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onsemi NCP512SQ50T1
- Part No.:
- NCP512SQ50T1
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ50T1.pdf
- Description:
- IC REG LDO LQC 80MA 5.0V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,980
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Product details
Overview
NCP512SQ50T1 from onsemi is a fixed-output 5.0 V CMOS low-quiescent-current linear voltage regulator in SC-88A (SOT-353) package, designed for battery-powered portable electronics requiring ultra-low standby current (40 µA typical), low dropout (120 mV at 80 mA), and ±2.0% output accuracy across −40 °C to +85 °C. It integrates PMOS pass transistor, thermal shutdown, current limit, and enable control - used in handheld instruments and camcorders where stable 5 V rail and minimal quiescent draw are critical.
For engineers reviewing the NCP512SQ50T1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.0 V fixed output, 80 mA rated load, SC-88A footprint compatibility, enable-controlled shutdown, and ceramic-capacitor stability - all validated for industrial-temperature portable power management.
Technical Context
The NCP512SQ50T1 implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and protection circuitry. Its enable input provides logic-level control (VTH(en) = 1.3 V typ. high, 0.3 V max. low), allowing system-level power sequencing without external FETs.
It operates with input voltages from 0 V to 6.0 V and delivers regulated 5.0 V output with 2.0% initial accuracy and ±100 ppm/°C temperature coefficient. Dropout is specified at 120 mV (typ.) under full 80 mA load at 25 °C, rising to 300 mV at −40 °C to +85 °C per datasheet Table 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2.0% over −40 °C to +85 °C - ensures stable logic supply for microcontrollers or sensors requiring precise 5 V rail. |
| Quiescent Current | 40 µA typical (IQ) with enable high and no load - enables multi-year battery life in always-on IoT sensors. |
| Dropout Voltage | 120 mV typical at 80 mA and 25 °C - allows operation from single-cell Li-ion (3.0–4.2 V) or two-cell alkaline (up to 3.2 V) with margin. |
| Maximum Output Current | 80 mA continuous - sufficient for low-power MCU cores, RF transceivers, or analog front-ends in portable devices. |
| Input Voltage Range | 0 V to 6.0 V - supports direct connection to unregulated battery sources or upstream switching converter outputs. |
| Enable Threshold | 1.3 V min. (high), 0.3 V max. (low) - compatible with 1.8 V, 3.3 V, and 5 V logic families for clean power gating. |
| Thermal Protection | Internal shutdown at ~160 °C junction - prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
The NCP512SQ50T1 is housed in the SC-88A (SOT-353) surface-mount package - a 5-pin, 1.6 mm × 1.6 mm × 0.9 mm micro-miniature outline with 0.65 mm pitch, optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin for line transient immunity. |
| 2 | GND | Power ground reference - requires low-impedance PCB trace to minimize noise coupling into regulation loop. |
| 3 | Enable | Active-high digital control - pulls low to disable output (IQ ≤ 0.1 µA); if unused, tie directly to Vin to ensure always-on operation. |
| 4 | N/C | No internal connection - must remain floating; no PCB trace or pad required beyond mechanical support. |
| 5 | Vout | Regulated 5.0 V output - requires ≥1.0 µF output capacitor (ceramic or tantalum) for stability and load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >10-year battery life in coin-cell-powered remote sensors using NCP512SQ50T1. |
| Low-dropout PMOS architecture | 120 mV dropout at 80 mA allows efficient 5 V regulation from marginal input sources like aging alkaline batteries. |
| Stable with ceramic capacitors | No ESR requirement eliminates need for costly tantalum or polymer caps - reduces BOM cost and board area for NCP512SQ50T1 designs. |
| Integrated protection | Current limit and thermal shutdown prevent latch-up or destruction during short-circuit or overheating events - no external components needed. |
| Pb-free SC-88A package | RoHS-compliant 5-pin SOT-353 footprint ensures compatibility with standard reflow processes and automated assembly lines. |
Applications
| Portable Medical Sensors | Industrial Handheld Scanners |
|---|---|
|
Use Scenario: Battery-powered glucose meter with Bluetooth LE transmission and LCD display operating 2+ years on CR2032. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying MCU, sensor interface, and RF transceiver - enabling deep-sleep mode with <50 µA system quiescent. Use Value: NCP512SQ50T1's 40 µA IQ and 120 mV dropout extend usable battery voltage range down to 3.2 V, delaying replacement cycles. |
Use Scenario: Rugged barcode scanner powered by 2×AA alkaline cells, requiring stable 5 V for imager and decode engine across temperature extremes. IC Role / Device Role / Timing Role: Main voltage regulator delivering 5 V at up to 80 mA with ±2.0% accuracy - maintaining decode reliability despite battery sag. Use Value: NCP512SQ50T1's −40 °C to +85 °C rating and 300 mV max dropout at temperature ensure consistent performance in warehouse environments. |
| Wearable Fitness Trackers | Smart Home Remote Controls |
|
Use Scenario: Compact wrist-worn device with accelerometer, heart-rate monitor, and BLE radio, powered by rechargeable Li-poly cell. IC Role / Device Role / Timing Role: Secondary 5 V regulator for USB-charging interface and LED indicators - enabled only during charging via host signal. Use Value: NCP512SQ50T1's enable pin allows zero-load shutdown (≤0.1 µA), eliminating leakage when not connected to USB host. |
Use Scenario: IR remote with motion wake-up and RF feedback, running 5+ years on AAA batteries with intermittent button presses. IC Role / Device Role / Timing Role: Always-on 5 V supply for ultra-low-power MCU and RF receiver - maintaining real-time clock and wake detection. Use Value: NCP512SQ50T1's 40 µA IQ and ceramic-capacitor compatibility reduce total solution size and cost versus legacy LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/TT | 5.0 V fixed, 250 mA output, 1.6 µA IQ, SOT-23-5 package - higher current but lower quiescent than NCP512SQ50T1. | Used in higher-load applications like motor drivers or multi-peripheral systems where 80 mA is insufficient. | Select when >80 mA output or sub-µA standby is required; verify PCB layout change for SOT-23-5 vs. SC-88A. |
| TPS70650DBVR | 5.0 V fixed, 150 mA output, 4.5 µA IQ, SOT-23-5 - lower IQ but larger package and different pinout than NCP512SQ50T1. | Preferred in automotive body electronics where extended temperature range (−40 °C to +125 °C) is mandatory. | Choose for AEC-Q100-qualified designs needing wider temp range; not drop-in due to pin mismatch and footprint change. |
Compared with MCP1700T-5002E/TT and TPS70650DBVR, the NCP512SQ50T1 offers optimal balance of ultra-low IQ, compact SC-88A footprint, and industrial-temperature operation - making it ideal for space- and battery-limited consumer portables where 80 mA suffices.
Availability
NCP512SQ50T1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld scanners, and wearable fitness trackers requiring stable component supply with long lifecycle visibility and RoHS compliance.
Supply support for NCP512SQ50T1 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP512 series was developed specifically for ultra-low-power portable electronics - emphasizing minimal quiescent current, small-footprint packaging, and ceramic-capacitor compatibility to simplify design-in for battery-operated devices.
FAQ
What is the output voltage tolerance of the NCP512SQ50T1 over temperature?
The NCP512SQ50T1 maintains 5.0 V output with ±2.0% accuracy across the full industrial temperature range of −40 °C to +85 °C, as verified in Electrical Characteristics Table 2. This includes both initial calibration error and temperature-induced drift, ensuring reliable logic-level compatibility for downstream ICs.
Can the NCP512SQ50T1 operate with input voltage below 5.0 V?
Yes - the NCP512SQ50T1 can regulate 5.0 V output from inputs as low as 5.12 V (5.0 V + 120 mV dropout) at 80 mA and 25 °C. At −40 °C to +85 °C, minimum input rises to 5.3 V due to increased dropout (300 mV max). Operation below 5.0 V input is not possible since output cannot exceed input.
Is the NCP512SQ50T1 pin-compatible with other NCP512 variants?
Yes - all NCP512 variants including NCP512SQ50T1 share identical SC-88A (SOT-353) pinout and package dimensions. Only the output voltage and marking code differ; thus, board reuse is possible across 1.3 V to 5.0 V versions with firmware or resistor network updates.
Does the NCP512SQ50T1 require an external pull-up on the Enable pin?
No - the NCP512SQ50T1 does not require an external pull-up. If enable functionality is unused, the Enable pin must be hard-connected to Vin to guarantee turn-on. Leaving it floating risks undefined output state due to noise susceptibility and unspecified leakage paths.
What is the maximum power dissipation of the NCP512SQ50T1 at 25 °C ambient?
At 25 °C ambient, the NCP512SQ50T1 supports up to 250 mW maximum power dissipation before thermal shutdown activates, calculated as (TJ(max) − TA) / RJA = (125 °C − 25 °C) / 400 °C/W. This corresponds to ~50 mA load at 5.0 V output with 6.0 V input, assuming worst-case 400 °C/W junction-to-ambient thermal resistance.
NCP512SQ50T1 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)
NCP512SQ50T1 FAQ
1.How can I place an order for NCP512SQ50T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ50T1 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 NCP512SQ50T1 reliable?
The price and inventory of NCP512SQ50T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ50T1 is usually 5 days.
3.What payment methods are accepted for NCP512SQ50T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ50T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ50T1?
NCP512SQ50T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ50T1 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 NCP512SQ50T1?
For technical support, including NCP512SQ50T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ50T1 requirements.
6.How does Aetrix verify that NCP512SQ50T1 is sourced from the original manufacturer or authorized distributors?
All NCP512SQ50T1 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 NCP512SQ50T1 meets industry standards.
7.What is the process for return or replacement of NCP512SQ50T1?
All NCP512SQ50T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ50T1, 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 NCP512SQ50T1 part is unused and in its original packaging.
Return procedure for NCP512SQ50T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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