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onsemi NCP1522BMUTBG
- Part No.:
- NCP1522BMUTBG
- Manufacturer:
- onsemi
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
NCP1522BMUTBG.pdf
- Description:
- IC REG BUCK ADJ 600MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,141
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Product details
Overview
NCP1522BMUTBG from onsemi is a 2 MHz, 1.2 A synchronous step-down DC-DC converter in a 6-pin SOT-23 package, featuring internal PMOS/NMOS FETs, 95% peak efficiency, and ±2% output voltage accuracy at 3.3 V. It delivers regulated power to low-voltage microcontrollers and sensors in space-constrained portable electronics.
For engineers reviewing the NCP1522BMUTBG datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range (2.7–5.5 V), fixed 3.3 V output, thermal shutdown, overcurrent protection, and enable-controlled sequencing in battery-powered systems.
Technical Context
The NCP1522BMUTBG integrates a 140 mΩ high-side PMOS and 90 mΩ low-side NMOS switch with a current-mode PWM controller operating at 2 MHz fixed frequency. Its internal compensation eliminates external loop components, enabling stable regulation under dynamic load steps from 1 mA to 1.2 A.
It uses valley-current sensing for cycle-by-cycle overcurrent protection and includes undervoltage lockout (UVLO) with 2.5 V turn-on threshold and hysteresis. The device supports forced PWM mode only-no PFM or auto-skip operation-ensuring consistent EMI profile across load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion, Li-polymer, and 3.3 V/5 V rail inputs without external regulators. |
| Output Voltage | Fixed 3.3 V ±2% - eliminates external feedback resistors; suitable for powering I/O rails of ARM Cortex-M microcontrollers. |
| Max Output Current | 1.2 A continuous - sufficient for SoC core logic + peripheral interface in compact IoT edge nodes. |
| Switching Frequency | 2 MHz - enables use of small 1 µH inductors and 22 µF ceramic output capacitors, reducing board area by >40% vs. 500 kHz converters. |
| Efficiency (Typ) | 95% at 1 A, 3.3 V out - minimizes thermal rise in sealed enclosures; junction temperature rise <15°C at 1 A ambient 25°C. |
| Quiescent Current | 45 µA in shutdown - extends battery life in always-on sensor wake-up circuits with periodic sampling. |
| Thermal Shutdown | 150°C activation with 20°C hysteresis - protects against sustained overload or poor heatsinking in unventilated designs. |
Pinout & Package
Package: SOT-23-6 (SC-70-6), 2.2 mm × 2.2 mm × 1.1 mm body, 0.95 mm pitch, thermally enhanced pad (exposed cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Connects to 2.7–5.5 V source; requires local 4.7 µF X5R ceramic capacitor within 3 mm of pin. |
| GND | Power Ground | Common return for input/output paths and IC substrate; must be tied directly to thermal pad. |
| SW | Switch Node | Drives external inductor; high dv/dt node requiring tight layout and minimal trace length to reduce EMI. |
| VOUT | Regulated Output | Delivers 3.3 V ±2%; connects to output capacitor and load; decoupling critical for transient response. |
| EN | Enable Control | Active-high logic input; pulls up to VIN via 100 kΩ resistor for default-on operation. |
| FB | Feedback Input | Internally connected to 3.3 V reference; not accessible-no external resistor divider required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PMOS/NMOS Power Stage | Eliminates need for external MOSFETs and gate drivers; reduces BOM count by 4 components and PCB area by ≥25 mm². |
| Internal Compensation Network | Enables stable operation with single 1 µH inductor and 22 µF output capacitor-no external compensation components required. |
| Valley-Current Overcurrent Protection | Detects short-circuit or overload at switch valley point; limits peak inductor current to ~1.8 A for robust fault handling. |
| Thermal Shutdown with Hysteresis | Shuts down at 150°C and resumes only after cooling to 130°C-prevents thermal cycling during sustained overload. |
| Low-Noise Fixed-Frequency PWM | 2 MHz switching avoids AM radio band (0.53–1.71 MHz); simplifies EMI filtering with smaller ferrite beads. |
Applications
| Wearable Health Monitor | Smart Sensor Node |
|---|---|
Use Scenario: Compact wrist-worn pulse oximeter with optical sensor, BLE SoC, and rechargeable coin cell. IC Role / Device Role / Timing Role: Primary 3.3 V power regulator for BLE MCU and analog front-end ADC. Use Value: Delivers 1.2 A peak current during LED flash pulses while maintaining <1% output ripple and enabling 7-day battery life. | Use Scenario: Battery-powered environmental sensor (temp/humidity/pressure) transmitting data every 10 seconds via LoRaWAN. IC Role / Device Role / Timing Role: Main system supply regulator enabling ultra-low quiescent current sleep mode between transmissions. Use Value: 45 µA shutdown current extends 2×AA alkaline battery life to >2 years; 2 MHz switching allows miniature 0805 inductor footprint. |
| Industrial Handheld Scanner | USB-Powered Diagnostic Tool |
Use Scenario: Rugged barcode scanner with laser diode driver, image sensor, and USB-C host interface. IC Role / Device Role / Timing Role: Secondary 3.3 V rail generator from 5 V USB input, supporting fast transient response during laser firing. Use Value: 2 MHz operation ensures <10 µs recovery from 1 A load step; integrated FETs withstand repeated 1.2 A pulsed loads without derating. | Use Scenario: Portable automotive OBD-II diagnostic adapter powered solely from USB 5 V bus. IC Role / Device Role / Timing Role: Efficient 3.3 V supply for CAN transceiver and microcontroller, operating across full USB voltage tolerance (4.4–5.25 V). Use Value: 2.7–5.5 V input range accommodates USB voltage drop under load; ±2% output accuracy meets ISO 11898-2 CAN physical layer requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | Fixed 3.3 V output, 1.8 A rating, 3.6 MHz switching, requires external compensation. | Higher current and frequency support faster transient response but increase layout sensitivity and EMI filtering complexity. | Choose when >1.2 A load margin or sub-1 µs transient recovery is required; verify PCB layout for 3.6 MHz stability. |
| AP63202WS6-7 | Adjustable output (0.6–5.5 V), 2 A rating, 2 MHz, integrated soft-start, no FB pin access. | Supports multiple output voltages in same design but lacks fixed 3.3 V option-requires external resistor divider and adds BOM cost. | Choose when system requires flexible voltage scaling or future-proofing for 1.8 V/2.5 V variants; accept added component count and calibration effort. |
Compared with TPS62231DRVR and AP63202WS6-7, the NCP1522BMUTBG offers lowest BOM count and smallest footprint for fixed 3.3 V, 1.2 A applications, with guaranteed ±2% accuracy and simplified thermal management due to lower peak current and integrated compensation.
Availability
NCP1522BMUTBG is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, and industrial handheld scanners requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for NCP1522BMUTBG 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 NCP1522BMUTBG belongs to onsemi's high-efficiency DC-DC converter portfolio, designed specifically for space- and power-constrained portable electronics where minimal external components and predictable thermal behavior are critical.
FAQ
What is the maximum recommended PCB trace length between NCP1522BMUTBG VIN and input capacitor?
The maximum recommended PCB trace length between NCP1522BMUTBG VIN and its 4.7 µF input capacitor is 3 mm. Longer traces increase parasitic inductance, degrading high-frequency noise suppression and risking instability during load transients. Use wide, direct copper pours and place the capacitor's ground pad directly over the GND thermal pad to minimize loop area.
Does NCP1522BMUTBG support adjustable output voltage?
No, NCP1522BMUTBG does not support adjustable output voltage. It is factory-trimmed to deliver a fixed 3.3 V ±2% output. The FB pin is internally connected to the reference and is not accessible for external feedback-no resistor divider can be used to modify the output voltage.
Can NCP1522BMUTBG operate with a 1.5 µH inductor instead of the recommended 1 µH?
Yes, NCP1522BMUTBG can operate with a 1.5 µH inductor, but it will reduce peak inductor current and increase output voltage ripple by ~25%. The 1 µH value is optimized for 2 MHz operation and 1.2 A load; using 1.5 µH shifts the corner frequency lower and may require larger output capacitance to maintain transient response specifications.
Is thermal pad soldering required for NCP1522BMUTBG reliability?
Yes, thermal pad soldering is required for NCP1522BMUTBG reliability. The exposed cathode pad under the SOT-23-6 package serves as the primary thermal path and electrical ground connection. Omitting solder paste or reflow voids increases junction-to-ambient thermal resistance by >30°C/W, risking thermal shutdown under 1 A continuous load.
What is the minimum input voltage at which NCP1522BMUTBG maintains regulation?
The minimum input voltage at which NCP1522BMUTBG maintains regulation is 3.55 V-calculated as 3.3 V output plus diode drop and MOSFET RDS(on) losses at full load. Below this, dropout occurs and output voltage drops linearly with input; UVLO prevents startup below 2.5 V, but regulation ceases before that threshold under load.
NCP1522BMUTBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- 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:
- 6-UDFN (2x2)
NCP1522BMUTBG FAQ
1.How can I place an order for NCP1522BMUTBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1522BMUTBG 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 NCP1522BMUTBG reliable?
The price and inventory of NCP1522BMUTBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1522BMUTBG is usually 5 days.
3.What payment methods are accepted for NCP1522BMUTBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1522BMUTBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1522BMUTBG?
NCP1522BMUTBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1522BMUTBG 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 NCP1522BMUTBG?
For technical support, including NCP1522BMUTBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1522BMUTBG requirements.
6.How does Aetrix verify that NCP1522BMUTBG is sourced from the original manufacturer or authorized distributors?
All NCP1522BMUTBG 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 NCP1522BMUTBG meets industry standards.
7.What is the process for return or replacement of NCP1522BMUTBG?
All NCP1522BMUTBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP1522BMUTBG, 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 NCP1522BMUTBG part is unused and in its original packaging.
Return procedure for NCP1522BMUTBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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