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onsemi NCP512SQ50T1G
- Part No.:
- NCP512SQ50T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ50T1G.pdf
- Description:
- IC REG LINEAR 5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:4,148
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Product details
Overview
NCP512SQ50T1G from onsemi is a fixed-output CMOS low-quiescent-current linear voltage regulator delivering 5.0 V at up to 80 mA, featuring 40 µA typical quiescent current, 180 mV dropout at 80 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring stable low-power regulation.
For engineers reviewing the NCP512SQ50T1G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ, SC-88A (SOT-353) package compatibility, enable-controlled standby mode, thermal shutdown protection, and ceramic capacitor stability without ESR constraints.
Technical Context
The NCP512SQ50T1G integrates a PMOS pass transistor with internal voltage reference, error amplifier, current-limit, and thermal shutdown circuitry. It operates across an input range of 0–6.0 V and maintains regulation down to a 180 mV input-output differential at full 80 mA load.
Its enable pin supports logic-level control (VTH(en) = 0.3 V low / 1.3 V high), and the N/C pin (Pin 4) is unconnected internally. The device achieves 50 dB ripple rejection at 1 kHz and exhibits 180 µVRMS output noise (100 Hz–100 kHz) with 1 µF ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2.0% - ensures stable supply for 5 V logic, USB-peripheral interfaces, and analog sensors requiring tight tolerance. |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on IoT sensors and remote controls. |
| Dropout Voltage | 180 mV at 80 mA - allows operation from single-cell Li-ion (3.0–4.2 V) or two-cell alkaline (up to 3.2 V) with margin. |
| Max Input Voltage | 6.0 V - supports direct connection to 5 V rail or boosted battery sources without external clamping. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial-grade portable equipment including handheld test instruments. |
| Thermal Shutdown | Activates at ~160 °C - protects against sustained overload or poor PCB thermal design without external circuitry. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
Pinout & Package
Package: SC-88A (SOT-353), 5-pin surface-mount micro-miniature package with 0.65 mm pitch, Pb-free, rated for 400 °C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Positive power supply input | Accepts 0–6.0 V unregulated input; requires local 1 µF ceramic decoupling per layout guidelines. |
| 2 (GND) | Power ground reference | Must be low-impedance connection to system ground plane to ensure stability and noise immunity. |
| 3 (Enable) | Active-high enable control | Pull high to Vin to activate regulator; pull ≤0.3 V to disable and reduce IQ to 0.1 µA. |
| 4 (N/C) | No internal connection | Not bonded; must remain unconnected on PCB - no routing or soldering required. |
| 5 (Vout) | Regulated 5.0 V output | Delivers up to 80 mA with <1.0 mV/mA load regulation; supports 1 µF+ ceramic or tantalum output capacitors. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - reduces standby power loss in battery-backed systems by >95% vs. standard LDOs. |
| Low-dropout PMOS architecture | 180 mV dropout at 80 mA - enables higher efficiency and longer runtime than NMOS-based regulators. |
| Stable with ceramic capacitors | No minimum ESR requirement - eliminates need for costly tantalum or polymer caps; simplifies BOM and layout. |
| Integrated protection | Current limit + thermal shutdown - prevents damage during short-circuit or thermal overload without external components. |
| Enable-controlled shutdown | Reduces IQ to 0.1 µA when disabled - ideal for firmware-controlled power sequencing in multi-rail systems. |
Applications
| Portable Medical Sensors | Wireless Remote Controls |
|---|---|
Use Scenario: Battery-powered pulse oximeter with Bluetooth LE transmission operating continuously for 6+ months on CR2032. IC Role / Device Role / Timing Role: Primary 5 V supply regulator for MCU, analog front-end, and BLE radio - enabling low-noise analog sensing and reliable RF link. Use Value: 40 µA IQ extends battery life beyond 2000 hours in sleep mode; 50 dB ripple rejection isolates sensor ADC from RF switching noise. | Use Scenario: Sub-GHz remote control for smart home devices using AA batteries and wake-on-radio functionality. IC Role / Device Role / Timing Role: Always-on 5 V rail for RF receiver and real-time clock - activated only upon valid signal detection. Use Value: Enable pin allows MCU to shut down NCP512SQ50T1G between wake events, reducing average current to <1 µA while preserving fast 1.2 ms turn-on response. |
| Handheld Test Instruments | Industrial Data Loggers |
Use Scenario: Pocket-sized multimeter with LCD display, precision ADC, and USB-C charging interface. IC Role / Device Role / Timing Role: Clean 5 V supply for display driver and USB enumeration circuitry - isolated from noisy battery charger path. Use Value: 180 mV dropout permits operation down to 3.2 V battery voltage; SC-88A footprint saves board space in compact enclosure. | Use Scenario: Ruggedized environmental logger deployed in field enclosures with wide ambient temperature swings (−25 °C to +70 °C). IC Role / Device Role / Timing Role: Main 5 V regulator for microcontroller, SD card interface, and RS-485 transceiver - maintaining regulation across temperature extremes. Use Value: −40 °C to +85 °C rating ensures reliability over full industrial range; ±2.0% output accuracy preserves ADC reference integrity. |
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-5002E/TT | 4.0 µA IQ, 600 mA max output, SOT-23-3 package - no enable pin, higher current capability. | Lacks enable control; unsuitable for firmware-gated power domains but better for high-current 5 V rails. | Select if >80 mA load or simpler 3-pin layout is required; avoid if enable functionality is mandatory. |
| TCS2115-5.0TR | 25 µA IQ, 150 mA output, SC-70-5 package - includes reverse-voltage protection and tighter ±1.0% accuracy. | Offers enhanced fault protection and higher accuracy but lacks thermal shutdown and has different pinout. | Choose for safety-critical designs needing reverse-battery immunity; verify pin compatibility before PCB reuse. |
Compared with MCP1700T-5002E/TT and TCS2115-5.0TR, the NCP512SQ50T1G provides balanced ultra-low IQ, integrated thermal protection, and enable control in a proven SC-88A footprint - making it optimal for space-constrained, battery-sensitive applications where moderate current and robustness are prioritized over minimal quiescent draw or maximum output.
Availability
NCP512SQ50T1G is available at Aetrix Electronics and suitable for portable medical sensors, wireless remote controls, and handheld test instruments requiring stable component supply with long-lifecycle support.
Supply support for NCP512SQ50T1G 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, sensor, and connectivity solutions for automotive, industrial, and consumer markets.
The NCP512 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated portable electronics demanding ultra-low quiescent current, small footprint, and ceramic-capacitor compatibility.
FAQ
What is the maximum input voltage rating for the NCP512SQ50T1G?
The NCP512SQ50T1G has a maximum input voltage rating of 6.0 V, as specified in its Absolute Maximum Ratings table. Exceeding this voltage may cause permanent damage. This rating allows safe operation from common 5 V rails or single-cell Li-ion batteries with headroom, and aligns with the device's internal PMOS pass transistor breakdown limits.
Does the NCP512SQ50T1G require an external capacitor on the enable pin?
No, the NCP512SQ50T1G does not require an external capacitor on the enable pin. The enable input is CMOS-compatible with defined threshold voltages (0.3 V low / 1.3 V high); it functions as a digital control signal. External filtering is unnecessary unless system-level noise immunity demands RC debouncing - which is not specified or recommended in the datasheet for NCP512SQ50T1G.
Can the NCP512SQ50T1G be used with a 10 µF ceramic output capacitor?
Yes, the NCP512SQ50T1G is stable with ceramic output capacitors ranging from 1.0 µF upward, including 10 µF. Its design imposes no minimum ESR requirement, and larger values improve load transient response and noise suppression. The datasheet explicitly validates stability with 1.0 µF ceramic, and application notes confirm scalability to higher values like 10 µF for enhanced performance in noise-sensitive circuits.
What is the thermal shutdown activation temperature of the NCP512SQ50T1G?
The NCP512SQ50T1G activates thermal shutdown at approximately 160 °C junction temperature, as stated in the Applications Information section. This internal protection circuit disables the output to prevent damage during sustained overload or inadequate PCB heat sinking. Recovery occurs automatically once the junction cools below the hysteresis threshold (~140 °C), and the device resumes regulation without external intervention.
Is the NCP512SQ50T1G pin-compatible with other variants in the NCP512 family?
Yes, all NCP512 variants - including NCP512SQ50T1G, NCP512SQ33T1G, and NCP512SQ31T2G - share identical SC-88A (SOT-353) pinout and package dimensions. Pin 1 is Vin, Pin 2 is GND, Pin 3 is Enable, Pin 4 is N/C, and Pin 5 is Vout across the entire series. This allows drop-in replacement for different output voltages without PCB redesign, provided input/output voltage margins and load requirements are verified.
NCP512SQ50T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 90 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:
- SC-88A (SC-70-5/SOT-353)
NCP512SQ50T1G FAQ
1.How can I place an order for NCP512SQ50T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ50T1G 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 NCP512SQ50T1G reliable?
The price and inventory of NCP512SQ50T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ50T1G is usually 5 days.
3.What payment methods are accepted for NCP512SQ50T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ50T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ50T1G?
NCP512SQ50T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ50T1G 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 NCP512SQ50T1G?
For technical support, including NCP512SQ50T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ50T1G requirements.
6.How does Aetrix verify that NCP512SQ50T1G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ50T1G 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 NCP512SQ50T1G meets industry standards.
7.What is the process for return or replacement of NCP512SQ50T1G?
All NCP512SQ50T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ50T1G, 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 NCP512SQ50T1G part is unused and in its original packaging.
Return procedure for NCP512SQ50T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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