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onsemi NCP502SQ27T1G
- Part No.:
- NCP502SQ27T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP502SQ27T1G.pdf
- Description:
- IC REG LINEAR 2.7V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:4,781
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Product details
Overview
NCP502SQ27T1G from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 2.7 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 (850 mV at 80 mA), and integrated thermal/overcurrent protection - optimized for battery-powered handheld instruments and portable consumer electronics.
For engineers reviewing the NCP502SQ27T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its SC70-5 package footprint, enable threshold compatibility (1.3 V high / 0.3 V low), ceramic capacitor stability, and industrial temperature range without requiring external compensation.
Technical Context
The NCP502SQ27T1G implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and protection circuitry - enabling stable regulation with minimal headroom. Its enable input controls device state via logic-level thresholds, and it operates without minimum load or ESR constraints on the output capacitor.
Designed for low-noise, low-power systems, the device achieves 55 dB ripple rejection at 1 kHz and 180 µVRMS output noise (100 Hz–100 kHz). Dropout voltage remains ≤850 mV across full temperature and load range (−40 °C to +85 °C, 0–80 mA), supporting operation from single-cell Li-ion or multi-cell alkaline sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7 V ±2.0% at 10 mA, maintained across −40 °C to +85 °C ambient - ensures stable MCU core or sensor bias under battery discharge. |
| Quiescent Current | 40 µA typical (Enable = Vin); 0.1 µA in shutdown - extends battery life in always-on monitoring circuits. |
| Dropout Voltage | 850 mV max at 80 mA and full temperature range - allows regulation from 3.55 V input down to end-of-life battery voltages. |
| Line Regulation | 0.4 mV/V typical - minimizes output drift during input supply fluctuations (e.g., USB port variation or battery sag). |
| Load Regulation | 0.2 mV/mA typical - maintains tight voltage control across dynamic load steps (e.g., RF transmit bursts). |
| 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) - suitable for noise-sensitive analog sensors and ADC references. |
Pinout & Package
Package: SC70-5 (Case 419A), micro-miniature surface-mount, 1.25 mm × 1.65 mm × 0.95 mm profile - enables high-density PCB layouts in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 2.7 V to 12 V input; must be decoupled with ≥1.0 µF ceramic capacitor near pin for transient stability. |
| 2 - GND | Power ground reference | Low-impedance return path for both input and output currents; requires solid copper pour to minimize noise coupling. |
| 3 - Enable | Logic-controlled on/off input | Active-high enable (1.3 V threshold); pull to Vin for always-on operation or drive low for <0.1 µA shutdown current. |
| 4 - N/C | No internal connection | Not bonded internally; PCB trace may be omitted or left floating - no electrical function or thermal impact. |
| 5 - Vout | Regulated output voltage | Delivers 2.7 V ±2.0% to load; supports ceramic or tantalum output capacitors ≥1.0 µF with ESR up to 5 Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical operating current enables >1-year battery life in 10 µA average-load IoT endpoints. |
| Ceramic capacitor compatible | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or aluminum electrolytics. |
| Thermal & current protection | Internal foldback current limit and thermal shutdown at ~160 °C prevent damage during overload or poor heatsinking. |
| Industrial temperature range | Specified from −40 °C to +85 °C - supports deployment in automotive cabins, outdoor meters, and industrial handhelds. |
| Low output voltage option | 2.7 V output matches common low-voltage MCU I/O rails and sensor supply requirements without external dividers. |
Applications
| Portable Medical Sensors | Wearable Fitness Monitors |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using ultra-low-power analog front-end and BLE SoC. IC Role / Device Role: Primary 2.7 V supply for op-amps, ADC, and BLE radio core voltage domain. Use Value: 40 µA quiescent current extends coin-cell lifetime beyond 6 months; 180 µVRMS noise avoids signal corruption in sub-mV biosensor measurements. |
Use Scenario: Optical heart-rate sensor module with photodiode array and pulse-width modulated LED drivers. IC Role / Device Role: Clean, stable 2.7 V rail for analog signal chain and low-voltage logic interface. Use Value: 55 dB ripple rejection isolates sensitive analog stages from noisy DC-DC converter outputs; SC70-5 footprint saves board area in wrist-worn form factor. |
| Handheld Test Instruments | Smart Home Remote Sensors |
|
Use Scenario: Battery-powered multimeter with LCD display, precision reference, and auto-ranging circuitry. IC Role / Device Role: Precision 2.7 V supply for 24-bit delta-sigma ADC reference and display driver IC. Use Value: ±2.0% output accuracy and <0.4 mV/V line regulation ensure measurement repeatability across varying battery voltage (3.0–4.2 V). |
Use Scenario: Zigbee-enabled temperature/humidity node powered by two AA alkaline cells. IC Role / Device Role: Main 2.7 V regulator for MCU, RF transceiver, and digital sensor interface. Use Value: 850 mV dropout enables full operational range down to 3.55 V input - extending usable battery life through 1.75 V/cell endpoint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2702E/TT | 250 mA output, 1.6 µA quiescent current, SOT-23-3 package (no enable) | Lacks enable control and thermal shutdown; higher output current but larger dropout (600 mV @ 250 mA) | Choose when ultra-low IQ dominates and enable/shutdown is unnecessary; verify thermal margin at 80 mA in SOT-23-3. |
| Torex XC6206P272MR-G | 150 mA output, 1 µA IQ, SOT-25 package with enable, ±2% accuracy | Higher max current and lower IQ, but 1.2 V min input limits use below 3.9 V input; no automotive qualification | Prefer for longer battery life in new designs where input stays >3.9 V; not suitable for wide-input or automotive-grade use. |
Compared with MCP1700T-2702E/TT and XC6206P272MR-G, the NCP502SQ27T1G offers balanced trade-offs: robust enable functionality, guaranteed thermal protection, and validated performance down to 2.7 V input - making it optimal for legacy-compatible, safety-aware portable designs where pin count and reliability outweigh raw IQ minimization.
Availability
NCP502SQ27T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness monitors, handheld test instruments, and smart home remote sensors requiring stable component supply with long-term manufacturability assurance.
Supply support for NCP502SQ27T1G 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, and sensing solutions for automotive, industrial, and portable electronics.
The NCP502 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated devices demanding ultra-low quiescent current, small footprint, and robust protection - without sacrificing output accuracy or noise performance.
FAQ
What is the maximum input voltage rating for the NCP502SQ27T1G?
The NCP502SQ27T1G has an absolute maximum input voltage 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 to remain within 2.7 V to 12 V, with recommended derating for thermal management at high load currents.
Does the NCP502SQ27T1G require an external output capacitor, and what type is recommended?
Yes, the NCP502SQ27T1G requires a minimum 1.0 µF output capacitor for stability. Ceramic X5R or X7R types (e.g., TDK C1608X5R1A105K) are explicitly qualified and preferred due to low ESR and size efficiency. Tantalum capacitors are also supported, but ceramic offers superior transient response and reliability in portable applications.
Can the NCP502SQ27T1G be used without connecting the Enable pin?
Yes - if the Enable function is unused, the NCP502SQ27T1G datasheet specifies that the Enable pin must be connected directly to Vin to ensure normal operation. Leaving it floating may cause unpredictable behavior or oscillation due to noise coupling into the high-impedance input.
What is the dropout voltage of the NCP502SQ27T1G at 80 mA and 85 °C?
The dropout voltage of the NCP502SQ27T1G is 850 mV maximum at 80 mA load and across the full operating temperature range (−40 °C to +85 °C), as confirmed in the Electrical Characteristics table under "Dropout Voltage" for 2.7 V–2.9 V output variants. This value is measured when Vout drops 3.0% below nominal.
Is the NCP502SQ27T1G RoHS-compliant and lead-free?
Yes, the NCP502SQ27T1G is a Pb-Free device, as stated in the Features section and confirmed in the Ordering Information table (suffix "G" denotes Pb-Free packaging). It complies with RoHS Directive 2011/65/EU and meets JEDEC J-STD-020 moisture sensitivity level MSL3 for reflow compatibility.
NCP502SQ27T1G 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):
- 2.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 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)
NCP502SQ27T1G FAQ
1.How can I place an order for NCP502SQ27T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SQ27T1G 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 NCP502SQ27T1G reliable?
The price and inventory of NCP502SQ27T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SQ27T1G is usually 5 days.
3.What payment methods are accepted for NCP502SQ27T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SQ27T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SQ27T1G?
NCP502SQ27T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SQ27T1G 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 NCP502SQ27T1G?
For technical support, including NCP502SQ27T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SQ27T1G requirements.
6.How does Aetrix verify that NCP502SQ27T1G is sourced from the original manufacturer or authorized distributors?
All NCP502SQ27T1G 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 NCP502SQ27T1G meets industry standards.
7.What is the process for return or replacement of NCP502SQ27T1G?
All NCP502SQ27T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SQ27T1G, 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 NCP502SQ27T1G part is unused and in its original packaging.
Return procedure for NCP502SQ27T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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