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onsemi NCP511SN25T1
- Part No.:
- NCP511SN25T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP511SN25T1.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
NCP511SN25T1 from onsemi is a fixed-output, CMOS low-dropout linear voltage regulator delivering 2.5 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 biasing.
For engineers reviewing the NCP511SN25T1 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance under 100 mA load, thermal shutdown behavior at 160°C, enable threshold compatibility with 1.3 V logic high, and TSOP-5 footprint compatibility with ceramic output capacitors ≥1.0 µF.
Technical Context
The NCP511SN25T1 integrates a PMOS pass transistor, precision voltage reference, error amplifier, and protection circuitry (current limit and thermal shutdown) in a single monolithic IC. Its architecture enables stable operation with low-ESR ceramic capacitors and eliminates need for external compensation.
It features an active-high enable input with 1.3 V turn-on threshold and 0.3 V turn-off threshold, supporting low-power standby modes. The device operates across −40°C to +85°C ambient temperature and supports input voltages up to 6.0 V while maintaining regulation down to 2.5 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.0% (ensures stable MCU core or sensor bias within tolerance over temperature and load) |
| Max Output Current | 150 mA (supports moderate-power analog front-ends or microcontroller peripherals) |
| Dropout Voltage | 100 mV at 100 mA (enables operation from 2.6 V input, critical for single-cell Li-ion or alkaline systems) |
| Quiescent Current | 40 µA typical (extends battery life in always-on sensing nodes without compromising regulation) |
| Input Voltage Range | 0 to 6.0 V (compatible with unregulated battery inputs up to 4× alkaline or 2S LiFePO₄) |
| Enable Threshold | 1.3 V logic high / 0.3 V logic low (interfacing directly with GPIOs of most low-voltage MCUs) |
| Thermal Shutdown | Activates at ~160°C junction (prevents damage during sustained overload or poor PCB thermal design) |
Pinout & Package
The NCP511SN25T1 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 profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply rail - must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin |
| 2 | GND | Power ground reference - requires low-impedance connection to system ground plane |
| 3 | Enable | Active-high digital control - pulls low to disable regulator; connect to Vin if unused |
| 4 | N/C | No internal connection - must remain floating or grounded (not driven) |
| 5 | Vout | Regulated 2.5 V output - requires ≥1.0 µF ceramic capacitor; larger values improve transient response |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical enables >1-year battery life in 10 µA average-current IoT sensors |
| Low dropout with PMOS pass element | 100 mV at 100 mA allows use with aging batteries or low-headroom sources |
| Stable with ceramic output capacitors | Supports 1.0–10 µF ceramic caps (no ESR requirement) - reduces BOM cost and board area |
| Integrated protection | Current limit (200–800 mA depending on Vin) and thermal shutdown prevent fault-induced failure |
| Industrial temperature range | −40°C to +85°C ambient rating supports deployment in automotive cabins and outdoor instrumentation |
Applications
| Portable Medical Sensors | Wearable Biometric Monitors |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) using electrochemical sensing with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 2.5 V bias regulator for op-amps, ADC reference, and BLE SoC I/O domain. Use Value: 40 µA quiescent current extends coin-cell lifetime beyond 12 months; 100 mV dropout sustains regulation as battery discharges from 3.0 V to 2.6 V. |
Use Scenario: Optical heart-rate sensor module in smartwatch with photodiode array, LED drivers, and ARM Cortex-M0+. IC Role / Device Role / Timing Role: Dedicated 2.5 V supply for analog signal chain and sensor interface, isolated from noisy digital rails. Use Value: ±2.0% output accuracy ensures consistent photodiode bias and ADC reference stability across temperature; TSOP-5 footprint fits tight wearable PCB layouts. |
| Handheld Test Instruments | Industrial Data Loggers |
Use Scenario: Battery-powered multimeter with LCD, precision voltage reference, and auto-ranging analog circuitry. IC Role / Device Role / Timing Role: Low-noise 2.5 V source for 16-bit SAR ADC reference and op-amp biasing. Use Value: 110 µVRMS output noise (20 Hz–100 kHz) preserves measurement resolution; enable pin allows MCU-controlled power gating between readings. |
Use Scenario: Remote environmental logger using LoRaWAN, temperature/humidity sensors, and flash memory - deployed in unheated enclosures. IC Role / Device Role / Timing Role: Main 2.5 V regulator for microcontroller, RF transceiver, and sensor interface ICs. Use Value: −40°C to +85°C operation ensures reliability in outdoor industrial settings; thermal shutdown prevents latch-up during extended high-temperature exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/MB | 250 mA output, 1.6 µA quiescent current, SOT-23-3 package (no enable pin) | Lacks enable control and thermal shutdown; lower IQ but higher dropout (600 mV @ 250 mA) | Prefer when minimal quiescent current dominates over enable functionality and thermal safety |
| TCS2112-2.5V | 150 mA output, 50 µA IQ, 120 mV dropout @ 100 mA, TSOT-23-5 package | Similar performance envelope but different pinout (enable on Pin 1); not pin-compatible with TSOP-5 | Consider when board layout allows TSOT-23-5 and slightly higher dropout is acceptable |
Compared with MCP1700T-2502E/MB and TCS2112-2.5V, the NCP511SN25T1 offers superior thermal protection, guaranteed enable functionality, and lower dropout - making it preferred for mission-critical portable instrumentation where reliability and low-headroom operation are essential.
Availability
NCP511SN25T1 is available at Aetrix Electronics and suitable for portable medical sensors, wearable biometric monitors, and handheld test instruments requiring stable component supply, long-lifecycle support, and automotive-grade traceability.
Supply support for NCP511SN25T1 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 sensor technologies.
The NCP511SN25T1 belongs to onsemi's NCP511 series of ultra-low-IQ LDO regulators, engineered specifically for battery-powered portable equipment where extended runtime and compact size are critical design constraints.
FAQ
What is the maximum input voltage rating for the NCP511SN25T1?
The NCP511SN25T1 has an absolute maximum input voltage of 6.0 V. Exceeding this rating risks permanent damage. For applications with higher input sources (e.g., 12 V rails), an external pre-regulator stage is required - as documented in Figure 22 of the official datasheet. Operation within 0–6.0 V ensures compliance with all electrical specifications for the NCP511SN25T1.
Does the NCP511SN25T1 require an external output capacitor, and what value is recommended?
Yes, the NCP511SN25T1 requires a minimum 1.0 µF ceramic output capacitor placed adjacent to the Vout pin. The datasheet confirms stable operation with ceramic capacitors ranging from 1.0 µF to 10 µF and ESR values up to 3.0 Ω. Larger values (e.g., 4.7–10 µF) improve load transient response and noise rejection - critical for sensitive analog circuits powered by the NCP511SN25T1.
Is the NCP511SN25T1 pin-compatible with other variants in the NCP511 family?
Yes, all NCP511 variants (e.g., NCP511SN15T1G, NCP511SN30T1G) share identical TSOP-5 pinout and package dimensions. The only differences are output voltage and top-side marking (e.g., LBW for 2.5 V). This allows drop-in replacement across voltage options without PCB redesign - confirmed in the "Ordering Information" table on page 10 of the NCP511/D datasheet for the NCP511SN25T1.
What is the thermal shutdown trigger temperature for the NCP511SN25T1?
The NCP511SN25T1 activates thermal shutdown at approximately 160°C junction temperature, as specified in the "Definitions" section (page 7) and verified in typical characteristics (Figure 2). Once triggered, the device disables output until junction temperature falls below the hysteresis threshold (~140°C). This protects the NCP511SN25T1 during sustained overload or inadequate PCB thermal relief.
Can the NCP511SN25T1 be used in automotive applications?
The NCP511SN25T1 is not automotive-qualified; however, its automotive-grade counterpart - the NCV511SN25T1G - is AEC-Q100 qualified and PPAP capable. While the NCP511SN25T1 shares identical electrical specs and TSOP-5 packaging, it lacks the controlled manufacturing flow and extended qualification testing required for automotive use. For automotive cabin or infotainment modules, specify NCV511SN25T1G instead of NCP511SN25T1.
NCP511SN25T1 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):
- 2.5V
- 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
NCP511SN25T1 FAQ
1.How can I place an order for NCP511SN25T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP511SN25T1 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 NCP511SN25T1 reliable?
The price and inventory of NCP511SN25T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP511SN25T1 is usually 5 days.
3.What payment methods are accepted for NCP511SN25T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP511SN25T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP511SN25T1?
NCP511SN25T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP511SN25T1 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 NCP511SN25T1?
For technical support, including NCP511SN25T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP511SN25T1 requirements.
6.How does Aetrix verify that NCP511SN25T1 is sourced from the original manufacturer or authorized distributors?
All NCP511SN25T1 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 NCP511SN25T1 meets industry standards.
7.What is the process for return or replacement of NCP511SN25T1?
All NCP511SN25T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP511SN25T1, 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 NCP511SN25T1 part is unused and in its original packaging.
Return procedure for NCP511SN25T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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