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onsemi NCP1402SN30T1G
- Part No.:
- NCP1402SN30T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1402SN30T1G.pdf
- Description:
- IC REG BOOST 3V 130MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,872
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Product details
Overview
NCP1402SN30T1G from onsemi is a monolithic micropower PFM step-up DC-DC switching regulator designed for ultra-low-voltage battery-powered portable systems. It starts up at 0.8 V, operates down to 0.3 V, delivers up to 200 mA output at 3.0 V from 2.0 V input, and achieves 85% efficiency with only three external components. It powers compact devices such as digital cameras and handheld instruments where extended battery life and minimal footprint are critical.
For engineers reviewing the NCP1402SN30T1G datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (0.8 V), regulated 3.0 V ±2.5% output, chip enable control, thin SOT-23-5 package constraints, and PFM-based low-noise operation in continuous conduction mode.
Technical Context
The NCP1402SN30T1G implements a voltage-mode PFM control architecture with integrated soft-start, on-chip feedback resistors, and cycle-by-cycle current limiting. Its oscillator sets variable on-time (5.5 µs typ.) and minimum off-time (1.45 µs typ.), enabling efficient light-load operation without external frequency programming.
It integrates a 3.0 V fixed-output reference trimmed into the die, an internal N-channel power MOSFET with 350 mA current limit, and a VLX limiter that clamps LX voltage to 0.9 V (typ.). The CE pin uses an internal 10 MΩ pullup to OUT, supporting simple enable/disable control with defined high (>0.9 V) and low (<0.3 V) thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±2.5% - factory-trimmed internal feedback network eliminates external resistor divider; enables single-supply 3.0 V rail generation from sub-1 V batteries. |
| Startup Voltage | 0.8 V (typ.) - allows operation from nearly-dead alkaline or NiMH cells; supports single-cell 0.8–3.0 V input range without pre-bias. |
| Operating Current | 42 µA (typ., VOUT = 3.0 V × 0.96) - ultra-low quiescent current extends battery runtime in always-on sensor nodes and standby modes. |
| Efficiency | 85% (Vin = 2.0 V, VOUT = 3.0 V, IO = 70 mA) - high conversion efficiency minimizes thermal rise in sealed enclosures and preserves battery capacity. |
| Max Output Current | 200 mA (Vin = 2.0 V) - sufficient to drive multiple low-power ICs (e.g., microcontrollers, sensors, OLED displays) from a single boost stage. |
| Ripple Voltage | 30 mV (typ.) - low output ripple reduces need for additional LC filtering; compatible with noise-sensitive analog circuits and RF modules. |
| Package | Thin SOT-23-5 (TSOP-5) - 2.9 mm × 1.6 mm × 1.1 mm footprint enables space-constrained PCB layouts in wearables and medical patches. |
Pinout & Package
Package: Thin SOT-23-5 (Case 483), Pb-free, RoHS compliant, 2.9 mm × 1.6 mm × 1.1 mm body height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Active-high logic control: ≥0.9 V enables regulation; ≤0.3 V disables (0.6 µA shutdown current); floating defaults to enabled via internal 10 MΩ pullup to OUT. |
| 2 - OUT | Regulated output & supply pin | Provides 3.0 V output; supplies internal circuitry; serves as reference for CE pullup; requires external output capacitor (47–68 µF low-ESR). |
| 3 - NC | No internal connection | Unbonded pad; must be left unconnected or tied to GND per layout best practice; no electrical function or signal routing. |
| 4 - GND | Power ground reference | Primary return path for switch current and feedback; requires low-impedance one-point grounding with C1/C2 and LX trace to minimize noise coupling. |
| 5 - LX | Switch node connection | Drain of internal N-MOSFET; connects to inductor and Schottky diode anode; carries high di/dt switching current; requires short, wide copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables direct use with single alkaline/NiMH cells at end-of-life, eliminating need for auxiliary charge pumps or LDO pre-regulators. |
| Integrated feedback network | Factory-trimmed 3.0 V output eliminates external resistor divider, reducing BOM count, layout area, and calibration drift over temperature. |
| PFM modulation | Variable-frequency operation maintains high efficiency across 10 µA–200 mA load range without requiring external compensation or clock synchronization. |
| Soft-start circuit | 2.0 ms (typ.) controlled ramp prevents inrush current and output overshoot during power-up, protecting downstream capacitors and ICs. |
| Current-limit protection | 350 mA cycle-by-cycle limiting prevents inductor saturation and MOSFET overstress under short-circuit or heavy transient loads. |
Applications
| Digital Camera Power Supply | Handheld Medical Instrument |
|---|---|
|
Use Scenario: Powers image sensor, flash LED driver, and microcontroller from a single AA/AAA cell in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Primary 3.0 V system rail generator; replaces discrete boost + LDO solutions; provides stable voltage during burst capture and flash discharge. Use Value: Enables >200 shots per battery by minimizing quiescent current (42 µA) and maintaining >80% efficiency at 50 mA load, extending operational time between replacements. |
Use Scenario: Supplies 3.0 V to low-power ADC, Bluetooth LE transceiver, and display controller in portable blood glucose meters and pulse oximeters. IC Role / Device Role / Timing Role: Micropower boost converter with CE-controlled shutdown; synchronizes with measurement cycles to reduce average system current. Use Value: Achieves 0.6 µA shutdown current when disabled, allowing multi-month shelf life and >1-year battery life in intermittent-use clinical devices. |
| Wireless Sensor Node | Portable Audio Decoder |
|
Use Scenario: Generates 3.0 V for ultra-low-power MCU, environmental sensor, and sub-GHz RF transceiver in battery-operated IoT endpoints. IC Role / Device Role / Timing Role: Always-on boost regulator with PFM modulation; dynamically adjusts switching frequency to match sensor sampling intervals and transmit bursts. Use Value: Delivers 85% efficiency at 100 µA load and 75% at 10 µA, enabling 5+ year battery life on CR2032 while meeting EN 300 220 emission limits. |
Use Scenario: Provides clean 3.0 V rail to MP3/WMA decoder IC and headphone amplifier in miniaturized portable audio players. IC Role / Device Role / Timing Role: Low-noise PFM boost stage; feeds low-ESR output capacitor to suppress switching artifacts in audio band (20 Hz–20 kHz). Use Value: 30 mV typical ripple and absence of fixed-frequency harmonics eliminate audible whine and preserve SNR >95 dB in Class D amplifier stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | Fixed 3.3 V output; higher 1.8 V min startup; 90% peak efficiency; requires external feedback for 3.0 V | Better suited for 3.3 V logic systems; less optimal for strict 3.0 V rails or sub-1 V battery start | Select if 3.3 V output is acceptable and higher efficiency at mid-load is prioritized over ultra-low startup voltage. |
| MAX1703EUT+T | 3.0 V output; 0.9 V startup; 250 mA max output; larger SOT23-6 package; no CE pin | Lacks enable control; occupies more board area; higher quiescent current (65 µA) | Choose when higher output current is required and board space permits larger footprint; avoid when CE-controlled sleep mode is mandatory. |
Compared with TPS61200DRCT and MAX1703EUT+T, the NCP1402SN30T1G uniquely combines 0.8 V startup, integrated 3.0 V regulation, CE shutdown, and thin SOT-23-5 packaging-making it optimal for space- and battery-limited 3.0 V systems where deep discharge utilization is essential.
Availability
NCP1402SN30T1G is available at Aetrix Electronics and suitable for portable medical devices, wireless sensor networks, digital imaging modules, and handheld consumer electronics requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCP1402SN30T1G 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 focused on energy-efficient innovation for automotive, industrial, cloud, and intelligent edge applications.
The NCP1402SN30T1G belongs to onsemi's micropower DC-DC converter product line, engineered specifically for ultra-low-voltage battery-powered portable equipment where extended runtime, minimal footprint, and reliable cold-start capability are critical design requirements.
FAQ
What is the minimum input voltage required for NCP1402SN30T1G to start regulating?
The NCP1402SN30T1G has a typical minimum startup voltage of 0.8 V, with a maximum of 0.95 V across temperature. This allows it to begin regulation from a single nearly-depleted alkaline or NiMH cell. Startup voltage is measured at zero load and decreases slightly with rising temperature (−1.6 mV/°C coefficient). Below 0.3 V, the device ceases regulation but remains functional once input recovers.
How does the CE pin function on the NCP1402SN30T1G?
The CE pin on the NCP1402SN30T1G enables or disables the regulator: ≥0.9 V enables normal operation; ≤0.3 V places the device in shutdown mode drawing only 0.6 µA. An internal 10 MΩ pullup resistor connects CE to the OUT pin, so leaving CE floating results in automatic enable. Voltages between 0.3 V and 0.9 V must be avoided due to undefined hysteresis behavior.
Can the NCP1402SN30T1G deliver 200 mA continuously at 3.0 V output?
Yes-the NCP1402SN30T1G supports up to 200 mA output current at 3.0 V when input voltage is ≥2.0 V, as confirmed in the datasheet's Figure 4 and Electrical Characteristics table. Performance depends on external components: a 47 µH inductor, low-ESR output capacitor (≥47 µF), and Schottky diode (e.g., MBR0520LT1) are recommended to sustain this current with <30 mV ripple and >80% efficiency.
What is the output voltage accuracy and temperature drift of the NCP1402SN30T1G?
The NCP1402SN30T1G provides a nominal 3.0 V output with ±2.5% initial accuracy over process and temperature. Its output voltage temperature coefficient is 150 ppm/°C, meaning output drift is approximately ±0.015 V over a −40°C to +85°C ambient range. This stability is verified in Figure 10 of the datasheet and ensures reliable operation in consumer and industrial environments.
Is the NCP1402SN30T1G RoHS compliant and lead-free?
Yes-the NCP1402SN30T1G is explicitly marked as Pb-free and RoHS compliant per the datasheet's Features section and ordering information. It meets EU Directive 2011/65/EU and is manufactured using lead-free soldering processes compatible with standard reflow profiles for SMT assembly.
NCP1402SN30T1G 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
NCP1402SN30T1G FAQ
1.How can I place an order for NCP1402SN30T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1402SN30T1G 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 NCP1402SN30T1G reliable?
The price and inventory of NCP1402SN30T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1402SN30T1G is usually 5 days.
3.What payment methods are accepted for NCP1402SN30T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1402SN30T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1402SN30T1G?
NCP1402SN30T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1402SN30T1G 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 NCP1402SN30T1G?
For technical support, including NCP1402SN30T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1402SN30T1G requirements.
6.How does Aetrix verify that NCP1402SN30T1G is sourced from the original manufacturer or authorized distributors?
All NCP1402SN30T1G 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 NCP1402SN30T1G meets industry standards.
7.What is the process for return or replacement of NCP1402SN30T1G?
All NCP1402SN30T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1402SN30T1G, 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 NCP1402SN30T1G part is unused and in its original packaging.
Return procedure for NCP1402SN30T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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