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NJU7640 Series
Step-Down switching regulator IC with Over Current Protection

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Description

The NJU7640 is a low voltage operation high-speed switching regulator control IC for step-down converter, with a pulse-by-pulse over-current protection. The pulse-by-pulse over-current protection circuit can limit the over current in switching operation.It incorporates a totem pole output, which can drive an external MOS-FET easily. It also has a soft-start function and dead time control and their times are all adjustable with external parts.The NJU7640 is available in a small and thin 8-lead MSOP(TVSP) package.

Spec

Standard
Input Voltage Range 2.2 V to 8 V (9 V)
Operating Temperature Range -40°C to 85°C
Supply Current Typ. 800 µA
Output Voltage Range 1 V to 7.5 V
Output Voltage Accuracy ± 1 %
Oscillator Frequency 300kHz to 1MHz
Maximum Duty Cycle 100%
Package MSOP8(TVSP8)
Control PWM switching control
Function Soft-Start Function (Internal : 16ms typ. or adjustable)
Dead Time Control
Note Pulse-by-pulse over current protection

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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)		 2.2
VIN
max (V)		 8
VOUT
min (V)		 1
VOUT
max (V)		 7.5
ISS
(µA)		 800

Technical Documents

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Quality & Packages

Product Name Compatibility Package Marking Reliability
NJU7640RB1
  • gradeConsumer
 MSOP8(TVSP8) - NJU-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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    Sales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
  • Available from 1 piece!
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  • Technical Support
NJU7640 Series