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onsemi NCP1402SN30T1
- Part No.:
- NCP1402SN30T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1402SN30T1.pdf
- Description:
- IC REG BOOST 3V 130MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,459
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Product details
Overview
NCP1402SN30T1 from onsemi is a monolithic micropower PFM step-up DC-DC converter optimized for single- or dual-cell battery-powered portable equipment. It starts up at 0.8 V, operates down to 0.3 V, delivers up to 200 mA output current at 3.0 V with 85% efficiency (Vin = 2.0 V), and features integrated power MOSFET, soft-start, and chip enable control - used in handheld instruments and digital cameras.
For engineers reviewing the NCP1402SN30T1 datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (0.8 V), regulated 3.0 V ±2.5% output, ultra-low operating current (42 µA), ripple performance (typ. 30 mV), and Thin SOT-23-5 package compatibility with minimal external components.
Technical Context
The NCP1402SN30T1 implements pulse frequency modulation (PFM) with variable switching frequency, enabling high efficiency across light-to-moderate loads while maintaining stable regulation under low input voltages. Its internal architecture includes a PFM oscillator, PFM comparator, soft-start circuit, voltage reference, feedback resistors, driver, and N-channel power MOSFET with cycle-by-cycle current limiting.
It operates in continuous conduction mode with a maximum duty cycle of 78%, switch-on time of 5.5 µs (typ.), and minimum off-time of 1.45 µs (typ.). The device uses an internal VLX limiter to protect the power switch, with a typical current limit threshold of 190 mA and on-state sink current of 190 mA at VLX = 0.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±2.5% - factory-trimmed internal feedback network eliminates need for external resistors |
| Startup Voltage | 0.8 V (typ.) - enables operation from nearly-dead alkaline or NiMH cells |
| Operating Current | 42 µA (typ., VOUT = 3.0 V × 0.96) - ultra-low quiescent current extends battery life in standby |
| Ripple Voltage | 30 mV (typ., IO = 70 mA) - low noise output suitable for analog and RF-sensitive circuits |
| Efficiency | 85% (Vin = 2.0 V, VOUT = 3.0 V, IO = 70 mA) - high conversion efficiency preserves energy in space-constrained designs |
| LX Pin Current | 190 mA (typ., VLX = 0.4 V) - supports up to 200 mA load with margin for transient peaks |
| Package | Thin SOT-23-5 - compact 2.9 mm × 1.6 mm footprint ideal for portable PCB layouts |
Pinout & Package
Package: Thin SOT-23-5 (Case 483), Pb-free, RoHS compliant, thermal resistance RJA = 250 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Active-high logic control: ≥0.9 V enables regulator; <0.3 V disables (0.6 µA off-state current); floating defaults to enabled |
| 2 - OUT | Regulated output / power supply pin | Provides 3.0 V output and powers internal circuitry; also serves as reference for CE pull-up via internal 10 MΩ resistor |
| 3 - NC | No internal connection | Unbonded pin - must be left unconnected; no electrical function or thermal path |
| 4 - GND | Ground reference | Common return for input, output, and internal circuitry; requires low-impedance one-point grounding per layout guidelines |
| 5 - LX | Switch node / inductor connection | Drain of internal N-MOSFET; connects to external inductor; handles peak currents up to 190 mA and voltage swings up to 6.0 V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables use with deeply discharged batteries - critical for long-life portable instrumentation |
| Integrated power switch | On-chip N-channel MOSFET eliminates external transistor, reducing BOM count and PCB area |
| Soft-start circuit | 2.0 ms (typ.) controlled ramp prevents inrush current and stabilizes startup under heavy loads |
| Chip enable with hysteresis | 0.3 V to 0.9 V undefined range prevents erratic toggling; ensures clean on/off transitions in noisy environments |
| Low ripple & high accuracy | ±2.5% output tolerance and typ. 30 mV ripple support precision analog rails and noise-sensitive sensors |
Applications
| Handheld Test Instruments | Digital Cameras |
|---|---|
Use Scenario: Powering CMOS image sensor bias and analog front-end from single AA/AAA cell. IC Role / Device Role / Timing Role: Step-up regulator generating stable 3.0 V rail from 0.9–1.5 V input during burst capture mode. Use Value: Enables full-resolution imaging even as battery voltage drops below 1.0 V, extending usable runtime by >35%. |
Use Scenario: Supplying LCD backlight driver IC and memory interface from two NiMH cells. IC Role / Device Role / Timing Role: Primary 3.0 V power source for display controller and SD card interface during video recording. Use Value: Maintains 3.0 V regulation with <30 mV ripple, preventing display flicker and SD write errors under dynamic load. |
| Portable Audio Players | Medical Glucose Monitors |
Use Scenario: Generating clean 3.0 V supply for DAC, headphone amplifier, and flash memory in MP3 players. IC Role / Device Role / Timing Role: Low-noise boost converter powering audio signal chain with minimal EMI coupling. Use Value: 85% efficiency at 70 mA and 30 mV ripple reduce thermal rise and preserve SNR in audio output stage. |
Use Scenario: Providing regulated 3.0 V for electrochemical sensor interface and Bluetooth LE transceiver in disposable glucose meters. IC Role / Device Role / Timing Role: Micropower voltage booster enabling single-cell CR2032 operation over full shelf life. Use Value: 42 µA operating current and 0.6 µA shutdown current extend battery life to >2 years in intermittent-use devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610992DRVR | Higher 300 mA output capability; fixed 3.3 V output; requires external compensation; 1.2 µA shutdown current | Better suited for higher-current loads but lacks 3.0 V option and requires more design effort for stability | Select if >200 mA load or lower shutdown current is required; verify loop stability with external components |
| MAX17222ETA+T | 3.0 V output variant available; 500 nA shutdown current; smaller 2 mm × 2 mm 6-pin WLP package; no CE pin hysteresis spec | Superior for ultra-low-power wearables but lacks validated hysteresis guidance for noisy CE control lines | Prefer for space-constrained, always-off applications; confirm CE drive robustness in target system environment |
Compared with TPS610992DRVR and MAX17222ETA+T, the NCP1402SN30T1 offers optimal balance of 3.0 V accuracy, proven CE hysteresis behavior, and minimal external component count - making it ideal for cost-sensitive, battery-life-critical portable designs where layout simplicity is prioritized.
Availability
NCP1402SN30T1 is available at Aetrix Electronics and suitable for handheld instruments, digital cameras, and portable audio players requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for NCP1402SN30T1 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 NCP1402 series belongs to onsemi's micropower DC-DC converter product line, designed specifically for ultra-low-voltage battery-powered portable electronics where startup reliability and extended runtime are critical.
FAQ
What is the minimum input voltage required for the NCP1402SN30T1 to start up?
The NCP1402SN30T1 has a typical minimum startup voltage of 0.8 V, with a maximum of 0.95 V across temperature. This allows reliable startup from nearly depleted alkaline, NiMH, or lithium primary cells. The device continues operating down to 0.3 V, enabling deep discharge utilization in battery-powered systems.
Does the NCP1402SN30T1 require external feedback resistors to set its 3.0 V output?
No, the NCP1402SN30T1 does not require external feedback resistors. Its 3.0 V output is set by an internal trimmed resistor network, achieving ±2.5% accuracy over temperature and line/load conditions. This simplifies design and reduces bill-of-materials count compared to adjustable boost converters.
How does the CE pin on the NCP1402SN30T1 behave when left unconnected?
When the CE pin of the NCP1402SN30T1 is left floating, it is pulled up internally to the OUT pin via a 10 MΩ resistor, resulting in automatic enablement. The device enters normal operation without requiring external pull-up - a key feature for simplified "always-on" portable applications.
What is the typical output ripple voltage of the NCP1402SN30T1 under load?
The NCP1402SN30T1 delivers typical output ripple voltage of 30 mV at 70 mA load with standard 47 µH inductor and 68 µF output capacitor. Ripple remains below 60 mV across full 200 mA load range, supporting noise-sensitive analog and mixed-signal circuits without additional filtering.
Can the NCP1402SN30T1 operate with only three external components?
Yes, the NCP1402SN30T1 requires only three external components for basic operation: an inductor (typically 47 µH), a Schottky diode (e.g., MBR0520LT1), and an output capacitor (e.g., 68 µF low-ESR tantalum). Input capacitor is recommended but not strictly required for minimal configurations.
NCP1402SN30T1 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-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 3V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 130mA (Switch)
- Frequency - Switching:
- Up to 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP1402SN30T1 FAQ
1.How can I place an order for NCP1402SN30T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1402SN30T1 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 NCP1402SN30T1 reliable?
The price and inventory of NCP1402SN30T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1402SN30T1 is usually 5 days.
3.What payment methods are accepted for NCP1402SN30T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1402SN30T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1402SN30T1?
NCP1402SN30T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1402SN30T1 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 NCP1402SN30T1?
For technical support, including NCP1402SN30T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1402SN30T1 requirements.
6.How does Aetrix verify that NCP1402SN30T1 is sourced from the original manufacturer or authorized distributors?
All NCP1402SN30T1 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 NCP1402SN30T1 meets industry standards.
7.What is the process for return or replacement of NCP1402SN30T1?
All NCP1402SN30T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1402SN30T1, 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 NCP1402SN30T1 part is unused and in its original packaging.
Return procedure for NCP1402SN30T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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