1G?
NCP4587DSN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4587DSN18T1G 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 NCP4587DSN18T1G?
For technical support, including NCP4587DSN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4587DSN18T1G requirements.
6.How does Aetrix verify that NCP4587DSN18T1G is sourced from the original manufacturer or authorized distributors?
All NCP4587DSN18T1G 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 NCP4587DSN18T1G meets industry standards.
7.What is the process for return or replacement of NCP4587DSN18T1G?
All NCP4587DSN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4587DSN18T1G, 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 NCP4587DSN18T1G part is unused and in its original packaging.
Return procedure for NCP4587DSN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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