NCP1421DMR2G
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onsemi NCP1421DMR2G

Manufacturer No:
NCP1421DMR2G
Manufacturer:
onsemi
Package:
Tape & Reel (TR)
Description:
IC REG BOOST ADJ 1.5A MICRO8
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The NCP1421DMR2G is a monolithic micropower high-frequency step-up switching converter IC designed by onsemi. This IC is specifically tailored for battery-operated handheld electronic products, capable of handling loads up to 600 mA. It features a high switching frequency of up to 1.2 MHz, allowing for the use of small-sized inductors and output capacitors, which is ideal for low-profile designs. The NCP1421 integrates Sync-Rect technology to improve efficiency and eliminate the need for an external Schottky diode. Additionally, it includes a True-Cutoff function that significantly reduces shutdown current to typically only 50 nA, and a Ring-Killer to eliminate high-frequency ringing in discontinuous conduction mode.

Key Specifications

Characteristic Min Typ Max Unit
Operating Voltage (VIN) 1.0 5.0 V
Output Voltage Range (VOUT) 1.5 5.0 V
Reference Voltage (VREF_NL) at 25°C 1.183 1.200 1.217 V
Reference Voltage Temperature Coefficient (TCVREF) -0.03 mV/°C
EN Pin Shutdown Threshold (VSHDN) at 25°C 0.35 0.5 0.67 V
Thermal Shutdown Temperature (TSHDN) 145 °C
Thermal Shutdown Hysteresis (TSDHYS) 30 °C
Switching Frequency Up to 1.2 MHz
Cycle-by-Cycle Current Limit 1.5 A
Shutdown Current Typically 50 nA

Key Features

  • High switching frequency up to 1.2 MHz for low-profile designs.
  • Sync-Rect technology to improve efficiency and eliminate the external Schottky diode.
  • True-Cutoff function to reduce shutdown current to typically only 50 nA.
  • Ring-Killer to eliminate high-frequency ringing in discontinuous conduction mode.
  • Low-Battery Detector with adjustable threshold.
  • Logic-Controlled Shutdown Pin for multi-function control.
  • On-chip thermal shutdown with hysteresis.
  • Pb-Free package available.
  • High accuracy reference voltage with ±2% load regulation.

Applications

  • Personal Digital Assistants (PDA).
  • Handheld Digital Audio Products.
  • Camcorders and Digital Still Cameras.
  • Hand-held Instruments.
  • Conversion from one to two Alkaline, NiMH, NiCd battery cells to 3.0-5.0 V or one Lithium-ion cell to 5.0 V.
  • White LED Flash for Digital Cameras.

Q & A

  1. What is the maximum output current of the NCP1421?

    The NCP1421 can handle loads up to 600 mA.

  2. What is the typical shutdown current of the NCP1421?

    The typical shutdown current is 50 nA.

  3. What is the operating voltage range of the NCP1421?

    The operating voltage range is from 1.0 V to 5.0 V.

  4. What is the output voltage range of the NCP1421?

    The output voltage range is from 1.5 V to 5.0 V.

  5. What is the switching frequency of the NCP1421?

    The switching frequency can be up to 1.2 MHz.

  6. Does the NCP1421 have thermal shutdown protection?

    Yes, it includes on-chip thermal shutdown with hysteresis.

  7. How is the low battery detection threshold set in the NCP1421?

    The low battery detection threshold is set using an external divider network comprised of resistors R3 and R4.

  8. What type of package is available for the NCP1421?

    The NCP1421 is available in a Pb-Free Micro8 package.

  9. What are some typical applications of the NCP1421?

    Typical applications include personal digital assistants, handheld digital audio products, camcorders, digital still cameras, and handheld instruments.

  10. How does the True-Cutoff function work in the NCP1421?

    The True-Cutoff function isolates the current through the body diode of switch M2 to the load, eliminating leakage current from the battery to the load in shutdown mode.

Product Attributes

Function:Step-Up
Output Configuration:Positive
Topology:Boost
Output Type:Adjustable
Number of Outputs:1
Voltage - Input (Min):1V
Voltage - Input (Max):5V
Voltage - Output (Min/Fixed):1.5V
Voltage - Output (Max):5V
Current - Output:1.5A (Switch)
Frequency - Switching:1.2MHz
Synchronous Rectifier:Yes
Operating Temperature:-40°C ~ 85°C (TA)
Mounting Type:Surface Mount
Package / Case:8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package:8-MSOP
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Similar Products

Part Number NCP1421DMR2G NCP1423DMR2G NCP1411DMR2G NCP1421DMR2
Manufacturer onsemi onsemi onsemi onsemi
Product Status Active Active Obsolete Obsolete
Function Step-Up Step-Up Step-Up Step-Up
Output Configuration Positive Positive Positive Positive
Topology Boost Boost Boost Boost
Output Type Adjustable Adjustable Adjustable Adjustable
Number of Outputs 1 1 1 1
Voltage - Input (Min) 1V 0.8V 1V 1V
Voltage - Input (Max) 5V 3.3V 5.5V 5V
Voltage - Output (Min/Fixed) 1.5V 1.8V 1.5V 1.5V
Voltage - Output (Max) 5V 3.3V 5.5V 5V
Current - Output 1.5A (Switch) 1.2A (Switch) 1A (Switch) 1.5A (Switch)
Frequency - Switching 1.2MHz 600kHz 600kHz 1.2MHz
Synchronous Rectifier Yes Yes Yes Yes
Operating Temperature -40°C ~ 85°C (TA) -40°C ~ 85°C (TA) -40°C ~ 85°C (TA) -40°C ~ 85°C (TA)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package 8-MSOP 10-Micro 8-MSOP 8-MSOP

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