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onsemi NCP511SN28T1
- Part No.:
- NCP511SN28T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP511SN28T1.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,971
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Product details
Overview
NCP511SN28T1 from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 2.8 V at up to 150 mA with ultra-low 40 µA quiescent current and 100 mV dropout at 100 mA. It integrates PMOS pass transistor, thermal shutdown, current limit, and enable control - designed for battery-powered portable instruments requiring stable low-power biasing.
For engineers reviewing the NCP511SN28T1 datasheet, pinout, applications, or equivalent options, key selection criteria include output accuracy (±2.0%), industrial temperature range (−40°C to +85°C), TSOP-5 package compatibility, and ceramic capacitor stability with ≥1.0 µF output capacitance.
Technical Context
The NCP511SN28T1 uses a PMOS pass transistor architecture enabling low dropout and near-zero reverse current during shutdown. Its internal error amplifier maintains regulation across line (0–6.0 V input) and load (1–150 mA) variations with <0.8 mV/mA load regulation and <3.5 mV/V line regulation.
Enable functionality provides logic-level control (VTH(HI) = 1.3 V, VTH(LO) = 0.3 V) for system power sequencing; the N/C pin (Pin 4) confirms non-connection in this variant, eliminating routing ambiguity in layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V ±2.0% (ensures stable MCU core or sensor bias within tolerance over −40°C to +85°C) |
| Max Output Current | 150 mA (supports single-rail microcontrollers or low-power RF modules) |
| Dropout Voltage | 100 mV at 100 mA (enables operation down to Vin = 2.9 V, extending battery runtime) |
| Quiescent Current | 40 µA typical (minimizes standby drain in always-on sensor nodes) |
| Input Voltage Range | 0 to 6.0 V (compatible with Li-ion, 2xAA, or regulated intermediate rails) |
| Ripple Rejection | 50 dB at 1 kHz (suppresses switching noise from upstream DC/DC converters) |
| Thermal Shutdown | Activates at ~160°C (protects against PCB overheating during sustained 150 mA loads) |
Pinout & Package
The NCP511SN28T1 is housed in a 5-pin TSOP-5 surface-mount package (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), optimized for space-constrained portable designs and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply (0–6.0 V); requires local 1.0 µF decoupling per layout guidelines |
| 2 | GND | Power ground reference; must be low-impedance connection to minimize noise coupling |
| 3 | Enable | Active-high digital control (logic high ≥1.3 V enables regulation; low ≤0.3 V disables output) |
| 4 | N/C | No internal connection - left unconnected or grounded per PCB design rules (no electrical function) |
| 5 | Vout | Regulated 2.8 V output; supports ceramic capacitors ≥1.0 µF with ESR up to 3.0 Ω |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >1-year battery life in 10 µA sleep-mode IoT sensors |
| Low dropout voltage | 100 mV at 100 mA allows operation from partially discharged 3.0 V batteries |
| High output accuracy | ±2.0% over temperature ensures reliable ADC reference or PLL VCO biasing |
| Integrated protection | Current limit (200–800 mA depending on Vin) and thermal shutdown prevent field failures |
| Ceramic capacitor compatible | Stable with ≥1.0 µF X5R/X7R MLCCs - eliminates need for costly tantalum or polymer caps |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
Use Scenario: Continuous glucose monitor using coin-cell battery and low-power analog front-end. IC Role / Device Role / Timing Role: Provides clean, low-noise 2.8 V bias to op-amps and ADC without loading battery during sleep cycles. Use Value: 40 µA IQ extends operational life beyond 18 months on CR2032; ±2.0% accuracy maintains measurement repeatability. | Use Scenario: Ruggedized multimeter powered by 2×AA alkaline cells with auto-ranging circuitry. IC Role / Device Role / Timing Role: Regulates 2.8 V rail for microcontroller, display driver, and precision voltage reference. Use Value: 100 mV dropout sustains regulation until battery drops to 2.9 V; TSOP-5 footprint saves board area in compact enclosure. |
| Wireless Sensor Nodes | Automotive Body Control Modules |
Use Scenario: Zigbee-enabled temperature/humidity node operating on primary lithium battery. IC Role / Device Role / Timing Role: Supplies 2.8 V to RF transceiver and microcontroller during periodic wake-up bursts. Use Value: Enable pin synchronizes power with radio activity, reducing average current to <1 µA in deep-sleep mode. | Use Scenario: Door module with LED indicators, window motor drivers, and LIN interface. IC Role / Device Role / Timing Role: Powers 2.8 V logic rail for MCU and CAN/LIN transceivers in cold-cranking conditions. Use Value: −40°C to +85°C rating ensures startup at −40°C; 6.0 V max input tolerates load-dump transients up to 5.5 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 4.0 µA IQ, 600 mV dropout at 250 mA, SOT-23-3 package (no enable) | Lacks enable pin and thermal shutdown; lower IQ but higher dropout limits battery depth-of-discharge | Select when minimal quiescent draw dominates over protection features and sequencing control |
| Torex XC6206P282MR-G | 1.0 µA IQ, 350 mV dropout at 100 mA, SOT-23-5 with enable | Higher dropout reduces usable battery range; smaller SOT-23-5 footprint but lower current rating (100 mA) | Choose for ultra-low-power sub-µA sleep modes where 100 mA peak load suffices |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the NCP511SN28T1 delivers balanced performance: moderate IQ (40 µA), low dropout (100 mV), full protection suite, and enable control - making it optimal for mid-tier portable systems needing reliability, efficiency, and design flexibility.
Availability
NCP511SN28T1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, and wireless sensor nodes requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for NCP511SN28T1 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 NCP511 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated portable equipment demanding ultra-low quiescent current, small footprint, and robust protection in harsh thermal environments.
FAQ
What is the maximum input voltage rating for the NCP511SN28T1?
The NCP511SN28T1 has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For applications with input rails exceeding 6.0 V - such as automotive 12 V systems - an external pre-regulator stage is required, as documented in Figure 22 of the official datasheet. The NCP511SN28T1 itself must never be exposed to voltages beyond its 6.0 V rating.
Does the NCP511SN28T1 require an external output capacitor, and what type is recommended?
Yes, the NCP511SN28T1 requires a minimum 1.0 µF output capacitor for stability. Ceramic (X5R/X7R) capacitors are fully supported and preferred due to low ESR and size efficiency; tantalum types are also acceptable. The device is stable across ESR values from a few milliohms up to 3.0 Ω, eliminating ESR tuning requirements common in older LDOs. This simplifies design and lowers BOM cost versus solutions mandating specific capacitor families.
How does the Enable pin function on the NCP511SN28T1, and what happens if it's left unconnected?
The Enable pin (Pin 3) is active-high: pulling it ≥1.3 V enables regulation; pulling it ≤0.3 V disables output and reduces quiescent current to <0.1 µA. If unused, the datasheet explicitly states Enable must be tied to Vin - not left floating - to guarantee proper startup and avoid erratic behavior. Leaving it unconnected risks undefined operation due to noise susceptibility and violates recommended layout practice.
What is the guaranteed output voltage accuracy of the NCP511SN28T1 over temperature and load?
The NCP511SN28T1 guarantees ±2.0% output voltage accuracy across the full industrial temperature range (−40°C to +85°C) and load current (1.0 mA to 150 mA), as verified in the Electrical Characteristics table on page 3 of the datasheet. At 25°C and 1.0 mA load, the typical tolerance tightens to ±0.5% (2.744 V to 2.856 V). This accuracy enables direct use in precision analog signal chains without post-regulation trimming.
Is the NCP511SN28T1 suitable for automotive applications, and what qualifications does it hold?
The NCP511SN28T1 is not automotive-qualified; only the NCV511SN28T1G variant carries AEC-Q100 qualification and PPAP capability. The NCP511SN28T1 is rated for industrial temperature (−40°C to +85°C) and intended for commercial and industrial portable equipment. For automotive body electronics or infotainment subsystems requiring automotive qualification, the NCV511SN28T1G - identical in electrical specs but with enhanced process controls and traceability - must be selected instead of the NCP511SN28T1.
NCP511SN28T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 100mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 50dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP511SN28T1 FAQ
1.How can I place an order for NCP511SN28T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP511SN28T1 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 NCP511SN28T1 reliable?
The price and inventory of NCP511SN28T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP511SN28T1 is usually 5 days.
3.What payment methods are accepted for NCP511SN28T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP511SN28T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP511SN28T1?
NCP511SN28T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP511SN28T1 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 NCP511SN28T1?
For technical support, including NCP511SN28T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP511SN28T1 requirements.
6.How does Aetrix verify that NCP511SN28T1 is sourced from the original manufacturer or authorized distributors?
All NCP511SN28T1 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 NCP511SN28T1 meets industry standards.
7.What is the process for return or replacement of NCP511SN28T1?
All NCP511SN28T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP511SN28T1, 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 NCP511SN28T1 part is unused and in its original packaging.
Return procedure for NCP511SN28T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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