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onsemi NCP502SQ37T2G
- Part No.:
- NCP502SQ37T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP502SQ37T2G.pdf
- Description:
- IC REG LINEAR 3.7V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:2,564
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Product details
Overview
NCP502SQ37T2G from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 3.7 V at up to 80 mA output current in SC70-5 package. It features 40 µA typical quiescent current, ±2.0% output voltage accuracy over −40 °C to +85 °C, and 850 mV dropout at 80 mA (3.7 V version), designed for battery-powered portable electronics requiring stable low-power bias.
For engineers reviewing the NCP502SQ37T2G datasheet, pinout, applications, or equivalent options, key selection considerations include ultra-low IQ for extended battery life, SC70-5 footprint constraints, enable threshold compatibility (1.3 V high / 0.3 V low), ceramic capacitor stability, and thermal derating in compact handheld PCB layouts.
Technical Context
The NCP502SQ37T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection. Its architecture enables stable regulation with 1.0 µF ceramic input/output capacitors and supports fast enable/disable transitions with defined logic thresholds.
It operates across 1.3 V to 12 V input range, maintains regulation down to 850 mV dropout at full load, and delivers 180 µVRMS output noise (100 Hz–100 kHz) - critical for noise-sensitive analog and RF subsystems in portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.7 V ±2.0% (ensures stable MCU core or sensor bias within tolerance across temp and load) |
| Max Output Current | 80 mA (supports low-power microcontrollers, sensors, or RF front-end ICs) |
| Quiescent Current | 40 µA typical (enables >1-year battery life in always-on IoT nodes with 200 mAh coin cell) |
| Dropout Voltage | 850 mV at 80 mA (allows operation from single Li-ion cell down to ~4.55 V before dropout) |
| Line Regulation | 0.4 mV/V (minimizes output drift during battery discharge or supply ripple) |
| Load Regulation | 0.2 mV/mA (holds output within ±16 mV across full 0–80 mA load range) |
| Ripple Rejection | 55 dB at 1 kHz (attenuates switching converter noise feeding into analog signal chains) |
| Operating Temp | −40 °C to +85 °C (suitable for consumer and industrial ambient environments) |
Pinout & Package
Package: SC70-5 (Case 419A), 1.25 mm × 1.65 mm × 0.95 mm, Pb-free, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 1.3 V to 12 V; must be decoupled with ≥1.0 µF ceramic capacitor near pin |
| 2 - GND | Power ground reference | Low-impedance return path; requires wide trace and direct connection to ground plane |
| 3 - Enable | Logic-controlled regulator enable | Active-high: ≥1.3 V turns on; ≤0.3 V disables; float not allowed - tie to Vin if unused |
| 4 - N/C | No internal connection | Not bonded; PCB pad may be omitted or left unconnected (no routing required) |
| 5 - Vout | Regulated output voltage | Delivers 3.7 V ±2%; requires ≥1.0 µF ceramic output capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends battery runtime in always-on wearable sensors |
| Ceramic capacitor compatible | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or large electrolytics |
| Enable control with defined thresholds | 1.3 V turn-on / 0.3 V turn-off - interfaces directly with 1.8 V or 3.3 V GPIO without level shifters |
| Thermal shutdown protection | Activates at ~160 °C - prevents damage during transient overload or poor PCB heat sinking |
| High PSRR at 1 kHz | 55 dB - suppresses noise from DC-DC converters powering mixed-signal SoCs |
| Industrial temperature range | −40 °C to +85 °C - validated for operation in outdoor consumer devices and factory-floor instruments |
Applications
| Wearable Health Monitor | Bluetooth LE Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing powered by CR2032 coin cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 3.7 V LDO supplying analog front-end and BLE SoC core domain. Use Value: 40 µA IQ enables >3 years of standby operation; ±2% accuracy ensures ADC reference stability across body-temperature variations. |
Use Scenario: Battery-operated environmental sensor transmitting temperature/humidity via Bluetooth every 5 seconds. IC Role / Device Role / Timing Role: Low-noise 3.7 V rail for precision ADC and RF transceiver analog sections. Use Value: 180 µVRMS output noise prevents quantization errors; 55 dB PSRR isolates RF switching noise from measurement chain. |
| Portable Barcode Scanner | Smart Remote Control |
|
Use Scenario: Handheld scanner using laser diode and CMOS imager, powered by two AA alkaline cells. IC Role / Device Role / Timing Role: Fixed 3.7 V regulator for image sensor and decode processor I/O rails. Use Value: 850 mV dropout allows operation until battery drops to ~4.55 V; SC70-5 footprint saves space in slim ergonomic housing. |
Use Scenario: IR/RF remote with motion wake-up and voice command, running on AAA batteries. IC Role / Device Role / Timing Role: Always-on 3.7 V supply for accelerometer, mic preamp, and low-power MCU sleep domain. Use Value: Enable pin allows MCU to cut regulator power during deep sleep, reducing system IQ to sub-µA levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3702E/TT | 450 mV dropout at 250 mA; 1.6 µA IQ; SOT-23-3 (no enable) | Lacks enable pin and thermal protection; higher max current but larger dropout at 3.7 V | Choose when ultra-low IQ dominates and enable control is unnecessary |
| Torex XC6206P372MR-G | 120 mV dropout at 80 mA; 1 µA IQ; SOT-23-5 (enable-compatible) | Lower dropout enables deeper battery utilization; lower IQ extends runtime further | Prefer when minimum input voltage headroom is critical and enable timing matches NCP502SQ37T2G |
Compared with MCP1700T-3702E/TT and XC6206P372MR-G, the NCP502SQ37T2G offers balanced trade-offs: moderate dropout (850 mV), robust enable interface (1.3 V/0.3 V thresholds), integrated thermal shutdown, and proven ceramic-stability - making it optimal for cost-constrained, space-limited portable designs needing reliability and ease of use.
Availability
NCP502SQ37T2G is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, portable barcode scanners, smart remote controls, and handheld test instruments requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for NCP502SQ37T2G 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 management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP502 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-powered portable electronics where ultra-low quiescent current, small footprint, and ceramic capacitor compatibility are essential design requirements.
FAQ
What is the maximum input voltage rating for the NCP502SQ37T2G?
The NCP502SQ37T2G has an absolute maximum input voltage of 12 V, as specified in the Maximum Ratings table. Operation above this voltage risks permanent device damage. For reliable long-term use, design input rails to stay within 1.3 V to 12 V, with recommended derating for thermal management at high load currents and ambient temperatures.
Does the NCP502SQ37T2G require external capacitors, and what values are recommended?
Yes, the NCP502SQ37T2G requires both input (Cin) and output (Cout) capacitors. The datasheet specifies 1.0 µF ceramic capacitors for both positions, placed as close as possible to the respective pins. Larger values improve transient response and noise rejection; X5R or X7R dielectrics are recommended for stable capacitance across voltage and temperature.
Is the NCP502SQ37T2G pin-compatible with other variants in the NCP502 family?
Yes, all SC70-5 packaged NCP502 variants (e.g., NCP502SQ33T2G, NCP502SQ34T2G) share identical pinout and package dimensions. The only functional difference is nominal output voltage; electrical characteristics such as IQ, dropout, and enable thresholds remain consistent across the SQ-suffix family.
What is the thermal resistance (RJA) of the NCP502SQ37T2G in its SC70-5 package?
The NCP502SQ37T2G in SC70-5 (Case 419A) has a junction-to-ambient thermal resistance (RJA) of 400 °C/W under standard test conditions (single component on 80 × 80 × 15 mm FR4 PCB with 1 oz copper). This value assumes minimal copper spreading; actual board layout significantly impacts real-world thermal performance.
Can the NCP502SQ37T2G be used in automotive applications?
The NCP502SQ37T2G is rated for −40 °C to +85 °C and is not AEC-Q100 qualified. For automotive use, select the NCV502SN37T1G variant (TSOP-5, AEC-Q100 Grade 1, −40 °C to +125 °C). The NCP502SQ37T2G is intended for consumer and industrial portable equipment, not under-hood or safety-critical vehicle systems.
NCP502SQ37T2G 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):
- 3.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.2V @ 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)
NCP502SQ37T2G FAQ
1.How can I place an order for NCP502SQ37T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SQ37T2G 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 NCP502SQ37T2G reliable?
The price and inventory of NCP502SQ37T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SQ37T2G is usually 5 days.
3.What payment methods are accepted for NCP502SQ37T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SQ37T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SQ37T2G?
NCP502SQ37T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SQ37T2G 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 NCP502SQ37T2G?
For technical support, including NCP502SQ37T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SQ37T2G requirements.
6.How does Aetrix verify that NCP502SQ37T2G is sourced from the original manufacturer or authorized distributors?
All NCP502SQ37T2G 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 NCP502SQ37T2G meets industry standards.
7.What is the process for return or replacement of NCP502SQ37T2G?
All NCP502SQ37T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SQ37T2G, 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 NCP502SQ37T2G part is unused and in its original packaging.
Return procedure for NCP502SQ37T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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