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NJM2345 Series
PWM DC/DC Converter IC with Standby Function

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ECAD Model: Learn more
  • Standard
  • RoHS
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Description

The NJM2345 is a step down PWM DC/DC converter IC.An internal 1.5A power transistor, a pulse-by pulse current limit circuit and a 1% precision reference make the NJM2345 suitable for a wide range of voltage converter needs.The NJM2345 features a standby function that can be used for both power saving and safety operation.

Spec

Standard
Input Voltage Range 3 V to 40 V (40 V)
Operating Temperature Range -40°C to 85°C
Supply Current Typ. 2800 µA
Standby Current 9 µA
Output Voltage Range 1.25 V to 38 V
Output Voltage Accuracy ± 1 %
Output Current 1500 mA
Oscillator Frequency 1kHz to 150kHz
Maximum Duty Cycle 100%
Package DMP8
Control Internal Over Current Limit Circuit
Function Standby Function (9µA typ.)
Note Internal High Power Transistor

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Protections / Functions

TSD OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust

Functional Description

TSD Thermal Shutdown Function
OCP Overcurrent Protection

Note: The function previously labeled as "ILX (LX Current Limit Function)" is now shown as "OCP."
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

Functional Description

TSD Thermal Shutdown Function
OCP Overcurrent Protection

Note: The function previously labeled as "ILX (LX Current Limit Function)" is now shown as "OCP."
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Buck
VIN
min (V)		 3
VIN
max (V)		 40
VOUT
min (V)		 1.25
VOUT
max (V)		 38
IOUT
(mA)		 1500
ISS
(µA)		 2800

Technical Documents

  • Related Links

    • Prime Designer

      Online Design Tool

      Registration to myNISD is required to use some of the functions, such as simulations.

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Quality & Packages

Product Name Compatibility Package Marking Reliability
NJM2345M
  • gradeConsumer
 DMP8 - NJM-1-s-fr
  • Refer to the datasheets for the details on the product.
  • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

FAQ

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Buy / Contact

  • Purchase, Request for samples and documents
    Sales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
  • Available from 1 piece!
    Our electronic device products are available through our authorized online distributors.
  • Technical Support
NJM2345 Series