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onsemi NCP1402SN50T1G
- Part No.:
- NCP1402SN50T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1402SN50T1G.pdf
- Description:
- IC REG BOOST 5V 130MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
NCP1402SN50T1G from onsemi is a monolithic micropower step-up DC-DC switching regulator optimized for ultra-low-voltage battery-powered portable electronics. It starts up at 0.8 V, operates down to 0.3 V, delivers up to 200 mA output at 5.0 V with 85% efficiency (Vin = 2.0 V), and integrates PFM control, soft-start, current-limit protection, and chip enable functionality. It powers compact devices such as digital cameras and handheld instruments requiring stable 5 V from single-cell alkaline or NiMH sources.
For engineers reviewing the NCP1402SN50T1G datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (0.8 V), regulated 5.0 V ±2.5% output, SOT-23-5 package constraints, CE-controlled shutdown (<0.3 V disable threshold), and LX pin current capability (215 mA typical).
Technical Context
The NCP1402SN50T1G implements pulse frequency modulation (PFM) with variable switching frequency to maintain high efficiency across light-to-moderate loads. Its internal architecture includes an on-chip 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 85%, uses an internal 5.0 V feedback network (trimmed ±2.5%), and features a dedicated LX pin for external inductor connection and a CE pin with hysteresis-free enable/disable logic (0.9 V high threshold, 0.3 V low threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2.5% - factory-trimmed internal feedback enables fixed 5 V regulation without external resistors. |
| Startup Voltage | 0.8 V typ - allows operation from nearly depleted single-cell batteries (e.g., 0.8–1.5 V alkaline/NiMH). |
| Hold Voltage | 0.3 V min - sustains regulation until battery drops below 0.3 V, maximizing usable cell energy. |
| Max Output Current | 200 mA @ Vin = 2.0 V - supports moderate-power peripherals like CMOS image sensors or audio codecs. |
| Efficiency | 85% @ Vin = 2.0 V, VOUT = 5.0 V, IO = 70 mA - minimizes heat and extends battery life in space-constrained designs. |
| Operating Current | 70 µA typ @ VOUT = 5.0 V - ultra-low quiescent current preserves battery during standby. |
| Shutdown Current | 0.6 µA typ - achieved when CE < 0.3 V, enabling long-term storage or deep sleep modes. |
Pinout & Package
Package: Thin SOT-23-5 (TSOP-5, Case 483), Pb-free and RoHS compliant, footprint compatible with standard SOT-23-5 PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Logic-high (>0.9 V) enables regulation; logic-low (<0.3 V) disables IC, reducing current to 0.6 µA; floating defaults to enabled. |
| 2 - OUT | Regulated output & supply pin | Provides 5.0 V output; also supplies internal circuitry - must be decoupled with ≥10 µF capacitor. |
| 3 - NC | No internal connection | Not bonded; must remain unconnected - no routing or soldering required. |
| 4 - GND | Power ground reference | Common return for input, output, and internal circuits - requires low-impedance single-point grounding per layout guidelines. |
| 5 - LX | Switch node / inductor connection | Drain of internal N-MOSFET - connects directly to inductor; handles peak currents up to 215 mA and voltages to 6.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables use with deeply discharged primary cells, extending device runtime beyond conventional boost ICs. |
| Integrated PFM controller + power switch | Eliminates need for external MOSFET or control IC - only three external components (inductor, diode, output cap) required for full operation. |
| ±2.5% output voltage accuracy | Factory-trimmed internal feedback ensures stable 5.0 V without calibration or external resistor matching. |
| Soft-start circuit | Ramps output to ~1.5 V before normal regulation begins, preventing inrush current and improving startup under heavy load. |
| CE-controlled shutdown | Reduces total system current to sub-µA levels - critical for battery-backed real-time clocks or sensor wake-on-event architectures. |
Applications
| Digital Camera Power Supply | Handheld Instrument Core Rail |
|---|---|
Use Scenario: Powers CMOS image sensor, flash memory, and display backlight from a single AA/AAA alkaline cell. IC Role / Device Role / Timing Role: Primary 5.0 V step-up regulator supplying core logic and analog front-end circuitry. Use Value: Enables 5 V operation from 0.8–1.5 V input, supporting >1000 shots per battery while maintaining ±2.5% rail stability. | Use Scenario: Supplies microcontroller, ADC, and communication interface in portable multimeters or gas detectors. IC Role / Device Role / Timing Role: Main system power converter delivering regulated 5.0 V to mixed-signal subsystems. Use Value: Delivers 200 mA at 85% efficiency with 30 mV ripple, ensuring clean analog measurements and reliable UART/SPI timing. |
| Portable Audio Codec Bias | Low-Power MCU Wake-Up Supply |
Use Scenario: Generates clean 5.0 V bias for headphone amplifiers and DACs in MP3 players or Bluetooth earbuds. IC Role / Device Role / Timing Role: Dedicated audio rail generator with low noise and fast transient response. Use Value: Achieves <30 mV output ripple and <2 ms load-step recovery, minimizing audible artifacts during volume changes. | Use Scenario: Provides always-on 5.0 V supply to MCU reset supervisor and RTC while main system sleeps. IC Role / Device Role / Timing Role: Ultra-low-quiescent auxiliary regulator activated via CE pin during wake events. Use Value: Draws only 0.6 µA in shutdown and starts within 2 ms of CE assertion - enabling sub-second wake latency. |
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 | Higher 3.3 V fixed output; 0.3 V startup; 300 mA max output; requires external feedback resistors for 5 V. | Designed for Li-ion backup systems; lacks factory-trimmed 5 V option; higher quiescent current (55 µA vs. 70 µA). | Select if higher output current or Li-ion input compatibility is prioritized over single-cell alkaline optimization. |
| MAX1706ESA+ | Fixed 5.0 V output; 0.9 V startup; 150 mA max output; no CE pin; higher 100 µA operating current. | Targeted at older portable designs; lacks ultra-low-voltage start capability and shutdown control. | Select only for legacy replacement where CE control and sub-0.8 V startup are not required. |
Compared with TPS61200DRCT and MAX1706ESA+, the NCP1402SN50T1G uniquely combines factory-trimmed 5.0 V output, 0.8 V startup, CE shutdown, and 70 µA operating current - making it optimal for space- and battery-limited single-cell applications demanding precise 5 V regulation.
Availability
NCP1402SN50T1G is available at Aetrix Electronics and suitable for digital cameras, handheld instruments, portable audio systems, and low-power MCU subsystems requiring stable component supply with guaranteed long-term sourcing.
Supply support for NCP1402SN50T1G 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 IoT applications.
The NCP1402 series belongs to onsemi's micropower DC-DC converter product line, designed specifically for ultra-low-voltage battery-powered portable equipment requiring minimal bill-of-materials and extended runtime.
FAQ
What is the minimum input voltage required for NCP1402SN50T1G to start regulation?
The NCP1402SN50T1G 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 nearly exhausted single-cell alkaline or NiMH batteries. The device continues operating down to 0.3 V, extracting maximum usable energy from the cell before shutdown.
Does NCP1402SN50T1G require external feedback resistors to set its 5.0 V output?
No. The NCP1402SN50T1G integrates a factory-trimmed feedback resistor network configured for a nominal 5.0 V output with ±2.5% accuracy. No external resistors are needed - only an inductor, Schottky diode, and input/output capacitors are required to implement a complete step-up converter.
How does the CE pin function on NCP1402SN50T1G, and what voltage levels enable/disable it?
The CE pin on NCP1402SN50T1G enables or disables the regulator: applying ≥0.9 V enables normal operation; applying ≤0.3 V disables the IC, reducing quiescent current to 0.6 µA. Voltages between 0.3 V and 0.9 V must be avoided due to undefined behavior - the NCP1402SN50T1G datasheet explicitly warns against this hysteresis region.
What is the maximum output current capability of NCP1402SN50T1G at 5.0 V output?
The NCP1402SN50T1G delivers up to 200 mA of continuous output current when Vin = 2.0 V and VOUT = 5.0 V, as confirmed in the datasheet's electrical characteristics and Figure 5. Performance scales with input voltage - at Vin = 1.5 V, max output current drops to ~120 mA due to duty cycle and switch current limits.
Can NCP1402SN50T1G be used with ceramic output capacitors instead of tantalum?
Yes. While the datasheet recommends 47–68 µF low-ESR tantalum capacitors, two parallel 22 µF low-profile SMD ceramic capacitors are explicitly cited as an acceptable alternative for space-constrained designs. Ceramic caps must have ESR ≤0.3 Ω to maintain ripple performance and stability per the NCP1402SN50T1G application guidelines.
NCP1402SN50T1G 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):
- 5V
- Voltage - Output (Min/Fixed):
- 5V
- 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
NCP1402SN50T1G FAQ
1.How can I place an order for NCP1402SN50T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1402SN50T1G 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 NCP1402SN50T1G reliable?
The price and inventory of NCP1402SN50T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1402SN50T1G is usually 5 days.
3.What payment methods are accepted for NCP1402SN50T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1402SN50T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1402SN50T1G?
NCP1402SN50T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1402SN50T1G 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 NCP1402SN50T1G?
For technical support, including NCP1402SN50T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1402SN50T1G requirements.
6.How does Aetrix verify that NCP1402SN50T1G is sourced from the original manufacturer or authorized distributors?
All NCP1402SN50T1G 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 NCP1402SN50T1G meets industry standards.
7.What is the process for return or replacement of NCP1402SN50T1G?
All NCP1402SN50T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1402SN50T1G, 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 NCP1402SN50T1G part is unused and in its original packaging.
Return procedure for NCP1402SN50T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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