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onsemi NCP511SN50T1
- Part No.:
- NCP511SN50T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP511SN50T1.pdf
- Description:
- IC REG LINEAR 5V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,946
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Product details
Overview
NCP511SN50T1 from onsemi is a fixed-output, CMOS low-dropout linear regulator delivering 5.0 V at up to 150 mA with ultra-low quiescent current (40 µA typical), 100 mV dropout at 100 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable instrumentation requiring stable low-power voltage regulation.
For engineers reviewing the NCP511SN50T1 datasheet, pinout, applications, or equivalent options, key selection criteria include its TSOP-5 package footprint, enable-controlled standby mode, ceramic-capacitor compatibility (≥1.0 µF), and operation across −40°C to +85°C industrial temperature range.
Technical Context
The NCP511SN50T1 integrates a PMOS pass transistor, precision voltage reference, error amplifier, thermal shutdown, and current-limit protection. Its architecture enables stable regulation with minimal external components and no ESR requirements on the output capacitor.
It features an active-high Enable input with logic thresholds (VTH(HI) = 1.3 V, VTH(LO) = 0.3 V), ground pin current tracking load current plus quiescent draw, and ripple rejection of 50 dB at 1 kHz - all optimized for low-noise, low-power embedded systems where supply headroom is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2.0% over −40°C to +85°C, enabling direct replacement of standard 5 V logic rails without trimming. |
| Max Output Current | 150 mA continuous, supporting microcontrollers, sensors, and RF modules in portable devices. |
| Dropout Voltage | 100 mV at 100 mA (measured at −3% VOUT), allowing operation from 5.1 V input when regulating 5.0 V - critical for single-cell Li-ion or 3xAA systems. |
| Quiescent Current | 40 µA typical (Enable = VIN), reducing standby power loss in always-on monitoring circuits. |
| Input Voltage Range | 0 V to 6.0 V maximum, compatible with common battery and intermediate bus voltages while preventing internal overstress. |
| Ripple Rejection | 50 dB at 1 kHz, suppressing switching noise from upstream DC/DC converters feeding the LDO. |
| Thermal Shutdown | Activates at ~160°C junction temperature, protecting against sustained overload or poor PCB thermal design. |
Pinout & Package
The NCP511SN50T1 is housed in a Pb-free TSOP-5 surface-mount package (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive power supply input | Accepts 0–6.0 V; must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin. |
| 2 - GND | Power supply ground reference | Low-impedance return path for both input and output currents; requires solid copper pour for thermal and noise control. |
| 3 - Enable | Active-high regulator control | Pull ≥1.3 V to enable output; pull ≤0.3 V to disable (reducing IQ to 0.1 µA); tie to Vin if unused. |
| 4 - N/C | No internal connection | Not bonded; must remain unconnected - no routing or soldering permitted. |
| 5 - Vout | Regulated 5.0 V output | Delivers up to 150 mA; requires ≥1.0 µF output capacitor (ceramic or tantalum) placed near pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical ensures >1-year battery life in 10 µA average-load IoT sensors using coin cells. |
| Low-ESR capacitor support | Stable with 0–3 Ω output capacitor ESR, eliminating need for specialized low-ESR tantalum or polymer caps. |
| High-accuracy output | ±2.0% tolerance over full temperature and load range reduces need for post-regulation calibration in precision analog front-ends. |
| Enable-controlled shutdown | Reduces ground current to 0.1 µA in disabled state, enabling firmware-controlled power gating of peripheral subsystems. |
| Thermal & current protection | Integrated foldback current limit and thermal shutdown prevent damage during short-circuit or high-ambient conditions. |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
|
Use Scenario: Continuous glucose monitor with Bluetooth LE radio and electrochemical sensor interface. IC Role / Device Role / Timing Role: Primary 5.0 V rail regulator for MCU, BLE SoC, and analog signal chain - powered by CR2032 or rechargeable Li-ion. Use Value: 40 µA quiescent current extends battery life beyond 6 months; 100 mV dropout enables full capacity utilization from declining battery voltage. |
Use Scenario: Ruggedized multimeter with LCD display, isolated serial interface, and auto-ranging ADC. IC Role / Device Role / Timing Role: Clean 5.0 V supply for precision ADC reference, microcontroller core, and display driver - derived from 9 V alkaline stack. Use Value: ±2.0% output accuracy eliminates need for external voltage trim; 50 dB ripple rejection suppresses switching artifacts from internal DC/DC converter. |
| Wireless Sensor Nodes | Automotive Cabin Monitoring |
|
Use Scenario: Zigbee-enabled temperature/humidity node in smart building HVAC system. IC Role / Device Role / Timing Role: Regulator for ultra-low-power MCU, RF transceiver, and capacitive sensing IC - operating from primary AA batteries. Use Value: Enable pin allows deep-sleep mode (0.1 µA) between sensor reads; TSOP-5 footprint minimizes board area in compact enclosure. |
Use Scenario: Occupancy detection module using IR LED array and photodiode array in vehicle cabin. IC Role / Device Role / Timing Role: 5.0 V supply for automotive-grade MCU and analog front-end - powered from 12 V vehicle bus via pre-regulator. Use Value: AEC-Q100 qualified NCV511 variant available; industrial −40°C to +85°C rating ensures reliability across cabin temperature extremes. |
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-5002E/TT | Same 5.0 V output, 250 mA rating, but higher 1.8 µA quiescent current; SOT-23-3 package (no enable pin). | Lacks enable control and thermal shutdown; suitable only for always-on, non-safety-critical loads. | Select only if board space is constrained and enable/shutdown functionality is unnecessary. |
| TLC7705IPK | 5.0 V output, 150 mA, but 125 µA quiescent current; includes reset output; 5-pin SOT-23 package with different pinout. | Provides power-good signaling but higher IQ reduces battery life; not drop-in due to pin assignment mismatch. | Choose when system-level power sequencing or reset assertion is required, and layout can accommodate pin rework. |
Compared with MCP1700T-5002E/TT and TLC7705IPK, the NCP511SN50T1 delivers superior battery runtime via 40 µA IQ and adds robust protection (thermal/current limit) and flexible enable control - making it optimal for portable, safety-aware, and long-life applications.
Availability
NCP511SN50T1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, and wireless sensor nodes requiring stable component supply with guaranteed long-term manufacturability and Pb-free compliance.
Supply support for NCP511SN50T1 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, and sensor solutions for automotive, industrial, and portable electronics.
The NCP511 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-constrained applications demanding ultra-low IQ, small footprint, and high reliability across extended temperature ranges.
FAQ
What is the maximum input voltage rating for the NCP511SN50T1?
The NCP511SN50T1 has an absolute maximum input voltage of 6.0 V. Exceeding this rating risks permanent damage. For inputs above 6.0 V - such as automotive 12 V or industrial 24 V rails - an external pre-regulator stage (e.g., resistive divider with Zener clamp or buck converter) must be used before the NCP511SN50T1 input. The device's internal protection does not cover overvoltage on Vin.
Does the NCP511SN50T1 require a minimum load current to maintain regulation?
No, the NCP511SN50T1 does not require a minimum load current. It remains stable and regulated from zero load up to 150 mA. This is confirmed in the datasheet under "Applications Information", which states the regulator accepts ceramic capacitors with ESR from near-zero up to 3.0 Ω and imposes no minimum output current requirement - simplifying design for intermittent-load applications like wake-on-event sensors.
Can the NCP511SN50T1 be used with ceramic output capacitors?
Yes, the NCP511SN50T1 is explicitly designed for use with low-ESR ceramic capacitors. The datasheet specifies a minimum output capacitance of 1.0 µF and confirms stability across ESR values from near-zero to 3.0 Ω - eliminating the need for bulkier, higher-ESR tantalum or aluminum electrolytic capacitors typically required by older LDO architectures.
What is the function of Pin 4 (N/C) on the NCP511SN50T1?
Pin 4 on the NCP511SN50T1 is marked N/C (No Connection) and has no internal bond wire or circuit connection. It must remain electrically floating - neither tied to ground, Vout, nor any other net. Routing traces to or soldering this pin may cause mechanical stress or unintended coupling; the TSOP-5 package outline confirms it is a dummy pad with no functional role in the NCP511SN50T1.
How does the Enable pin behave during power-up for the NCP511SN50T1?
The NCP511SN50T1 Enable pin is active-high with a rising threshold of 1.3 V and falling threshold of 0.3 V. During power-up, the output remains off until Vin reaches sufficient level *and* Enable rises above 1.3 V. If Enable is tied directly to Vin (standard configuration), turn-on occurs shortly after Vin crosses 1.3 V - ensuring controlled startup without output overshoot, as verified in Figure 13 (Turn-On Response) of the datasheet.
NCP511SN50T1 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):
- 5V
- 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
NCP511SN50T1 FAQ
1.How can I place an order for NCP511SN50T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP511SN50T1 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 NCP511SN50T1 reliable?
The price and inventory of NCP511SN50T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP511SN50T1 is usually 5 days.
3.What payment methods are accepted for NCP511SN50T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP511SN50T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP511SN50T1?
NCP511SN50T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP511SN50T1 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 NCP511SN50T1?
For technical support, including NCP511SN50T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP511SN50T1 requirements.
6.How does Aetrix verify that NCP511SN50T1 is sourced from the original manufacturer or authorized distributors?
All NCP511SN50T1 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 NCP511SN50T1 meets industry standards.
7.What is the process for return or replacement of NCP511SN50T1?
All NCP511SN50T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP511SN50T1, 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 NCP511SN50T1 part is unused and in its original packaging.
Return procedure for NCP511SN50T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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