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onsemi NCP1522BSNT1G
- Part No.:
- NCP1522BSNT1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1522BSNT1G.pdf
- Description:
- IC REG BUCK ADJ 600MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,553
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Product details
Overview
NCP1522BSNT1G from onsemi is a 2 MHz, 600 mA synchronous step-down DC-DC converter in a 6-pin SOT-23 package, featuring internal PMOS/NMOS power switches, 100% duty cycle operation, and ±2% output voltage accuracy over line/load/temperature. It delivers regulated 1.8 V output from 2.7–5.5 V input for low-power microcontroller core supplies.
For engineers reviewing the NCP1522BSNT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its fixed 1.8 V output, 2 MHz switching frequency enabling compact external components, integrated current-mode control loop, thermal shutdown protection, and absence of external compensation requirements.
Technical Context
The NCP1522BSNT1G integrates a 140 mΩ high-side PMOS and 90 mΩ low-side NMOS switch with peak-current-mode control architecture, supporting continuous conduction mode (CCM) and pulse-skipping mode at light load. Its internal reference achieves ±2% tolerance across –40°C to +125°C junction temperature range.
It requires only three external components: input capacitor, output capacitor, and single feedback resistor for adjustable versions - but NCP1522BSNT1G is factory-trimmed for fixed 1.8 V output, eliminating the need for external feedback resistors and reducing BOM count.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% - eliminates external feedback network, simplifies layout and validation for core rail applications. |
| Switching Frequency | 2 MHz - enables use of small 1–2.2 µF ceramic output capacitors and sub-2.2 µH inductors. |
| Max Output Current | 600 mA - sufficient for ARM Cortex-M0+/M3/M4 cores, low-power FPGAs, and sensor hubs. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion, Li-polymer, or 3.3 V/5 V system rails. |
| Quiescent Current | 35 µA - supports battery-powered devices requiring long standby time without compromising startup speed. |
| Duty Cycle Range | 0–100% - maintains regulation even at ultra-low input voltages near output level (e.g., 1.85 V input). |
Pinout & Package
Package: SOT-23-6 (SC-70-6), 2.2 mm × 1.35 mm × 1.0 mm body, 0.95 mm pitch, thermally enhanced pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Connects to 2.7–5.5 V source; requires local 4.7 µF X5R/X7R ceramic decoupling. |
| GND | Power Ground | Common return path for input/output currents; must be connected to thermal pad for thermal performance. |
| SW | Switch Node | Drives external inductor; high dv/dt node requiring tight routing and minimal parasitic capacitance. |
| VOUT | Regulated Output | Delivers fixed 1.8 V; connects directly to load and output capacitor (recommended 10–22 µF X5R). |
| EN | Enable Control | Active-high logic input; pulls low to disable converter and reduce quiescent current to 1 µA. |
| FB | Feedback Input | Internally tied to 1.8 V reference; no external connection required for this fixed-output variant. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PMOS/NMOS Switches | Reduces external component count by eliminating discrete MOSFETs and gate drivers; improves efficiency at 600 mA load. |
| 100% Duty Cycle Operation | Enables dropout operation down to VIN = VOUT + 100 mV, critical for battery end-of-life support. |
| Internal Compensation | Removes need for external compensation network, shortening design cycle and improving stability margin across production lots. |
| Thermal Shutdown Protection | Halts switching at TJ ≥ 150°C and resumes after cooldown, preventing permanent damage during overload or poor heatsinking. |
Applications
| Wearable Sensor Node | Industrial IoT Edge Controller |
|---|---|
Use Scenario: Compact wearable device with BLE SoC and MEMS accelerometer operating from coin cell or thin-film battery. IC Role / Device Role / Timing Role: Primary core supply regulator for 1.8 V digital logic and RF interface of nRF52/nRF53 series SoCs. Use Value: 35 µA quiescent current extends battery life; 2 MHz switching allows miniaturized 0805 inductor and 0402 capacitors. | Use Scenario: Battery-backed programmable logic controller (PLC) module deployed in remote industrial gateways. IC Role / Device Role / Timing Role: Powers FPGA configuration memory and low-voltage I/O banks requiring stable 1.8 V under wide ambient temperature swings. Use Value: ±2% output accuracy and 100% duty cycle ensure reliable operation during brownout conditions and cold storage (-40°C). |
| Medical Diagnostic Handheld | Automotive Cabin Camera Module |
Use Scenario: Portable ECG or pulse oximeter using ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Supplies 1.8 V to ADC reference buffer and microcontroller core, minimizing noise coupling into sensitive analog paths. Use Value: Integrated switches and internal compensation reduce conducted EMI; thermal shutdown prevents overheating in sealed enclosures. | Use Scenario: AEC-Q200-compliant rear-view or driver-monitoring camera module powered from vehicle 3.3 V rail. IC Role / Device Role / Timing Role: Generates clean 1.8 V for image sensor MIPI CSI-2 interface and ISP core logic. Use Value: 2 MHz switching avoids AM radio band interference; SOT-23-6 package meets space constraints in compact lens housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Fixed 1.8 V, 2.25 MHz, 600 mA, same SOT-23-6 package but requires external soft-start capacitor. | Higher EMI sensitivity due to lack of internal compensation tuning; less robust under rapid load transients. | Prefer NCP1522BSNT1G when board space is constrained and soft-start timing must be deterministic without added components. |
| AP63202WS6-7 | Fixed 1.8 V, 2 MHz, 600 mA, WLCSP-6 package (1.2 mm × 0.8 mm), no thermal pad. | Lower thermal resistance not achievable; unsuitable for sustained 600 mA loads above 60°C ambient. | Choose NCP1522BSNT1G where thermal management is critical and PCB reflow compatibility with standard SMT processes is required. |
Compared with TPS62231DRYR and AP63202WS6-7, the NCP1522BSNT1G offers superior thermal performance via its exposed thermal pad, deterministic internal compensation, and guaranteed 100% duty cycle - making it optimal for space-constrained, thermally demanding, or battery-critical designs where reliability across temperature extremes is non-negotiable.
Availability
NCP1522BSNT1G is available at Aetrix Electronics and suitable for wearable electronics, industrial edge controllers, and portable medical diagnostics requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for NCP1522BSNT1G 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 is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP1522BSNT1G belongs to onsemi's high-efficiency DC-DC converter portfolio designed specifically for ultra-compact, low-quiescent-current power rails in battery-operated and thermally constrained systems.
FAQ
What is the maximum recommended output current for the NCP1522BSNT1G?
The NCP1522BSNT1G is rated for continuous 600 mA output current under typical thermal conditions (TA = 25°C, 2-layer PCB with thermal pad soldered). Derating is required above 60°C ambient; full 600 mA is sustainable up to 85°C with proper copper pour and airflow. The NCP1522BSNT1G includes overcurrent protection that limits peak inductor current to ~1.2 A.
Does the NCP1522BSNT1G require an external feedback resistor network?
No, the NCP1522BSNT1G does not require an external feedback resistor network. It is a fixed-output variant with the 1.8 V reference internally trimmed and the FB pin internally connected. External resistors are unnecessary and must not be added, as they would disrupt regulation. This simplifies layout and reduces BOM cost compared to adjustable versions like NCP1522BST1G.
Can the NCP1522BSNT1G operate with input voltage equal to its output voltage?
Yes, the NCP1522BSNT1G supports 100% duty cycle operation, allowing it to maintain regulation with input voltage as low as VOUT + 100 mV (i.e., down to ~1.9 V for the 1.8 V output). This feature ensures uninterrupted operation during battery discharge, especially critical in coin-cell or Li-ion applications where voltage drops below 2.0 V near end-of-life.
What is the purpose of the thermal pad on the bottom of the NCP1522BSNT1G package?
The exposed thermal pad on the NCP1522BSNT1G's SOT-23-6 package must be soldered to a dedicated PCB copper pour to conduct heat away from the die. It reduces thermal resistance (θJA) from 220°C/W (no pad) to 120°C/W (with 100 mm² 2-oz copper), enabling reliable 600 mA operation at elevated ambient temperatures. Omitting thermal pad connection risks thermal shutdown or premature failure.
Is the NCP1522BSNT1G compliant with AEC-Q200 for automotive use?
The NCP1522BSNT1G is not AEC-Q200 qualified. It is specified for industrial and consumer applications with operating junction temperature from –40°C to +125°C. For automotive cabin modules requiring AEC-Q200, consider onsemi's pin-compatible AEC-Q200 qualified variant NCP1522BMX18T1G (same electrical specs, qualified per stress test requirements).
NCP1522BSNT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 600mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP1522BSNT1G FAQ
1.How can I place an order for NCP1522BSNT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1522BSNT1G 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 NCP1522BSNT1G reliable?
The price and inventory of NCP1522BSNT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1522BSNT1G is usually 5 days.
3.What payment methods are accepted for NCP1522BSNT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1522BSNT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1522BSNT1G?
NCP1522BSNT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1522BSNT1G 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 NCP1522BSNT1G?
For technical support, including NCP1522BSNT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1522BSNT1G requirements.
6.How does Aetrix verify that NCP1522BSNT1G is sourced from the original manufacturer or authorized distributors?
All NCP1522BSNT1G 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 NCP1522BSNT1G meets industry standards.
7.What is the process for return or replacement of NCP1522BSNT1G?
All NCP1522BSNT1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1522BSNT1G, 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 NCP1522BSNT1G part is unused and in its original packaging.
Return procedure for NCP1522BSNT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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