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onsemi NCP511SN18T1G
- Part No.:
- NCP511SN18T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP511SN18T1G.pdf
- Description:
- IC REG 150MA 1.8V LDO ENAB 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,696
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Product details
Overview
NCP511SN18T1G from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 1.8 V at up to 150 mA with ultra-low 40 µA quiescent current and 100 mV dropout at 100 mA. It integrates PMOS pass transistor, thermal shutdown, current limit, and enable control - designed for battery-powered portable electronics requiring stable low-voltage supply under light-load conditions.
For engineers reviewing the NCP511SN18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include output accuracy (±2.0%), industrial temperature range (−40°C to +85°C), TSOP-5 package compatibility, ceramic capacitor support (≥1.0 µF), and enable threshold behavior (logic-high turn-on at ≥1.3 V).
Technical Context
The NCP511SN18T1G employs a PMOS pass transistor architecture enabling low dropout and near-zero ground current increase under load. Its internal error amplifier compares feedback from a precision voltage reference against the regulated output, driving the pass device to maintain 1.8 V within ±2.0% across temperature and line/load variations.
Enable functionality provides active-high control with defined turn-on/turn-off thresholds (1.3 V high, ≤0.3 V low), while integrated thermal shutdown (trip ~160°C) and current limit (~200 mA for 1.8 V version) ensure safe operation during fault conditions without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% (ensures stable core logic or RF bias supply within tight tolerance) |
| Max Output Current | 150 mA (supports microcontrollers, sensors, or low-power peripherals without derating) |
| Dropout Voltage | 100 mV at 100 mA (enables regulation from 1.9 V input, critical for single-cell Li-ion or NiMH systems) |
| Quiescent Current | 40 µA typical (extends battery life in always-on or sleep-mode applications) |
| Input Voltage Range | 0 to 6.0 V (compatible with common battery stacks and intermediate rail supplies) |
| Operating Temperature | −40°C to +85°C (meets industrial-grade environmental requirements) |
| Ripple Rejection | 50 dB at 1 kHz (suppresses switching noise from upstream DC-DC converters) |
| Output Noise | 110 µVRMS (20 Hz–100 kHz) (suitable for noise-sensitive analog circuitry) |
Pinout & Package
The NCP511SN18T1G is housed in a 5-pin TSOP-5 surface-mount package (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), optimized for space-constrained portable designs and compatible with standard reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply connection; must be decoupled with ≥1.0 µF capacitor near the pin |
| 2 | GND | Power ground reference; low-impedance return path essential for stability and noise immunity |
| 3 | Enable | Active-high digital control input; pulls low to disable regulator and reduce quiescent current to ≤0.1 µA |
| 4 | N/C | No internal connection; must remain unconnected or floating (not tied to any potential) |
| 5 | Vout | Regulated 1.8 V output; requires ≥1.0 µF output capacitor (ceramic or tantalum) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >1-year battery life in 10 µA average-current IoT endpoints |
| Low dropout voltage | 100 mV at 100 mA allows operation from aging or partially discharged batteries without brownout |
| High output accuracy | ±2.0% over −40°C to +85°C ensures reliable logic-level compliance for 1.8 V I/O domains |
| Integrated protection | Thermal shutdown and current limit eliminate need for external fault-handling circuitry |
| Ceramic capacitor compatible | Stable with ≥1.0 µF low-ESR ceramic output caps - reduces BOM count and board area vs. tantalum |
| Enable control with defined thresholds | Logic-compatible enable (1.3 V min high, ≤0.3 V max low) supports direct interfacing with MCU GPIOs |
Applications
| Wearable Health Sensor Node | Industrial Handheld Scanner |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition powered by coin cell or rechargeable Li-ion. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.8 V supply to analog front-end and ultra-low-power MCU core. Use Value: 40 µA quiescent current extends battery runtime; 110 µVRMS noise prevents signal corruption in sub-mV biomedical measurements. |
Use Scenario: Ruggedized barcode scanner operating in warehouses with wide ambient temperature swings. IC Role / Device Role / Timing Role: Regulates 1.8 V for CMOS image sensor interface and flash memory I/O. Use Value: −40°C to +85°C rating ensures startup and operation in cold storage or hot loading docks; ±2.0% accuracy maintains data integrity during read/write cycles. |
| Smart Meter Communication Module | Wireless Remote Control MCU |
|
Use Scenario: NB-IoT or LoRaWAN module inside utility meter, powered by primary lithium battery for 10+ year life. IC Role / Device Role / Timing Role: Supplies 1.8 V to RF transceiver and secure element during brief transmission bursts. Use Value: 100 mV dropout enables full battery utilization down to 1.9 V; enable pin synchronizes power with transmit schedule to minimize idle drain. |
Use Scenario: Sub-GHz remote control using CR2032 battery, requiring long shelf life and instant wake-up. IC Role / Device Role / Timing Role: Powers 1.8 V logic of low-energy MCU and encoder IC between button presses. Use Value: 0.1 µA shutdown current (enable = low) eliminates parasitic drain; fast turn-on (<100 µs) ensures responsive user interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 150 mA, 4 µA IQ, SOT-23-5 package, 250 mV dropout at 100 mA | Lower quiescent current but higher dropout limits usable input range | Prefer when ultra-low IQ dominates over input headroom constraints |
| Torex XC6206P182MR-G | 150 mA, 1.0 µA IQ, SOT-25 package, 160 mV dropout at 100 mA, no enable pin | Lacks enable control and has higher dropout; smaller footprint | Choose only if enable functionality is unnecessary and board space is severely constrained |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the NCP511SN18T1G offers the best balance of ultra-low IQ (40 µA), low dropout (100 mV), and integrated enable - making it optimal for battery-powered systems requiring both extended runtime and dynamic power gating.
Availability
NCP511SN18T1G is available at Aetrix Electronics and suitable for wearable health monitors, industrial handheld scanners, smart meter communication modules, and wireless remote controls requiring stable component supply with guaranteed long-term availability.
Supply support for NCP511SN18T1G 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 NCP511 series belongs to onsemi's low-power linear regulator product line, engineered specifically for portable and battery-operated devices where quiescent current, dropout voltage, and small-footprint packaging are critical design constraints.
FAQ
What is the maximum input voltage for NCP511SN18T1G?
The NCP511SN18T1G supports an absolute maximum input voltage of 6.0 V. Exceeding this rating may cause permanent damage. For reliable operation, Vin should remain within 0 V to 6.0 V, with recommended margin for ripple and transients. The device achieves 100 mV dropout at 100 mA, so minimum functional input is 1.9 V for 1.8 V output.
Does NCP511SN18T1G require an external capacitor on the Enable pin?
No, the NCP511SN18T1G does not require an external capacitor on the Enable pin. The enable input is CMOS-compatible with defined logic thresholds (≥1.3 V for ON, ≤0.3 V for OFF). If unused, Enable should be tied directly to Vin per datasheet guidance - adding capacitance introduces unintended delay and is not supported.
Can NCP511SN18T1G operate with a 1.0 µF ceramic output capacitor?
Yes, the NCP511SN18T1G is explicitly characterized and stabilized with a minimum 1.0 µF ceramic output capacitor. The datasheet confirms stability across ESR values from a few mΩ up to 3.0 Ω, making it compatible with standard X5R/X7R MLCCs without requiring special low-ESR types or series resistance.
What is the thermal shutdown trip temperature for NCP511SN18T1G?
The NCP511SN18T1G incorporates internal thermal shutdown that activates at approximately 160°C junction temperature. Once triggered, the regulator disables output until junction temperature falls below the hysteresis threshold (~140°C), protecting against sustained overload or poor PCB thermal design. This feature operates independently of external components.
Is NCP511SN18T1G pin-compatible with other voltages in the NCP511 series?
Yes, all NCP511 variants - including NCP511SN15T1G, NCP511SN18T1G, NCP511SN25T1G, and others - share identical TSOP-5 pinout and package dimensions. Only the output voltage and top-side marking differ. This enables drop-in replacement during design iteration or voltage optimization without layout changes.
NCP511SN18T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 0.2V @ 100mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- 100 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:
- 5-TSOP
NCP511SN18T1G FAQ
1.How can I place an order for NCP511SN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP511SN18T1G 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 NCP511SN18T1G reliable?
The price and inventory of NCP511SN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP511SN18T1G is usually 5 days.
3.What payment methods are accepted for NCP511SN18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP511SN18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP511SN18T1G?
NCP511SN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP511SN18T1G 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 NCP511SN18T1G?
For technical support, including NCP511SN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP511SN18T1G requirements.
6.How does Aetrix verify that NCP511SN18T1G is sourced from the original manufacturer or authorized distributors?
All NCP511SN18T1G 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 NCP511SN18T1G meets industry standards.
7.What is the process for return or replacement of NCP511SN18T1G?
All NCP511SN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP511SN18T1G, 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 NCP511SN18T1G part is unused and in its original packaging.
Return procedure for NCP511SN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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