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onsemi NCP511SN28T1G
- Part No.:
- NCP511SN28T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP511SN28T1G.pdf
- Description:
- IC REG LINEAR 2.8V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,550
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Product details
Overview
NCP511SN28T1G from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 2.8 V at up to 150 mA with 40 µA typical quiescent current and 100 mV dropout at 100 mA - designed for battery-powered portable electronics requiring ultra-low power consumption and stable low-voltage rail generation.
For engineers reviewing the NCP511SN28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its TSOP-5 package footprint, enable-controlled standby mode, ±2.0% output accuracy over −40°C to +85°C, compatibility with 1.0 µF ceramic output capacitors, and thermal shutdown protection.
Technical Context
The NCP511SN28T1G 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 regulation with minimal external components and no ESR requirements on the output capacitor.
It operates from 2.8 V to 6.0 V input, supports logic-level enable control (1.3 V turn-on threshold), and maintains regulation under load transients up to 150 mA while rejecting 50 dB of 1 kHz ripple - all within an industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V ±2.0% (ensures stable core/peripheral supply for 2.8 V–biased microcontrollers and sensors) |
| Max Output Current | 150 mA (supports moderate-power RF modules, display drivers, and sensor signal chains) |
| Dropout Voltage | 100 mV at 100 mA (enables operation down to Vin = 2.9 V, extending battery life in single-cell Li-ion or alkaline systems) |
| Quiescent Current | 40 µA typical (minimizes standby drain in always-on IoT nodes and wearables) |
| Input Voltage Range | 0 to 6.0 V (compatible with unregulated battery inputs, including up to 4× alkaline or 2S LiFePO₄) |
| Accuracy vs Temp | ±2.0% from −40°C to +85°C (guarantees consistent performance across automotive cabin and industrial environments) |
| Ripple Rejection | 50 dB at 1 kHz (suppresses switching noise from upstream DC/DC converters feeding the LDO) |
Pinout & Package
The NCP511SN28T1G is housed in a Pb-free TSOP-5 surface-mount package (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts 0–6.0 V; requires local 1.0 µF decoupling capacitor |
| 2 | GND | Power ground reference - must be low-impedance connection to minimize noise coupling |
| 3 | Enable | Active-high digital control - pulls low to disable regulator (IQ drops to 0.1 µA); connect to Vin if unused |
| 4 | N/C | No internal connection - left floating or grounded; no electrical function |
| 5 | Vout | Regulated 2.8 V output - supports 1.0–10 µF ceramic/tantalum capacitors without stability concerns |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 40 µA typical - extends shelf life and runtime in battery-backed memory and real-time clocks |
| Low dropout voltage | 100 mV at 100 mA - enables use with aging batteries or low-headroom input sources |
| Enable control with logic threshold | 1.3 V turn-on / 0.3 V turn-off - compatible with 1.8 V and 3.3 V GPIOs without level-shifting |
| Thermal shutdown protection | Activates at ~160°C - prevents damage during sustained overload or poor PCB thermal design |
| Stable with 1.0 µF ceramic output cap | No minimum ESR requirement - simplifies BOM and reduces cost vs. traditional LDOs needing tantalum |
Applications
| Cellular Phone Power Management | Portable Medical Sensor Node |
|---|---|
Use Scenario: Supplying 2.8 V bias to baseband processor I/O banks and RF front-end ICs in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary low-noise post-regulator for noise-sensitive analog and mixed-signal blocks. Use Value: 50 dB ripple rejection suppresses DC/DC switching artifacts, preserving RF receiver sensitivity and ADC SNR. |
Use Scenario: Powering ultra-low-power ECG/PPG sensor ASICs and BLE radio in wearable patches. IC Role / Device Role / Timing Role: Standby-mode LDO enabling sub-µA system sleep current while maintaining regulated 2.8 V rail. Use Value: 40 µA IQ ensures multi-week battery life on coin cells without compromising wake-up latency. |
| Industrial Handheld Scanner | Automotive Cabin Camera Module |
Use Scenario: Providing clean 2.8 V supply to CMOS image sensor and laser diode driver in rugged barcode scanners. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating sensitive imaging circuitry from noisy motor and display supplies. Use Value: ±2.0% output accuracy over −40°C to +85°C guarantees consistent exposure control and image uniformity across operating conditions. |
Use Scenario: Regulating 2.8 V for image signal processor (ISP) core logic in AEC-Q100 qualified rear-view cameras. IC Role / Device Role / Timing Role: Automotive-grade LDO meeting NCV prefix requirements for PPAP-capable production. Use Value: Thermal shutdown and current limiting protect against fault conditions in sealed, thermally constrained camera housings. |
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-2802E/TT | 250 mA max output, 1.6 µA IQ, SOT-23-5 package, no enable pin | Lacks enable control; better for always-on ultra-low-IQ apps but less flexible for power sequencing | Choose when lowest possible quiescent current is critical and enable functionality is unnecessary. |
| TPS7A0528PDBVR | 200 mA max output, 25 µA IQ, 0.5 V dropout at 100 mA, SOT-23-5, integrated enable | Lower dropout and IQ, but tighter input voltage min (1.4 V) limits battery depth-of-discharge utilization | Prefer when higher efficiency at light loads and lower dropout are needed, and input stays ≥1.4 V. |
Compared with MCP1700T-2802E/TT and TPS7A0528PDBVR, the NCP511SN28T1G offers balanced trade-offs: mid-range IQ with robust enable control, wider input range (0–6.0 V), and proven thermal protection - making it ideal for cost-sensitive, thermally variable portable designs where flexibility and reliability outweigh extreme ultra-low-power demands.
Availability
NCP511SN28T1G is available at Aetrix Electronics and suitable for cellular phones, portable medical instruments, and industrial handheld scanners requiring stable component supply with long-term manufacturability and automotive-qualified variants.
Supply support for NCP511SN28T1G 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 battery-operated portable electronics demanding ultra-low quiescent current, small footprint, and high reliability in thermally constrained environments.
FAQ
What is the maximum input voltage rating for the NCP511SN28T1G?
The NCP511SN28T1G has an absolute maximum input voltage of 6.0 V. Exceeding this rating risks permanent damage. For applications with higher input voltages (e.g., 12 V automotive), an external pre-regulator stage is required - as documented in Figure 22 of the official datasheet. The device is not internally rated for operation above 6.0 V under any condition.
Does the NCP511SN28T1G require a minimum output capacitor, and what type is recommended?
Yes - the NCP511SN28T1G requires a minimum 1.0 µF output capacitor, and ceramic capacitors are explicitly recommended and fully supported. Unlike many older LDOs, it imposes no minimum ESR requirement, enabling use of low-ESR MLCCs for improved transient response and reduced board area. Larger values (up to 10 µF) further enhance load transient suppression.
How does the enable pin function on the NCP511SN28T1G, and what happens when it is left unconnected?
The Enable pin on the NCP511SN28T1G is active-high with a 1.3 V typical turn-on threshold. When pulled low (<0.3 V), the device enters ultra-low-power standby (IQ ≈ 0.1 µA). If unused, the datasheet specifies that Enable must be tied directly to Vin - floating the pin is not permitted and may cause erratic behavior or increased leakage.
Is the NCP511SN28T1G suitable for automotive applications?
The NCP511SN28T1G itself is not automotive-qualified; however, its pin-compatible variant NCV511SN28T1G carries the NCV prefix, is AEC-Q100 qualified, and supports PPAP documentation. For automotive cabin modules requiring 2.8 V regulation, the NCV511SN28T1G is the designated qualified version - the NCP511SN28T1G is intended for industrial and consumer applications.
What thermal protection features does the NCP511SN28T1G include?
The NCP511SN28T1G 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), preventing irreversible damage during sustained overload or inadequate PCB heat sinking. This feature is fully integrated and requires no external components.
NCP511SN28T1G 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):
- 2.8V
- 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
NCP511SN28T1G FAQ
1.How can I place an order for NCP511SN28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP511SN28T1G 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 NCP511SN28T1G reliable?
The price and inventory of NCP511SN28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP511SN28T1G is usually 5 days.
3.What payment methods are accepted for NCP511SN28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP511SN28T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP511SN28T1G?
NCP511SN28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP511SN28T1G 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 NCP511SN28T1G?
For technical support, including NCP511SN28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP511SN28T1G requirements.
6.How does Aetrix verify that NCP511SN28T1G is sourced from the original manufacturer or authorized distributors?
All NCP511SN28T1G 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 NCP511SN28T1G meets industry standards.
7.What is the process for return or replacement of NCP511SN28T1G?
All NCP511SN28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP511SN28T1G, 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 NCP511SN28T1G part is unused and in its original packaging.
Return procedure for NCP511SN28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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