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onsemi NCP512SQ18T2G
- Part No.:
- NCP512SQ18T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ18T2G.pdf
- Description:
- IC REG LINEAR 1.8V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:396
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Product details
Overview
NCP512SQ18T2G from onsemi is a fixed-output CMOS low-quiescent-current linear voltage regulator delivering 1.8 V at up to 80 mA, featuring 40 µA typical quiescent current, 180 mV dropout at 80 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring stable low-power rail generation.
For engineers reviewing the NCP512SQ18T2G 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 across −40 °C to +85 °C ambient conditions.
Technical Context
The NCP512SQ18T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/current-limit protection in a single die. Its enable input provides logic-level control of output regulation, with threshold voltages specified at 0.3 V (logic low) and 1.3 V (logic high).
Designed for low-noise, low-ESR ceramic output capacitors (≥1.0 µF), it achieves 50 dB ripple rejection at 1 kHz and 180 µVRMS output noise (100 Hz–100 kHz). Dropout behavior is characterized across temperature (−40 °C to +85 °C) and load (1–80 mA), with worst-case dropout of 240 mV at 80 mA for the 1.8 V variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% - tightly regulated rail for core logic or I/O supply in space-constrained portable systems |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on sensor or standby subsystems |
| Dropout Voltage | 180 mV at 80 mA - supports operation down to Vin = 1.98 V, critical for single-cell Li-ion or NiMH applications |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade portable equipment without derating |
| Enable Threshold | 0.3 V (disable) / 1.3 V (enable) - compatible with 1.8 V GPIO or open-drain logic control |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters |
| Output Noise | 180 µVRMS (100 Hz–100 kHz) - suitable for noise-sensitive analog or RF circuitry |
Pinout & Package
The NCP512SQ18T2G is housed in the SC-88A (SOT-353) surface-mount package - a 5-pin, 1.25 mm × 2.1 mm micro-miniature outline with 0.65 mm pitch, optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Input power supply connection | Accepts 1.98 V to 6.0 V unregulated input; requires local 1.0 µF decoupling capacitor |
| 2 (GND) | Power ground reference | Low-impedance return path for input/output currents; must be routed with minimal trace inductance |
| 3 (Enable) | Regulator enable control input | Active-high logic input; pull to Vin for always-on operation or drive externally for dynamic power gating |
| 4 (N/C) | No internal connection | Unbonded pin - must remain floating or grounded; no electrical function or thermal role |
| 5 (Vout) | Regulated output voltage node | Delivers stable 1.8 V to load; requires ≥1.0 µF ceramic output capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - reduces standby power loss by >90% vs. standard LDOs, extending battery runtime |
| Low-dropout PMOS architecture | 180 mV dropout at full 80 mA load - enables efficient regulation from near-dead battery cells |
| Ceramic-capacitor stability | Stable with 1.0 µF X5R/X7R ceramics - eliminates need for costly tantalum or aluminum electrolytics |
| Integrated protection | Thermal shutdown and current limiting - prevents damage during overload or PCB thermal stress |
| Pb-free SC-88A package | RoHS-compliant 5-pin SOT-353 - supports automated assembly and meets global environmental compliance |
Applications
| Smartphone Baseband Core Supply | Wireless Headset Audio Codec Rail |
|---|---|
Use Scenario: Powers baseband processor core logic in compact smartphone designs where battery voltage sags below 2.5 V during peak transmit bursts. IC Role / Device Role / Timing Role: Low-noise, enable-controlled 1.8 V LDO supplying digital core domain with fast transient response. Use Value: Maintains stable 1.8 V under 80 mA pulsed loads while consuming only 40 µA in idle - directly enabling longer talk time per charge cycle. |
Use Scenario: Supplies clean 1.8 V bias to stereo audio DAC/ADC in Bluetooth earbuds with tight board area constraints. IC Role / Device Role / Timing Role: Ultra-low-noise voltage regulator providing reference-stable rail for high-fidelity audio conversion. Use Value: 180 µVRMS noise and 50 dB ripple rejection prevent audible artifacts from RF interference or switching supply coupling. |
| Portable Medical Glucose Monitor | IoT Edge Sensor Node MCU Core |
Use Scenario: Delivers precise 1.8 V to microcontroller and electrochemical sensor interface in disposable glucose meters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Accuracy-critical LDO ensuring ADC reference stability and consistent sensor excitation voltage. Use Value: ±2.0% output tolerance and <±100 ppm/°C tempco guarantee measurement repeatability across clinical operating temperatures (−10 °C to +50 °C). |
Use Scenario: Powers ARM Cortex-M0+ MCU core in battery-operated LoRaWAN sensor nodes requiring multi-year field deployment. IC Role / Device Role / Timing Role: Enable-gated LDO enabling deep-sleep current reduction to sub-µA system level. Use Value: 40 µA IQ and active-high enable allow host MCU to shut down NCP512SQ18T2G between sensor readings - cutting average system current by >70%. |
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-1802E/MB | 3.0 µA IQ (lower), 250 mV dropout at 250 mA, SOT-23-5 package | Higher max current but larger footprint; less suitable for ultra-thin form factors | Prefer when lowest possible standby current dominates over size and cost |
| Torex XC6206P182MR-G | 1.0 µA IQ, 200 mV dropout at 100 mA, SOT-25 package | SOT-25 has different pinout (no N/C pin); lacks enable function - always-on operation only | Choose when enable control is unnecessary and minimum IQ is paramount |
Compared with MCP1700T-1802E/MB and XC6206P182MR-G, the NCP512SQ18T2G uniquely balances ultra-low IQ (40 µA), enable functionality, SC-88A footprint, and 1.8 V accuracy - making it optimal for space-constrained, battery-gated portable systems requiring both efficiency and design flexibility.
Availability
NCP512SQ18T2G is available at Aetrix Electronics and suitable for cellular phones, handheld medical instruments, and wireless audio devices requiring stable component supply with long-term manufacturability assurance.
Supply support for NCP512SQ18T2G 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, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP512 series belongs to onsemi's ultra-low-IQ linear regulator product line, engineered specifically for extended-battery-life portable electronics where quiescent current, small footprint, and ceramic-capacitor compatibility are primary design drivers.
FAQ
What is the maximum input voltage rating for the NCP512SQ18T2G?
The NCP512SQ18T2G has an absolute maximum input voltage (Vin) rating of 6.0 V. Operation above this level risks permanent damage. For reliable 1.8 V output, minimum recommended input is 1.98 V (1.8 V + 180 mV dropout), and typical operating range is 2.0 V to 5.5 V to ensure margin for line regulation and thermal performance.
Does the NCP512SQ18T2G require an external resistor network to set output voltage?
No, the NCP512SQ18T2G is a fixed-output regulator with internally trimmed 1.8 V reference. It contains on-die resistors and does not support adjustable output - eliminating external feedback components and reducing BOM count and layout area.
Can the NCP512SQ18T2G operate without connecting the Enable pin?
Yes - if the Enable pin is unused, the datasheet specifies it must be tied directly to Vin to ensure the regulator remains enabled. Leaving it floating may cause unpredictable startup behavior or oscillation due to noise coupling.
What is the thermal shutdown threshold for the NCP512SQ18T2G?
The NCP512SQ18T2G incorporates thermal protection that activates at approximately 160 °C junction temperature. Once triggered, the device shuts down output until junction temperature falls below the hysteresis threshold (~140 °C), then automatically resumes regulation.
Is the NCP512SQ18T2G compatible with 1.0 µF ceramic output capacitors?
Yes - the NCP512SQ18T2G is explicitly designed for stability with 1.0 µF ceramic capacitors (X5R/X7R dielectrics), as confirmed in the Applications Information section. Larger values improve transient response and noise filtering but are not required for basic stability.
NCP512SQ18T2G 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 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)
NCP512SQ18T2G FAQ
1.How can I place an order for NCP512SQ18T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ18T2G 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 NCP512SQ18T2G reliable?
The price and inventory of NCP512SQ18T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ18T2G is usually 5 days.
3.What payment methods are accepted for NCP512SQ18T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ18T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ18T2G?
NCP512SQ18T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ18T2G 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 NCP512SQ18T2G?
For technical support, including NCP512SQ18T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ18T2G requirements.
6.How does Aetrix verify that NCP512SQ18T2G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ18T2G 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 NCP512SQ18T2G meets industry standards.
7.What is the process for return or replacement of NCP512SQ18T2G?
All NCP512SQ18T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ18T2G, 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 NCP512SQ18T2G part is unused and in its original packaging.
Return procedure for NCP512SQ18T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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