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onsemi NCP512SQ25T1
- Part No.:
- NCP512SQ25T1
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ25T1.pdf
- Description:
- IC REG LDO LQC 80MA 2.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:13,278
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Product details
Overview
NCP512SQ25T1 from onsemi is a fixed-output 2.5 V 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, and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring stable low-power supply rails.
For engineers reviewing the NCP512SQ25T1 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 temperature operation from –40°C to +85°C.
Technical Context
The NCP512SQ25T1 integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection. 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 180 mV dropout at full load.
Its enable pin provides logic-level control (VTH(HI) = 1.3 V, VTH(LO) = 0.3 V), and it achieves 50 dB ripple rejection at 1 kHz with 1 µF ceramic input/output capacitors - enabling robust performance in noise-sensitive portable systems without ESR constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.0% over –40°C to +85°C - ensures stable MCU core or sensor bias rail under battery voltage sag. |
| Quiescent Current | 40 µA typical (IOUT = 1–80 mA) - extends battery life in always-on wearable or IoT sleep modes. |
| Dropout Voltage | 180 mV at 80 mA and 2.5 V output - supports operation down to ~2.68 V input, compatible with single Li-ion or dual Alkaline cells. |
| Line Regulation | ≤3.0 mV/V (1.3–4.4 V input range) - minimizes output drift during battery discharge or input ripple. |
| Load Regulation | 0.3–0.8 mV/mA - maintains tight voltage control across dynamic load steps in handheld instrumentation. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters in compact PCB layouts. |
| Operating Temp | –40°C to +85°C ambient - qualified for industrial-grade portable equipment deployment. |
Pinout & Package
Package: SC-88A (SOT-353), 5-pin surface-mount, 1.9 mm × 1.35 mm × 0.9 mm body, Pb-free (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts 0–6.0 V; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| 2 | Gnd | Power ground reference - low-impedance connection required to minimize noise coupling and thermal rise. |
| 3 | Enable | Active-high digital control - pulls low to disable regulator (IQ < 0.1 µA); tie to Vin if unused. |
| 4 | N/C | No internal connection - electrically isolated; no routing or soldering required. |
| 5 | Vout | Regulated 2.5 V output - drives loads up to 80 mA; stable with 1 µF ceramic output capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >1-year battery life in 10 µA average-load IoT sensors. |
| Ceramic-capacitor compatible | No minimum ESR requirement - eliminates tantalum cost/size penalty and improves reliability. |
| Enable-controlled shutdown | Reduces total system IQ to sub-µA level when peripheral subsystems are inactive. |
| Thermal & current protection | Internal shutdown at ~160°C junction and current limit prevent damage during overload or poor heatsinking. |
| Industrial temperature grade | Validated operation from –40°C to +85°C ambient - suitable for outdoor or automotive-accessory environments. |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) using low-power analog front-end and BLE SoC. IC Role / Device Role / Timing Role: Primary 2.5 V supply for op-amp signal conditioning and ADC reference. Use Value: 40 µA IQ extends coin-cell lifetime beyond 6 months while maintaining ±2% output accuracy across body-temperature variation. |
Use Scenario: Heart-rate monitoring wristband with optical PPG sensor and ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Clean 2.5 V rail for photodiode transimpedance amplifier and SAR ADC. Use Value: 180 mV dropout allows uninterrupted operation as Li-poly battery discharges from 4.2 V to 2.7 V. |
| Handheld Test Instruments | Smart Home Sensor Nodes |
Use Scenario: Battery-powered multimeter with LCD display and precision voltage measurement circuitry. IC Role / Device Role / Timing Role: Stable 2.5 V reference source for 16-bit delta-sigma ADC. Use Value: 50 dB ripple rejection isolates ADC from switching noise of backlight LED driver, improving ENOB by ≥1.5 bits. |
Use Scenario: Zigbee-enabled temperature/humidity node powered by two AA alkaline cells. IC Role / Device Role / Timing Role: Main 2.5 V supply for RF transceiver and microcontroller during periodic wake-up bursts. Use Value: Enable pin synchronizes power delivery with transmission windows, reducing average system current by 70%. |
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 | 3.0 µA IQ, 250 mA output, SOT-23-5 package - lower IQ but higher dropout (600 mV @ 250 mA). | Preferred for ultra-long-life coin-cell devices with light loads (<5 mA); not suitable for 80 mA peak loads. | Select MCP1700T-2502E/MB only if load current ≤25 mA and dropout margin >600 mV is acceptable. |
| TLC7701QDBVR | 12 µA IQ, 100 mA output, adjustable output (requires external resistors), same SC-70-5 footprint. | Requires external feedback network; lacks enable pin; tighter initial accuracy (±0.5%) but wider temp drift (±100 ppm/°C). | Choose TLC7701QDBVR only when adjustable output or higher accuracy at 25°C outweighs need for enable control and ceramic stability. |
Compared with MCP1700T-2502E/MB and TLC7701QDBVR, the NCP512SQ25T1 uniquely balances 40 µA IQ, 80 mA drive capability, integrated enable, and SC-88A footprint - making it optimal for space-constrained, medium-current portable systems where standby efficiency and active-load headroom are both critical.
Availability
NCP512SQ25T1 is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and handheld test instruments requiring stable component supply with consistent parametric performance and RoHS-compliant packaging.
Supply support for NCP512SQ25T1 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 high-performance silicon solutions for automotive, industrial, cloud, and consumer markets.
The NCP512SQ25T1 belongs to the NCP512 series of ultra-low-IQ LDO regulators, engineered specifically for battery-powered portable equipment where extended runtime, small footprint, and ceramic-capacitor simplicity are essential design requirements.
FAQ
What is the maximum input voltage rating for the NCP512SQ25T1?
The NCP512SQ25T1 has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating input range is 2.8 V to 6.0 V - ensuring sufficient headroom above the 2.5 V output while staying within safe thermal limits at 80 mA load.
Does the NCP512SQ25T1 require an external resistor network to set its output voltage?
No, the NCP512SQ25T1 is a fixed-output regulator with factory-trimmed 2.5 V output. It contains internal resistive feedback and requires no external components to establish its nominal voltage - simplifying layout and reducing BOM count compared to adjustable LDOs.
Can the NCP512SQ25T1 operate with a 1 µF ceramic capacitor on both input and output?
Yes, the NCP512SQ25T1 is explicitly characterized and stabilized for use with 1.0 µF ceramic capacitors on both input and output pins. Its internal compensation eliminates ESR dependency, allowing low-cost, high-reliability X5R/X7R MLCCs without risk of oscillation.
What happens to quiescent current when the NCP512SQ25T1 enable pin is pulled low?
When the enable pin of the NCP512SQ25T1 is pulled below 0.3 V (logic low), the device enters ultra-low-power shutdown mode with quiescent current reduced to ≤0.1 µA. This state disables the output and halts all internal bias currents, making it ideal for deep-sleep system architectures.
Is thermal shutdown protection included in the NCP512SQ25T1?
Yes, the NCP512SQ25T1 incorporates internal thermal shutdown that activates at approximately 160°C junction temperature. Once triggered, the output is disabled until the die cools by ~20°C, preventing irreversible damage during sustained overload or inadequate PCB copper area.
NCP512SQ25T1 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)
NCP512SQ25T1 FAQ
1.How can I place an order for NCP512SQ25T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ25T1 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 NCP512SQ25T1 reliable?
The price and inventory of NCP512SQ25T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ25T1 is usually 5 days.
3.What payment methods are accepted for NCP512SQ25T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ25T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ25T1?
NCP512SQ25T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ25T1 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 NCP512SQ25T1?
For technical support, including NCP512SQ25T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ25T1 requirements.
6.How does Aetrix verify that NCP512SQ25T1 is sourced from the original manufacturer or authorized distributors?
All NCP512SQ25T1 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 NCP512SQ25T1 meets industry standards.
7.What is the process for return or replacement of NCP512SQ25T1?
All NCP512SQ25T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ25T1, 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 NCP512SQ25T1 part is unused and in its original packaging.
Return procedure for NCP512SQ25T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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