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NJM2309 Series
Switching Regulator Control IC for Step-Down

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ECAD Model: Learn more
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Description

The NJM2309 is a step-down Switching regulator IC with a wide operating voltage.It features an open collector driver that can configure step-down applications.Internal soft-start function and timer latch function for short circuit protection are included, requiring no external components.

Spec

Standard
Input Voltage Range 3.6 V to 32 V (36 V)
Operating Temperature Range -40°C to 85°C
Supply Current Typ. 5500 µA
Output Voltage Range 0.52 V to 30 V
Output Voltage Accuracy ± 2 %
Oscillator Frequency 5kHz to 500 kHz
Maximum Duty Cycle Duty Cycle (0% to 100%)
Package DMP8
SOP8 JEDEC 150mil
SSOP8
Control PWM switching control
Function Soft Start function
Timer Latch for Short Circuit Protection
Note Under Voltage Lockouts (U.V.LO)

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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)		 3.6
VIN
max (V)		 32
VOUT
min (V)		 0.52
VOUT
max (V)		 30
ISS
(µA)		 5500

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
NJM2309M
  • gradeConsumer
 DMP8 - NJM-1-s-fr
NJM2309E
  • gradeConsumer
 SOP8 JEDEC 150mil(EMP8) - NJM-1-s-fr
NJM2309V
  • gradeConsumer
 SSOP8 - 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
NJM2309 Series