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

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

Functional Description

Quality &
Packages

Product Name	Compatibility	Package	Marking	Reliability
NJU7640RB1		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.

TSD	Thermal Shutdown Function
ILX	LX Current Limit Function
OCP	Overcurrent Protection
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