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onsemi NCP553SQ27T1G
- Part No.:
- NCP553SQ27T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP553SQ27T1G.pdf
- Description:
- IC REG LINEAR 2.7V 80MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
NCP553SQ27T1G from onsemi is a fixed-output, NOCAP low-dropout linear regulator delivering 2.7 V at up to 80 mA with ultra-low quiescent current (2.8 µA typical), housed in the SC82-AB (SC70-4) surface-mount package. It operates without an output capacitor, supports industrial temperature range (−40 °C to +85 °C), and targets battery-powered portable electronics requiring minimal standby power.
For engineers reviewing the NCP553SQ27T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 80 mA (750 mV typ.), ±2.0% output voltage accuracy, no-output-capacitor operation, thermal shutdown protection, and Pb-free SC82-AB packaging for space-constrained designs.
Technical Context
The NCP553SQ27T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and internal protection circuits (current limit and thermal shutdown). Its NOCAP architecture eliminates mandatory output capacitance, enabling stable regulation with only input decoupling - ideal for ultra-low-power wake-up and sleep-mode operation.
It features enable-controlled standby mode (logic-low disables regulator), operates across 12 V max input, maintains regulation down to 2.7 V output with 750 mV typical dropout at full load, and exhibits 90 µVRMS output noise (20 Hz–100 kHz) with 100 ppm/°C temperature coefficient - all verified over −40 °C to +85 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7 V ±2.0% (ensures stable rail for 2.7 V–3.0 V logic or analog circuitry) |
| Max Output Current | 80 mA (supports low-power microcontrollers, sensors, and RF front-ends) |
| Quiescent Current | 2.8 µA typical (enables multi-year battery life in always-on IoT endpoints) |
| Dropout Voltage | 750 mV typical at 80 mA (allows operation from single-cell Li-ion or alkaline down to ~3.45 V) |
| Operating Temp Range | −40 °C to +85 °C (validated for industrial-grade portable equipment) |
| Thermal Protection | Internal shutdown at ~160 °C (prevents damage during transient overload or poor PCB thermal design) |
| Package | SC82-AB (SC70-4), 1.9 mm × 1.3 mm × 0.95 mm (enables high-density layout in wearables and compact modules) |
Pinout & Package
SC82-AB (SC70-4) is a 4-pin, Pb-free, surface-mount package with 0.65 mm pitch and exposed pad not electrically connected. Dimensions: 1.9 mm × 1.3 mm × 0.95 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power supply ground reference; must be low-impedance connection to minimize noise and ensure regulation stability |
| 2 | Vin | Positive input supply (max 12 V); requires local 1.0 µF ceramic decoupling placed adjacent to pin |
| 3 | Vout | Regulated 2.7 V output; capable of stable operation with zero output capacitance or optional 0.1–10 µF ceramic/tantalum |
| 4 | N/C | No internal connection; left unconnected per datasheet; not used for thermal relief or grounding |
Key Features
| Feature | Design Value |
|---|---|
| NOCAPE architecture | Eliminates mandatory output capacitor - reduces BOM count, board area, and cost while maintaining stability |
| Ultra-low IQ | 2.8 µA typical enables >10-year battery life in 10 µA average-current applications (e.g., BLE sensor nodes) |
| Enable control | Active-high EN function (pin 3 is Vout; pin 4 is N/C - enable tied to Vin internally if unused) allows system-level power sequencing |
| ±2.0% output accuracy | Guaranteed over full temperature and load range - ensures reliable operation of 2.7 V ADC references and I/O interfaces |
| Thermal shutdown | Auto-recovery protection triggers at ~160 °C junction temperature - prevents permanent failure during sustained overload |
Applications
| Wearable Health Monitors | IoT Edge Sensor Nodes |
|---|---|
Use Scenario: Continuous ECG/PPG sensing with Bluetooth LE transmission in wrist-worn devices. IC Role / Device Role / Timing Role: Primary 2.7 V supply for ultra-low-power MCU, analog front-end, and BLE radio. Use Value: 2.8 µA quiescent current extends coin-cell lifetime beyond 2 years; NOCAP operation avoids capacitor aging drift in long-life medical designs. |
Use Scenario: Battery-powered environmental sensor (temp/humidity/pressure) reporting via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Standby power regulator enabling sub-µA deep-sleep current between measurement cycles. Use Value: 750 mV dropout allows operation down to 3.45 V input - maximizing usable capacity from single AA/AAA cells. |
| Portable Diagnostic Instruments | Low-Power Audio Accessories |
Use Scenario: Handheld point-of-care blood glucose or pulse oximetry units with LCD display and optical sensors. IC Role / Device Role / Timing Role: Precision 2.7 V rail for analog signal chain and display driver ICs. Use Value: ±2.0% output accuracy and 90 µVRMS noise ensure <1 LSB error in 12-bit ADC measurements under varying battery conditions. |
Use Scenario: USB-C powered earbud charging case with integrated battery management and audio codec. IC Role / Device Role / Timing Role: Clean 2.7 V bias for MEMS microphone preamp and DAC reference. Use Value: SC82-AB footprint fits tight space behind battery; no-output-capacitor design avoids ESR-related audio pop/click during power-up. |
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 | 2.7 V fixed, 2.5 µA IQ, SOT-23-3 package (3-pin, no enable), 600 mV dropout @ 250 mA | Lacks enable pin and N/C terminal; requires output capacitor (1 µF min); smaller thermal mass limits continuous 80 mA at elevated ambient | Prefer when board space is tighter than 1.3 mm width allows and enable control is unnecessary |
| TN02702D | 2.7 V fixed, 3.5 µA IQ, SC70-4 package, 850 mV dropout @ 80 mA, −40 °C to +105 °C rating | Slightly higher dropout and IQ; wider temp range but no automotive qualification; same pinout (GND/Vin/Vout/N/C) | Consider for extended-temp industrial use where AEC-Q100 is not required and 50 mV higher dropout is acceptable |
Compared with NCP553SQ27T1G, MCP1700T-2702E/TT offers lower quiescent current but sacrifices enable control and NOCAP operation, while TN02702D matches the SC70-4 footprint and pinout but trades 0.5 µA higher IQ and 100 mV higher dropout for broader temperature capability - neither is pin-compatible drop-in replacement due to differing enable implementation and capacitor requirements.
Availability
NCP553SQ27T1G is available at Aetrix Electronics and suitable for wearable health monitors, IoT edge sensor nodes, and portable diagnostic instruments requiring stable component supply despite its discontinued status - we maintain legacy inventory and support last-time-buy programs.
Supply support for NCP553SQ27T1G 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 NCP553 series was designed specifically for ultra-low-power, capacitor-free voltage regulation in handheld and battery-operated devices - emphasizing minimal quiescent current, small footprint, and robust thermal behavior in space-constrained portable electronics.
FAQ
Is NCP553SQ27T1G still in production?
No - NCP553SQ27T1G was officially marked as discontinued by onsemi in November 2025 (Rev. 7 datasheet). However, Aetrix Electronics holds active legacy stock and supports last-time-buy orders with full traceability and documentation for ongoing production programs.
Can NCP553SQ27T1G operate without an output capacitor?
Yes - NCP553SQ27T1G is a NOCAP regulator and functions stably with zero output capacitance. This is confirmed in the datasheet's Applications Information section and Typical Application Diagram. An output capacitor is optional and only needed for enhanced load transient response or noise filtering.
What is the maximum input voltage for NCP553SQ27T1G?
The absolute maximum input voltage for NCP553SQ27T1G is 12 V, as specified in the Maximum Ratings table. Operation above this level risks permanent device damage. For reliable 2.7 V output at 80 mA, input should remain ≥3.45 V (2.7 V + 750 mV dropout) and ≤12 V.
Does NCP553SQ27T1G have an enable pin?
No - NCP553SQ27T1G has no dedicated enable pin. Pin 4 is N/C (no internal connection). The device is always enabled when powered; external enable functionality requires adding a series PMOS switch on the input rail or using a variant like NCP553SQ27T1G's sibling with EN (e.g., NCP553MUTBG).
What is the thermal resistance (RJA) of NCP553SQ27T1G in SC82-AB package?
The datasheet specifies RJA = 400 °C/W for the SC82-AB package under standard JEDEC test conditions. At 25 °C ambient, this limits continuous power dissipation to ~250 mW before reaching the 125 °C max junction temperature - corresponding to ~80 mA at 3.1 V input (Vin − Vout = 0.4 V).
NCP553SQ27T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NOCAP™
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 1.2V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 6 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCP553SQ27T1G FAQ
1.How can I place an order for NCP553SQ27T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP553SQ27T1G 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 NCP553SQ27T1G reliable?
The price and inventory of NCP553SQ27T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP553SQ27T1G is usually 5 days.
3.What payment methods are accepted for NCP553SQ27T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP553SQ27T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP553SQ27T1G?
NCP553SQ27T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP553SQ27T1G 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 NCP553SQ27T1G?
For technical support, including NCP553SQ27T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP553SQ27T1G requirements.
6.How does Aetrix verify that NCP553SQ27T1G is sourced from the original manufacturer or authorized distributors?
All NCP553SQ27T1G 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 NCP553SQ27T1G meets industry standards.
7.What is the process for return or replacement of NCP553SQ27T1G?
All NCP553SQ27T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP553SQ27T1G, 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 NCP553SQ27T1G part is unused and in its original packaging.
Return procedure for NCP553SQ27T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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