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onsemi NCP1411DMR2G
- Part No.:
- NCP1411DMR2G
- Manufacturer:
- onsemi
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
NCP1411DMR2G.pdf
- Description:
- IC REG BOOST ADJ 1A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,666
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Product details
Overview
NCP1411DMR2G from onsemi is a monolithic micropower synchronous rectified PFM step-up DC-DC converter IC designed for battery-powered handheld electronics. It delivers up to 250 mA output at 3.3 V from 2.5 V input, integrates an internal 1.0 A cycle-by-cycle current limit, features a 1.190 V ±0.6% reference with 2.5 mA load capability, and operates with only 9.0 µA typical quiescent current. It enables compact 3.3 V/5.0 V generation from one or two NiMH/NiCd or single Li-ion cells.
For engineers reviewing the NCP1411DMR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its Micro8 package footprint, synchronous rectification eliminating external Schottky diodes, Ring-Killer circuitry for EMI suppression in DCM, and logic-controlled shutdown with open-drain LBO output.
Technical Context
The NCP1411DMR2G uses a PFM control scheme with fixed 1.4 µs max ON-time and 0.31 µs min OFF-time to regulate output voltage via feedback to the FB pin. Its internal architecture includes dual power FETs (N-FET main switch + P-FET synchronous rectifier), a dedicated ZLC comparator for zero-current detection in DCM, and integrated Ring-Killer damping switch (M3) to suppress LX node ringing.
It implements a 30 mV hysteresis low-battery detector referenced to the 1.190 V internal bandgap, with LBI/EN serving as combined enable and sense input, and LBO as open-drain output. The REF pin provides a stable 1.190 V reference with ±0.015 mV load regulation and 0.03 mV/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 250 mA at VIN = 2.5 V, VOUT = 3.3 V - supports PDA, digital audio, and camera power rails |
| Reference Voltage | 1.190 V ±0.6% @ 25°C - sets precise output voltage via external resistor divider (VOUT = 1.19 × (1 + RFB1/RFB2)) |
| Quiescent Current | 9.0 µA typical - enables multi-month battery life in always-on portable devices |
| Switching Frequency | Up to 600 kHz - allows use of small 10–47 µH low-profile inductors and ceramic output capacitors |
| Current Limit | 1.0 A cycle-by-cycle - protects internal N-FET during startup, overload, or short-circuit conditions |
| Startup Voltage | 1.0 V guaranteed at no load - supports operation down to single alkaline or NiMH cell depletion |
| Efficiency | Up to 92% - achieved via synchronous rectification eliminating Schottky forward drop loss |
| Operating Temp | −40°C to +85°C ambient - suitable for consumer handheld and industrial portable instruments |
Pinout & Package
The NCP1411DMR2G is housed in a Pb-free Micro8 surface-mount package (Case 846A-02), measuring 3.0 mm × 3.0 mm × 0.9 mm with 0.65 mm pitch, optimized for space-constrained portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback Input | Connects to voltage divider output; regulates VOUT by holding FB = 1.190 V |
| 2 LBI/EN | Low-Battery Input / Enable | Combined analog sense input (threshold = 1.190 V) and digital enable (logic high >0.6 V) |
| 3 LBO | Low-Battery Output | Open-drain output pulled low when LBI < 1.178 V; high-impedance during shutdown |
| 4 REF | Reference Voltage Output | 1.190 V ±0.6% source; requires 150 nF bypass if unloaded, 1.0 µF if loaded up to 2.5 mA |
| 5 BAT | Battery Input for Ring-Killer | Provides bias to internal Ring-Killer damping switch (M3); must connect to battery rail |
| 6 GND | Power Ground | Common return for power switches, reference, and feedback; requires star-ground layout |
| 7 LX | Switch Node | Drain connection of internal N-FET and P-FET; connects to inductor and optional startup Schottky |
| 8 OUT | Power Output | Main regulated output; supplies bootstrapped power to internal circuitry and drives output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated P-FET replaces external Schottky diode, reducing conduction loss and improving efficiency up to 92% |
| Ring-Killer Circuitry | Dedicated internal damping switch suppresses LX node ringing in DCM, lowering EMI without external components |
| Low-Battery Detector | Accurate 1.190 V threshold with 30 mV hysteresis and open-drain LBO output for system-level battery monitoring |
| Logic-Controlled Shutdown | LBI/EN pin enables full shutdown with <0.05 µA supply current; eliminates standby drain in battery-critical systems |
| High-Accuracy Reference | 1.190 V ±0.6% reference with ±0.015 mV load regulation supports stable output across 0–2.5 mA loading |
| Micro8 Package | Compact 3.0×3.0 mm footprint with 0.65 mm pitch enables high-density portable PCB designs |
Applications
| Personal Digital Assistant (PDA) | Handheld Digital Audio Player |
|---|---|
Use Scenario: Powering 3.3 V logic and display subsystems from two alkaline cells (2.0–3.2 V range). IC Role / Device Role / Timing Role: Primary step-up regulator providing regulated 3.3 V rail with ultra-low quiescent current to extend battery runtime. Use Value: 9.0 µA IQ and 92% peak efficiency enable >100-hour playback on AA batteries without thermal derating. | Use Scenario: Generating clean 3.3 V supply for DAC, codec, and microcontroller in flash-based MP3 players. IC Role / Device Role / Timing Role: Synchronous boost converter with Ring-Killer ensuring low EMI during headphone amplifier switching transients. Use Value: Eliminates need for external Schottky and damping RC network, reducing BOM count and board area by 30%. |
| Digital Still Camera | Handheld Test Instrument |
Use Scenario: Supplying 5.0 V flash LED driver and 3.3 V image sensor interface from single Li-ion cell (3.0–4.2 V). IC Role / Device Role / Timing Role: Adjustable-output boost converter supporting both 3.3 V and 5.0 V rails via feedback resistor change. Use Value: 1.0 V startup capability ensures reliable flash operation even at end-of-discharge (3.0 V battery). | Use Scenario: Providing stable 3.3 V supply for precision ADC, op-amps, and wireless MCU in portable multimeters. IC Role / Device Role / Timing Role: Low-noise, high-accuracy boost regulator with 1.190 V reference used for internal voltage calibration reference. Use Value: ±0.6% reference tolerance and <0.03 mV/°C drift support 16-bit measurement accuracy over −20°C to +70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61022DRCT | Higher 2-MHz switching frequency; 3.0-V minimum startup; no integrated Ring-Killer; 12-pin WSON package | Requires external EMI filtering in DCM; better suited for space-constrained apps needing faster transient response | Select when board area is tighter than 3×3 mm and EMI filtering can be added externally |
| MAX77812EWA+T | Integrated I2C interface; programmable VOUT; 1.8-V minimum startup; 2.0-A current limit; 16-pin WLP package | Supports dynamic voltage scaling and telemetry; not pin-compatible; requires firmware integration | Select when system-level programmability and telemetry outweigh cost and layout simplicity |
Compared with TPS61022DRCT and MAX77812EWA+T, the NCP1411DMR2G offers unique value in ultra-low IQ (9.0 µA), guaranteed 1.0-V startup, and integrated Ring-Killer-making it optimal for cost-sensitive, battery-life-critical handhelds where minimal external components and inherent EMI robustness are required.
Availability
NCP1411DMR2G is available at Aetrix Electronics and suitable for personal digital assistants, handheld audio players, digital still cameras, and portable test instruments requiring stable component supply and long-term lifecycle support.
Supply support for NCP1411DMR2G 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 NCP1411DMR2G belongs to onsemi's micropower DC-DC converter product line, engineered specifically for ultra-low-power, battery-operated portable electronics demanding high efficiency, minimal external components, and robust EMI performance.
FAQ
What is the minimum input voltage required for NCP1411DMR2G to start switching?
The NCP1411DMR2G guarantees startup at 1.0 V with no load, verified across temperature and process corners. This enables reliable operation from deeply discharged single-cell alkaline, NiMH, or NiCd batteries. Startup behavior depends on external CEN timing capacitor value and RLB1, which must satisfy RLB1 × CEN > 28 ms per the datasheet. At 1.0 V input, NCP1411DMR2G delivers reduced output current but maintains regulation.
How does the Ring-Killer circuit in NCP1411DMR2G reduce EMI?
The Ring-Killer in NCP1411DMR2G employs an internal damping switch (M3) that activates automatically during discontinuous conduction mode to provide a low-impedance path, dissipating residual inductive energy at the LX node. This suppresses high-frequency ringing (typically 20–100 MHz) caused by LC resonance between parasitic capacitance and the power inductor, directly reducing conducted and radiated EMI without requiring external snubbers. Performance is confirmed in Figure 22 of the NCP1411DMR2G datasheet.
Can NCP1411DMR2G drive a 5.0 V output from a single Li-ion cell?
Yes, the NCP1411DMR2G supports adjustable output voltages from 1.5 V to 5.5 V using an external resistor divider on the FB pin. For 5.0 V output from a 3.0–4.2 V Li-ion cell, set RFB1/RFB2 = (5.0/1.19) − 1 ≈ 3.2. At VIN = 3.0 V and VOUT = 5.0 V, it delivers up to ~150 mA continuously while maintaining >85% efficiency. Derating is required above 150 mA due to duty cycle and thermal limits.
What is the purpose of the BAT pin on NCP1411DMR2G?
The BAT pin on NCP1411DMR2G supplies bias voltage to the internal Ring-Killer damping switch (M3). It must be connected directly to the main battery rail-not the output or input capacitor-to ensure proper activation of the Ring-Killer during DCM operation. Leaving BAT unconnected or connecting it to OUT disables Ring-Killer functionality, resulting in increased EMI and potential system noise coupling into sensitive analog circuits.
Does NCP1411DMR2G require an external Schottky diode for normal operation?
No, the NCP1411DMR2G integrates a synchronous P-FET rectifier that eliminates the need for an external Schottky diode in standard operation. However, an optional MBR0502 Schottky diode between LX and OUT is recommended only when starting from ≤1.2 V input to assist initial bootstrap charging. This diode is inactive during normal regulation and does not affect efficiency or thermal performance once the converter is running.
NCP1411DMR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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):
- 1V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
NCP1411DMR2G FAQ
1.How can I place an order for NCP1411DMR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1411DMR2G 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 NCP1411DMR2G reliable?
The price and inventory of NCP1411DMR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1411DMR2G is usually 5 days.
3.What payment methods are accepted for NCP1411DMR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1411DMR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1411DMR2G?
NCP1411DMR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1411DMR2G 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 NCP1411DMR2G?
For technical support, including NCP1411DMR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1411DMR2G requirements.
6.How does Aetrix verify that NCP1411DMR2G is sourced from the original manufacturer or authorized distributors?
All NCP1411DMR2G 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 NCP1411DMR2G meets industry standards.
7.What is the process for return or replacement of NCP1411DMR2G?
All NCP1411DMR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1411DMR2G, 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 NCP1411DMR2G part is unused and in its original packaging.
Return procedure for NCP1411DMR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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