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onsemi NCP512SQ28T1
- Part No.:
- NCP512SQ28T1
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ28T1.pdf
- Description:
- IC REG LDO LQC 80MA 2.8V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:42,332
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Product details
Overview
NCP512SQ28T1 from onsemi is a fixed-output 2.8 V CMOS low-quiescent-current linear voltage regulator in SC-88A (SOT-353) package, designed for battery-powered portable electronics. It delivers up to 80 mA output current with 40 µA typical quiescent current, 200 mV dropout at 80 mA, ±2.0% output voltage accuracy, and operates across −40 °C to +85 °C ambient temperature - enabling long runtime in handheld instruments and camcorders.
For engineers reviewing the NCP512SQ28T1 datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ, SC-88A footprint compatibility, enable-controlled standby mode, ceramic-capacitor stability, and industrial-grade thermal performance without external compensation.
Technical Context
The NCP512SQ28T1 integrates a PMOS pass transistor, precision voltage reference, error amplifier, and protection circuitry (current limit and thermal shutdown). Its architecture enables stable regulation with 1.0 µF input/output ceramic capacitors and supports logic-level enable control with 0.3 V low-threshold turn-off.
Dropout voltage is specified at 200 mV (typical) under full 80 mA load at 2.8 V output, and line/load regulation are 1.0 mV/V and 0.3 mV/mA respectively - confirming suitability for tightly regulated, low-noise power rails in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2.0% over −40 °C to +85 °C - ensures consistent biasing for 2.8 V logic or analog circuitry. |
| Quiescent Current | 40 µA typical (IOUT = 1–80 mA) - extends battery life in always-on sensor nodes and standby modes. |
| Dropout Voltage | 200 mV typical at 80 mA - allows operation from 3.0 V supply while maintaining regulation down to 2.8 V output. |
| Max Output Current | 80 mA continuous - sufficient for powering microcontrollers, RF transceivers, or display drivers in compact devices. |
| Enable Threshold | 0.3 V (logic low disable) - compatible with 1.8 V/3.3 V GPIOs without level-shifting. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 180 µVRMS (100 Hz–100 kHz) - low enough for noise-sensitive analog signal chains and ADC references. |
Pinout & Package
The NCP512SQ28T1 is housed in the SC-88A (SOT-353) surface-mount package - a 5-pin, 1.25 mm × 2.1 mm micro-miniature outline with 0.65 mm pitch, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply (0–6.0 V); requires local 1.0 µF decoupling capacitor. |
| 2 | GND | Power ground reference; must be low-impedance connection to minimize noise coupling. |
| 3 | Enable | Active-high digital control: ≥1.3 V enables regulation; ≤0.3 V disables output and reduces IQ to 0.1 µA. |
| 4 | N/C | No internal connection - left unconnected; no routing or soldering required. |
| 5 | Vout | Stable 2.8 V regulated output; supports 1.0 µF ceramic capacitor with ESR up to 5 Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >1-year battery life in 10 µA average-load IoT sensors. |
| Low-dropout PMOS architecture | 200 mV dropout at 80 mA eliminates need for higher-input-voltage rails in single-cell Li-ion or 3 V coin-cell systems. |
| SC-88A package compatibility | Standardized 5-pin footprint allows drop-in replacement with other NCP512 variants (e.g., NCP512SQ30T1G) without layout change. |
| Enable-controlled shutdown | Reduces total system IQ to sub-µA levels during sleep cycles, critical for energy-harvesting and wake-on-event designs. |
| Ceramic capacitor stability | Stable with 1.0 µF X5R/X7R ceramics - avoids costly tantalum or polymer caps and simplifies BOM. |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and analog front-end. IC Role / Device Role / Timing Role: Primary 2.8 V supply for op-amps, ADC, and BLE SoC core domain. Use Value: 40 µA IQ extends CR2032 battery life beyond 9 months; 180 µVRMS noise prevents ADC quantization errors. |
Use Scenario: Optical heart-rate sensor module with photodiode amplifier and MCU. IC Role / Device Role / Timing Role: Low-noise 2.8 V rail for analog signal chain and sensor interface logic. Use Value: SC-88A footprint fits <25 mm² wearable PCB; 200 mV dropout allows direct use of 3.0 V boost converter output. |
| Industrial Handheld Scanners | Smart Home Doorbell Cameras |
Use Scenario: Rugged barcode scanner with laser driver, imager, and Wi-Fi MCU. IC Role / Device Role / Timing Role: Regulated 2.8 V supply for image sensor interface and flash memory I/O. Use Value: −40 °C to +85 °C rating ensures reliability in warehouse environments; enable pin synchronizes power with scan trigger. |
Use Scenario: Battery-powered video doorbell with motion detection and streaming encoder. IC Role / Device Role / Timing Role: Standby-mode LDO for real-time clock and PIR sensor, activated only during motion events. Use Value: 0.1 µA shutdown current minimizes self-discharge; 50 dB ripple rejection isolates video processing from switching PSU noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 3.0 µA IQ (lower), 6 V max input, SOT-23-3 package (3-pin, no enable) | Lacks enable control and N/C pin; requires external resistor divider if input >6 V | Preferred when ultra-low IQ dominates and enable functionality is unnecessary. |
| Torex XC6206P282MR-G | 1.0 µA IQ, 6 V max input, SOT-23-3, no enable, ±2% accuracy | No enable pin; fixed 2.8 V output but incompatible pinout and no shutdown mode | Selected for lowest possible standby current where system-level enable is handled externally. |
Compared with NCP512SQ28T1, MCP1700T-2802E/TT offers lower quiescent current but sacrifices enable control and package compatibility, while XC6206P282MR-G achieves nanoscale IQ at the cost of design flexibility and integration - making NCP512SQ28T1 the balanced choice for systems needing both low IQ and active power management in minimal area.
Availability
NCP512SQ28T1 is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and industrial handheld scanners requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for NCP512SQ28T1 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, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The NCP512 series was developed specifically for ultra-low-power, space-constrained portable electronics - emphasizing minimal quiescent current, ceramic-capacitor compatibility, and robust thermal performance in micro-packages.
FAQ
What is the maximum input voltage rating for the NCP512SQ28T1?
The NCP512SQ28T1 has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable 2.8 V output, the recommended minimum input is 3.0 V (accounting for 200 mV dropout), and typical operating range is 3.0 V to 5.5 V to ensure margin against line transients and thermal derating.
Does the NCP512SQ28T1 require external compensation components?
No, the NCP512SQ28T1 is internally compensated and stable with 1.0 µF ceramic output capacitors - no external resistors, capacitors, or ESR requirements are needed. This eliminates tuning effort and reduces BOM count, unlike many older LDOs that mandate specific capacitor types or values.
How does the enable pin function on the NCP512SQ28T1?
The enable pin (Pin 3) is active-high: pulling it ≥1.3 V turns on regulation; pulling it ≤0.3 V disables the output and reduces quiescent current to 0.1 µA. If unused, it must be tied to Vin - floating the pin may cause erratic behavior or increased leakage due to undefined logic state.
Is the NCP512SQ28T1 RoHS-compliant and lead-free?
Yes, the NCP512SQ28T1 is a Pb-Free device per J-STD-609, marked with "G" suffix and microdot indicator per onsemi's packaging standard. It meets RoHS Directive 2011/65/EU and is compatible with lead-free reflow profiles (peak temperature ≤260 °C).
What is the thermal shutdown threshold for the NCP512SQ28T1?
The NCP512SQ28T1 incorporates thermal protection that activates at approximately 160 °C junction temperature, disabling output until the die cools by ~15 °C hysteresis. This prevents catastrophic failure during sustained overload or poor PCB heat sinking - verified per onsemi's internal characterization, not datasheet-specified test conditions.
NCP512SQ28T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- SC-88A (SC-70-5/SOT-353)
NCP512SQ28T1 FAQ
1.How can I place an order for NCP512SQ28T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ28T1 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 NCP512SQ28T1 reliable?
The price and inventory of NCP512SQ28T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ28T1 is usually 5 days.
3.What payment methods are accepted for NCP512SQ28T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ28T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ28T1?
NCP512SQ28T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ28T1 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 NCP512SQ28T1?
For technical support, including NCP512SQ28T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ28T1 requirements.
6.How does Aetrix verify that NCP512SQ28T1 is sourced from the original manufacturer or authorized distributors?
All NCP512SQ28T1 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 NCP512SQ28T1 meets industry standards.
7.What is the process for return or replacement of NCP512SQ28T1?
All NCP512SQ28T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ28T1, 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 NCP512SQ28T1 part is unused and in its original packaging.
Return procedure for NCP512SQ28T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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