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onsemi NCP502SQ27T2G
- Part No.:
- NCP502SQ27T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP502SQ27T2G.pdf
- Description:
- IC REG LINEAR 2.7V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
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Product details
Overview
NCP502SQ27T2G 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, 2.0% output voltage accuracy, and 850 mV dropout (at 80 mA, TA = −40 °C to +85 °C). It serves as a power management IC in portable battery-powered systems requiring stable low-voltage rail generation.
For engineers reviewing the NCP502SQ27T2G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ for extended battery life, SC70-5 package compatibility with space-constrained PCB layouts, thermal shutdown protection, and enable-controlled standby mode with 1.3 V/0.3 V logic thresholds.
Technical Context
The NCP502SQ27T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and internal protection circuits (current limit, thermal shutdown) in a single die. Its architecture enables stable regulation with ceramic output capacitors as low as 1.0 µF and eliminates ESR requirements.
It operates across an input voltage range of 1.3 V to 12 V, supports industrial temperature range (−40 °C to +85 °C), and features logic-level enable control with hysteresis-turning on when Enable ≥ 1.3 V and off when Enable ≤ 0.3 V-ensuring robust noise immunity in handheld environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7 V ±2.0% (±54 mV) over temperature and load ensures stable MCU core or sensor supply rail. |
| Quiescent Current | 40 µA typical (0.1 µA max in shutdown) minimizes battery drain during idle/sleep modes in portable devices. |
| Dropout Voltage | 850 mV at 80 mA load (TA = −40 °C to +85 °C) allows operation from single-cell Li-ion or alkaline sources down to ~3.55 V. |
| Line Regulation | 0.4 mV/V typical enables stable output despite input ripple or battery voltage sag under varying load conditions. |
| Load Regulation | 0.2 mV/mA typical maintains tight output tolerance across 1–80 mA load changes, critical for mixed-signal SoC power domains. |
| Ripple Rejection | 55 dB at 1 kHz suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Thermal Shutdown | Activates at ~160 °C junction temperature, protecting against sustained overload or poor PCB thermal design. |
Pinout & Package
Package: SC70-5 (Case 419A), micro-miniature surface-mount, 1.25 mm × 1.65 mm × 0.95 mm, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 1.3 V to 12 V unregulated input; requires local 1.0 µF decoupling capacitor for stability and transient response. |
| 2 - GND | Power supply ground reference | Must be connected to low-impedance system ground plane; shared return path for input/output currents and internal bias. |
| 3 - Enable | Logic-controlled enable input | Pull high ≥1.3 V to activate regulator; pull low ≤0.3 V to disable (IQ drops to 0.1 µA); unused pin must tie to Vin. |
| 4 - N/C | No internal connection | Not bonded; no electrical function-PCB trace may be omitted or left floating per layout best practices. |
| 5 - Vout | Regulated output voltage | Delivers 2.7 V ±2.0% to load; requires 1.0 µF ceramic output capacitor placed adjacent to pin for optimal noise and transient performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >1-year battery life in always-on IoT sensors powered by coin cells. |
| Ceramic capacitor compatible | Stable with 1.0 µF output capacitance and zero minimum ESR requirement simplifies BOM and reduces board area vs. tantalum alternatives. |
| Enable-controlled standby | 1.3 V/0.3 V threshold hysteresis prevents oscillation near logic transition points and supports direct GPIO interfacing. |
| Integrated protection | Current limiting and thermal shutdown prevent damage during short-circuit or high ambient temperature operation without external circuitry. |
| High output accuracy | ±2.0% initial tolerance over full temperature and load range ensures reliable operation of 2.7 V–tolerant microcontrollers and analog peripherals. |
Applications
| Wearable Health Monitor | Bluetooth LE Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG signal acquisition using ultra-low-power MCU and analog front-end, powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 2.7 V power rail regulator supplying MCU core, ADC, and op-amps with minimal self-consumption. Use Value: 40 µA IQ extends battery life beyond 18 months while maintaining ±54 mV output stability across body-temperature variations. |
Use Scenario: Compact environmental sensor (temp/humidity/pressure) transmitting data via Bluetooth Low Energy every 5 seconds. IC Role / Device Role / Timing Role: Standby-mode LDO enabling rapid wake-up from deep sleep with sub-10 µs enable response time. Use Value: Enable pin logic thresholds eliminate need for level-shifting; SC70-5 footprint fits within 3×3 mm module envelope. |
| Handheld Barcode Scanner | Industrial Wireless Transmitter |
|
Use Scenario: Battery-operated laser scanner with intermittent high-current pulse (laser diode, motor, decoder IC). IC Role / Device Role / Timing Role: Local 2.7 V regulator isolating sensitive logic from noisy power transients generated by motor drive. Use Value: 55 dB ripple rejection at 1 kHz attenuates motor commutation noise; 0.2 mV/mA load regulation preserves decode accuracy. |
Use Scenario: DIN-rail mounted wireless transmitter operating in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Secondary regulated supply for RF transceiver and microcontroller, derived from 12 V industrial bus. Use Value: −40 °C to +85 °C operating range and 850 mV dropout ensure reliable startup and regulation even at cold start or low-bus conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2702E/TT | 250 mA output, 1.6 µA IQ, SOT-23-3 package (no enable), 600 mV dropout at 250 mA | Lacks enable control and N/C pin; higher output current but larger footprint and different pinout | Select when enable functionality is unnecessary and higher load current is required with lower IQ. |
| TLC7701QDBVRQ1 | Automotive-grade (AEC-Q100), 150 mA, 35 µA IQ, TSOP-5 package, 1.2 V enable threshold | Qualified for automotive use; tighter enable threshold spec but same SC70-5-compatible pinout as NCP502SQ27T2G | Select for automotive or harsh-environment designs requiring PPAP support and extended temperature validation. |
Compared with MCP1700T-2702E/TT, NCP502SQ27T2G provides enable control and smaller SC70-5 size but lower output current; versus TLC7701QDBVRQ1, it offers broader commercial temperature range and lower cost, though without AEC-Q100 certification.
Availability
NCP502SQ27T2G is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, handheld barcode scanners, and industrial wireless transmitters requiring stable component supply with long-term lifecycle assurance.
Supply support for NCP502SQ27T2G 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, with leadership in power management, analog, and sensing technologies.
The NCP502 series was designed specifically for handheld communication equipment and portable battery-powered applications demanding ultra-low quiescent current and small-footprint packaging.
FAQ
What is the maximum input voltage rating for the NCP502SQ27T2G?
The NCP502SQ27T2G has an absolute maximum input voltage rating of 12 V. Operation above this level risks permanent damage. For reliable continuous operation, input voltage should remain within 1.3 V to 12 V, with recommended derating above 85 °C ambient to maintain safe junction temperature.
Does the NCP502SQ27T2G require an external output capacitor, and what value is recommended?
Yes, the NCP502SQ27T2G requires an external output capacitor for stability and transient performance. The datasheet specifies a minimum of 1.0 µF ceramic capacitor placed adjacent to the Vout pin. Larger values improve load transient response and noise rejection, and the device remains stable across ESR values from a few mΩ up to 5.0 Ω.
Can the NCP502SQ27T2G be used without connecting the Enable pin?
Yes-the Enable pin of the NCP502SQ27T2G can be left unconnected only if tied directly to Vin via a short PCB trace. The datasheet explicitly states that unused Enable pins must be connected to Vin to ensure normal operation; floating the pin may cause unpredictable behavior or failure to regulate.
What is the dropout voltage of the NCP502SQ27T2G at 80 mA and full temperature range?
The dropout voltage of the NCP502SQ27T2G is specified as 850 mV at 80 mA load current across the full operating temperature range of −40 °C to +85 °C. This value is measured when Vout drops 3.0% below nominal (i.e., to 2.619 V), ensuring regulation is maintained under worst-case thermal and load conditions.
Is the NCP502SQ27T2G pin-compatible with other variants in the NCP502 family?
Yes-all SC70-5 packaged NCP502 variants (e.g., NCP502SQ15T2G, NCP502SQ33T2G) share identical pinout, package dimensions, and thermal characteristics. Only the output voltage and marking code differ; no PCB redesign is needed when substituting between fixed-voltage versions in the SQ suffix series.
NCP502SQ27T2G 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)
NCP502SQ27T2G FAQ
1.How can I place an order for NCP502SQ27T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP502SQ27T2G 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 NCP502SQ27T2G reliable?
The price and inventory of NCP502SQ27T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP502SQ27T2G is usually 5 days.
3.What payment methods are accepted for NCP502SQ27T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP502SQ27T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP502SQ27T2G?
NCP502SQ27T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP502SQ27T2G 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 NCP502SQ27T2G?
For technical support, including NCP502SQ27T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP502SQ27T2G requirements.
6.How does Aetrix verify that NCP502SQ27T2G is sourced from the original manufacturer or authorized distributors?
All NCP502SQ27T2G 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 NCP502SQ27T2G meets industry standards.
7.What is the process for return or replacement of NCP502SQ27T2G?
All NCP502SQ27T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP502SQ27T2G, 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 NCP502SQ27T2G part is unused and in its original packaging.
Return procedure for NCP502SQ27T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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