NJU7677 Datasheet, PDF (1/9 Pages) New Japan Radio – 1.8V Operate PWM control Step-Up / Flyback switching regulator IC

NJU7677
1.8V Operate PWM control Step-Up / Flyback switching regulator IC
■GENERAL DESCRIPTION
NJU7677 is a high speed low voltage operation switching
regulator control IC. It features a totem pole driver that can directly
drive an external MOS-FET.
Internal soft-start function, dead time control and timer latch
function are included, requiring no external components. All
parameters can be optimized by additional external components for
design flexibility.
■PACKAGE OUTLINE
NJU7677RB1
■FEATURES
● PWM switching control
● Operating Voltage
1.8V to 7V
● Wide Oscillator Range 300kHz to 1MHz
● Maximum Duty Cycle 90% typ.
● Quiescent Current
600µA typ.
● Soft-Start Function
Internal : 4ms typ. or adjustable
● Dead Time Control
● Timer Latch for Short Circuit Protection
● C-MOS Technology
● Package Outline
NJU7677RB1 : TVSP8
■PIN CONFIGURATION
PIN FUNCTION
1
8 _{1. V}+
2
7
2. FB
3. IN-
3
6 ^{4. SCP}
5. DTC
4
5 6. RT
7. GND
NJU7677RB1
8. OUT
Ver.2009-09-08
-1-