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onsemi NCP512SQ28T1G
- Part No.:
- NCP512SQ28T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ28T1G.pdf
- Description:
- IC REG LDO LQC 80MA 2.8V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,507
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Product details
Overview
NCP512SQ28T1G from onsemi is a fixed-output CMOS low-quiescent-current linear voltage regulator delivering 2.8 V at up to 80 mA, featuring 40 µA typical quiescent current, 200 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 NCP512SQ28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low IQ, SC-88A (SOT-353) package compatibility, enable-controlled standby mode, ceramic capacitor stability, and industrial −40 °C to +85 °C operation.
Technical Context
The NCP512SQ28T1G 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 of 1.3 V (turn-on) and 0.3 V (turn-off).
It operates with input voltages from 0 V to 6.0 V and maintains regulation down to a 200 mV dropout at full 80 mA load for the 2.8 V variant. Output noise is 180 µVRMS (100 Hz–100 kHz), and ripple rejection reaches 50 dB at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V ±2.0% - tightly regulated rail suitable for MCU core or sensor analog supply without external feedback. |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on IoT sensors and wearables. |
| Dropout Voltage | 200 mV at 80 mA - allows operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) with margin. |
| Enable Threshold | 1.3 V (high), 0.3 V (low) - compatible with 1.8 V/3.3 V GPIO without level-shifting. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and consumer portable equipment environments. |
| Package | SC-88A (SOT-353), 5-pin surface-mount - 2.0 × 2.1 mm footprint ideal for space-constrained handheld PCBs. |
| Stability | Compatible with ≥1.0 µF ceramic output capacitors - eliminates need for tantalum or high-ESR parts. |
Pinout & Package
SC-88A (SOT-353) 5-pin surface-mount package with 0.65 mm pitch; moisture sensitivity level (MSL) 1, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts 0–6.0 V; must be decoupled with ≥1.0 µF ceramic capacitor near pin. |
| 2 | GND | Power ground reference - requires low-impedance PCB plane connection to minimize noise coupling. |
| 3 | Enable | Active-high digital control - pulls low to disable output (IQ < 0.1 µA); tie to Vin if unused. |
| 4 | N/C | No internal connection - left unconnected; no routing or soldering required. |
| 5 | Vout | Regulated 2.8 V output - drives load up to 80 mA; requires ≥1.0 µF ceramic output capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends battery runtime in sleep-mode applications such as remote controls and BLE sensors. |
| Low dropout architecture | 200 mV at 80 mA - enables efficient use of declining battery voltage without premature brownout. |
| Enable-controlled shutdown | Sub-µA standby current when disabled - supports system-level power gating for firmware-controlled power sequencing. |
| Ceramic capacitor compatibility | Stable with 1.0 µF X5R/X7R ceramics - reduces BOM cost and board area vs. tantalum alternatives. |
| Integrated protection | Thermal shutdown (≈160 °C) and current limit - prevents damage during overload or ambient temperature excursions. |
Applications
| Wearable Health Monitor | Industrial Wireless Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Provides clean, low-noise 2.8 V analog supply for ADC and op-amp front-end. Use Value: 180 µVRMS output noise ensures sub-µV signal integrity; 40 µA IQ enables >3-year battery life. |
Use Scenario: LoRaWAN node measuring temperature/humidity in factory environment. IC Role / Device Role / Timing Role: Powers microcontroller and RF transceiver during periodic wake-up bursts. Use Value: Enable pin synchronizes with MCU GPIO to cut regulator IQ to <0.1 µA between transmissions. |
| Portable Barcode Scanner | Smart Home Motion Detector |
|
Use Scenario: Handheld scanner using laser diode and CMOS image sensor. IC Role / Device Role / Timing Role: Supplies 2.8 V to image sensor and laser driver IC from 3.7 V Li-ion cell. Use Value: 200 mV dropout preserves regulation until battery drops to 3.0 V, maximizing usable capacity. |
Use Scenario: PIR-based occupancy detector with wake-on-motion and BLE reporting. IC Role / Device Role / Timing Role: Delivers stable 2.8 V to ultra-low-power MCU and PIR signal conditioner. Use Value: −40 °C to +85 °C rating ensures reliable startup and operation in unconditioned attics or garages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 350 mV dropout at 250 mA; 1.6 µA IQ; SOT-23-3 package (no enable) | Lacks enable pin and has higher dropout - unsuitable for tight-input-margin or controlled-standby designs. | Choose only if enable function is unnecessary and board layout accommodates larger SOT-23 footprint. |
| TNIV280M33X | 250 mV dropout at 150 mA; 2.5 µA IQ; SC-70-5 package; no enable pin | Same package but no enable functionality - requires external MOSFET for shutdown control. | Select when ultra-low IQ dominates over integrated enable, and discrete gate control is acceptable. |
Compared with MCP1700T-2802E/TT and TNIV280M33X, the NCP512SQ28T1G uniquely combines SC-88A footprint, integrated enable, 40 µA IQ, and 200 mV dropout - making it optimal for compact, battery-gated, low-voltage portable systems where all three attributes are required simultaneously.
Availability
NCP512SQ28T1G is available at Aetrix Electronics and suitable for wearable health monitors, industrial wireless sensor nodes, and portable barcode scanners requiring stable component supply with long-lifecycle support.
Supply support for NCP512SQ28T1G 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP512 series belongs to onsemi's low-power linear regulator product line, engineered specifically for ultra-low-IQ battery-powered applications where extended operating life and small form factor are critical design constraints.
FAQ
What is the maximum input voltage rating for the NCP512SQ28T1G?
The NCP512SQ28T1G supports an absolute maximum input voltage of 6.0 V. Exceeding this rating may cause permanent damage. For reliable operation with 2.8 V output, recommended input range is 3.0 V to 5.5 V to maintain sufficient dropout margin and thermal safety under 80 mA load.
Does the NCP512SQ28T1G require an external pull-up resistor on the Enable pin?
No, the NCP512SQ28T1G does not require an external pull-up on the Enable pin. When unused, the Enable pin must be directly connected to Vin to ensure regulation. Internal circuitry does not provide pull-up; leaving it floating may result in undefined output state or increased leakage current.
Can the NCP512SQ28T1G operate with a 1.0 µF ceramic output capacitor?
Yes, the NCP512SQ28T1G is explicitly characterized and stabilized for use with ≥1.0 µF ceramic capacitors (X5R/X7R dielectrics). This eliminates ESR dependency and simplifies layout - unlike older LDOs requiring minimum ESR or tantalum capacitors.
What is the thermal shutdown trigger temperature for the NCP512SQ28T1G?
The NCP512SQ28T1G incorporates thermal protection that activates at approximately 160 °C junction temperature, disabling the output until the die cools below the hysteresis threshold. This safeguard prevents irreversible damage during sustained overload or poor PCB thermal design.
Is the NCP512SQ28T1G pin-compatible with other variants in the NCP512 family?
Yes, all NCP512 variants including NCP512SQ28T1G share identical SC-88A (SOT-353) pinout and package dimensions. Voltage variants differ only in internal resistor network - enabling drop-in replacement across 1.3 V to 5.0 V outputs without PCB redesign.
NCP512SQ28T1G 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:
- -
- Output Type:
- -
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-88A (SC-70-5/SOT-353)
NCP512SQ28T1G FAQ
1.How can I place an order for NCP512SQ28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ28T1G 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 NCP512SQ28T1G reliable?
The price and inventory of NCP512SQ28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ28T1G is usually 5 days.
3.What payment methods are accepted for NCP512SQ28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ28T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ28T1G?
NCP512SQ28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ28T1G 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 NCP512SQ28T1G?
For technical support, including NCP512SQ28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ28T1G requirements.
6.How does Aetrix verify that NCP512SQ28T1G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ28T1G 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 NCP512SQ28T1G meets industry standards.
7.What is the process for return or replacement of NCP512SQ28T1G?
All NCP512SQ28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ28T1G, 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 NCP512SQ28T1G part is unused and in its original packaging.
Return procedure for NCP512SQ28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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