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onsemi NCP512SQ33T2G
- Part No.:
- NCP512SQ33T2G
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
NCP512SQ33T2G.pdf
- Description:
- IC REG LINEAR 3.3V 80MA SC88A
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Inventory:3,143
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Product details
Overview
NCP512SQ33T2G from onsemi is a fixed-output 3.3 V CMOS low-quiescent-current linear voltage regulator in SC-88A (SOT-353) package, delivering up to 80 mA output current with 40 µA typical quiescent current, 180 mV dropout at 80 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring ultra-low standby power.
For engineers reviewing the NCP512SQ33T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.3 V fixed output, SC-88A footprint compatibility, enable-controlled shutdown, ceramic-capacitor stability, and industrial −40 °C to +85 °C operating range.
Technical Context
The NCP512SQ33T2G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection. Its ultra-low 40 µA quiescent current enables multi-year battery life in always-on sensor nodes and low-power IoT endpoints.
It operates with input voltages from 0 V to 6.0 V and maintains regulation down to a 180 mV input–output differential at full 80 mA load. The enable pin provides logic-level control (VTH(HI) = 1.3 V, VTH(LO) = 0.3 V), and the N/C pin (Pin 4) is unconnected internally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2.0% over −40 °C to +85 °C and 1–80 mA load - ensures stable MCU core/logic rail under varying temperature and battery discharge. |
| Quiescent Current | 40 µA typical (Enable = Vin, IOUT = 1 mA); 0.1 µA max in shutdown (Enable = 0 V) - extends shelf life and runtime in battery-critical applications. |
| Dropout Voltage | 180 mV at 80 mA and 3.3 V output - allows operation from single-cell Li-ion (3.0–3.6 V) or two-cell alkaline (up to 3.2 V) without brownout. |
| Input Voltage Range | 0 V to 6.0 V - supports wide-input battery sources including USB (5 V), coin cells, and regulated intermediate rails. |
| Thermal Protection | Internal shutdown at ~160 °C junction temperature - prevents permanent damage during transient overload or poor PCB thermal design. |
| 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 noise-sensitive analog circuits like ADC references or RF bias rails. |
Pinout & Package
Package: SC-88A (SOT-353), 5-pin surface-mount, 2.0 mm × 2.1 mm footprint, Pb-free, moisture-sensitive level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin to ensure stability and transient response. |
| 2 | GND | Power ground reference - requires low-impedance PCB connection to minimize noise coupling and ground bounce. |
| 3 | Enable | Active-high digital control - pulls high to enable regulation; pulls low (<0.3 V) to disable output and reduce quiescent current to 0.1 µA. |
| 4 | N/C | No internal connection - must remain unconnected; no pull-up/down or routing required. |
| 5 | Vout | Regulated 3.3 V output - requires ≥1.0 µF output capacitor (ceramic or tantalum) for stability and load transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >10-year battery life in 10 µA average-load IoT sensors using CR2032 cells. |
| 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 capacitors. |
| Low dropout architecture | 180 mV dropout at 80 mA allows direct regulation from partially discharged Li-ion batteries (≥3.12 V) without headroom loss. |
| Enable-controlled shutdown | Logic-compatible enable pin reduces system-level standby power by disabling LDO output while preserving MCU sleep states. |
| Industrial temperature range | −40 °C to +85 °C operation validated across full electrical specs - suitable for automotive cabin, industrial handhelds, and outdoor edge devices. |
Applications
| Wearable Health Monitor | Smart Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing powered by coin cell or rechargeable LiPo. IC Role / Device Role / Timing Role: Primary 3.3 V power rail regulator for ultra-low-power MCU, analog front-end, and BLE radio. Use Value: 40 µA quiescent current extends battery life beyond 2 years; 180 mV dropout sustains operation until battery reaches 3.12 V. |
Use Scenario: Battery-operated environmental sensor (temp/humidity/pressure) transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Stable 3.3 V supply for microcontroller, sensor interface, and RF transceiver during periodic wake-up bursts. Use Value: Enable pin synchronizes power delivery with sensor acquisition cycles, reducing average system current by >95%. |
| Industrial Handheld Scanner | Portable Medical Diagnostic Tool |
|
Use Scenario: Rugged barcode scanner with backlight, imager, and Bluetooth, powered by dual AA batteries. IC Role / Device Role / Timing Role: Main 3.3 V regulator for processor, display driver, and communication ICs during active scanning mode. Use Value: 80 mA output capacity supports peak current demands of imager and backlight; ±2.0% accuracy ensures consistent ADC reference performance. |
Use Scenario: Portable ultrasound or pulse oximeter using disposable alkaline batteries. IC Role / Device Role / Timing Role: Precision 3.3 V rail for analog signal chain (op-amps, filters, ADC) and low-noise digital logic. Use Value: 180 µVRMS output noise avoids degradation of SNR in sensitive analog measurements; thermal shutdown protects against overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/TT | 3.3 V, 250 mA, 1.6 µA quiescent current, SOT-23-5 package - higher output current but larger footprint and lower PSRR (45 dB @ 1 kHz). | Preferred where higher load current (>80 mA) or deeper sleep current (<2 µA) is required, but not suitable for space-constrained SC-88A layouts. | Select MCP1700T-3302E/TT only if board area permits SOT-23-5 and system load exceeds 80 mA. |
| Torex XC6206P332MR-G | 3.3 V, 250 mA, 1 µA quiescent current, SOT-25 package - lower IQ, same pin count, but 300 mV dropout at 100 mA and no enable pin. | Suitable for always-on, non-controlled applications; lacks enable functionality needed for dynamic power gating. | Choose XC6206P332MR-G when enable control is unnecessary and lowest possible quiescent current is critical. |
Compared with MCP1700T-3302E/TT and XC6206P332MR-G, the NCP512SQ33T2G offers optimal balance of ultra-low IQ, enable control, SC-88A compactness, and 180 mV dropout - making it uniquely suited for space- and battery-limited portable designs requiring programmable power sequencing.
Availability
NCP512SQ33T2G is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, industrial handheld scanners, and portable medical diagnostic tools requiring stable component supply with long-term lifecycle support.
Supply support for NCP512SQ33T2G 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP512SQ33T2G belongs to the NCP512 series of ultra-low-IQ LDO regulators, engineered specifically for extended-battery-life portable electronics where minimal standby power and small form factor are essential design constraints.
FAQ
What is the maximum input voltage rating for the NCP512SQ33T2G?
The NCP512SQ33T2G has an absolute maximum input voltage rating of 6.0 V. Operation above this voltage may cause permanent damage. For reliable 3.3 V regulation, the recommended input range is 3.5 V to 6.0 V to maintain sufficient dropout margin across temperature and load variations.
Does the NCP512SQ33T2G require external capacitors, and what values are recommended?
Yes, the NCP512SQ33T2G requires both input (CIN) and output (COUT) decoupling capacitors. A minimum of 1.0 µF ceramic capacitor is recommended for each, placed as close as possible to the respective pins. Larger values improve transient response and noise rejection, and the device remains stable with ESR from near-zero up to 5 Ω.
Is the NCP512SQ33T2G still in active production, or has it been discontinued?
The NCP512SQ33T2G is marked as discontinued in the official onsemi datasheet revision 16 (January 2026), but Aetrix Electronics maintains active inventory and supply channel access for legacy design support and production continuity through authorized redistribution and lifecycle management programs.
What is the function of Pin 4 (N/C) on the NCP512SQ33T2G?
Pin 4 of the NCP512SQ33T2G is designated N/C (No Connection) and has no internal bond wire or circuit connection. It must remain unconnected on the PCB - no pull-up, pull-down, or routing is permitted, as any external connection may compromise reliability or cause undefined behavior.
How does the enable pin (Pin 3) behave during power-up and shutdown sequences?
The enable pin of the NCP512SQ33T2G is active-high with a logic threshold of 1.3 V (turn-on) and 0.3 V (turn-off). During power-up, output regulation begins once VEN exceeds 1.3 V; during shutdown, output disables and quiescent current drops to ≤0.1 µA when VEN falls below 0.3 V - enabling precise system-level power sequencing for the NCP512SQ33T2G.
NCP512SQ33T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
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NCP512SQ33T2G FAQ
1.How can I place an order for NCP512SQ33T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ33T2G 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 NCP512SQ33T2G reliable?
The price and inventory of NCP512SQ33T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ33T2G is usually 5 days.
3.What payment methods are accepted for NCP512SQ33T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ33T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ33T2G?
NCP512SQ33T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ33T2G 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 NCP512SQ33T2G?
For technical support, including NCP512SQ33T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ33T2G requirements.
6.How does Aetrix verify that NCP512SQ33T2G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ33T2G 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 NCP512SQ33T2G meets industry standards.
7.What is the process for return or replacement of NCP512SQ33T2G?
All NCP512SQ33T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ33T2G, 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 NCP512SQ33T2G part is unused and in its original packaging.
Return procedure for NCP512SQ33T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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