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onsemi NCP512SQ25T1G
- Part No.:
- NCP512SQ25T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ25T1G.pdf
- Description:
- IC REG LINEAR 2.5V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:1,949
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Product details
Overview
NCP512SQ25T1G from onsemi is a fixed-output CMOS low-quiescent-current linear voltage regulator delivering 2.5 V at up to 80 mA, featuring 40 µA typical quiescent current, 220 mV dropout at 80 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable instrumentation requiring stable low-power bias.
For engineers reviewing the NCP512SQ25T1G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ operation, SC-88A (SOT-353) package compatibility, enable-controlled standby mode, and ceramic-capacitor stability without ESR constraints.
Technical Context
The NCP512SQ25T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection in a single die. Its enable input provides logic-level control of output regulation, with threshold voltages of 1.3 V (turn-on) and 0.3 V (turn-off).
It operates across −40 °C to +85 °C ambient, supports input voltages from 0 V to 6.0 V, and maintains regulation down to a 220 mV input–output differential at full 80 mA load - enabling use with single-cell Li-ion or multi-cell alkaline supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.0% - tightly regulated supply for MCU core or sensor analog front-end requiring stable reference. |
| Quiescent Current | 40 µA typical - enables >1-year battery life in always-on IoT sensors drawing <10 µA average system current. |
| Dropout Voltage | 220 mV at 80 mA - allows operation from 2.72 V input while sustaining full rated output, critical for aging battery systems. |
| Load Regulation | 0.3–0.8 mV/mA - ensures ≤64 mV output shift across 0–80 mA load, supporting dynamic digital loads without external compensation. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial handhelds and automotive cabin electronics without derating. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 180 µVRMS (100 Hz–100 kHz) - suitable for low-noise analog signal chains including ADC references and op-amp biasing. |
Pinout & Package
Package: SC-88A (SOT-353), 5-pin surface-mount, 2.0 mm × 2.1 mm footprint, Pb-free, micro-miniature profile optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Vin | Positive power supply input | Accepts 0–6.0 V unregulated input; requires local 1.0 µF ceramic decoupling per layout guidelines. |
| 2 GND | Power ground reference | Low-impedance return path for both input and output currents; must connect directly to solid ground plane. |
| 3 Enable | Logic-controlled regulator enable | Pull high ≥1.3 V to activate output; pull low ≤0.3 V to disable (40 nA standby current); tie to Vin if unused. |
| 4 N/C | No internal connection | Unbonded pad - electrically isolated; no routing or soldering required; avoid floating metal under pad. |
| 5 Vout | Regulated output voltage | Delivers 2.5 V ±2.0% at up to 80 mA; requires 1.0 µF ceramic output capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends battery runtime in always-on monitoring nodes without sacrificing regulation accuracy. |
| Low-dropout PMOS architecture | 220 mV dropout at 80 mA - enables efficient regulation from partially discharged batteries down to 2.72 V. |
| Ceramic-capacitor compatible | Stable with 1.0 µF output capacitance and ESR from near-zero to 5 Ω - eliminates need for costly tantalum or polymer caps. |
| Enable-controlled shutdown | Logic-compatible input with 1.3 V turn-on / 0.3 V turn-off thresholds - simplifies integration with GPIOs of low-voltage MCUs. |
| Integrated protection | Thermal shutdown (160 °C typical) and current limiting (150–400 mA depending on Vin) - prevents damage during fault conditions without external circuitry. |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using electrochemical sensing with low-power MCU and BLE radio. IC Role / Device Role / Timing Role: Primary 2.5 V bias rail for analog front-end and RF transceiver, enabled only during measurement bursts. Use Value: 40 µA quiescent current minimizes baseline drain; 220 mV dropout sustains operation as coin-cell voltage drops from 3.0 V to 2.72 V. |
Use Scenario: Multi-sensor wristband measuring heart rate, motion, and skin temperature with 7-day battery life target. IC Role / Device Role / Timing Role: Dedicated 2.5 V supply for optical sensor array and ADC, sequenced via MCU GPIO on NCP512SQ25T1G Enable pin. Use Value: Ceramic-capacitor stability eliminates ESR tuning; ±2.0% output tolerance ensures consistent photodiode bias across temperature. |
| Industrial Handheld Scanners | Smart Home Sensor Nodes |
|
Use Scenario: Rugged barcode scanner powered by replaceable AA batteries, operating in −20 °C to +60 °C environments. IC Role / Device Role / Timing Role: Main 2.5 V rail for image sensor, laser driver, and decode processor, with thermal shutdown protecting against enclosure heat buildup. Use Value: −40 °C to +85 °C rating ensures functionality at cold storage temperatures; 50 dB ripple rejection cleans DC/DC switching noise. |
Use Scenario: Zigbee-enabled door/window contact sensor using CR2032 coin cell with 2-year shelf life requirement. IC Role / Device Role / Timing Role: Always-on 2.5 V supply for magnetic reed switch interface and ultra-low-power SoC, disabled during deep sleep via Enable pin. Use Value: 40 µA IQ enables sub-µA system sleep current; SC-88A package fits within 3.2 mm × 3.2 mm board area budget. |
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/MB | 3.0 µA IQ (lower), 250 mV dropout at 250 mA, SOT-23-3 package (no enable) | Lacks enable control and has higher dropout at 80 mA (250 mV vs. 220 mV); requires different PCB layout. | Choose when minimum IQ dominates over enable flexibility and board space is constrained for 3-pin layout. |
| Torex XC6206P252MR-G | 1.0 µA IQ, 160 mV dropout at 100 mA, SOT-25 package, no thermal shutdown | Higher max output current but lacks integrated thermal protection; tighter 1.0% initial accuracy. | Prefer when ultra-deep sleep current is critical and thermal risk is mitigated externally. |
Compared with MCP1700T-2502E/MB and XC6206P252MR-G, the NCP512SQ25T1G offers balanced ultra-low IQ (40 µA), enable functionality, thermal protection, and SC-88A footprint - making it optimal for space-limited, battery-powered systems needing controlled power sequencing and robust fault handling.
Availability
NCP512SQ25T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, and industrial handheld scanners requiring stable component supply with long-term manufacturability assurance.
Supply support for NCP512SQ25T1G 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and edge applications - focused on sustainable innovation and functional safety.
The NCP512SQ25T1G belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated portable electronics where extended runtime, small footprint, and reliable low-noise regulation are essential design requirements.
FAQ
What is the maximum input voltage for the NCP512SQ25T1G?
The NCP512SQ25T1G supports an absolute maximum input voltage of 6.0 V, as specified in its Maximum Ratings table. Operation above this level risks permanent device damage. For reliable 2.5 V output regulation, the recommended minimum input is 2.72 V (2.5 V + 220 mV dropout), and typical designs use 3.3 V or 4.2 V inputs from Li-ion or regulated sources.
Does the NCP512SQ25T1G require an external capacitor on the Enable pin?
No, the NCP512SQ25T1G does not require an external capacitor on the Enable pin. The Enable input is CMOS-compatible with high impedance (>10 MΩ), and the datasheet specifies direct connection to MCU GPIO or Vin (if unused). Adding capacitance may slow enable/disable transitions and is unnecessary for noise immunity in standard layouts.
Can the NCP512SQ25T1G be used with a 0.47 µF output capacitor?
No - the NCP512SQ25T1G requires a minimum 1.0 µF ceramic output capacitor for guaranteed stability, as confirmed in the Applications Information section. Using 0.47 µF violates the stability condition and may cause oscillation or poor transient response, especially under load steps. TDK part numbers C2012X5R1C105K or C1608X5R1A105K are validated alternatives.
What is the thermal shutdown trigger temperature for the NCP512SQ25T1G?
The NCP512SQ25T1G activates thermal shutdown at approximately 160 °C junction temperature, as defined in the Definitions section of the datasheet. Once triggered, the device disables output until junction temperature falls below the hysteresis threshold (~140 °C), protecting against sustained overtemperature events during overload or poor PCB thermal design.
Is the NCP512SQ25T1G pin-compatible with other NCP512 variants like NCP512SQ33T1G?
Yes - all NCP512 variants including NCP512SQ25T1G and NCP512SQ33T1G share identical SC-88A (SOT-353) pinout and package dimensions. Pin 1 is Vin, Pin 2 is GND, Pin 3 is Enable, Pin 4 is N/C, and Pin 5 is Vout across the entire series, enabling drop-in replacement when output voltage and marking code are verified.
NCP512SQ25T1G 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):
- 0.3V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 90 µA
- PSRR:
- 50dB (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)
NCP512SQ25T1G FAQ
1.How can I place an order for NCP512SQ25T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ25T1G 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 NCP512SQ25T1G reliable?
The price and inventory of NCP512SQ25T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ25T1G is usually 5 days.
3.What payment methods are accepted for NCP512SQ25T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ25T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ25T1G?
NCP512SQ25T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ25T1G 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 NCP512SQ25T1G?
For technical support, including NCP512SQ25T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ25T1G requirements.
6.How does Aetrix verify that NCP512SQ25T1G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ25T1G 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 NCP512SQ25T1G meets industry standards.
7.What is the process for return or replacement of NCP512SQ25T1G?
All NCP512SQ25T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ25T1G, 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 NCP512SQ25T1G part is unused and in its original packaging.
Return procedure for NCP512SQ25T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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