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onsemi NCP502SQ50T1G
- Part No.:
- NCP502SQ50T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP502SQ50T1G.pdf
- Description:
- IC REG LINEAR 5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:4,769
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Product details
Overview
NCP502SQ50T1G from onsemi is a fixed-output, low-quiescent-current CMOS LDO voltage regulator delivering 5.0 V at up to 80 mA with 40 µA typical quiescent current and ±2.0% output voltage accuracy over −40 °C to +85 °C. It features PMOS pass transistor architecture, ultra-low dropout (700 mV max at 80 mA), and operates from input voltages up to 12 V - ideal for battery-powered portable instrumentation requiring stable, low-power rail generation.
For engineers reviewing the NCP502SQ50T1G datasheet, pinout, applications, or equivalent options, key selection considerations include its SC70-5 package footprint, enable threshold logic (1.3 V high / 0.3 V low), thermal shutdown protection, and compatibility with low-ESR ceramic output capacitors as small as 1.0 µF.
Technical Context
The NCP502SQ50T1G implements a PMOS-based linear regulation architecture with internal voltage reference, error amplifier, and protection circuitry including current limit and thermal shutdown (trip ~160 °C). Its enable input supports active-high control with defined turn-on/turn-off thresholds, and it requires no minimum load for stability.
Designed for low-noise, low-power operation, the device achieves 55 dB ripple rejection at 1 kHz and 180 µVRMS output noise (100 Hz–100 kHz), while maintaining regulation across line (±0.4 mV/V) and load (±0.2 mV/mA) variations - enabling use in noise-sensitive analog and RF subsystems powered from shared battery rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2.0% - ensures reliable logic-level supply for 5 V microcontrollers and sensors without external trimming. |
| Max Output Current | 80 mA - sufficient for powering low-power MCU cores, ADCs, or interface ICs in handheld devices. |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on sensor nodes or standby circuits. |
| Dropout Voltage | 700 mV max at 80 mA - allows operation down to 5.7 V input while sustaining 5.0 V output, extending usable battery range. |
| Operating Temp Range | −40 °C to +85 °C - validated for industrial and consumer-grade portable equipment environments. |
| Ripple Rejection | 55 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Output Noise | 180 µVRMS (100 Hz–100 kHz) - preserves signal integrity in precision analog front-ends and audio paths. |
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 power supply input | 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 | Active-high enable control | Pull ≥1.3 V to activate regulator; pull ≤0.3 V to disable (reducing IQ to 0.1 µA); tie to Vin if unused. |
| 4 - N/C | No internal connection | Not bonded; may be left floating or grounded - no electrical function or thermal benefit. |
| 5 - Vout | Regulated 5.0 V output | Delivers stable 5.0 V to load; requires ≥1.0 µF ceramic output capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >10-year battery life in coin-cell–powered IoT endpoints. |
| Stable with ceramic capacitors | Supports 1.0 µF–10 µF ceramic output caps - eliminates need for costly tantalum or aluminum electrolytics. |
| Thermal shutdown protection | Internal circuit disables output above ~160 °C junction temperature - prevents catastrophic failure during overload or poor heatsinking. |
| High PSRR at 1 kHz | 55 dB rejection of switcher ripple allows clean 5 V rail even when fed from noisy buck converter outputs. |
| Accurate output voltage | ±2.0% initial tolerance ensures compatible logic levels without post-regulation calibration. |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
Use Scenario: Battery-powered pulse oximeter with analog front-end and BLE radio. IC Role / Device Role / Timing Role: Primary 5 V supply for op-amps, ADC, and microcontroller - regulating from single Li-ion cell (3.0–4.2 V) via boost+LDO architecture. Use Value: 40 µA quiescent current extends battery runtime between charges; 180 µVRMS noise avoids corruption of weak physiological signals. | Use Scenario: Ruggedized multimeter with LCD display and isolated serial interface. IC Role / Device Role / Timing Role: Clean 5 V rail for MCU, display driver, and RS-485 transceiver - derived from alkaline battery stack (6–9 V). Use Value: 700 mV dropout enables full 5 V output until battery depletes to 5.7 V; ±2.0% accuracy guarantees consistent display contrast and communication timing. |
| Wireless Remote Controls | Smart Home Sensor Nodes |
Use Scenario: Sub-GHz remote with accelerometer wake-up and LED feedback. IC Role / Device Role / Timing Role: Always-on 5 V regulator for RF SoC and motion sensor - enabled only during button press or motion event. Use Value: Enable pin with 1.3 V threshold integrates cleanly with GPIO; 0.1 µA shutdown current prevents battery drain during months of idle time. | Use Scenario: Zigbee temperature/humidity node powered by two AA cells. IC Role / Device Role / Timing Role: Secondary regulated 5 V source for USB-UART bridge and environmental sensor ICs - fed from primary 3.3 V LDO. Use Value: SC70-5 footprint saves board space in compact enclosures; 55 dB PSRR isolates sensor measurements from digital switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-5002E/MB | Same 5.0 V output, 250 mA rating, but higher 1.6 µA quiescent current; SOT-23-3 package (no enable pin). | Lacks enable control and has larger dropout (600 mV @ 250 mA); suitable only where higher current and simpler control suffice. | Select when >80 mA load current is required and enable functionality is unnecessary. |
| TPS70650DBVR | 5.0 V output, 150 mA, 1.7 µA IQ, integrated thermal/overcurrent protection; SOT-23-5 package with enable. | Lower IQ but higher cost; tighter 1% output tolerance; optimized for TI ecosystem designs. | Prefer when ultra-low IQ (<2 µA) is critical and TI reference designs or support are leveraged. |
Compared with MCP1700T-5002E/MB and TPS70650DBVR, the NCP502SQ50T1G offers the best balance of ultra-low IQ (40 µA), enable control, SC70-5 miniaturization, and proven robustness in portable battery systems - making it optimal for space-constrained, long-life consumer and industrial edge devices.
Availability
NCP502SQ50T1G is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered consumer electronics, and industrial handheld meters requiring stable component supply with guaranteed long-term availability.
Supply support for NCP502SQ50T1G 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 for automotive, industrial, cloud, and medical applications.
The NCP502 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for ultra-low-power, space-constrained portable equipment where battery longevity and signal integrity are critical design priorities.
FAQ
What is the maximum input voltage rating for the NCP502SQ50T1G?
The NCP502SQ50T1G has an absolute maximum input voltage rating of 12 V, as specified in the Maximum Ratings table. Operation beyond this voltage risks permanent damage. For reliable 5.0 V regulation, the recommended operating input range is 5.7 V to 12 V - ensuring sufficient headroom above the 700 mV dropout voltage at full 80 mA load. The device includes internal protection against overvoltage stress on the Vin pin.
Does the NCP502SQ50T1G require an external capacitor on the output pin?
Yes, the NCP502SQ50T1G requires a minimum 1.0 µF ceramic output capacitor connected directly between Vout (pin 5) and GND (pin 2) for stability and transient response. The datasheet confirms compatibility with ceramic capacitors across a wide ESR range (a few mΩ to 5 Ω), and larger values (e.g., 2.2–10 µF) improve load transient suppression and noise rejection. No minimum ESR or specific capacitor chemistry is mandated.
What is the function of Pin 4 (N/C) on the NCP502SQ50T1G SC70-5 package?
Pin 4 of the NCP502SQ50T1G is marked N/C (No Connection) and has no internal bond wire or circuit connection. It is electrically inert and thermally non-functional. The datasheet explicitly states it is a "true no connect" - meaning it may be left floating, tied to GND, or routed as a keep-out zone on the PCB. No performance benefit or thermal relief is gained by connecting it, and doing so introduces no risk.
How does the enable functionality work on the NCP502SQ50T1G?
The NCP502SQ50T1G uses an active-high enable input on Pin 3. When voltage on this pin rises to ≥1.3 V (typical), the regulator turns on and delivers 5.0 V to Vout. When pulled ≤0.3 V (typical), the output shuts down and quiescent current drops to 0.1 µA. If not used, Pin 3 must be connected to Vin to ensure continuous operation - floating the pin is not recommended due to potential noise-induced toggling.
Is the NCP502SQ50T1G suitable for automotive applications?
No, the NCP502SQ50T1G is rated for the industrial temperature range (−40 °C to +85 °C) and is not AEC-Q100 qualified. For automotive use, onsemi offers the pin-compatible NCV502SN50T1G variant - which carries the NCV prefix, is qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C), and supports PPAP documentation. The NCP502SQ50T1G should be restricted to consumer, industrial, and medical portable equipment.
NCP502SQ50T1G 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)
NCP502SQ50T1G FAQ
1.How can I place an order for NCP502SQ50T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SQ50T1G 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 NCP502SQ50T1G reliable?
The price and inventory of NCP502SQ50T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SQ50T1G is usually 5 days.
3.What payment methods are accepted for NCP502SQ50T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SQ50T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SQ50T1G?
NCP502SQ50T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SQ50T1G 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 NCP502SQ50T1G?
For technical support, including NCP502SQ50T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SQ50T1G requirements.
6.How does Aetrix verify that NCP502SQ50T1G is sourced from the original manufacturer or authorized distributors?
All NCP502SQ50T1G 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 NCP502SQ50T1G meets industry standards.
7.What is the process for return or replacement of NCP502SQ50T1G?
All NCP502SQ50T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SQ50T1G, 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 NCP502SQ50T1G part is unused and in its original packaging.
Return procedure for NCP502SQ50T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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