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onsemi NCP612SQ25T1G
- Part No.:
- NCP612SQ25T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP612SQ25T1G.pdf
- Description:
- IC REG LINEAR 2.5V 100MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
NCP612SQ25T1G from onsemi is a fixed-output CMOS low-dropout linear voltage regulator delivering 100 mA at 2.5 V with ultra-low 40 µA quiescent current and 270 mV dropout at full load, designed for battery-powered portable electronics requiring stable low-power biasing of microcontrollers, sensors, and RF front-ends.
For engineers reviewing the NCP612SQ25T1G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 2.5 V ±2% output accuracy across −40 °C to +85 °C, SC70-5 package compatibility with 1 µF ceramic input/output capacitors, and enable-controlled standby mode for system-level power sequencing.
Technical Context
The NCP612SQ25T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection in a single die. Its architecture enables stable regulation with no minimum load requirement and supports operation down to 0 V input-to-output differential during shutdown.
It features active enable control with logic-compatible threshold (0.95 V turn-on, 0.3 V turn-off), ground current tracking output load (40 µA quiescent, ≤90 µA under 100 mA load), and inherent immunity to ceramic capacitor ESR variations-eliminating need for external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2% over −40 °C to +85 °C - ensures reliable MCU core or sensor analog supply within tight tolerance without external trimming. |
| Dropout Voltage | 270 mV at 100 mA - enables regulation from 2.77 V input, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Quiescent Current | 40 µA typical - minimizes standby power loss, critical for always-on IoT nodes and wearable devices with multi-year battery targets. |
| Enable Threshold | 0.95 V (rising), 0.3 V (falling) - compatible with 1.8 V/3.3 V GPIOs and allows clean power gating without level-shifting circuitry. |
| Thermal Shutdown | Activates at ~160 °C - protects against sustained overload or poor PCB thermal design while permitting safe transient current bursts. |
| Input Voltage Range | 0 to 6.0 V - supports direct connection to unregulated battery rails including fully charged Li-ion (4.2 V) and dual-cell alkaline (3.2 V). |
| Output Noise | 100 µVRMS (100 Hz–100 kHz) - suitable for noise-sensitive analog circuits like ADC references and RF synthesizer VCO supplies. |
Pinout & Package
Housed in the SC70-5 (SOT-353) surface-mount package (2.2 mm × 2.2 mm × 0.9 mm), the NCP612SQ25T1G uses a standardized 5-pin layout optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Main input supply connection; accepts up to 6.0 V and must be decoupled with ≥1 µF ceramic capacitor placed adjacent to pin. |
| 2 | Gnd | Power ground reference; requires low-impedance PCB pour to minimize noise coupling and ensure regulation stability. |
| 3 | Enable | Active-high digital control input; pulling below 0.3 V disables output and reduces ground current to <1 µA for zero-load standby. |
| 4 | N/C | No internal connection; must remain unconnected or floating - not to be tied to Gnd/Vin or used as thermal pad. |
| 5 | Vout | Regulated 2.5 V output; requires ≥1 µF ceramic output capacitor; ESR from 0.5 mΩ to 5 Ω is supported without instability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 40 µA typical enables >10-year battery life in 10 µA average-current applications such as BLE beacons and environmental sensors. |
| Low-noise regulation | 100 µVRMS output noise avoids signal integrity degradation in precision analog signal chains and clock generation circuits. |
| Capacitor flexibility | Stable with 1 µF ceramic or tantalum capacitors - eliminates need for costly high-ESR electrolytics and simplifies BOM management. |
| Wide temperature range | Specified from −40 °C to +85 °C - qualified for industrial and consumer portable equipment operating in uncontrolled ambient environments. |
| Integrated protection | Thermal shutdown and current limiting prevent damage during short-circuit or overtemperature events without external components. |
Applications
| Wearable Health Monitor | IoT Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing powered by coin cell or small Li-poly battery. IC Role / Device Role / Timing Role: Supplies clean 2.5 V bias to analog front-end (AFE) and low-power MCU core. Use Value: 40 µA quiescent current extends battery life beyond 2 years; 270 mV dropout maintains regulation until battery drops to 2.77 V. |
Use Scenario: Battery-operated environmental sensor transmitting data via LoRaWAN or NB-IoT. IC Role / Device Role / Timing Role: Powers RF transceiver IC and precision temperature/humidity sensor. Use Value: 100 µVRMS noise prevents RF desensitization; enable pin synchronizes power with transmission duty cycle. |
| Portable Medical Diagnostic Tool | Handheld Barcode Scanner |
|
Use Scenario: Pocket-sized pulse oximeter with OLED display and optical sensor array. IC Role / Device Role / Timing Role: Provides stable 2.5 V rail for optical detector amplifiers and ADC reference. Use Value: ±2% output accuracy ensures consistent analog measurement calibration across temperature; SC70-5 footprint saves board space. |
Use Scenario: Ruggedized handheld scanner using laser diode and CMOS imager. IC Role / Device Role / Timing Role: Regulates power to imager sensor and laser driver logic interface. Use Value: No minimum load requirement allows full shutdown between scans; 6 V max input accommodates USB-powered operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/MB | 250 mA output, 1.6 µA quiescent, SOT-23-3 package (no enable) | Lacks enable control and has higher dropout (600 mV @ 250 mA) | Choose when higher output current is required and enable functionality is unnecessary. |
| TNIV25025X | 200 mA output, 2.5 µA quiescent, DFN-6 package with thermal pad | Requires PCB thermal relief; no N/C pin - different pinout and layout | Prefer when ultra-low IQ dominates and thermal performance justifies re-layout. |
Compared with MCP1700T-2502E/MB and TNIV25025X, the NCP612SQ25T1G uniquely balances ultra-low quiescent current (40 µA), integrated enable, SC70-5 compactness, and 100 mA capability - making it optimal for space-constrained, battery-gated portable systems where standby efficiency and pin count matter.
Availability
NCP612SQ25T1G is available at Aetrix Electronics and suitable for wearable health monitors, IoT sensor nodes, and portable medical diagnostic tools requiring stable component supply with long-lifecycle support.
Supply support for NCP612SQ25T1G 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 is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and intelligent edge applications.
The NCP612SQ25T1G belongs to onsemi's NCP612 series of ultra-low-IQ LDOs, engineered specifically for extended battery life in handheld communication and portable instrumentation.
FAQ
What is the maximum input voltage rating for the NCP612SQ25T1G?
The NCP612SQ25T1G supports an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable 2.5 V output, minimum recommended input is 2.77 V (2.5 V + 270 mV dropout), enabling use with single-cell Li-ion (up to 4.2 V) and two-cell alkaline (up to 3.2 V) sources. The NCP612SQ25T1G includes internal protection against transient overvoltage conditions within its rated range.
Does the NCP612SQ25T1G require an external pull-up resistor on the Enable pin?
No, the NCP612SQ25T1G does not require an external pull-up on the Enable pin. When unused, the Enable pin must be connected directly to Vin to ensure continuous operation. The device's internal structure allows direct Vin tie-off without risk of excessive current draw or logic conflict. Adding an external pull-up may interfere with controlled shutdown sequences and is not recommended per the datasheet guidance for NCP612SQ25T1G.
Can the NCP612SQ25T1G operate with only a 1 µF ceramic output capacitor?
Yes, the NCP612SQ25T1G is explicitly designed and tested to remain stable with a 1 µF ceramic output capacitor - no minimum ESR requirement applies. This is confirmed in the Applications Information section of the datasheet, which states the regulator "does not require any specific Equivalent Series Resistance" and accepts ceramics from a few mΩ up to 5.0 Ω. Using 1 µF X5R/X7R ceramics (e.g., TDK C1608X5R1A105K) meets all stability criteria for NCP612SQ25T1G.
What is the output voltage accuracy specification for the NCP612SQ25T1G over temperature?
The NCP612SQ25T1G guarantees output voltage accuracy of ±2.0% over the full operating ambient temperature range of −40 °C to +85 °C at 10 mA load. At 100 mA load, the same ±2.0% tolerance holds, with measured values spanning 2.440 V to 2.560 V. This accuracy is maintained without external trimming or feedback resistors, as the 2.5 V reference is laser-trimmed during manufacturing and validated across temperature sweeps per the Electrical Characteristics table.
Is the NCP612SQ25T1G pin-compatible with other variants in the NCP612 family?
Yes, all NCP612 variants-including NCP612SQ15T1G, NCP612SQ18T1G, NCP612SQ25T1G, NCP612SQ30T1G, and NCP612SQ33T1G-share identical SC70-5 package dimensions and pinout (Vin, Gnd, Enable, N/C, Vout). This allows drop-in replacement across output voltages without PCB redesign. However, note that NCP612SQ25T1G is marked "LHQ" per the ordering table, and marking codes differ per voltage option - but physical and electrical pin mapping remains consistent.
NCP612SQ25T1G 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):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- -
- 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)
NCP612SQ25T1G FAQ
1.How can I place an order for NCP612SQ25T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP612SQ25T1G 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 NCP612SQ25T1G reliable?
The price and inventory of NCP612SQ25T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP612SQ25T1G is usually 5 days.
3.What payment methods are accepted for NCP612SQ25T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP612SQ25T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP612SQ25T1G?
NCP612SQ25T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP612SQ25T1G 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 NCP612SQ25T1G?
For technical support, including NCP612SQ25T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP612SQ25T1G requirements.
6.How does Aetrix verify that NCP612SQ25T1G is sourced from the original manufacturer or authorized distributors?
All NCP612SQ25T1G 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 NCP612SQ25T1G meets industry standards.
7.What is the process for return or replacement of NCP612SQ25T1G?
All NCP612SQ25T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP612SQ25T1G, 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 NCP612SQ25T1G part is unused and in its original packaging.
Return procedure for NCP612SQ25T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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