My Inquiry
My Account
onsemi NCP1402SN40T1
- Part No.:
- NCP1402SN40T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1402SN40T1.pdf
- Description:
- IC REG BOOST 4V 130MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,928
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP1402SN40T1 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 current at 4.0 V (Vin = 2.0 V), achieves 85% efficiency, and integrates power MOSFET, soft-start, voltage reference, and feedback resistors - used in MP3 players, digital cameras, and handheld instruments.
For engineers reviewing the NCP1402SN40T1 datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (0.8 V), regulated output (4.0 V ±2.5%), CE-controlled shutdown (<0.3 V disable), LX pin current limit (130 mA typ), and Thin SOT-23-5 package compatibility with minimal external components.
Technical Context
The NCP1402SN40T1 implements pulse frequency modulation (PFM) control with an internal oscillator, PFM comparator, and cycle-by-cycle current limiting. Its soft-start circuit ramps output to ~1.5 V before normal regulation begins, improving startup under heavy load.
Regulation is achieved via an internal trimmed resistor divider setting VOUT = 4.0 V (±2.5%), referenced to a stable on-chip voltage reference. The CE pin enables/disables operation using a defined hysteresis window (enable ≥0.9 V, disable ≤0.3 V), with internal 10 MΩ pullup to OUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.0 V ±2.5% - factory-trimmed internal feedback network eliminates external resistor selection. |
| Startup Voltage | 0.8 V typ - enables operation from single alkaline or NiMH cell at end-of-life. |
| Hold Voltage | 0.3 V min - sustains regulation below typical battery cutoff, extending usable runtime. |
| Efficiency | 85% @ Vin = 2.0 V, VOUT = 4.0 V, IO = 70 mA - minimizes power loss in space-constrained portable designs. |
| LX Pin Current Limit | 130 mA typ - protects integrated N-channel FET and prevents inductor saturation during transients. |
| Operating Current | 55 µA typ @ VOUT = 4.0 V × 0.96 - ultra-low quiescent current preserves battery life in standby. |
| Shutdown Current | 0.6 µA typ @ VCE = 0 V - near-zero leakage when disabled via CE pin. |
| Output Ripple | Typ. 30 mV - low noise performance suitable for analog and RF subsystems. |
Pinout & Package
Package: Thin SOT-23-5 (Case 483), Pb-free, RoHS compliant, 1.6 mm × 2.9 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Logic-level control: ≥0.9 V enables regulation; ≤0.3 V disables IC (0.6 µA shutdown current); floating defaults to enabled via internal 10 MΩ pullup to OUT. |
| 2 - OUT | Regulated output & supply rail | Provides 4.0 V output and powers internal circuitry; also serves as reference for CE pullup. |
| 3 - NC | No internal connection | Unbonded pin - must be left unconnected; no routing or grounding required. |
| 4 - GND | Power ground reference | Common return for input, output, and internal circuits; requires low-impedance one-point grounding per layout guidelines. |
| 5 - LX | Switch node / inductor interface | Drain of internal N-channel MOSFET; connects to external inductor and Schottky diode anode; rated for 6.0 V peak and 130 mA continuous sink. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables use with single-cell batteries at deep discharge, avoiding premature system shutdown. |
| Integrated feedback network | Factory-trimmed for 4.0 V output eliminates external resistors, reducing BOM count and layout area. |
| PFM control architecture | Variable-frequency operation maintains high efficiency across wide load range (1–200 mA) without external compensation. |
| Soft-start circuit | Ramps output to ~1.5 V before regulation engages, preventing inrush current and improving startup reliability under load. |
| CE-controlled shutdown | Reduces total system current to 0.6 µA, enabling long-term battery storage or host-controlled power gating. |
| Thin SOT-23-5 package | 1.6 mm × 2.9 mm footprint supports ultra-compact PCB layouts in wearables and miniature IoT devices. |
Applications
| Portable Audio Devices | Digital Imaging Systems |
|---|---|
Use Scenario: Powering audio codec and flash memory in MP3 players powered by single AA/AAA alkaline cells. IC Role / Device Role / Timing Role: Step-up regulator generating stable 4.0 V rail from decaying 0.8–1.5 V battery input. Use Value: Extends playback time by operating down to 0.3 V battery voltage and maintaining 85% efficiency at medium loads. | Use Scenario: Supplying image sensor and LCD backlight driver in compact digital cameras with dual NiMH cells. IC Role / Device Role / Timing Role: Primary 4.0 V power source enabling high-current burst mode during capture. Use Value: Delivers 200 mA peak current with <30 mV ripple, ensuring clean power for noise-sensitive imaging circuits. |
| Handheld Test Instruments | Low-Power Wireless Sensors |
Use Scenario: Providing regulated 4.0 V for microcontroller, ADC, and display in pocket-sized multimeters. IC Role / Device Role / Timing Role: Main DC-DC converter supporting intermittent high-current measurement cycles. Use Value: CE pin allows host MCU to disable regulator between readings, reducing average current to sub-µA levels. | Use Scenario: Powering BLE SoC and environmental sensors in battery-operated industrial monitors. IC Role / Device Role / Timing Role: Always-on boost stage maintaining 4.0 V during sleep and enabling fast wake-up from 0.8 V cold start. Use Value: 0.8 V startup and 55 µA operating current maximize multi-year battery life in maintenance-free deployments. |
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 600 mA output capability; requires external feedback for 4.0 V. | Better suited for higher-current 3.3 V systems; lacks 0.8 V startup and 0.3 V hold capability. | Select if 3.3 V rail is acceptable and >200 mA peak load is required; verify startup behavior with aging batteries. |
| MAX17222ETA+T | 4.0 V output option available; 0.7 V startup; 300 mA output; uses different PFM control scheme. | Superior cold-start performance but larger 2 mm × 2 mm TDFN package; higher quiescent current (1.5 µA). | Choose when lowest possible startup voltage is critical and board space permits larger footprint; confirm ripple requirements. |
Compared with TPS61200DRCT and MAX17222ETA+T, the NCP1402SN40T1 uniquely balances ultra-low-voltage operation (0.8 V start / 0.3 V hold), precise 4.0 V output, and minimal 1.6 mm × 2.9 mm footprint - making it optimal for space- and battery-life-constrained single-cell portable designs where 200 mA peak suffices.
Availability
NCP1402SN40T1 is available at Aetrix Electronics and suitable for portable audio, digital imaging, handheld instrumentation, and low-power wireless sensor applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP1402SN40T1 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, high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP1402 series belongs to onsemi's micropower DC-DC converter product line, engineered specifically for ultra-low-voltage battery-powered portable electronics where extended runtime and minimal external components are critical design requirements.
FAQ
What is the minimum input voltage required for the NCP1402SN40T1 to begin regulation?
The NCP1402SN40T1 has a typical minimum startup voltage of 0.8 V and can sustain regulation down to 0.3 V. This allows reliable operation from single-cell alkaline, NiMH, or Li-ion batteries even at deep discharge states. Startup voltage is temperature-dependent, with a coefficient of −1.6 mV/°C over −40°C to +85°C.
How does the CE pin function on the NCP1402SN40T1?
The CE pin on the NCP1402SN40T1 controls device enable/disable state: applying ≥0.9 V enables regulation, ≤0.3 V disables it (reducing current to 0.6 µA), and floating defaults to enabled via an internal 10 MΩ pullup to the OUT pin. Voltages between 0.3 V and 0.9 V must be avoided due to undefined hysteresis behavior.
What output capacitor value is recommended for stable operation of the NCP1402SN40T1?
A 47 µF to 68 µF low-ESR tantalum capacitor (e.g., KEMET T494D686K010AS) is recommended for the NCP1402SN40T1 output. Ceramic alternatives include two parallel 22 µF low-profile SMD units. ESR should be 0.15–0.30 Ω to maintain <30 mV ripple and ensure stability under dynamic load conditions.
Can the NCP1402SN40T1 drive a 200 mA load continuously?
Yes - the NCP1402SN40T1 is rated for up to 200 mA output current at VOUT = 4.0 V and Vin = 2.0 V, with 85% efficiency. Performance depends on external component selection: a 47 µH inductor (e.g., Sumida CD54-470L), low-VF Schottky diode (e.g., MBR0520LT1), and proper PCB layout are essential to sustain full-load operation without thermal derating.
Is the NCP1402SN40T1 RoHS compliant and lead-free?
Yes, the NCP1402SN40T1 is Pb-free and RoHS compliant, packaged in a Thin SOT-23-5 (Case 483) with matte tin lead finish. It meets JEDEC J-STD-020A moisture sensitivity level MSL 1 and is qualified for industrial temperature range (−40°C to +85°C ambient).
NCP1402SN40T1 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):
- 4V
- Voltage - Output (Min/Fixed):
- 4V
- 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
NCP1402SN40T1 FAQ
1.How can I place an order for NCP1402SN40T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1402SN40T1 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 NCP1402SN40T1 reliable?
The price and inventory of NCP1402SN40T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1402SN40T1 is usually 5 days.
3.What payment methods are accepted for NCP1402SN40T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1402SN40T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1402SN40T1?
NCP1402SN40T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1402SN40T1 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 NCP1402SN40T1?
For technical support, including NCP1402SN40T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1402SN40T1 requirements.
6.How does Aetrix verify that NCP1402SN40T1 is sourced from the original manufacturer or authorized distributors?
All NCP1402SN40T1 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 NCP1402SN40T1 meets industry standards.
7.What is the process for return or replacement of NCP1402SN40T1?
All NCP1402SN40T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1402SN40T1, 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 NCP1402SN40T1 part is unused and in its original packaging.
Return procedure for NCP1402SN40T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP1402SN40T1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
