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onsemi NCP512SQ18T1G
- Part No.:
- NCP512SQ18T1G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCP512SQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 80MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:1,056
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Product details
Overview
NCP512SQ18T1G 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 supply regulation.
For engineers reviewing the NCP512SQ18T1G datasheet, pinout, applications, or equivalent options, key selection considerations include ultra-low IQ, SC-88A (SOT-353) package compatibility, enable-controlled standby mode, and ceramic-capacitor stability in space-constrained handheld systems.
Technical Context
The NCP512SQ18T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/current-limit protection - enabling stable regulation with minimal external components. Its enable input provides logic-level control of output state, while internal circuitry ensures operation across −40 °C to +85 °C ambient.
This device operates as a low-dropout regulator (LDO) with dropout defined at 3.0% VOUT deviation; for the 1.8 V variant, dropout is 200 mV (typ) at 80 mA over temperature. Ground current scales linearly with load (40 µA typ at 1 mA, 90 µA max at full load), supporting precise power budgeting in always-on subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% - tightly regulated rail for 1.8 V logic, memory, or RF biasing without external feedback. |
| Quiescent Current | 40 µA typical - enables multi-year battery life in IoT sensors and standby circuits. |
| Dropout Voltage | 200 mV max at 80 mA, −40 °C to +85 °C - supports regulation from 2.0 V input, critical for single-cell Li-ion or alkaline systems. |
| Load Regulation | 0.3–0.8 mV/mA - ensures <±5 mV output shift across full 1–80 mA load range, suitable for noise-sensitive analog blocks. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| 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 × 0.9 mm footprint ideal for compact PCB layouts. |
Pinout & Package
SC-88A (SOT-353) package: 5-pin, 0.65 mm pitch, Pb-free, micro-miniature surface-mount outline per case 419A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Input power supply | Accepts 2.0–6.0 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 wide copper to minimize noise coupling. |
| 3 (Enable) | Logic-controlled output enable | Active-high input: ≥1.3 V turns regulator on; ≤0.3 V disables output and reduces IQ to 0.1 µA. |
| 4 (N/C) | No internal connection | Unbonded pad - must remain floating or grounded; no electrical function or thermal benefit. |
| 5 (Vout) | Regulated output | Delivers stable 1.8 V ±2%; requires 1.0 µF output capacitor (ceramic or tantalum) placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >10-year battery life in coin-cell-powered devices at 10 µA average load. |
| 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 | Reduces total system IQ to sub-µA levels when disabled, supporting deep-sleep modes in microcontroller-based systems. |
| Thermal and current protection | Internal foldback current limit and thermal shutdown at ~160 °C prevent damage during overload or poor PCB heatsinking. |
| Precision output accuracy | ±2.0% over temperature and line/load ensures reliable operation of 1.8 V I/O interfaces without calibration. |
Applications
| Cellular Phone Baseband | Wearable Sensor Node |
|---|---|
Use Scenario: Powering 1.8 V digital baseband processor and memory in GSM/UMTS handsets with single Li-ion cell. IC Role / Device Role / Timing Role: Primary low-noise, low-IQ LDO supplying core logic voltage; replaces discrete regulators with higher dropout and leakage. Use Value: Enables 2.0 V minimum input operation, extending usable battery range by ~15% versus older 2.2 V-dropout regulators. |
Use Scenario: Supplying 1.8 V to MEMS accelerometer, BLE radio, and ultra-low-power MCU in fitness tracker. IC Role / Device Role / Timing Role: Always-on LDO for sensor biasing; enabled only during measurement bursts via MCU GPIO. Use Value: 40 µA IQ and 0.1 µA shutdown current reduce average system power by >30% versus standard LDOs. |
| Portable Medical Monitor | Digital Camera Image Sensor Bias |
Use Scenario: Providing clean 1.8 V rail to ADC front-end and low-power display controller in handheld ECG device. IC Role / Device Role / Timing Role: Noise-sensitive analog supply LDO; decoupled with 1 µF X5R ceramic to suppress switching artifacts. Use Value: 50 dB ripple rejection at 1 kHz attenuates DC/DC converter noise, improving effective resolution by ≥1 LSB. |
Use Scenario: Biasing 1.8 V I/O interface of CMOS image sensor in compact camcorder module. IC Role / Device Role / Timing Role: Load-transient-optimized LDO ensuring stable VIO during rapid pixel readout bursts. Use Value: <±10 mV load transient deviation (1–60 mA step) prevents data corruption in high-speed serial sensor links. |
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-1802E/MB | 2.3 µA typical IQ, 6 V max input, SOT-23-3 package (no enable pin) | Lacks enable control; requires external logic for shutdown; smaller footprint but no N/C pin flexibility | Preferred when lowest possible IQ dominates and enable functionality is unnecessary. |
| TCS2118-1.8V | 50 µA IQ, 150 mV dropout at 80 mA, same SC-88A package, integrated reverse-voltage protection | Includes reverse-battery protection; slightly higher IQ but better fault tolerance in field-replaceable batteries | Chosen when reverse-polarity risk exists and 10 µA IQ penalty is acceptable. |
Compared with MCP1700T-1802E/MB and TCS2118-1.8V, the NCP512SQ18T1G uniquely balances ultra-low IQ, enable control, and SC-88A compatibility - making it optimal for space-constrained, battery-gated systems where both standby efficiency and active-mode precision matter.
Availability
NCP512SQ18T1G is available at Aetrix Electronics and suitable for cellular phones, wearable sensor nodes, and portable medical monitors requiring stable component supply with long-lifecycle support.
Supply support for NCP512SQ18T1G 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 focused on energy-efficient electronics, with leadership in power management, analog, and sensing technologies.
The NCP512 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated portable devices demanding ultra-low quiescent current and small-footprint integration.
FAQ
What is the maximum input voltage rating for the NCP512SQ18T1G?
The NCP512SQ18T1G has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable 1.8 V output regulation, the recommended input range is 2.0 V to 6.0 V, with dropout performance optimized above 2.0 V.
Does the NCP512SQ18T1G require an external pull-up resistor on the Enable pin?
No - the NCP512SQ18T1G does not require an external pull-up on the Enable pin. If unused, Enable should be directly connected to Vin to ensure default-on operation. The internal threshold is 1.3 V (turn-on) and 0.3 V (turn-off), compatible with standard CMOS logic levels.
Can the NCP512SQ18T1G operate with a 1.0 µF ceramic output capacitor?
Yes - the NCP512SQ18T1G is explicitly designed for stability with 1.0 µF ceramic capacitors (X5R/X7R), including low-ESR types. This eliminates the need for larger or higher-ESR tantalum capacitors, reducing cost and board area while maintaining phase margin >45°.
What is the dropout voltage of the NCP512SQ18T1G at 80 mA and −40 °C?
At 80 mA load and −40 °C, the NCP512SQ18T1G exhibits a maximum dropout voltage of 350 mV. This value is confirmed in the Electrical Characteristics table under "Dropout Voltage" for the 1.8 V version across the full temperature range.
Is the NCP512SQ18T1G RoHS-compliant and Pb-free?
Yes - the NCP512SQ18T1G is a Pb-free device, compliant with RoHS Directive 2011/65/EU. The "G" suffix and marking diagram confirm Pb-free packaging, and the device meets JEDEC J-STD-020 moisture sensitivity level MSL3.
NCP512SQ18T1G 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)
NCP512SQ18T1G FAQ
1.How can I place an order for NCP512SQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP512SQ18T1G 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 NCP512SQ18T1G reliable?
The price and inventory of NCP512SQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP512SQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP512SQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP512SQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP512SQ18T1G?
NCP512SQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP512SQ18T1G 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 NCP512SQ18T1G?
For technical support, including NCP512SQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP512SQ18T1G requirements.
6.How does Aetrix verify that NCP512SQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP512SQ18T1G 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 NCP512SQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP512SQ18T1G?
All NCP512SQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP512SQ18T1G, 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 NCP512SQ18T1G part is unused and in its original packaging.
Return procedure for NCP512SQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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