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onsemi NCP511SN15T1G
- Part No.:
- NCP511SN15T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP511SN15T1G.pdf
- Description:
- IC REG LINEAR 1.5V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,201
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Product details
Overview
NCP511SN15T1G from onsemi is a fixed-output, CMOS-based low-dropout linear regulator delivering 150 mA at 1.5 V with ultra-low 40 µA quiescent current, 100 mV dropout at 100 mA, and ±2.0% output voltage accuracy - designed for battery-powered portable electronics requiring stable low-power voltage regulation.
For engineers reviewing the NCP511SN15T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at light-to-moderate load, thermal shutdown behavior, enable threshold compatibility with 1.8 V/3.3 V logic, and TSOP-5 footprint constraints in space-constrained handheld designs.
Technical Context
The NCP511SN15T1G 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 ceramic output capacitors as low as 1.0 µF and eliminates ESR dependency.
It features an active-high Enable input with 1.3 V turn-on threshold and 0.3 V turn-off threshold, supporting system-level power sequencing. The device operates across −40°C to +85°C ambient temperature and supports input voltages up to 6.0 V, making it suitable for single-cell Li-ion or multi-cell alkaline/battery-derived rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5 V ±2.0% over −40°C to +85°C - ensures stable core/peripheral supply for low-voltage microcontrollers and sensors. |
| Max Output Current | 150 mA - sufficient for powering RF transceivers, display drivers, or sensor signal chains in portable devices. |
| Dropout Voltage | 100 mV at 100 mA - enables regulation from 1.6 V input, critical for extending runtime in single-cell battery applications. |
| Quiescent Current | 40 µA typical - minimizes standby power loss, enabling multi-week battery life in always-on monitoring systems. |
| Input Voltage Range | 0 to 6.0 V - supports direct connection to unregulated battery sources including 2×AA/AAA, LiFePO₄, or boosted DC-DC outputs. |
| Enable Threshold | 1.3 V (ON), 0.3 V (OFF) - compatible with standard GPIOs and allows clean power gating without external level-shifting. |
| Ripple Rejection | 50 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
Pinout & Package
The NCP511SN15T1G 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 input supply rail - must be decoupled with ≥1.0 µF ceramic capacitor placed adjacent to pin 1. |
| 2 | GND | Power ground reference - requires low-impedance PCB plane connection to minimize noise coupling and thermal resistance. |
| 3 | Enable | Active-high digital control input - pulled high to Vin for always-on operation; driven low to disable output and reduce ground current to ≤0.1 µA. |
| 4 | N/C | No internal connection - must remain unconnected; no routing or soldering permitted. |
| 5 | Vout | Regulated 1.5 V output - requires ≥1.0 µF output capacitor; larger values improve transient response and noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends battery life in sleep-mode IoT endpoints without compromising wake-up responsiveness. |
| Low dropout voltage | 100 mV at 100 mA - maintains regulation down to 1.6 V input, maximizing usable capacity of 1.5 V nominal alkaline cells. |
| Stable with ceramic capacitors | Minimum 1.0 µF output capacitance - eliminates need for tantalum or aluminum electrolytics, reducing BOM cost and board area. |
| Integrated protection | Current limit and thermal shutdown - prevents damage during short-circuit events or sustained high-power dissipation in compact enclosures. |
| Precision output accuracy | ±2.0% over full temperature and load range - ensures reliable operation of 1.5 V logic interfaces and analog front-ends without external trimming. |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing powered by coin-cell or small Li-ion battery with multi-day runtime requirement. IC Role / Device Role / Timing Role: Primary 1.5 V supply for ultra-low-power MCU and analog front-end ASIC. Use Value: 40 µA quiescent current directly enables >30-day battery life in sleep mode; 100 mV dropout preserves regulation until battery reaches 1.6 V. |
Use Scenario: Wireless temperature/humidity node deployed in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Local 1.5 V regulator for precision ADC and RF transceiver, isolated from noisy main 3.3 V rail. Use Value: ±2.0% output accuracy ensures consistent ADC reference scaling across −40°C to +85°C; thermal shutdown prevents latch-up during enclosure overheating. |
| Bluetooth Audio Earbud | Portable Barcode Scanner |
|
Use Scenario: Compact earbud PCB where space limits capacitor count and thermal mass, requiring fast transient response to audio processing bursts. IC Role / Device Role / Timing Role: Dedicated 1.5 V supply for DSP core and MEMS microphone biasing. Use Value: Stable operation with 1.0 µF ceramic output cap reduces component count; 50 dB ripple rejection cleans DC-DC switching noise before sensitive analog stages. |
Use Scenario: Handheld scanner using intermittent laser/CMOS imaging, demanding robust power delivery during high-current pulse loads. IC Role / Device Role / Timing Role: Low-noise 1.5 V source for image sensor and laser driver logic. Use Value: 110 µVRMS output noise prevents pixel-level artifacts; current limit protects against accidental short during lens actuation or cable fault. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-quiescent-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/TT | 450 nA quiescent current, 250 mV dropout at 250 mA, SOT-23-5 package. | Lower IQ enables years-long battery life but higher dropout reduces usable cell voltage range. | Prefer for ultra-long-life coin-cell applications where 150 mA peak load is rare. |
| TLS850F0TESK | Automotive-grade AEC-Q100, 50 µA IQ, 150 mA, integrated watchdog and reset - larger HTSSOP-8 package. | Includes safety features (reset, window watchdog) required for automotive body electronics. | Choose when functional safety compliance (ISO 26262 ASIL-B support) is mandatory. |
Compared with NCP511SN15T1G, MCP1700T-1502E/TT offers dramatically lower quiescent current but sacrifices dropout performance and thermal robustness; TLS850F0TESK adds automotive qualification and system supervision at the cost of size and complexity - neither is pin-compatible, and both require layout revision.
Availability
NCP511SN15T1G is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, Bluetooth audio earbuds, and portable barcode scanners requiring stable component supply with guaranteed long-term manufacturability.
Supply support for NCP511SN15T1G 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-operated handheld equipment where minimal quiescent current and small footprint are primary design constraints.
FAQ
What is the maximum input voltage rating for the NCP511SN15T1G?
The NCP511SN15T1G has a maximum input voltage rating of 6.0 V. Exceeding this value may cause 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. The NCP511SN15T1G itself must never see more than 6.0 V at its Vin pin.
Does the NCP511SN15T1G require an external pull-up resistor on the Enable pin?
No, the NCP511SN15T1G does not require an external pull-up resistor on the Enable pin. If the enable function is unused, the datasheet explicitly states that Enable should be connected directly to Vin. This ensures reliable turn-on without additional components, simplifying design and reducing BOM count for always-on configurations.
Can the NCP511SN15T1G operate stably with a 0.47 µF ceramic output capacitor?
No - the NCP511SN15T1G requires a minimum output capacitance of 1.0 µF, as specified in the datasheet. Using 0.47 µF violates the stability condition and risks oscillation or poor transient response. The device is optimized for ≥1.0 µF ceramic capacitors with ESR between a few mΩ and 3.0 Ω; lower values compromise regulation integrity.
What is the thermal shutdown trigger temperature for the NCP511SN15T1G?
The NCP511SN15T1G activates thermal shutdown at approximately 160°C junction temperature, as defined in the "Thermal Protection" section of the datasheet. Once triggered, the regulator disables output until junction temperature falls below the hysteresis threshold (~140°C). This protects the die during sustained overload or inadequate PCB copper pour.
Is the NCP511SN15T1G pin-compatible with other variants in the NCP511 family, such as NCP511SN33T1G?
Yes - all NCP511 variants, including NCP511SN15T1G and NCP511SN33T1G, share identical TSOP-5 pinout and package dimensions (Case 483). The only differences are output voltage and top-side marking (LBU vs. LCA). This allows voltage-scaling flexibility within the same PCB layout, provided input voltage headroom and load requirements are verified per variant.
NCP511SN15T1G 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
NCP511SN15T1G FAQ
1.How can I place an order for NCP511SN15T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP511SN15T1G 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 NCP511SN15T1G reliable?
The price and inventory of NCP511SN15T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP511SN15T1G is usually 5 days.
3.What payment methods are accepted for NCP511SN15T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP511SN15T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP511SN15T1G?
NCP511SN15T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP511SN15T1G 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 NCP511SN15T1G?
For technical support, including NCP511SN15T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP511SN15T1G requirements.
6.How does Aetrix verify that NCP511SN15T1G is sourced from the original manufacturer or authorized distributors?
All NCP511SN15T1G 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 NCP511SN15T1G meets industry standards.
7.What is the process for return or replacement of NCP511SN15T1G?
All NCP511SN15T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP511SN15T1G, 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 NCP511SN15T1G part is unused and in its original packaging.
Return procedure for NCP511SN15T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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