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onsemi NCP561SN33T1
- Part No.:
- NCP561SN33T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP561SN33T1.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,415
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Product details
Overview
NCP561SN33T1 from onsemi is a fixed 3.3 V, 150 mA CMOS low-dropout linear regulator in TSOP-5 package, featuring 3.0 µA typical quiescent current, 170 mV dropout at full load, and ±2.0% output voltage accuracy - designed for battery-powered handheld instruments requiring stable low-power voltage regulation.
For engineers reviewing the NCP561SN33T1 datasheet, pinout, applications, or equivalent options, key selection criteria include ultralow IQ, ceramic-capacitor compatibility (≥1.0 µF), enable-controlled standby mode, thermal shutdown protection, and industrial temperature range (–40°C to +85°C).
Technical Context
The NCP561SN33T1 integrates a PMOS pass transistor with internal voltage reference, error amplifier, current limit, and thermal shutdown circuitry - enabling stable regulation without external compensation. Its enable input supports logic-level control (VTH(H) = 1.3 V, VTH(L) = 0.2 V) and must be tied to VIN if unused.
Dropout voltage is specified at 130 mV (typ) / 200 mV (max) at 150 mA and 3.3 V output, with line regulation ≤20 mV over 4.5–5.0 V input range and load regulation ≤60 mV across 10–150 mA. Output noise is 60 µVRMS (20 Hz–100 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2.0% - ensures compatible logic-level supply for 3.3 V microcontrollers and sensors |
| Max Output Current | 150 mA - sufficient for low-power MCU cores, RF front-ends, and sensor signal chains |
| Quiescent Current | 3.0 µA typical - enables multi-year battery life in always-on monitoring applications |
| Dropout Voltage | 130 mV typ @ 150 mA - allows operation down to VIN = 3.43 V while maintaining regulation |
| Operating Temp | –40°C to +85°C - qualified for industrial and portable outdoor equipment environments |
| Input Voltage Range | Up to 6.0 V - supports single-cell Li-ion (4.2 V max) and dual-cell alkaline (3.2 V fresh) inputs |
| Enable Threshold | VEN(H) = 1.3 V min, VEN(L) = 0.2 V max - compatible with 1.8 V/3.3 V GPIO without level shifting |
Pinout & Package
Package: TSOP-5 (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), surface-mount, Pb-free option available (NCP561SN33T1G).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive power supply input | Accepts up to 6.0 V; requires ≥1.0 µF ceramic decoupling capacitor placed adjacent to pin |
| 2 - GND | Power ground reference | Low-impedance return path for input/output currents; must connect directly to PCB ground plane |
| 3 - Enable | Logic-controlled enable input | Pull high ≥1.3 V to activate regulator; pull low ≤0.2 V to enter <3.0 µA standby mode |
| 4 - N/C | No internal connection | Not bonded; must remain unconnected - no routing or soldering allowed |
| 5 - VOUT | Regulated output voltage | Delivers stable 3.3 V ±2.0%; supports ≥1.0 µF ceramic or tantalum output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.0 µA typical - extends battery runtime in sleep-mode IoT endpoints |
| Low dropout architecture | 130 mV @ 150 mA - enables efficient use of depleting battery voltage |
| Ceramic capacitor stability | Stable with ≥1.0 µF X5R/X7R ceramics - eliminates need for higher-ESR tantalum |
| Integrated protection | Current limit + thermal shutdown - prevents damage during short-circuit or overload |
| Enable control interface | CMOS-compatible threshold - simplifies direct GPIO control without external logic |
Applications
| Battery-Powered Instruments | Hand-Held Test Equipment |
|---|---|
Use Scenario: Portable multimeter powered by two AA alkaline cells (3.0 V nominal, dropping to 2.4 V under load). IC Role / Device Role / Timing Role: Primary 3.3 V supply regulator for MCU, display driver, and ADC reference. Use Value: Maintains regulation down to VIN = 3.43 V, allowing full instrument operation until battery reaches ~2.8 V under load. | Use Scenario: Handheld oscilloscope probe interface module with Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Clean 3.3 V rail for analog front-end amplifiers and BLE SoC digital core. Use Value: 60 µVRMS output noise ensures minimal interference with µV-level signal measurements. |
| Camcorder Power Management | Industrial Sensor Node |
Use Scenario: Compact camcorder using single-cell Li-ion (4.2 V → 3.0 V discharge curve) powering image sensor and video encoder. IC Role / Device Role / Timing Role: Secondary LDO supplying 3.3 V to CMOS image sensor I/O and clock buffer. Use Value: 170 mV dropout at 150 mA ensures uninterrupted operation through full battery discharge cycle. | Use Scenario: Wireless temperature/humidity node operating on CR2032 coin cell (3.0 V, 225 mAh) with 10-year target lifetime. IC Role / Device Role / Timing Role: Always-on 3.3 V regulator for ultra-low-power MCU and sensor interface. Use Value: 3.0 µA quiescent current enables >8 years of operation in deep-sleep mode (1 µA average system current). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | 250 mV dropout @ 250 mA; 1.6 µA IQ; SOT-23-5 package | Higher dropout limits usable input range; smaller footprint but lower thermal mass | Preferred when board space is constrained and input voltage margin exceeds 3.55 V |
| TLS850B2TE/V1 | 500 mA output; 35 µA IQ; AEC-Q100 qualified; TO-263-5 package | Automotive-grade; higher IQ and larger package unsuitable for portable consumer devices | Only suitable for automotive applications requiring qualification and higher current |
Compared with MCP1700T-3302E/MB and TLS850B2TE/V1, the NCP561SN33T1 offers the lowest quiescent current in its class and optimal dropout performance for 3.3 V systems powered by single Li-ion or dual alkaline cells - balancing efficiency, size, and cost for portable instrumentation.
Availability
NCP561SN33T1 is available at Aetrix Electronics and suitable for battery-powered instruments, hand-held test equipment, camcorders and cameras, and industrial sensor nodes requiring stable component supply with long-term lifecycle support.
Supply support for NCP561SN33T1 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP561 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for ultra-low-power portable electronics where battery life, small footprint, and ceramic capacitor compatibility are critical design constraints.
FAQ
What is the maximum input voltage rating for the NCP561SN33T1?
The NCP561SN33T1 has an absolute maximum input voltage of 6.0 V. Exceeding this rating may cause permanent damage. For reliable operation, the recommended input range is 3.43 V to 6.0 V - ensuring dropout margin while staying within safe operating limits. The NCP561SN33T1 datasheet specifies that operation above 6.0 V requires external pre-regulation, such as the circuit shown in Figure 17.
Does the NCP561SN33T1 require an external output capacitor, and what type is recommended?
Yes, the NCP561SN33T1 requires a minimum 1.0 µF output capacitor for stability. Ceramic capacitors (X5R/X7R dielectrics) are fully supported and preferred due to low ESR and compact size - examples include TDK C2012X5R1C105K or C1608X5R1A105K. Tantalum capacitors are also acceptable. The NCP561SN33T1 does not require minimum ESR, unlike older LDO architectures.
How does the enable pin function on the NCP561SN33T1, and what happens if it's left unconnected?
The enable pin on the NCP561SN33T1 is active-high: pulling it ≥1.3 V turns the regulator on, while pulling it ≤0.2 V disables output and reduces quiescent current to <3.0 µA. If unused, the pin must be tied directly to VIN - floating the enable pin may cause erratic startup or oscillation. The NCP561SN33T1 internal circuitry does not include a pull-up or pull-down resistor on this pin.
What is the thermal shutdown threshold and behavior of the NCP561SN33T1?
The NCP561SN33T1 incorporates an internal thermal shutdown circuit that activates at approximately 160°C junction temperature. When triggered, the device disables output and halts regulation until junction temperature falls below the hysteresis threshold (~140°C). This protects against sustained overloads or poor PCB thermal design. The NCP561SN33T1's RJA is 250°C/W, so proper copper pour under the TSOP-5 exposed pad is essential for >100 mA continuous operation.
Is the NCP561SN33T1 RoHS-compliant and lead-free?
Yes, the NCP561SN33T1 is RoHS-compliant and available in Pb-free packaging. The "G" suffix variant (NCP561SN33T1G) explicitly denotes Pb-free construction per JEDEC J-STD-609. Standard NCP561SN33T1 units shipped after April 2024 also meet Pb-free requirements, as confirmed in onsemi's packaging documentation (BRD8011/D) and mechanical outline 98ARB18753C.
NCP561SN33T1 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 8 µA
- PSRR:
- -
- 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
NCP561SN33T1 FAQ
1.How can I place an order for NCP561SN33T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP561SN33T1 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 NCP561SN33T1 reliable?
The price and inventory of NCP561SN33T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP561SN33T1 is usually 5 days.
3.What payment methods are accepted for NCP561SN33T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP561SN33T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP561SN33T1?
NCP561SN33T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP561SN33T1 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 NCP561SN33T1?
For technical support, including NCP561SN33T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP561SN33T1 requirements.
6.How does Aetrix verify that NCP561SN33T1 is sourced from the original manufacturer or authorized distributors?
All NCP561SN33T1 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 NCP561SN33T1 meets industry standards.
7.What is the process for return or replacement of NCP561SN33T1?
All NCP561SN33T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP561SN33T1, 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 NCP561SN33T1 part is unused and in its original packaging.
Return procedure for NCP561SN33T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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