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onsemi NCP511SN15T1
- Part No.:
- NCP511SN15T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP511SN15T1.pdf
- Description:
- IC REG LINEAR 1.5V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,594
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Product details
Overview
NCP511SN15T1 from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 150 mA at 1.5 V with 40 µA typical quiescent current, 100 mV dropout at 100 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable instrumentation requiring ultra-low power consumption and stable low-voltage rail generation.
For engineers reviewing the NCP511SN15T1 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), industrial temperature range (−40°C to +85°C), and PMOS pass transistor architecture enabling low-noise, high-PSRR regulation in space-constrained designs.
Technical Context
The NCP511SN15T1 integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/current-limit protection circuits - eliminating external compensation and enabling stable operation with low-ESR ceramic output capacitors. Its enable input provides logic-level control (VTH(HI) = 1.3 V, VTH(LO) = 0.3 V) for system-level power sequencing.
Designed for input voltages up to 6.0 V, it maintains regulation down to a 100 mV input-output differential at 100 mA load and delivers 50 dB ripple rejection at 1 kHz. The device features internal thermal shutdown (trip ~160°C) and short-circuit current limiting (200 mA for 1.5 V version).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5 V ±2.0% - tightly regulated rail suitable for powering core logic or analog sensors without external feedback. |
| Max Output Current | 150 mA - sufficient for microcontrollers, RF transceivers, or sensor signal chains in handheld devices. |
| Quiescent Current | 40 µA typical - enables multi-year battery life in always-on monitoring applications. |
| Dropout Voltage | 100 mV at 100 mA - allows operation from depleting single-cell Li-ion (3.0–4.2 V) or two-cell alkaline (2.4–3.2 V) sources. |
| Input Voltage Range | 0 to 6.0 V - supports direct connection to common battery chemistries and intermediate supply rails. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and extended-temperature portable equipment. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 110 µVRMS (20 Hz–100 kHz) - low enough for noise-sensitive analog front-ends and ADC references. |
Pinout & Package
Housed in a 3.00 mm × 1.50 mm × 0.95 mm TSOP-5 surface-mount package (Case 483), the NCP511SN15T1 uses a 5-pin configuration with one no-connect terminal for optimized thermal and electrical performance in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts up to 6.0 V; requires local 1.0 µF decoupling capacitor. |
| 2 | GND | Power ground reference - must be low-impedance connection to minimize noise coupling and ensure regulation stability. |
| 3 | Enable | Active-high digital control - pulls low to disable regulator (ground pin current drops to ≤0.1 µA); connect to Vin if unused. |
| 4 | N/C | No internal connection - left unconnected; not electrically tied to die or substrate. |
| 5 | Vout | Regulated 1.5 V output - supports ≥1.0 µF ceramic or tantalum output capacitor; ESR up to 3.0 Ω accepted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends battery runtime in sleep-mode IoT endpoints and wearables. |
| Low dropout with PMOS pass element | 100 mV @ 100 mA - enables efficient regulation from marginally higher input sources without headroom penalty. |
| Ceramic capacitor compatibility | Stable with ≥1.0 µF X5R/X7R MLCCs - eliminates need for bulkier, higher-ESR tantalum or aluminum electrolytics. |
| Integrated protection | Thermal shutdown (~160°C) and current limit (200 mA) - prevents damage during fault conditions without external circuitry. |
| Precision output accuracy | ±2.0% over −40°C to +85°C - ensures reliable operation of 1.5 V I/O interfaces and low-voltage logic without calibration. |
| Enable-controlled standby | Logic-compatible input with 1.3 V turn-on threshold - simplifies integration into microcontroller GPIO-controlled power domains. |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and analog front-end. IC Role / Device Role / Timing Role: Primary 1.5 V supply for ultra-low-power MCU core and precision ADC reference. Use Value: 40 µA quiescent current enables >3-year battery life on coin cell; ±2.0% accuracy ensures consistent sensor calibration across temperature. |
Use Scenario: Ruggedized multimeter with LCD display, isolated serial interface, and rechargeable Li-ion pack. IC Role / Device Role / Timing Role: Clean 1.5 V rail for microcontroller I/O and real-time clock backup domain. Use Value: 100 mV dropout allows full utilization of battery voltage down to 1.6 V; TSOP-5 footprint saves PCB area in compact enclosure. |
| Wireless Sensor Nodes | Smart Wearables |
|
Use Scenario: Sub-GHz LoRaWAN node powered by two AA alkaline cells (2.4–3.2 V). IC Role / Device Role / Timing Role: Regulated 1.5 V supply for RF transceiver and wake-up timer circuitry. Use Value: Stable operation across entire battery discharge curve due to low dropout and wide input range (0–6.0 V). |
Use Scenario: Fitness tracker with optical heart-rate sensor and BLE SoC operating from single-cell Li-po (3.0–4.2 V). IC Role / Device Role / Timing Role: Low-noise 1.5 V bias for photodiode amplifier and analog signal chain. Use Value: 110 µVRMS output noise prevents interference with weak optical signals; enable pin synchronizes power with sensor acquisition bursts. |
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-1502E/TT | 150 mA, 1.5 V, 1.6 µA IQ, SOT-23-5 package - lower quiescent current but higher 600 mV dropout at 100 mA. | Better for ultra-long-life battery applications where load current is <10 mA; unsuitable for high-current or low-headroom use cases. | Select when minimum IQ dominates design priority and dropout tolerance >600 mV is acceptable. |
| TLC7701QD | 150 mA, 1.5 V, 15 µA IQ, SOIC-8 package - includes reset output and wider input range (2.7–10 V), but larger footprint and no enable pin. | Preferred in automotive diagnostics tools requiring power-on reset signaling and higher input voltage tolerance. | Choose when integrated POR/reset functionality and AEC-Q100 qualification are required over size or enable control. |
Compared with MCP1700T-1502E/TT and TLC7701QD, the NCP511SN15T1 offers optimal balance of ultra-low IQ (40 µA), low dropout (100 mV), enable control, and miniature TSOP-5 packaging - making it uniquely suited for space- and power-constrained portable instrumentation where both efficiency and physical integration matter.
Availability
NCP511SN15T1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, and wireless sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP511SN15T1 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 sensing solutions for automotive, industrial, and portable electronics markets.
The NCP511 series belongs to onsemi's low-power linear regulator product line, engineered specifically for battery-operated handheld instruments and communication devices demanding minimal quiescent current and high output accuracy across temperature.
FAQ
What is the maximum input voltage rating for the NCP511SN15T1?
The NCP511SN15T1 has an absolute maximum input voltage of 6.0 V. Exceeding this rating may cause permanent damage. For inputs above 6.0 V, a pre-regulator stage (e.g., resistive divider or upstream buck converter) is required - as documented in Figure 22 of the NCP511 datasheet. The NCP511SN15T1 itself must never be exposed to voltages beyond its specified limit.
Does the NCP511SN15T1 require an external output capacitor, and what type is recommended?
Yes, the NCP511SN15T1 requires a minimum 1.0 µF output capacitor for stability. Ceramic (X5R/X7R) capacitors are explicitly recommended and fully supported - no ESR constraints apply. Tantalum capacitors are also acceptable. The device remains stable with ESR values up to 3.0 Ω, enabling flexibility in capacitor selection for noise filtering or transient response tuning.
How does the Enable pin function on the NCP511SN15T1, and what happens when it is left unconnected?
The Enable pin on the NCP511SN15T1 is active-high: pulling it below 0.3 V disables the regulator (reducing ground current to ≤0.1 µA), while raising it above 1.3 V enables regulation. If unused, the pin must be tied directly to Vin - floating the pin risks erratic behavior or partial enable states due to noise coupling. No pull-up resistor is needed or recommended.
What is the dropout voltage specification for the NCP511SN15T1 at full load?
At 100 mA output current, the NCP511SN15T1 exhibits a typical dropout voltage of 100 mV (measured when Vout drops 3.0% below nominal). At 150 mA, the maximum dropout is 245 mV (typical) and 350 mV (max), per the Electrical Characteristics table. This low dropout enables efficient operation from aging or low-voltage battery sources.
Is the NCP511SN15T1 qualified for automotive applications?
No - the NCP511SN15T1 is the commercial-grade variant. For automotive use, the pin-compatible NCV511SN15T1G is specified, featuring AEC-Q100 qualification, PPAP capability, and enhanced process controls. The NCP511SN15T1 is rated for industrial temperature range (−40°C to +85°C) but lacks automotive-specific reliability testing and documentation.
NCP511SN15T1 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 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
NCP511SN15T1 FAQ
1.How can I place an order for NCP511SN15T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP511SN15T1 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 NCP511SN15T1 reliable?
The price and inventory of NCP511SN15T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP511SN15T1 is usually 5 days.
3.What payment methods are accepted for NCP511SN15T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP511SN15T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP511SN15T1?
NCP511SN15T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP511SN15T1 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 NCP511SN15T1?
For technical support, including NCP511SN15T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP511SN15T1 requirements.
6.How does Aetrix verify that NCP511SN15T1 is sourced from the original manufacturer or authorized distributors?
All NCP511SN15T1 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 NCP511SN15T1 meets industry standards.
7.What is the process for return or replacement of NCP511SN15T1?
All NCP511SN15T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP511SN15T1, 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 NCP511SN15T1 part is unused and in its original packaging.
Return procedure for NCP511SN15T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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