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onsemi NCP553SQ25T1G
- Part No.:
- NCP553SQ25T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP553SQ25T1G.pdf
- Description:
- IC REG LINEAR 2.5V 80MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,929
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Product details
Overview
NCP553SQ25T1G from onsemi is a fixed-output, NOCAP low-dropout linear regulator delivering 2.5 V at up to 80 mA with ultra-low 2.8 µA quiescent current, housed in SC82-AB (SC70-4) package. It operates without an output capacitor, supports input voltages up to 12 V, and maintains ±2.0% output accuracy across −40 °C to +85 °C - ideal for battery-powered portable instrumentation requiring minimal standby power.
For engineers reviewing the NCP553SQ25T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 80 mA (750 mV typ.), thermal shutdown at 160 °C, no-capacitor stability, and Pb-free SC82-AB packaging compatible with space-constrained handheld designs.
Technical Context
The NCP553SQ25T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and protection circuitry (current limit and thermal shutdown). Its NOCAP architecture eliminates mandatory output capacitance, relying instead on internal compensation for stability with ceramic or tantalum input capacitors as low as 0.1 µF.
It features an enable pin (pin 3 per marking diagram) that places the device into low-power standby when pulled low; unused, it must be tied to Vin. Dropout voltage is specified at Vout −3.0% under load, with line regulation of 2.0–4.5 mV/V and load regulation of 0.3–0.8 mV/mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.0% over −40 °C to +85 °C - ensures stable rail for low-voltage microcontrollers and sensors. |
| Quiescent Current | 2.8 µA typical at Iout = 1 mA - enables multi-year battery life in always-on IoT endpoints. |
| Max Output Current | 80 mA continuous - sufficient for powering RF transceivers, ADCs, or small logic subsystems. |
| Dropout Voltage | 750 mV typical at 80 mA - allows operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min). |
| Input Voltage Range | Up to 12 V - supports wide-input industrial or automotive accessory rails with margin. |
| Thermal Shutdown | Activates at ~160 °C - protects against PCB-level overheating during sustained high-load or poor heatsinking conditions. |
| No-Capacitor Operation | Validated stable without output capacitor - reduces BOM count and board area in ultra-compact wearables. |
Pinout & Package
Package: SC82-AB (SC70-4), Pb-free, 1.8 × 1.15 mm footprint, 0.4 mm max height - optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power supply ground reference; must be low-impedance connection to minimize noise coupling. |
| 2 | Vin | Positive input supply; requires local 1.0 µF decoupling capacitor placed adjacent to pin. |
| 3 | Vout | Regulated 2.5 V output; stable without external capacitor but benefits from 0.1–10 µF ceramic for transient response. |
| 4 | N/C | No internal connection - left unconnected; not usable as thermal pad or auxiliary terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2.8 µA typical enables >10-year battery life in coin-cell–powered remote sensors. |
| NOCAPE architecture | Eliminates mandatory output capacitor - cuts BOM cost and saves 0.5–1.0 mm² PCB area per regulator. |
| ±2.0% output accuracy | Meets tight tolerance requirements for analog front-ends and reference-sensitive ADCs. |
| Industrial temperature range | −40 °C to +85 °C operation validated - suitable for outdoor consumer electronics and industrial handhelds. |
| Pb-free SC82-AB package | RoHS-compliant, reflow-compatible surface-mount package with 0.65 mm pitch - supports automated assembly. |
Applications
| Portable Medical Sensors | Wireless Remote Controls |
|---|---|
Use Scenario: Continuous glucose monitor using coin-cell battery and low-power BLE SoC. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying sensor bias and MCU core voltage. Use Value: 2.8 µA quiescent current extends battery life beyond 3 years; NOCAP design avoids capacitor aging drift affecting calibration stability. |
Use Scenario: Infrared remote with motion-activated wake-up and sub-100 µA sleep current. IC Role / Device Role / Timing Role: Always-on 2.5 V rail for IR receiver and wake-up logic. Use Value: Enables reliable cold-start from depleted batteries down to 2.7 V input; 750 mV dropout ensures regulation until battery reaches 2.25 V. |
| Handheld Test Meters | Smart Home Doorbell Cameras |
Use Scenario: Battery-powered multimeter with LCD display and auto-ranging ADC. IC Role / Device Role / Timing Role: Precision 2.5 V reference and analog supply for 16-bit SAR ADC. Use Value: ±2.0% output accuracy and <100 ppm/°C TC ensure measurement repeatability across operating temperature range. |
Use Scenario: Solar-charged doorbell camera with intermittent Wi-Fi upload and PIR-triggered recording. IC Role / Device Role / Timing Role: Standby power regulator for real-time clock and motion detection ASIC. Use Value: Thermal shutdown at 160 °C prevents failure during summer ambient exposure inside plastic enclosures. |
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-2502E/TT | 2.5 V, 250 mA, 1.6 µA IQ, SOT-23-3 - higher current but no enable pin; requires output capacitor. | Not suitable where NOCAP operation or enable control is required; better for higher-load sensor nodes. | Select if >80 mA output or lower IQ is critical, and board layout permits added capacitor. |
| TPS78025DRVR | 2.5 V, 150 mA, 500 nA IQ, WSON-6 - ultra-low IQ but larger package and mandatory 1 µF output cap. | Preferred for ultra-long-life applications where 500 nA IQ outweighs capacitor and footprint penalties. | Choose only when nanoscale IQ dominates design priority and space constraints allow WSON-6. |
Compared with MCP1700T-2502E/TT and TPS78025DRVR, the NCP553SQ25T1G uniquely combines NOCAP operation, integrated enable, and SC70-4 footprint - making it optimal for size- and capacitor-constrained 2.5 V rails where 80 mA suffices.
Availability
NCP553SQ25T1G is available at Aetrix Electronics and suitable for portable medical sensors, wireless remotes, handheld test meters, smart home cameras, and battery-powered instrumentation requiring stable component supply with long-lifecycle assurance.
Supply support for NCP553SQ25T1G 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 NCP553 series was designed specifically for ultra-low-power, capacitor-free linear regulation in space-constrained portable devices - emphasizing quiescent current minimization and thermal robustness without sacrificing accuracy.
FAQ
What is the maximum input voltage rating for the NCP553SQ25T1G?
The NCP553SQ25T1G 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, maintain Vin ≤ 12 V with appropriate derating for thermal conditions - especially when delivering 80 mA near ambient temperature limits.
Does the NCP553SQ25T1G require an output capacitor to function?
No, the NCP553SQ25T1G is explicitly designed for NOCAP operation and remains stable without any output capacitor. However, adding a 0.1–10 µF ceramic capacitor improves load transient response and noise rejection - particularly beneficial in systems with pulsed loads like RF transceivers or digital sensors.
What is the dropout voltage of the NCP553SQ25T1G at full load?
At 80 mA output current and −40 °C to +125 °C junction temperature, the NCP553SQ25T1G exhibits a typical dropout voltage of 750 mV and a maximum of 1200 mV (measured at Vout −3.0%). This allows regulation from inputs as low as 3.25 V while delivering 2.5 V, supporting single-cell Li-ion and two-cell alkaline sources.
Is the NCP553SQ25T1G pin-compatible with other variants in the NCP553 family?
Yes - all NCP553 variants (e.g., NCP553SQ28T1G, NCP553SQ33T1G) share identical SC82-AB (SC70-4) pinout and footprint. Only the output voltage and top-side marking differ; no PCB redesign is needed when swapping between fixed-voltage versions within the same temperature grade.
What does the "SQ" suffix indicate in NCP553SQ25T1G?
The "SQ" suffix denotes the SC82-AB (SC70-4) package variant per onsemi's ordering nomenclature. It confirms the device uses the micro-miniature 4-pin surface-mount package with GND–Vin–Vout–N/C pin configuration, Pb-free finish, and tape-and-reel packaging (3,000 units per reel).
NCP553SQ25T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- NOCAP™
- Package/Case:
- SC-82A, SOT-343
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 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
NCP553SQ25T1G FAQ
1.How can I place an order for NCP553SQ25T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP553SQ25T1G 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 NCP553SQ25T1G reliable?
The price and inventory of NCP553SQ25T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP553SQ25T1G is usually 5 days.
3.What payment methods are accepted for NCP553SQ25T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP553SQ25T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP553SQ25T1G?
NCP553SQ25T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP553SQ25T1G 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 NCP553SQ25T1G?
For technical support, including NCP553SQ25T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP553SQ25T1G requirements.
6.How does Aetrix verify that NCP553SQ25T1G is sourced from the original manufacturer or authorized distributors?
All NCP553SQ25T1G 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 NCP553SQ25T1G meets industry standards.
7.What is the process for return or replacement of NCP553SQ25T1G?
All NCP553SQ25T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP553SQ25T1G, 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 NCP553SQ25T1G part is unused and in its original packaging.
Return procedure for NCP553SQ25T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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