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onsemi NCP553SQ27T1
- Part No.:
- NCP553SQ27T1
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP553SQ27T1.pdf
- Description:
- IC REG LINEAR 2.7V 80MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,426
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Product details
Overview
NCP553SQ27T1 from onsemi is a fixed 2.7 V, 80 mA CMOS low-IQ NOCAP linear voltage regulator in SC82-AB (SC70-4) package, featuring 2.8 µA typical quiescent current, ±2.0% output voltage accuracy over −40°C to +85°C, and zero-output-capacitor operation capability-designed for battery-powered handheld instruments and portable consumer electronics.
For engineers reviewing the NCP553SQ27T1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal behavior, no-capacitor stability validation, SC70-4 footprint compatibility, and direct substitution guidance against functionally aligned LDOs with matching 2.7 V output and ultra-low IQ.
Technical Context
The NCP553SQ27T1 employs a PMOS pass transistor architecture enabling dropout voltage as low as 750 mV at 80 mA across temperature, with internal thermal shutdown (trip ~160°C) and current limiting (~100 mA for 2.7 V version). It operates without mandatory output capacitance due to inherent stability with ceramic or tantalum decoupling down to 0.1 µF.
No enable functionality is integrated-Pin 4 is N/C-distinguishing it from the NCP552 variant. Its ground current remains stable across load (1–80 mA) and input voltage (3.7–12 V), supporting predictable power budgeting in energy-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7 V ±2.0% (ensures stable rail for 2.7 V logic or analog circuitry) |
| Quiescent Current | 2.8 µA typical (enables >1-year battery life in 10 µA standby systems) |
| Max Output Current | 80 mA (supports microcontrollers, sensors, and RF front-ends with burst loads) |
| Dropout Voltage | 750 mV @ 80 mA, −40°C to +85°C (allows operation from single Li-ion cell down to 3.45 V) |
| Operating Temp Range | −40°C to +85°C (validates use in industrial portable equipment) |
| Input Voltage Range | Up to 12 V (supports wide-input battery or adapter-fed designs) |
| Output Noise | 90 µVRMS (20 Hz–100 kHz) (suitable for noise-sensitive ADC references or audio bias rails) |
Pinout & Package
Package: SC82-AB (SC70-4), 1.8 × 1.15 × 0.8 mm, surface-mount, Pb-free compatible.
| 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; accepts up to 12 V; requires local 1 µF ceramic decoupling |
| 3 | Vout | Regulated 2.7 V output; stable without output capacitor; supports 0.1–10 µF ceramic/tantalum |
| 4 | N/C | No internal connection; left floating or grounded-no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| NOCAP operation | Stable regulation with zero output capacitor-reduces BOM count and PCB area in space-constrained devices |
| Ultra-low IQ | 2.8 µA typical enables multi-year operation from coin cells or primary batteries in always-on monitoring nodes |
| PMOS pass element | Enables low dropout and eliminates reverse-current path-no body diode conduction during input collapse |
| ±2.0% output accuracy | Guaranteed over full temperature and load range-eliminates need for post-regulation trimming in cost-sensitive designs |
| Thermal shutdown | Activates at ~160°C junction temperature-protects device during sustained overload or poor heatsinking |
Applications
| Handheld Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) sensor node powered by CR2032 coin cell, operating 24/7 with periodic BLE transmission. IC Role / Device Role / Timing Role: Primary 2.7 V power rail regulator for analog front-end and ultra-low-power MCU. Use Value: 2.8 µA IQ extends battery life beyond 18 months; NOCAP operation removes output cap, saving 0.6 mm² PCB area in 3.2 × 3.2 mm module. | Use Scenario: Optical heart-rate sensor subsystem in wrist-worn device, requiring clean 2.7 V for photodiode amplifier and ADC. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for precision analog signal chain. Use Value: 90 µVRMS noise and ±2.0% accuracy ensure <0.5% gain error in optical measurement path without calibration. |
| Industrial Handheld Scanners | Smart Remote Controls |
Use Scenario: Rugged barcode scanner using alkaline AA batteries, subjected to −20°C field operation and frequent motor-triggered load surges. IC Role / Device Role / Timing Role: Main system regulator supplying 2.7 V to laser driver, decoder IC, and display backlight controller. Use Value: 750 mV dropout at 80 mA allows reliable operation down to 3.45 V input-extending usable battery voltage range by 0.3 V vs. standard LDOs. | Use Scenario: IR/RF hybrid remote with motion wake-up, requiring sub-µA sleep current and fast 2.7 V rail availability on button press. IC Role / Device Role / Timing Role: Always-on regulator powering real-time clock and accelerometer interrupt logic. Use Value: Stable 2.7 V output with no external capacitor ensures immediate rail availability (<1 µs turn-on delay) and eliminates capacitor aging drift over 10-year product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output, ultra-low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2702E/TT | 2.7 V, 250 mA, 1.6 µA IQ, SOT-23-3; no enable; requires min. 1 µF output cap | Higher current capacity but mandates output capacitor-unsuitable where NOCAP is critical | Select only if >80 mA load or tighter IQ (<1.6 µA) is required and board space allows added capacitor |
| Torex XC6206P272MR-G | 2.7 V, 150 mA, 1 µA IQ, SOT-23-3; no enable; requires min. 1 µF output cap | Lower IQ and higher current, but lacks NOCAP capability and uses different package footprint | Choose when maximum battery life is paramount and output capacitance is acceptable; verify SOT-23-3 layout compatibility |
Compared with MCP1700T-2702E/TT and XC6206P272MR-G, the NCP553SQ27T1 uniquely supports true capacitorless operation while delivering sufficient 80 mA current and industry-standard ±2.0% accuracy-making it the only option when minimizing component count and PCB area is non-negotiable.
Availability
NCP553SQ27T1 is available at Aetrix Electronics and suitable for handheld medical sensors, wearable fitness trackers, industrial handheld scanners, smart remote controls, and portable instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for NCP553SQ27T1 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP553 series belongs to onsemi's ultra-low-quiescent-current NOCAP LDO family, engineered specifically for battery-powered portable electronics where minimal standby current, small footprint, and capacitor-free simplicity are essential design constraints.
FAQ
Does NCP553SQ27T1 require an output capacitor to operate stably?
Yes, the NCP553SQ27T1 is explicitly designed for NOCAP operation-it functions stably with zero output capacitance. This is validated across all conditions in the official datasheet (Figure 2, Applications Information section). While adding a 0.1–10 µF ceramic capacitor improves load transient response and noise rejection, it is not required for basic regulation stability. The NCP553SQ27T1 achieves this via internal compensation optimized for PMOS pass transistor dynamics.
What is the maximum input voltage rating for NCP553SQ27T1?
The absolute maximum input voltage for NCP553SQ27T1 is 12 V, as specified in the Maximum Ratings table of the datasheet. Operation above this level risks permanent damage. For reliable long-term performance, the recommended operating input range is 3.7 V to 12 V-ensuring ≥1.0 V headroom above the 2.7 V output for proper regulation, especially under 80 mA load where dropout reaches 750 mV.
Is NCP553SQ27T1 pin-compatible with NCP552SQ27T1?
No, NCP553SQ27T1 is not pin-compatible with NCP552SQ27T1. While both share the SC82-AB (SC70-4) package and identical Pin 1 (GND), Pin 4 differs: NCP552SQ27T1 uses Pin 4 as Enable, whereas NCP553SQ27T1 designates Pin 4 as N/C (no internal connection). Swapping them without board revision will disable enable control in NCP552 designs or leave an unused pin in NCP553 layouts-requiring separate PCB footprints.
What is the thermal shutdown threshold for NCP553SQ27T1?
The NCP553SQ27T1 incorporates internal thermal protection that activates at approximately 160°C junction temperature, as stated in the Definitions section of the datasheet. Once triggered, the device shuts down output until junction temperature falls below the hysteresis threshold (~140°C). This safeguard prevents catastrophic failure during sustained overload, poor PCB thermal relief, or ambient temperature excursions-ensuring robustness in handheld and portable deployments where airflow is limited.
Can NCP553SQ27T1 be used in automotive applications?
The standard NCP553SQ27T1 is rated for −40°C to +85°C ambient and is not qualified for automotive use. For automotive-grade operation up to +125°C, the NCV553SQ27T1 variant must be selected-it carries the "NCV" prefix, undergoes additional AEC-Q100 stress testing, and features extended temperature qualification. Using NCP553SQ27T1 in under-hood or dashboard environments exceeding +85°C risks parametric drift and premature failure; always verify part number suffix and temperature grade before automotive deployment.
NCP553SQ27T1 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):
- 2.7V
- 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
NCP553SQ27T1 FAQ
1.How can I place an order for NCP553SQ27T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP553SQ27T1 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 NCP553SQ27T1 reliable?
The price and inventory of NCP553SQ27T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP553SQ27T1 is usually 5 days.
3.What payment methods are accepted for NCP553SQ27T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP553SQ27T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP553SQ27T1?
NCP553SQ27T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP553SQ27T1 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 NCP553SQ27T1?
For technical support, including NCP553SQ27T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP553SQ27T1 requirements.
6.How does Aetrix verify that NCP553SQ27T1 is sourced from the original manufacturer or authorized distributors?
All NCP553SQ27T1 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 NCP553SQ27T1 meets industry standards.
7.What is the process for return or replacement of NCP553SQ27T1?
All NCP553SQ27T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP553SQ27T1, 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 NCP553SQ27T1 part is unused and in its original packaging.
Return procedure for NCP553SQ27T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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