NJW4122 Series

2A Synchronous Buck Converter for POL

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Description
The NJW4122 is a synchronous buck converter with 2A MOSFET. The NJW4122 has wide switching oscillating frequency range, 100kHz to 2.4MHz and external clock synchronization function. Therefore it can avoid interference with the AM radio frequency. Internal protection functions: UVLO, an over current protection and a thermal shutdown circuit can protect at abnormal condition. It is suitable for power supply circuit of SoC, DSP, DDR memory and so on that needs fast transient response.

Applications
- Power supply for SoC, ASIC, DDR and the others

Spec

	Consumer
Input Voltage Range	2.7 V to 5.5 V (7 V)
Operating Temperature Range	-40°C to 125°C
Supply Current	Typ. 2200 µA
Standby Current	1 (max.) µA
Output Voltage Range	0.6 V to 5 V
Output Voltage Accuracy	± 1 %
Output Current	2000 mA
Package	DFN8-U1(ESON8-U1)
Control	Current Mode Control PWM Control
Function	Standby Function Soft Start Function (1ms typ.) Over Current Protection (Hiccup type) Thermal Shutdown Protection
Note	UVLO (Under Voltage Lockout) Synchronous Rectification Correspond to Ceramic Capacitor (MLCC)

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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
NJW4122KU1		DFN8-U1(ESON8-U1)	-	NJW-1-s-r

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