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onsemi NCP512SQ25T2G
- Part No.:
- NCP512SQ25T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ25T2G.pdf
- Description:
- IC REG LINEAR 2.5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:3,847
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Product details
Overview
NCP512SQ25T2G from onsemi is a fixed-output CMOS low-quiescent-current linear voltage regulator delivering 2.5 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 supply regulation.
For engineers reviewing the NCP512SQ25T2G 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 NCP512SQ25T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and internal protection circuits (current limit, thermal shutdown). It operates with input voltages from 0 V to 6.0 V and maintains regulation across −40 °C to +85 °C ambient temperature.
Its enable pin provides logic-level control (VTH(en) = 1.3 V typ. turn-on, 0.3 V typ. turn-off), and it achieves 50 dB ripple rejection at 1 kHz while supporting 1.0 µF ceramic input/output capacitors - eliminating need for tantalum or minimum-ESR requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.0% - tightly regulated rail for MCU core or sensor analog supply. |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on IoT sensors. |
| Dropout Voltage | 180 mV at 80 mA - supports operation down to Vin = 2.68 V while sustaining full load. |
| Max Input Voltage | 6.0 V - compatible with single-cell Li-ion (4.2 V max) and dual-cell alkaline (3.2 V fresh). |
| Operating Temp | −40 °C to +85 °C - qualified for industrial and consumer handheld environments. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters. |
| Output Noise | 180 µVRMS (100 Hz–100 kHz) - suitable for low-noise analog signal chains. |
Pinout & Package
Package: SC-88A (SOT-353), 5-pin surface-mount micro-miniature package (2.1 mm × 1.6 mm × 0.95 mm), Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin. |
| 2 | GND | Power ground - requires low-impedance PCB trace to minimize noise coupling and thermal resistance. |
| 3 | Enable | Active-high digital control - pulls low to disable regulator (IQ < 0.1 µA); connect to Vin if unused. |
| 4 | N/C | No internal connection - must remain unconnected; no routing or soldering required. |
| 5 | Vout | Regulated 2.5 V output - drives load directly; output capacitor (≥1.0 µF) must be placed within 2 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - reduces standby power loss by >95% vs. standard LDOs in sleep-mode systems. |
| Low-dropout PMOS architecture | 180 mV dropout at 80 mA - enables higher efficiency and longer runtime in low-Vin battery states. |
| Enable-controlled shutdown | Logic-compatible EN pin with 1.3 V turn-on threshold - allows direct interfacing with 1.8 V/3.3 V GPIOs. |
| Ceramic-capacitor stable | No minimum ESR requirement - eliminates cost and size penalty of tantalum or polymer capacitors. |
| Integrated protection | Thermal shutdown (160 °C) and current limiting - prevents damage during overload or PCB layout faults. |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using ultra-low-power ADC and BLE SoC. IC Role / Device Role / Timing Role: Primary 2.5 V supply for analog front-end and RF transceiver during active sensing cycles. Use Value: 40 µA IQ extends coin-cell lifetime beyond 12 months; SC-88A footprint minimizes PCB area in compact wearable housing. |
Use Scenario: Heart-rate monitoring wristband with motion-sensing accelerometer and optical PPG. IC Role / Device Role / Timing Role: Dedicated low-noise 2.5 V rail for photodiode amplifier and precision reference buffer. Use Value: 180 µVRMS output noise ensures sub-1% measurement error in optical signal chain; enable pin synchronizes power with sensor sampling. |
| Smart Remote Controls | Industrial Handheld Scanners |
|
Use Scenario: IR/RF remote with button wake-up, display backlight, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Always-on 2.5 V supply for real-time clock and wake-up controller; switched rail for display driver. Use Value: Enable pin disables Vout during deep sleep (IQ < 0.1 µA), reducing average current to < 1 µA - enabling 5+ year battery life on CR2032. |
Use Scenario: Rugged barcode scanner operating in warehouse environments with wide temperature swings. IC Role / Device Role / Timing Role: Main 2.5 V supply for image sensor interface and ARM Cortex-M4 MCU core logic. Use Value: −40 °C to +85 °C rating ensures reliable startup and regulation across seasonal warehouse conditions; 50 dB ripple rejection isolates sensor data from motor drive noise. |
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-2502E/MB | 250 mA output, 1.6 µA IQ, SOT-23-5 package - higher current but lower IQ; dropout 600 mV at 250 mA. | Preferred for higher-load applications (e.g., multi-rail PMIC subsystems) where 250 mA is needed and board space allows SOT-23. | Select when >80 mA load current or sub-µA standby is critical; verify thermal derating at 250 mA in SC-70 footprint. |
| Torex XC6206P252MR-G | 150 mA output, 1 µA IQ, SOT-25 package - ultra-low IQ but only 50 dB PSRR at 1 kHz; no enable pin. | Suitable for simple always-on rails without dynamic power gating; lacks EN control for duty-cycled systems. | Choose for lowest possible IQ in non-switched applications; avoid where GPIO-controlled shutdown is required. |
Compared with MCP1700T-2502E/MB and XC6206P252MR-G, the NCP512SQ25T2G delivers optimal balance of 80 mA capability, 40 µA IQ, integrated enable, and SC-88A compactness - making it ideal for space-constrained, battery-sensitive designs needing controlled power sequencing.
Availability
NCP512SQ25T2G is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and industrial handheld scanners requiring stable component supply with long-term lifecycle assurance.
Supply support for NCP512SQ25T2G 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 innovation for automotive, industrial, cloud, and intelligent edge applications.
The NCP512 series belongs to onsemi's precision low-power analog portfolio, engineered specifically for battery-operated portable electronics demanding ultra-low quiescent current, small footprint, and robust thermal performance.
FAQ
What is the maximum input voltage rating for the NCP512SQ25T2G?
The NCP512SQ25T2G has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable 2.5 V output regulation, Vin must exceed Vout by at least the dropout voltage - e.g., ≥2.68 V at 80 mA load. The device includes internal protection against overvoltage stress on the Vin pin.
Does the NCP512SQ25T2G require an external pull-up resistor on the Enable pin?
No, the NCP512SQ25T2G does not require an external pull-up on the Enable pin. When unused, the Enable pin must be connected directly to Vin to ensure continuous operation. Its logic-high threshold is 1.3 V (typical), compatible with 1.8 V and 3.3 V GPIOs without additional biasing components.
Can the NCP512SQ25T2G operate with a 1.0 µF ceramic capacitor on both input and output?
Yes - the NCP512SQ25T2G is explicitly designed for stability with 1.0 µF ceramic capacitors on both input and output. Unlike many LDOs, it imposes no minimum ESR requirement, allowing use of low-cost, high-reliability X5R/X7R MLCCs without risk of oscillation or poor transient response.
What is the thermal shutdown trigger temperature for the NCP512SQ25T2G?
The NCP512SQ25T2G activates thermal shutdown at approximately 160 °C junction temperature. Once triggered, the regulator disables output until junction temperature falls below the hysteresis threshold (~140 °C). This protects the IC during sustained overload or inadequate PCB copper pour in the SC-88A thermal pad area.
Is the NCP512SQ25T2G still in active production or discontinued?
Per onsemi's January 2026 datasheet revision (Rev. 16), the NCP512SQ25T2G is marked as discontinued in the official ordering table (page 9). However, Aetrix Electronics maintains active inventory and supply-chain continuity support for this part, including last-time-buy planning and alternative migration guidance for legacy designs.
NCP512SQ25T2G 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):
- 2.5V
- 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)
NCP512SQ25T2G FAQ
1.How can I place an order for NCP512SQ25T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ25T2G 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 NCP512SQ25T2G reliable?
The price and inventory of NCP512SQ25T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ25T2G is usually 5 days.
3.What payment methods are accepted for NCP512SQ25T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ25T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ25T2G?
NCP512SQ25T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ25T2G 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 NCP512SQ25T2G?
For technical support, including NCP512SQ25T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ25T2G requirements.
6.How does Aetrix verify that NCP512SQ25T2G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ25T2G 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 NCP512SQ25T2G meets industry standards.
7.What is the process for return or replacement of NCP512SQ25T2G?
All NCP512SQ25T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ25T2G, 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 NCP512SQ25T2G part is unused and in its original packaging.
Return procedure for NCP512SQ25T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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