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NJU7677 Series
1.8V Operate PWM Control Step-Up / Flyback Switching Regulator IC

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ECAD Model: Learn more
  • Standard
  • RoHS
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Description

The NJU7677 is a high-speed switching regulator control IC for PWM control step-up and fly-back converter that operates from 1.8V. It incorporates a totem pole driver output, which can directly drive an external MOS-FET. The NJU7677 also has a soft-start function, dead time control and timer latch for short circuit protection and their times are all adjustable with external parts. It is available in a small and thin 8-lead MSOP (TVSP) package. It is suitable for battery powered applications.

Spec

Standard
Input Voltage Range 1.8 V to 7 V (8 V)
Operating Temperature Range -40°C to 85°C
Supply Current Typ. 600 µA
Output Voltage Range 1.8 V to - V
Output Voltage Accuracy ± 1 %
Oscillator Frequency 300kHz to 1MHz
Maximum Duty Cycle 90% typ.
Package MSOP8(TVSP8)
Control PWM switching control
Function Soft-Start Function (Internal : 4ms typ. or adjustable)
Timer Latch for Short Circuit Protection
Dead Time Control

Download Datasheet

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 Boost
VIN
min (V)		 1.8
VIN
max (V)		 7
VOUT
min (V)		 1.8
ISS
(µA)		 600

Technical Documents

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Quality & Packages

Product Name Compatibility Package Marking Reliability
NJU7677RB1
  • 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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Buy / Contact

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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
NJU7677 Series