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onsemi NCP571SN12T1G
- Part No.:
- NCP571SN12T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP571SN12T1G.pdf
- Description:
- IC REG LINEAR 1.2V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,307
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Product details
Overview
NCP571SN12T1G from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 1.2 V at up to 150 mA with ultra-low 4.0 µA quiescent current, designed for battery-powered portable electronics requiring high efficiency and stable low-voltage biasing - such as camera sensor rails and microcontroller core supplies.
For engineers reviewing the NCP571SN12T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (max 450 mV at 150 mA), ±3% output accuracy over 25 °C, industrial temperature range (−40 °C to +85 °C), TSOP-5 package compatibility, and enable-controlled standby mode.
Technical Context
The NCP571SN12T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/current-limit protection in a single monolithic IC. Its architecture enables stable regulation with only 0.1 µF ceramic output capacitance and supports input voltages up to 12 V.
Enable functionality provides logic-level control (VTH(H) = 1.3 V, VTH(L) = 0.3 V) to disable the regulator and reduce ground current to <0.1 µA. The device operates without minimum load requirement and maintains stability across ESR values from a few mΩ to 3 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2 V ±3% at 10 mA, ±4% over full −40 °C to +85 °C range - ensures reliable core/bias rail for low-voltage logic and sensors. |
| Max Input Voltage | 12 V - supports direct connection to Li-ion battery packs or 9 V/12 V supply rails without pre-regulation. |
| Dropout Voltage | 350 mV typical / 450 mV max at 150 mA - enables >90% efficiency at 1.2 V output from 3.3 V input. |
| Quiescent Current | 4.0 µA typical at 150 mA load - extends battery life in always-on monitoring circuits. |
| Enable Threshold | Logic-high turn-on at ≥1.3 V, turn-off at ≤0.3 V - compatible with 1.8 V/3.3 V GPIO without level-shifting. |
| Thermal Protection | Internal junction shutdown at +150 °C - prevents damage during sustained overload or poor PCB thermal design. |
| Output Capacitor | Minimum 0.1 µF ceramic - eliminates need for bulky tantalum or electrolytic capacitors; reduces BOM cost and board area. |
Pinout & Package
The NCP571SN12T1G is housed in a Pb-free TSOP-5 surface-mount package (3.0 mm × 1.5 mm × 0.95 mm, 0.95 mm pitch), optimized for space-constrained portable designs. Thermal resistance RJA is 250 °C/W with 1 oz copper on 100 mm² pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.2 V output; connects directly to load and decoupling capacitor (min 0.1 µF). |
| 2 | GND | Power ground reference; must be low-impedance connection to minimize noise and dropout variation. |
| 3 | Enable | Active-high digital control input; pull to Vin for always-on operation or drive with MCU GPIO for dynamic power gating. |
| 4 | VIN | Input supply (0–12 V); requires local 0.1 µF ceramic decoupling capacitor placed adjacent to pin. |
| 5 | NC | No internal connection; manufacturer recommends connecting to GND for mechanical stability and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 4.0 µA typical enables multi-year battery life in IoT endpoint sensors and wearables. |
| Low-Voltage Operation | 1.2 V output with 350 mV dropout allows use with single-cell LiFePO₄ (2.8–3.6 V) or dual-cell alkaline inputs. |
| High Accuracy | ±3% initial tolerance ensures compliance with tight core voltage specs for ARM Cortex-M0+/M3 microcontrollers. |
| Robust Enable Interface | 1.3 V logic-high threshold supports direct interfacing with 1.8 V I/O domains without external level shifters. |
| Thermal & Current Protection | Integrated foldback current limit and thermal shutdown prevent latch-up or catastrophic failure under short-circuit conditions. |
Applications
| Camera Sensor Bias Rail | Portable Medical Monitor Core Supply |
|---|---|
Use Scenario: Powering CMOS image sensor analog and digital cores in compact camcorders and action cameras. IC Role / Device Role / Timing Role: Low-noise, low-IQ LDO providing stable 1.2 V bias for sensor pixel arrays and ADC front-ends. Use Value: Enables clean imaging performance with <100 µV RMS output noise and minimal thermal drift over operating temperature. | Use Scenario: Supplying the 1.2 V core voltage for an ARM-based patient monitor SoC in battery-backed handheld units. IC Role / Device Role / Timing Role: Primary core regulator enabling deep-sleep modes with sub-µA system standby current. Use Value: Reduces total system quiescent draw by >95% compared to standard LDOs, extending clinical-grade battery runtime to >72 hours. |
| Wearable Fitness Tracker MCU Core | Industrial Handheld Data Logger |
Use Scenario: Delivering regulated 1.2 V to the CPU core of an ultra-low-power wearable fitness tracker powered by a 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Enabling dynamic voltage scaling and rapid enable/disable cycles synchronized with motion-sensing duty cycles. Use Value: Achieves 4.0 µA IQ in active regulation and <0.1 µA in shutdown - critical for multi-week continuous operation. | Use Scenario: Providing stable 1.2 V supply to FPGA configuration memory and real-time clock circuitry in ruggedized field data loggers. IC Role / Device Role / Timing Role: Industrial-grade LDO supporting −40 °C to +85 °C ambient operation with no derating. Use Value: Maintains ±4% output accuracy across full temperature range, ensuring reliable SRAM retention and RTC timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 150 mA rating, 2.0 µA IQ, but only 6 V max input and no enable pin. | Suitable for lower-input-voltage systems where enable control is unnecessary. | Choose when input stays below 6 V and GPIO-controlled shutdown is not required. |
| TNIV571SN12T1G | Same pinout and electrical specs, but automotive-grade (AEC-Q100 qualified, −40 °C to +125 °C). | Required for automotive infotainment modules or ADAS subsystems needing extended temperature support. | Select for automotive applications requiring PPAP documentation and higher thermal margin. |
Compared with MCP1700T-1202E/TT, the NCP571SN12T1G offers higher input voltage tolerance (12 V vs. 6 V) and integrated enable control, while TNIV571SN12T1G provides identical functionality with automotive qualification - making NCP571SN12T1G optimal for industrial and consumer portable designs needing robust 12 V compatibility and active power management.
Availability
NCP571SN12T1G is available at Aetrix Electronics and suitable for battery-powered instruments, handheld medical devices, and portable imaging equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for NCP571SN12T1G 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.
The NCP571 series belongs to onsemi's low-power linear regulator product line, engineered specifically for ultra-low-quiescent-current operation in space- and battery-constrained portable applications.
FAQ
What is the maximum input voltage rating for the NCP571SN12T1G?
The NCP571SN12T1G has a maximum input voltage rating of 12 V, as specified in its Absolute Maximum Ratings table. This allows direct integration with common battery sources including single-cell Li-ion (up to 4.2 V), two-cell alkaline (up to 3 V), or regulated 5 V/9 V/12 V rails. Exceeding 12 V may cause permanent damage per datasheet stress limits.
Does the NCP571SN12T1G require an external resistor network for enable functionality?
No, the NCP571SN12T1G does not require external resistors for basic enable operation. Its enable pin accepts logic-high signals ≥1.3 V (relative to GND) and logic-low ≤0.3 V. If interfaced with a higher-voltage GPIO (e.g., 5 V), a resistor divider is recommended - but for 1.8 V or 3.3 V MCU outputs, direct connection is fully supported and verified in the NCP571SN12T1G datasheet.
What is the minimum output capacitance required for stable operation of the NCP571SN12T1G?
The NCP571SN12T1G requires a minimum output capacitance of 0.1 µF ceramic, as confirmed in both the Electrical Characteristics and Applications Information sections of the official datasheet. Larger values improve transient response and noise rejection, but stability is guaranteed down to this value - eliminating need for ESR tuning or specialized capacitor types.
Is the NCP571SN12T1G pin-compatible with other variants in the NCP571 family?
Yes, all TSOP-5 packaged NCP571 variants - including NCP571SN08T1G, NCP571SN09T1G, NCP571SN10T1G, and NCP571SN12T1G - share identical pinout, package dimensions, and thermal pad layout. Output voltage is set internally, so swapping between 0.8 V, 0.9 V, 1.0 V, and 1.2 V versions requires only firmware or schematic revision - no PCB redesign.
What thermal derating applies to the NCP571SN12T1G at elevated ambient temperatures?
The NCP571SN12T1G's thermal performance is defined by RJA = 250 °C/W (TSOP-5, 1 oz copper, 100 mm² pad). At 25 °C ambient, maximum safe power dissipation is ~400 mW. As ambient rises, allowable power drops linearly: at +70 °C ambient, max dissipation falls to ~220 mW. Derating curves are provided in Figure 5–6 of the NCP571SN12T1G datasheet.
NCP571SN12T1G 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):
- 12V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 10mA
- 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
NCP571SN12T1G FAQ
1.How can I place an order for NCP571SN12T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP571SN12T1G 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 NCP571SN12T1G reliable?
The price and inventory of NCP571SN12T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP571SN12T1G is usually 5 days.
3.What payment methods are accepted for NCP571SN12T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP571SN12T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP571SN12T1G?
NCP571SN12T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP571SN12T1G 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 NCP571SN12T1G?
For technical support, including NCP571SN12T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP571SN12T1G requirements.
6.How does Aetrix verify that NCP571SN12T1G is sourced from the original manufacturer or authorized distributors?
All NCP571SN12T1G 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 NCP571SN12T1G meets industry standards.
7.What is the process for return or replacement of NCP571SN12T1G?
All NCP571SN12T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP571SN12T1G, 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 NCP571SN12T1G part is unused and in its original packaging.
Return procedure for NCP571SN12T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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