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onsemi NCP1423DMR2
- Part No.:
- NCP1423DMR2
- Manufacturer:
- onsemi
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
NCP1423DMR2.pdf
- Description:
- IC REG BOOST ADJ 1.2A 10-MICRO
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
NCP1423DMR2 from onsemi is a monolithic micropower synchronous boost DC-DC converter IC designed for battery-powered handheld electronics. It delivers up to 400 mA output at 3.3 V from 2.5 V input, integrates synchronous rectification to eliminate external Schottky diodes, features true-cutoff shutdown (isolating OUT from BAT), and includes ring-killer circuitry for DCM-mode ringing suppression.
For engineers reviewing the NCP1423DMR2 datasheet, pinout, applications, or equivalent options, key selection considerations include its 9.0 µA quiescent current, 0.8 V startup voltage, ±1.5% output voltage accuracy, 1.2 A cycle-by-cycle current limit, and Micro10 package compatibility with space-constrained portable designs.
Technical Context
The NCP1423DMR2 employs a PFM control scheme with fixed 0.5 V FB threshold and internal 1.195 V reference, enabling precise output regulation via external resistor divider. Its dual-MOSFET synchronous rectifier (N-FET + P-FET) is actively controlled with dead-time management and ZLC comparator-based zero-current detection to prevent reverse conduction in DCM.
True-cutoff is implemented via EN-pin–controlled isolation of both LX and BAT paths to OUT, reducing shutdown leakage to ≤1.5 µA. Integrated protection includes thermal shutdown (145 °C), overvoltage protection, low-battery detection (0.5 V threshold with 15 mV hysteresis), and auto-discharge (100 Ω internal switch).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 400 mA @ 3.3 V out from 2.5 V in; enables compact power rails for wireless headsets and optical mice |
| Quiescent Current | 9.0 µA typical operating current; extends battery life in always-on sensor nodes and PDAs |
| Startup Voltage | 0.85 V min; supports single-cell NiMH/NiCd operation down to end-of-life battery voltage |
| Output Accuracy | ±1.5% over temperature; ensures stable MCU core or RF transceiver supply without calibration |
| Switching Frequency | Up to 600 kHz; allows use of 5.6 µH low-profile inductors and 22 µF ceramic output capacitors |
| Current Limit | 1.2 A cycle-by-cycle; protects internal MOSFETs during short-circuit or heavy transient loads |
| Thermal Shutdown | 145 °C with 30 °C hysteresis; prevents latch-up and enables safe recovery after overload |
Pinout & Package
Package: Micro10 (Case 846B), 3.0 mm × 3.0 mm × 0.95 mm, Pb-free, RoHS-compliant surface-mount package with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable / Low-Battery Input | Pull below 0.5 V to disable IC; also serves as LBI sense node when not used for enable |
| 2 - REF | 1.195 V Reference Output | Bypass with ≥100 nF capacitor; supplies bias for external circuits up to 2.5 mA |
| 3 - FB | Feedback Input | Compares divided output voltage to 0.5 V internal reference; sets VOUT via R1/R2 divider |
| 4 - GND | Power Ground | Common return for all internal circuits and external components; star-ground connection required |
| 5 - OUT | Power Output | Delivers regulated output; provides bootstrap supply to internal circuitry |
| 6 - BAT | Battery Input | Primary power source; connects to internal ring-killer network for DCM ringing suppression |
| 7 - LX | Switch Node | Drain of internal N-FET and P-FET; connects to inductor; high dv/dt node requiring tight layout |
| 8 - ADEN | Auto-Discharge Enable | High-active input; activates 100 Ω internal discharge path to bring VOUT < 0.4 V after shutdown |
| 9 - LBI | Low-Battery Sense Input | Monitors resistor divider from BAT; triggers LBO when voltage falls below 0.5 V ±15 mV |
| 10 - LBO | Open-Drain LBO Output | Sinks current when LBI < 0.475 V; requires external pull-up for system-level battery alert signaling |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated N-FET + P-FET replaces Schottky diode, achieving 92% efficiency at 3.3 V/400 mA from 2.5 V |
| Ring-Killer Circuitry | Active suppression of high-frequency ringing in discontinuous conduction mode, improving EMI and reliability |
| True-Cutoff Function | Complete isolation of OUT from BAT and LX in shutdown, limiting leakage to ≤1.5 µA for long-term storage |
| Adjustable Output Voltage | Externally set via FB divider; supports 1.8 V to 3.3 V outputs with ±1.5% accuracy across −40 °C to +85 °C |
| Low-Battery Detection | Dedicated comparator with 0.5 V threshold and 15 mV hysteresis; open-drain LBO output drives external logic or LED |
Applications
| Wireless Optical Mouse | Wireless Headset |
|---|---|
Use Scenario: Single-cell NiMH/NiCd powered optical navigation module requiring stable 3.3 V rail under pulsed LED and sensor loads. IC Role / Device Role / Timing Role: Synchronous boost converter providing regulated 3.3 V output with ultra-low quiescent current during sleep mode. Use Value: Enables >6-month battery life via 9.0 µA IQ and true-cutoff isolation; 600 kHz switching minimizes inductor size for slim form factor. | Use Scenario: Bluetooth audio headset with variable load (RF + codec + speaker driver) powered by one NiMH cell (1.0–1.5 V range). IC Role / Device Role / Timing Role: High-efficiency step-up regulator delivering 3.3 V at up to 200 mA with adaptive PFM control for light-load efficiency. Use Value: 92% peak efficiency and 0.85 V startup sustain operation through full battery discharge curve; LBO alerts host MCU of low battery. |
| Internet Audio Player | Hand-Held Instrument |
Use Scenario: Portable MP3 player with LCD backlight, audio DAC, and flash memory, powered by two-series NiMH cells (2.0–2.8 V). IC Role / Device Role / Timing Role: Dual-output-capable boost IC generating 3.3 V for digital core and 1.8 V for memory interface via separate FB dividers. Use Value: External adjustability and ±1.5% accuracy ensure clean power for sensitive analog audio stages; ring-killer reduces audible noise in speaker output. | Use Scenario: Battery-operated multimeter or data logger requiring precision analog front-end supply and microcontroller core voltage. IC Role / Device Role / Timing Role: Primary DC-DC converter supplying regulated 3.3 V to MCU and ADC, with low-noise REF pin powering reference circuitry. Use Value: 1.195 V REF output with ±0.05 mV/°C TC and 1.0 µA FB input current minimizes measurement drift; thermal shutdown protects against probe short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | Higher 1.5 A current limit; 2.5 V–5.5 V input range; no integrated ring-killer or true-cutoff | Requires external Schottky diode; lacks LBO/LBI pins; better suited for higher-power industrial sensors | Choose TPS61200DRCT only if >400 mA continuous output or wider VIN range is required; NCP1423DMR2 preferred for ultra-low-IQ portable devices |
| MAX17065ETA+ | Fixed 3.3 V output; 1.8 V–5.5 V input; 2.5 µA IQ; no ADEN or ring-killer | Non-adjustable VOUT; lacks low-battery detection and auto-discharge; optimized for minimal BOM count | Select MAX17065ETA+ for cost-sensitive, fixed-voltage applications where feature set can be reduced; NCP1423DMR2 retains design flexibility for multi-rail systems |
Compared with TPS61200DRCT and MAX17065ETA+, the NCP1423DMR2 uniquely combines true-cutoff isolation, ring-killer suppression, and integrated LBO/LBI in a 3.0 mm × 3.0 mm package-making it optimal for space- and battery-life–constrained handhelds where system-level protection and low standby drain are critical.
Availability
NCP1423DMR2 is available at Aetrix Electronics and suitable for wireless optical mouse, wireless headset, and hand-held instrument designs requiring stable component supply with long lifecycle support.
Supply support for NCP1423DMR2 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP1423DMR2 belongs to onsemi's micropower DC-DC converter product line, engineered specifically for ultra-low-quiescent-current battery-powered portable electronics with stringent size and efficiency requirements.
FAQ
What is the minimum input voltage required for the NCP1423DMR2 to start switching?
The NCP1423DMR2 has a guaranteed minimum startup voltage of 0.85 V at 25 °C, with a maximum of 0.90 V across temperature. This allows reliable operation from deeply discharged single-cell NiMH/NiCd batteries. The device achieves this with internal charge pump and low-threshold comparators, and the NCP1423DMR2 maintains regulation even as input drops further during discharge cycles.
How does the true-cutoff function work in the NCP1423DMR2, and what is its benefit?
The NCP1423DMR2 implements true-cutoff by disabling internal conduction paths from both BAT and LX to OUT when the EN pin is pulled below 0.5 V. This physically isolates the output from the battery, reducing shutdown current to ≤1.5 µA. Unlike standard shutdown modes that leave body-diode leakage paths active, the NCP1423DMR2 eliminates parasitic discharge-critical for devices stored for months between uses.
Can the NCP1423DMR2 generate both 1.8 V and 3.3 V outputs, and how is output voltage set?
Yes-the NCP1423DMR2 supports adjustable output voltages from 1.8 V to 3.3 V using an external resistor divider on the FB pin. The relationship is VOUT = 0.5 V × (1 + R1/R2), where R2 is typically 100 kΩ. For example, R1 = 560 kΩ yields 3.3 V; R1 = 100 kΩ yields 1.8 V. The NCP1423DMR2 maintains ±1.5% accuracy across load and temperature, enabling dual-rail designs with one IC.
What protection features are integrated into the NCP1423DMR2?
The NCP1423DMR2 integrates thermal shutdown (145 °C, 30 °C hysteresis), overvoltage protection, cycle-by-cycle current limiting (1.2 A), low-battery detection (0.5 V threshold), and ring-killer circuitry for DCM-mode ringing suppression. All operate autonomously without external components. These protections are active during normal operation and remain functional in the NCP1423DMR2's 9.0 µA quiescent state.
Is the NCP1423DMR2 pin-compatible with other onsemi boost converters like the SCV1423DMR2G?
No-the NCP1423DMR2 and SCV1423DMR2G share identical pinout, package, and electrical specifications, but SCV1423DMR2G is marked as discontinued per onsemi's December 2025 datasheet revision. The NCP1423DMR2 remains the active, recommended version for new designs; both require identical PCB layout and external components, but only the NCP1423DMR2 is supported for ongoing production.
NCP1423DMR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-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):
- 0.8V
- Voltage - Input (Max):
- 3.3V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 1.2A (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-Micro
NCP1423DMR2 FAQ
1.How can I place an order for NCP1423DMR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1423DMR2 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 NCP1423DMR2 reliable?
The price and inventory of NCP1423DMR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1423DMR2 is usually 5 days.
3.What payment methods are accepted for NCP1423DMR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1423DMR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1423DMR2?
NCP1423DMR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1423DMR2 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 NCP1423DMR2?
For technical support, including NCP1423DMR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1423DMR2 requirements.
6.How does Aetrix verify that NCP1423DMR2 is sourced from the original manufacturer or authorized distributors?
All NCP1423DMR2 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 NCP1423DMR2 meets industry standards.
7.What is the process for return or replacement of NCP1423DMR2?
All NCP1423DMR2 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1423DMR2, 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 NCP1423DMR2 part is unused and in its original packaging.
Return procedure for NCP1423DMR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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