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onsemi NCP502SQ25T1
- Part No.:
- NCP502SQ25T1
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP502SQ25T1.pdf
- Description:
- IC REG LINEAR 2.5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:2,218
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Product details
Overview
NCP502SQ25T1 from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 2.5 V at up to 80 mA with 40 µA typical quiescent current and 2.0% output voltage accuracy. It features PMOS pass transistor architecture, thermal shutdown, current limiting, and operates across −40 °C to +85 °C - designed for battery-powered handheld instruments requiring stable low-power supply regulation.
For engineers reviewing the NCP502SQ25T1 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (1000 mV max at 80 mA), enable threshold compatibility (1.3 V high / 0.3 V low), SC70-5 package thermal resistance (400 °C/W), and ceramic capacitor stability (1.0 µF input/output).
Technical Context
The NCP502SQ25T1 implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and protection circuits including thermal shutdown and current limit. Its ultra-low quiescent current stems from optimized biasing of the PMOS pass element and control circuitry, enabling operation in standby-sensitive portable systems.
It supports enable-controlled power sequencing with logic-compatible thresholds (1.3 V turn-on, 0.3 V turn-off) and maintains regulation under load transients up to 80 mA while rejecting 55 dB ripple at 1 kHz. The device requires no minimum ESR output capacitors and remains stable with 1.0 µF ceramic decoupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.0% - ensures compatible logic-level supply for 2.5 V I/O domains with guaranteed tolerance over temperature and load. |
| Max Output Current | 80 mA - sufficient for powering microcontrollers, sensors, or RF front-ends in compact portable devices. |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on monitoring applications with minimal standby drain. |
| Dropout Voltage | 1000 mV max at 80 mA - allows operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) sources. |
| Line Regulation | 0.4 mV/V typical - minimizes output variation during battery voltage sag, critical for precision analog subsystems. |
| Ripple Rejection | 55 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Operating Temp | −40 °C to +85 °C - meets industrial-grade environmental requirements without derating. |
Pinout & Package
Package: SC70-5 (Case 419A), 1.25 mm × 1.75 mm × 0.95 mm, Pb-free, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 2.8 V to 12 V unregulated input; must be decoupled with ≥1.0 µF ceramic capacitor near pin. |
| 2 - GND | Power ground reference | Low-impedance return path for input/output currents; requires solid PCB ground plane connection. |
| 3 - Enable | Logic-controlled on/off input | Pull ≥1.3 V to enable output; pull ≤0.3 V to disable (ultra-low IQ standby mode); float not allowed - tie to Vin if unused. |
| 4 - N/C | No internal connection | Not bonded internally; PCB trace may be omitted or left unconnected - no electrical function. |
| 5 - Vout | Regulated output | Delivers stable 2.5 V ±2.0%; requires ≥1.0 µF ceramic output capacitor placed adjacent to pin for transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends battery runtime in always-on IoT edge nodes without compromising regulation. |
| Ceramic capacitor compatible | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or aluminum electrolytics. |
| Thermal and current protection | Integrated shutdown at ~160 °C and foldback current limit - prevents damage during overload or poor heatsinking. |
| Enable-controlled sequencing | Logic-level compatible EN pin (1.3 V/0.3 V thresholds) - enables clean power-up/down coordination with microcontrollers. |
| High accuracy output | ±2.0% initial tolerance - reduces need for external trimming in precision analog signal chains. |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) sensor interface powered by coin cell. IC Role / Device Role / Timing Role: Primary 2.5 V supply for analog front-end and low-power MCU core. Use Value: 40 µA quiescent current enables >3-year battery life; ±2.0% output accuracy ensures consistent ADC reference scaling. | Use Scenario: Heart rate and motion sensing module in wrist-worn device. IC Role / Device Role / Timing Role: Regulated 2.5 V rail for optical sensor array and BLE SoC I/O domain. Use Value: SC70-5 footprint saves board space; 1000 mV dropout allows operation down to 3.5 V battery voltage. |
| Handheld Test Instruments | Industrial Data Loggers |
Use Scenario: Battery-operated multimeter with LCD and precision measurement circuitry. IC Role / Device Role / Timing Role: Low-noise 2.5 V supply for 16-bit SAR ADC reference and op-amp biasing. Use Value: 180 µVrms output noise and 55 dB ripple rejection preserve measurement SNR in noisy environments. | Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 minutes. IC Role / Device Role / Timing Role: Always-on 2.5 V regulator enabling RTC and wake-up controller during deep sleep. Use Value: −40 °C to +85 °C rating ensures field reliability; enable pin allows host MCU to gate power to peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/MB | 3.0 µA IQ (lower), 250 mA output (higher), SOT-23-3 (no enable) | Lacks enable pin and thermal shutdown; unsuitable for sequenced or fault-prone systems | Select when ultra-low IQ dominates and enable/control is handled externally |
| TPS7A0525PDBVR | 250 nA IQ (much lower), 200 mA output, 0.65 V dropout (lower), SOT-23-5 (enable) | Higher cost, tighter 1% accuracy, but requires 0.65 V headroom vs. NCP502SQ25T1's 1.0 V | Select for sub-mA standby systems where input voltage margin is constrained |
Compared with MCP1700T-2502E/MB and TPS7A0525PDBVR, the NCP502SQ25T1 offers balanced trade-offs: moderate IQ (40 µA), integrated enable and protection, SC70-5 size, and proven 2.5 V stability - ideal for cost-sensitive, space-constrained portable designs needing robustness without ultra-low-IQ complexity.
Availability
NCP502SQ25T1 is available at Aetrix Electronics and suitable for portable medical sensors, wearable electronics, handheld test equipment, and industrial data loggers requiring stable component supply with long-term manufacturability assurance.
Supply support for NCP502SQ25T1 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP502SQ25T1 belongs to the NCP502 series of low-IQ CMOS LDO regulators, engineered specifically for battery-powered handheld equipment demanding ultra-low standby current and small-footprint packaging.
FAQ
What is the maximum input voltage rating for the NCP502SQ25T1?
The NCP502SQ25T1 has an absolute maximum input voltage (Vin) rating of 12 V, as specified in the Maximum Ratings table. Operation above this level risks permanent damage. For reliable long-term use, design input voltage within the recommended operating range of 2.8 V to 12 V, ensuring sufficient headroom above the 2.5 V output to maintain regulation - e.g., ≥3.5 V minimum for 80 mA load given its 1000 mV dropout.
Does the NCP502SQ25T1 require an external capacitor on the output pin?
Yes, the NCP502SQ25T1 requires a minimum 1.0 µF ceramic output capacitor (Cout) connected directly between Vout and GND, as confirmed in the Applications Information section. This capacitor ensures stability under load transients and improves ripple rejection. Larger values (e.g., 2.2–10 µF) further enhance performance but are not mandatory. The device is stable with low-ESR ceramics and does not require a specific ESR range.
Can the NCP502SQ25T1 be used in automotive applications?
The NCP502SQ25T1 is rated for −40 °C to +85 °C ambient operation and is not AEC-Q100 qualified. For automotive applications, onsemi offers the pin-compatible NCV502SN25T1G (TSOP-5) variant, which carries the NCV prefix, meets AEC-Q100 Grade 1 requirements (−40 °C to +125 °C), and is PPAP capable. The NCP502SQ25T1 should be limited to industrial or consumer-grade automotive-adjacent systems where full qualification is not mandated.
What is the purpose of Pin 4 (N/C) on the NCP502SQ25T1 SC70-5 package?
Pin 4 of the NCP502SQ25T1 is designated N/C (No Connection) and has no internal bond wire or circuit connection. It is electrically isolated and serves only as a mechanical placeholder in the SC70-5 leadframe. PCB layout may omit the pad or leave it unconnected - routing traces to this pin provides no functional benefit and is discouraged per the datasheet note stating "True no connect. Printed circuit board traces are allowable."
How does the enable functionality work on the NCP502SQ25T1?
The NCP502SQ25T1's Enable pin (Pin 3) controls output activation: pulling the pin to ≥1.3 V (typical) turns the regulator on; pulling it to ≤0.3 V (typical) disables output and reduces quiescent current to <0.1 µA. If unused, the datasheet mandates connecting Enable to Vin - floating the pin is undefined and may cause erratic behavior. This logic-level interface enables precise power sequencing in multi-rail systems.
NCP502SQ25T1 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):
- 12V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- 55dB (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)
NCP502SQ25T1 FAQ
1.How can I place an order for NCP502SQ25T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SQ25T1 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 NCP502SQ25T1 reliable?
The price and inventory of NCP502SQ25T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SQ25T1 is usually 5 days.
3.What payment methods are accepted for NCP502SQ25T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SQ25T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SQ25T1?
NCP502SQ25T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SQ25T1 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 NCP502SQ25T1?
For technical support, including NCP502SQ25T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SQ25T1 requirements.
6.How does Aetrix verify that NCP502SQ25T1 is sourced from the original manufacturer or authorized distributors?
All NCP502SQ25T1 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 NCP502SQ25T1 meets industry standards.
7.What is the process for return or replacement of NCP502SQ25T1?
All NCP502SQ25T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SQ25T1, 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 NCP502SQ25T1 part is unused and in its original packaging.
Return procedure for NCP502SQ25T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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