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onsemi NCP512SQ50T2G
- Part No.:
- NCP512SQ50T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ50T2G.pdf
- Description:
- IC REG LINEAR 5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:2,550
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Product details
Overview
NCP512SQ50T2G from onsemi is a 5.0 V fixed-output CMOS low-quiescent-current linear voltage regulator in SC-88A (SOT-353) package, featuring 40 µA typical quiescent current, 180 mV dropout at 80 mA, ±2.0% output voltage accuracy, and −40 °C to +85 °C operating range-designed for battery-powered portable electronics requiring stable low-power regulation.
For engineers reviewing the NCP512SQ50T2G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ, PMOS pass transistor architecture, enable-controlled standby mode, SC-88A footprint compatibility, and ceramic-capacitor stability without ESR constraints.
Technical Context
The NCP512SQ50T2G implements a PMOS-based LDO topology with internal voltage reference, error amplifier, and thermal/current limiting protection. Its enable input provides logic-level control of output regulation, with threshold voltages of 1.3 V (turn-on) and 0.3 V (turn-off), and Pin 3 must be tied to Vin if unused.
It operates with input voltages from 0 V to 6.0 V and delivers up to 80 mA output current while maintaining regulation down to a 120 mV dropout (at 5.0 V output, 80 mA, −40 °C to +85 °C), with ground current scaling from 40 µA (no load) to 90 µA (full load).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2.0% over −40 °C to +85 °C and 1–80 mA load |
| Quiescent Current | 40 µA typical at 1–80 mA load-enables multi-year battery life in always-on sensors |
| Dropout Voltage | 120 mV at 5.0 V/80 mA (−40 °C to +85 °C)-supports operation from single Li-ion or 2xAA cells |
| Input Voltage Range | 0 V to 6.0 V-compatible with common battery and intermediate rail supplies |
| Enable Threshold | Logic-high ≥1.3 V (enable), logic-low ≤0.3 V (disable)-direct interface with 1.8 V/3.3 V GPIO |
| Thermal Protection | Internal shutdown at ~160 °C junction temperature-prevents catastrophic failure during overload |
| Noise Performance | 180 µVRMS (100 Hz–100 kHz)-suitable for noise-sensitive analog/RF subsystems |
Pinout & Package
The NCP512SQ50T2G is housed in the SC-88A (SOT-353) surface-mount package-0.65 mm pitch, 2.0 × 2.1 mm body, 0.95 mm max height-with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Positive power supply input | Accepts 0–6.0 V; requires local 1.0 µF decoupling capacitor |
| 2 (GND) | Power supply ground reference | Low-impedance return path for input/output currents and internal bias |
| 3 (Enable) | Regulator enable control input | Active-high logic; tie to Vin if unused; enables <1 µA shutdown current |
| 4 (N/C) | No internal connection | Not bonded; must remain floating-no PCB trace or solder mask required |
| 5 (Vout) | Regulated 5.0 V output | Stable output capable of sourcing up to 80 mA with <3% deviation under load transients |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical-extends battery runtime in IoT endpoints and wearables |
| PMOS pass transistor | Enables low dropout and no reverse current flow from Vout to Vin |
| Ceramic-capacitor compatible | Stable with 1.0 µF output capacitance and ESR from near-zero to 5 Ω-reduces BOM cost and size |
| Enable-controlled standby | Reduces total system current to <1 µA when disabled-ideal for duty-cycled sensing |
| Integrated protection | Current limit, thermal shutdown, and ESD robustness (2 kV HBM)-eliminates need for external protection components |
Applications
| Portable Medical Sensors | Wireless Remote Controls |
|---|---|
Use Scenario: Coin-cell–powered pulse oximeter with Bluetooth LE transmission every 30 seconds. IC Role / Device Role / Timing Role: Primary 5.0 V supply for MCU and optical sensor ASIC during active measurement and radio burst. Use Value: 40 µA quiescent current enables >2-year battery life; 120 mV dropout allows full utilization of declining coin-cell voltage. | Use Scenario: Sub-GHz RF remote using two AAA batteries and wake-on-button press. IC Role / Device Role / Timing Role: Always-on 5.0 V rail for RF SoC sleep-mode logic and button debouncing circuitry. Use Value: Enable pin permits MCU-controlled power gating; SC-88A footprint fits compact 12 mm × 20 mm PCB area. |
| Industrial Data Loggers | Smart Home Motion Detectors |
Use Scenario: Solar-charged environmental logger sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Stable 5.0 V source for microcontroller, ADC, and non-volatile memory during brief active periods. Use Value: ±2.0% output accuracy ensures consistent ADC reference; thermal protection prevents field failure in enclosed enclosures. | Use Scenario: Battery-operated PIR sensor with integrated Zigbee radio and LED status indicator. IC Role / Device Role / Timing Role: Regulated 5.0 V supply for motion detection IC, radio transceiver, and LED driver during event-triggered wake-up. Use Value: 180 µVRMS output noise avoids interference with analog PIR signal chain; 80 mA output supports simultaneous radio transmit and LED flash. |
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/MB | 4.0 µA typical IQ, 6 V max input, SOT-23-3 package (no enable) | Lacks enable pin and N/C terminal; smaller footprint but no standby control | Choose when minimal quiescent current is critical and enable functionality is unnecessary |
| TPS70650DBVR | 1.3 µA typical IQ, 6.5 V max input, SOT-23-5 package with active-low enable | Inverts enable logic polarity and uses different pinout; higher cost and larger die size | Prefer when sub-µA shutdown current is mandatory and board layout accommodates SOT-23-5 |
Compared with MCP1700T-5002E/MB and TPS70650DBVR, the NCP512SQ50T2G offers balanced ultra-low IQ, industry-standard SC-88A pinout with dedicated enable, and proven ceramic-capacitor stability-making it optimal for space-constrained, battery-gated designs where moderate IQ and precise enable control outweigh absolute minimum standby current.
Availability
NCP512SQ50T2G is available at Aetrix Electronics and suitable for portable medical sensors, wireless remote controls, and industrial data loggers requiring stable component supply despite end-of-life status.
Supply support for NCP512SQ50T2G 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, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The NCP512 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for ultra-low-power battery-operated devices where extended runtime and small-footprint integration are primary design goals.
FAQ
What is the maximum input voltage rating for the NCP512SQ50T2G?
The NCP512SQ50T2G has an absolute maximum input voltage rating of 6.0 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating input range is 5.0 V to 6.0 V when regulating 5.0 V output-ensuring sufficient headroom for dropout while staying within safe thermal limits. The device's PMOS architecture prevents reverse current flow even if Vin drops below Vout.
Does the NCP512SQ50T2G require an external pull-up resistor on the Enable pin?
No, the NCP512SQ50T2G does not require an external pull-up resistor on the Enable pin. When unused, Pin 3 (Enable) must be directly connected to Vin to ensure continuous operation. The internal enable circuit draws negligible current, and tying it to Vin guarantees logic-high activation without additional components-reducing BOM count and PCB area in space-constrained designs.
Can the NCP512SQ50T2G be used with a 10 µF ceramic output capacitor?
Yes, the NCP512SQ50T2G is fully stable with a 10 µF ceramic output capacitor. Its design explicitly supports ceramic capacitors from 1.0 µF up to any practical value, with ESR ranging from near-zero to 5 Ω. Larger values improve load transient response and ripple rejection-particularly beneficial in systems with pulsed loads like RF transceivers or LED drivers-without risking oscillation or instability.
Is the NCP512SQ50T2G still in production or available for new designs?
The NCP512SQ50T2G is marked as discontinued by onsemi per its official datasheet revision history (Rev. 16, Jan 2026). However, Aetrix Electronics maintains limited legacy inventory and supports last-time-buy programs, including traceable sourcing and lifecycle coordination-enabling continued use in maintenance, replacement, and legacy production runs where redesign is impractical or cost-prohibitive.
What is the thermal resistance (RJA) of the NCP512SQ50T2G in standard FR-4 PCB layout?
The NCP512SQ50T2G has a specified thermal resistance RJA of 400 °C/W under standard JEDEC test conditions (single-layer 1 in² copper pad). In typical 2-layer FR-4 layouts with modest copper pour, actual RJA ranges from 250–350 °C/W. At 80 mA load and 6.0 V input, power dissipation is ~80 mW-resulting in ~20–28 °C junction rise above ambient, well within the +150 °C maximum rating.
NCP512SQ50T2G 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)
NCP512SQ50T2G FAQ
1.How can I place an order for NCP512SQ50T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ50T2G 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 NCP512SQ50T2G reliable?
The price and inventory of NCP512SQ50T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ50T2G is usually 5 days.
3.What payment methods are accepted for NCP512SQ50T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ50T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ50T2G?
NCP512SQ50T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ50T2G 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 NCP512SQ50T2G?
For technical support, including NCP512SQ50T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ50T2G requirements.
6.How does Aetrix verify that NCP512SQ50T2G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ50T2G 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 NCP512SQ50T2G meets industry standards.
7.What is the process for return or replacement of NCP512SQ50T2G?
All NCP512SQ50T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ50T2G, 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 NCP512SQ50T2G part is unused and in its original packaging.
Return procedure for NCP512SQ50T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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