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onsemi NCP1406SNT1G
- Part No.:
- NCP1406SNT1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1406SNT1G.pdf
- Description:
- IC REG BOOST ADJ 25MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,158
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Product details
Overview
NCP1406SNT1G from onsemi is a monolithic PFM-controlled step-up DC-DC converter with integrated 0.8 A/26 V NMOS switch, operating from 1.4 V to 5.5 V input and delivering up to 25 V/25 mA output (1 W). It features constant peak-current control, 1.19 V ±1% feedback reference, and Chip Enable (CE) pin for battery-life extension in OLED bias and white LED backlighting applications.
For engineers reviewing the NCP1406SNT1G datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (1.8 V typ), shutdown current (0.3 µA), soft-start time (3–8 ms), thermal shutdown (140°C), and TSOP-5 package compatibility with space-constrained portable designs.
Technical Context
The NCP1406SNT1G employs Pulse Frequency Modulation (PFM) with constant peak-current control in Discontinuous Conduction Mode (DCM), enabling high efficiency across light-to-full load. Its internal 0.8 A switch and integrated current-sense resistor eliminate external sensing components.
Operation relies on a 1.19 V bandgap reference compared against FB pin voltage via an external resistor divider; output voltage is programmable from VIN to 25 V. Timing is governed by fixed maximum on-time (0.9 µs typ) and minimum off-time (0.13 µs typ), supporting switching frequencies up to 1 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.4 V to 5.5 V - supports single Li-ion or dual alkaline/NiMH batteries without pre-regulation. |
| Output Voltage Range | Up to 25 V - adjustable via FB resistor divider; enables direct biasing of large OLED panels and series white LEDs. |
| Switch Current Limit | 0.8 A typical - prevents inductor saturation and limits startup overshoot; sets max output power at ~1 W. |
| Feedback Reference | 1.19 V ±1% at 25°C - defines output regulation accuracy; temperature coefficient ±1.6 mV/°C ensures stability over −40°C to +85°C. |
| Quiescent Current | 15 µA (non-switching) - minimizes standby drain in battery-powered systems; drops to 0.3 µA in shutdown mode. |
| Startup Voltage | 1.8 V typical at no load - enables operation from deeply discharged cells; low enough for reliable wake-up from sleep states. |
| Thermal Shutdown | 140°C with 10°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-off. |
Pinout & Package
Package: TSOP-5 (also labeled SOT-23-5/SC-59-5), Pb-free, 5-pin surface-mount with 0.95 mm pitch and 1.5 mm × 2.9 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable control input | Active-high logic: ≥0.9 V enables operation; <0.3 V forces shutdown (0.3 µA IOFF); floating = enabled via internal 150 nA pull-up. |
| 2 - FB | Feedback voltage sense node | Connects to resistor divider from VOUT; comparator compares to 1.19 V reference to regulate output voltage. |
| 3 - VDD | Power supply input | Accepts 1.4–5.5 V; includes UVLO (1.0–1.3 V threshold) and powers internal circuitry including bandgap and PFM controller. |
| 4 - GND | Analog and power ground | Common return for feedback path, internal switch source, and control logic; must be low-impedance for stability. |
| 5 - LX | Switch node connection | Drain of internal NMOS switch; connects externally to inductor and Schottky diode anode; rated for 26 V peak. |
Key Features
| Feature | Design Value |
|---|---|
| PFM with constant peak-current control | Maintains >87% efficiency at 25 V/25 mA (VIN = 5 V) across full load range without external compensation. |
| Integrated 0.8 A / 26 V NMOS switch | Eliminates need for external MOSFET and current-sense resistor; reduces BOM count and layout area in TSOP-5 footprint. |
| Soft-start circuit | Gradually increases duty cycle over 3–8 ms to limit inrush current and minimize output overshoot during startup. |
| Thermal shutdown with hysteresis | Shuts down at 140°C junction temperature and resumes at 130°C - prevents thermal runaway while allowing recovery after transient overload. |
| Low shutdown current | 0.3 µA max - extends battery life in standby modes such as display sleep or system suspend in portable devices. |
Applications
| OLED Display Bias Supply | White LED Backlight Driver |
|---|---|
|
Use Scenario: Powering small-to-large passive or active matrix OLED panels requiring stable 15–25 V bias rails. IC Role / Device Role / Timing Role: Step-up converter regulating output via FB pin; PFM modulation adapts switching frequency to load, minimizing idle loss. Use Value: Delivers 25 V @ 25 mA with 87% efficiency at 5 V input, enabling compact, battery-efficient displays in wearables and handhelds. |
Use Scenario: Driving 3–8 white LEDs in series for LCD backlighting in PDAs, digital cameras, and portable video players. IC Role / Device Role / Timing Role: Constant-voltage boost regulator; CE pin accepts PWM dimming signals for precise brightness control. Use Value: Supports PWM-enabled dimming without external FETs; low 15 µA quiescent current preserves battery runtime during partial illumination. |
| Portable Device Power Management | Low-Voltage Battery-Powered Systems |
|
Use Scenario: Generating auxiliary rails (e.g., 8–15 V) from 2.4–3.7 V battery sources in cell phones, games, and portable audio. IC Role / Device Role / Timing Role: Primary DC-DC booster with enable/disable control; operates down to 1.4 V input to maximize usable battery capacity. Use Value: Starts reliably at 1.8 V and sustains regulation to 1.4 V, extracting >95% of energy from two-cell alkaline or NiMH batteries. |
Use Scenario: Providing regulated high-voltage bias for sensors, RF modules, or analog front-ends in ultra-low-power IoT edge nodes. IC Role / Device Role / Timing Role: Low-quiescent, enable-controlled boost stage; soft-start prevents supply rail collapse during cold-start conditions. Use Value: 0.3 µA shutdown current and 1.8 V startup enable integration into energy-harvesting or coin-cell-powered systems with multi-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVT | Higher 28 V switch rating; 0.5 A current limit; fixed 1.23 V reference; requires external compensation capacitor. | Better suited for higher-output-voltage (>25 V) or higher-precision (±0.5%) regulation needs; less tolerant of low-input transients. | Choose TPS61040DRVT when tighter output tolerance or higher voltage margin is required; verify layout for added compensation network. |
| MAX17222ELT+T | Lower 5.5 V max switch voltage; 0.6 A current limit; 1.215 V reference; integrated Schottky diode; 0.9 µA quiescent current. | Optimized for ultra-low-IQ applications below 5 V output; unsuitable for 25 V OLED bias due to voltage limitation. | Prefer MAX17222ELT+T for sub-5 V boost needs where <1 µA IQ is critical; avoid for >15 V outputs. |
Compared with TPS61040DRVT and MAX17222ELT+T, the NCP1406SNT1G uniquely balances 25 V capability, 0.8 A switch current, and 15 µA operating current in a TSOP-5 package-making it optimal for mid-power OLED and LED bias where voltage headroom and efficiency coexist.
Availability
NCP1406SNT1G is available at Aetrix Electronics and suitable for OLED display bias, white LED backlighting, and portable device power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP1406SNT1G 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 specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and portable markets.
The NCP1406SNT1G belongs to onsemi's high-efficiency PFM boost converter product line, designed specifically for battery-powered portable electronics needing compact, low-quiescent, and wide-input-range DC-DC conversion.
FAQ
What is the minimum input voltage required for NCP1406SNT1G to start switching?
The NCP1406SNT1G has a typical startup voltage of 1.8 V at no load, with a guaranteed minimum of 2.0 V across temperature. This allows reliable operation from partially discharged alkaline or NiMH cells. Below this threshold, the internal undervoltage lockout (UVLO) holds the device in reset. The NCP1406SNT1G will resume switching once VDD rises above the UVLO release threshold of approximately 1.3 V.
Can NCP1406SNT1G drive multiple white LEDs in series?
Yes - the NCP1406SNT1G is explicitly designed for white LED backlighting, supporting up to 8 LEDs in series (requiring ~24 V) with 25 mA output current. Its 25 V maximum output and 0.8 A switch current accommodate common LED forward voltages (3.0–3.4 V per diode). The CE pin also enables direct PWM dimming without external circuitry, making the NCP1406SNT1G ideal for brightness control in portable displays.
How does the CE pin function in NCP1406SNT1G, and what happens when it's left unconnected?
The CE pin is an active-high enable input: ≥0.9 V enables switching, <0.3 V disables it (reducing supply current to 0.3 µA). Internally, a 150 nA current source pulls CE to VDD, so leaving it floating automatically enables the NCP1406SNT1G. This simplifies designs where always-on operation is acceptable. For dynamic control, apply a clean logic signal - avoid slow-rising edges to prevent metastability during transition.
What is the purpose of the soft-start feature in NCP1406SNT1G, and how long does it last?
The soft-start circuit in NCP1406SNT1G gradually increases the duty cycle over 3–8 ms (typical 3 ms at 25°C) to limit inrush current and suppress output voltage overshoot during startup. This protects downstream capacitors and LEDs from stress, especially under heavy loads or low-ESR output capacitance. The timing is internally fixed and not user-adjustable, ensuring consistent behavior across operating conditions without external components.
Does NCP1406SNT1G support continuous conduction mode (CCM), and is it recommended?
The NCP1406SNT1G is optimized for Discontinuous Conduction Mode (DCM) and guarantees stable operation only in DCM. While it can operate in CCM under heavy loads, onsemi explicitly states that "stable operation in continuous conduction mode is not guaranteed" - group pulsing or double pulsing may occur, increasing ripple and reducing efficiency. Designers should select inductance and load conditions to maintain DCM, using the provided IROOM equation to verify mode boundary.
NCP1406SNT1G 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.19V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 25mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP1406SNT1G FAQ
1.How can I place an order for NCP1406SNT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1406SNT1G 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 NCP1406SNT1G reliable?
The price and inventory of NCP1406SNT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1406SNT1G is usually 5 days.
3.What payment methods are accepted for NCP1406SNT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1406SNT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1406SNT1G?
NCP1406SNT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1406SNT1G 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 NCP1406SNT1G?
For technical support, including NCP1406SNT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1406SNT1G requirements.
6.How does Aetrix verify that NCP1406SNT1G is sourced from the original manufacturer or authorized distributors?
All NCP1406SNT1G 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 NCP1406SNT1G meets industry standards.
7.What is the process for return or replacement of NCP1406SNT1G?
All NCP1406SNT1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1406SNT1G, 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 NCP1406SNT1G part is unused and in its original packaging.
Return procedure for NCP1406SNT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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