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NJU7630

New Japan Radio
Part Number NJU7630
Manufacturer New Japan Radio
Description PWM control Step-Down switching regulator
Published Feb 18, 2009
Detailed Description NJU7630 PWM control Step-Down switching regulator IC ■ GENERAL DESCRIPTION The NJU7630 is a low voltage operation high...
Datasheet PDF File NJU7630 PDF File

NJU7630
NJU7630

Overview
NJU7630 PWM control Step-Down switching regulator IC ■ GENERAL DESCRIPTION The NJU7630 is a low voltage operation high-speed switching regulator control IC for step-down converter, with PWM control.
It incorporates a totem pole output, which can drive an external MOS-FET easily.
The NJU7630 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 8-lead DMP and MSOP (TVSP) packages.
It is suitable for battery powered applications.
■ PACKAGE OUTLINE NJU7630M (DMP8) NJU7630RB1 (MSOP8 (TVSP8)) ■ FEATURES ● PWM switching control ■ PRODUCT VARIATION ● Operating Voltage ● Wide Oscillator Range ● Maximum Duty Cycle 2.
2V to 8V 300kHz to 1MHz 100% NJU7631 PWM/PFM Light Load to Efficiency NJU7632 Standby Function ● Quiescent Current 800µA typ.
● Soft-Start Function Internal : 16ms typ.
or adjustable ● Dead Time Control ● Timer Latch for Short Circuit Protection ● C-MOS Technology NJU7630 PWM Control Over Current Protection NJU7640 Constant Current Control NJU7650 ● Package Outline NJU7630M : DMP8 NJU7630RB1 : MSOP8 (TVSP8)* *MEET JEDEC MO-187-DA / THIN TYPE ■ PIN CONFIGURATION 1 2 3 4 NJU7630M NJU7630RB1 8 7 6 5 PIN FUNCTION 1.
OUT 2.
V+ 3.
FB 4.
IN5.
SCP 6.
DTC 7.
RT 8.
GND Ver.
2012-08-03 -1- NJU7630 ■ BLOCK DIAGRAM FB IN- 1V Vref V+ ER⋅AMP Soft Start Latch UVLO SCP 1V 2µA SCP 2kΩ 0.
5 RT A 1V DTC OSC 0.
5V RT RT 0.
8V 0.
2V PW M Buffer OUT GND -2- Ver.
2012-08-03 NJU7630 ■ ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Output Pin Current Power Dissipation SYMBOL V+ IO PD Operating Temperature Range Storage Temperature Range TOPR TSTG MAXIMUM RATINGS +9 ±50 DMP8 :300 MSOP8 (TVSP8) :320 -40 to +85 -40 to +125 (Ta=25°C) UNIT V mA mW °C °C ■ RECOMMENDED OPERATING CONDITIONS PARAMETER Operating Voltage Oscillator Timing Resistor Oscillation Frequency SYMBOL V+ RT fOSC MIN.
2.
2 30 300 (Ta=25°C) TYP.
MAX.
UN...


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