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onsemi NCP502SQ50T1
- Part No.:
- NCP502SQ50T1
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP502SQ50T1.pdf
- Description:
- IC REG LINEAR 5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:1,665
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Product details
Overview
NCP502SQ50T1 from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 5.0 V at up to 80 mA with 40 µA typical quiescent current and 850 mV typical dropout voltage at 80 mA. It features PMOS pass transistor architecture, ±2.0% output voltage accuracy over temperature, and operates across −40 °C to +85 °C for portable battery-powered instrumentation and handheld communication devices.
For engineers reviewing the NCP502SQ50T1 datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ for extended battery life, SC70-5 package footprint constraints, enable threshold compatibility (1.3 V high / 0.3 V low), and ceramic capacitor stability without ESR requirements.
Technical Context
The NCP502SQ50T1 implements a PMOS-based LDO topology with internal voltage reference, error amplifier, and thermal/overcurrent protection. Its ultra-low 40 µA quiescent current enables operation in always-on subsystems where standby power is critical.
Designed for single-supply battery inputs up to 12 V, it maintains regulation down to 850 mV input-to-output differential at full 80 mA load and delivers 55 dB ripple rejection at 1 kHz - enabling clean power delivery in noise-sensitive analog or RF sections of portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2.0% - ensures stable logic supply for 5 V microcontrollers or interface ICs without external feedback. |
| Max Output Current | 80 mA - sufficient for low-power sensors, LED drivers, or MCU peripherals in space-constrained designs. |
| Quiescent Current | 40 µA typical - extends battery runtime in sleep modes; ground current remains near constant across load. |
| Dropout Voltage | 850 mV @ 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. |
| Ripple Rejection | 55 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Operating Temp | −40 °C to +85 °C - supports industrial-grade portable equipment without derating. |
| Enable Threshold | 1.3 V (high), 0.3 V (low) - compatible with 1.8 V or 3.3 V GPIO control without level-shifting. |
Pinout & Package
Package: SC70-5 (Case 419A), 1.25 mm × 1.65 mm × 0.95 mm, Pb-free, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts 5.85 V to 12 V; requires local 1.0 µF ceramic decoupling. |
| 2 | GND | Power ground - must be low-impedance connection to minimize noise coupling and thermal resistance. |
| 3 | Enable | Logic-controlled on/off - pulled high to Vin enables regulation; pulled ≤0.3 V disables output and reduces IQ to 0.1 µA. |
| 4 | N/C | No internal connection - PCB trace may be omitted or left floating; no electrical function. |
| 5 | Vout | Regulated 5.0 V output - stable with 1.0 µF ceramic capacitor; ESR-insensitive for broad capacitor selection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - enables >1-year battery life in 10 µA average-load IoT endpoints using coin cells. |
| Ceramic capacitor stability | No minimum ESR requirement - eliminates need for tantalum or polymer capacitors; reduces BOM cost and size. |
| Thermal shutdown protection | Activates at ~160 °C - prevents damage during transient overload or poor PCB thermal design. |
| High PSRR at audio frequencies | 55 dB @ 1 kHz - preserves signal integrity in audio codec or ADC reference supplies. |
| Precision output accuracy | ±2.0% over −40 °C to +85 °C - avoids calibration overhead in factory programming of embedded systems. |
Applications
| Portable Medical Sensors | Wireless Remote Controls |
|---|---|
|
Use Scenario: Compact pulse oximeter using AAA batteries and low-power MCU with analog front-end. IC Role / Device Role / Timing Role: Primary 5 V supply for op-amps, ADC, and BLE radio transceiver. Use Value: 40 µA IQ extends battery life to >6 months; 850 mV dropout enables use until battery drops to 3.85 V. |
Use Scenario: Sub-GHz remote control with wake-on-RF and deep-sleep firmware states. IC Role / Device Role / Timing Role: Always-on 5 V rail for RF receiver and wake-up logic during 99% sleep duty cycle. Use Value: Enable pin allows full system shutdown (0.1 µA IQ); ±2% accuracy ensures consistent RF sensitivity across temperature. |
| Handheld Test Meters | Industrial Data Loggers |
|
Use Scenario: Battery-operated multimeter with LCD, precision reference, and serial interface. IC Role / Device Role / Timing Role: Clean 5 V source for 16-bit SAR ADC and display driver IC. Use Value: 55 dB ripple rejection isolates measurement circuitry from noisy digital supply; SC70-5 saves board area. |
Use Scenario: Ruggedized environmental logger deployed outdoors with wide ambient temperature swing. IC Role / Device Role / Timing Role: Main regulator for microcontroller, SD card interface, and sensor biasing. Use Value: −40 °C to +85 °C rating ensures reliability without derating; thermal shutdown protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/TT | 3.5 µA IQ, 250 mA max, SOT-23-3 (no enable) | Lacks enable pin and thermal shutdown; higher output current but larger package | Choose when ultra-low IQ dominates and enable control is unnecessary. |
| Torex XC6206P502MR-G | 1.0 µA IQ, 250 mA max, SOT-23-3 (no enable), ±2% accuracy | No enable or thermal protection; optimized for lowest possible standby power only | Prefer for coin-cell applications where 1 µA IQ justifies trade-offs in protection and control. |
Compared with MCP1700T-5002E/TT and XC6206P502MR-G, the NCP502SQ50T1 uniquely balances ultra-low IQ (40 µA), integrated enable functionality, thermal shutdown, and SC70-5 footprint - making it optimal for compact, battery-powered systems requiring both efficiency and robustness.
Availability
NCP502SQ50T1 is available at Aetrix Electronics and suitable for portable medical sensors, wireless remote controls, and handheld test meters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for NCP502SQ50T1 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP502SQ50T1 belongs to onsemi's low-IQ linear regulator product line, engineered specifically for battery-constrained portable electronics where minimal standby power and small form factor are primary design constraints.
FAQ
What is the maximum input voltage rating for the NCP502SQ50T1?
The NCP502SQ50T1 has an absolute maximum input voltage of 12 V. Operation above this level risks permanent damage. For reliable 5.0 V regulation, input should remain ≥5.85 V (5.0 V + 850 mV dropout) under full 80 mA load, and derating is recommended above 85 °C ambient.
Does the NCP502SQ50T1 require an external capacitor on the output?
Yes, the NCP502SQ50T1 requires a minimum 1.0 µF ceramic output capacitor for stability, as confirmed in the datasheet's Applications Information section. Unlike many older LDOs, it imposes no minimum ESR requirement - enabling use of low-cost X5R/X7R MLCCs without risk of oscillation.
Is the NCP502SQ50T1 pin-compatible with other variants in the NCP502 family?
Yes - all NCP502 variants in SC70-5 (SQ suffix) share identical pinout and package dimensions. The NCP502SQ50T1 uses pins 1 (Vin), 2 (GND), 3 (Enable), 4 (N/C), and 5 (Vout), matching NCP502SQ33T2G, NCP502SQ28T2G, and others in the SQ series.
What is the enable pin behavior when left unconnected on the NCP502SQ50T1?
If the enable pin (pin 3) is left floating, the NCP502SQ50T1 may power up unpredictably due to noise coupling. The datasheet explicitly states that unused enable pins must be tied to Vin to guarantee turn-on. Pulling it low disables the output and reduces quiescent current to 0.1 µA.
Can the NCP502SQ50T1 be used in automotive applications?
No - the NCP502SQ50T1 is rated for −40 °C to +85 °C and is not AEC-Q100 qualified. For automotive use, select the NCV502SN50T1G (TSOP-5, −40 °C to +125 °C, AEC-Q100 qualified), which shares electrical specs but differs in package and qualification status.
NCP502SQ50T1 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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.9V @ 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)
NCP502SQ50T1 FAQ
1.How can I place an order for NCP502SQ50T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SQ50T1 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 NCP502SQ50T1 reliable?
The price and inventory of NCP502SQ50T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SQ50T1 is usually 5 days.
3.What payment methods are accepted for NCP502SQ50T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SQ50T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SQ50T1?
NCP502SQ50T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SQ50T1 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 NCP502SQ50T1?
For technical support, including NCP502SQ50T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SQ50T1 requirements.
6.How does Aetrix verify that NCP502SQ50T1 is sourced from the original manufacturer or authorized distributors?
All NCP502SQ50T1 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 NCP502SQ50T1 meets industry standards.
7.What is the process for return or replacement of NCP502SQ50T1?
All NCP502SQ50T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SQ50T1, 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 NCP502SQ50T1 part is unused and in its original packaging.
Return procedure for NCP502SQ50T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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