NJU7631 Datasheet, PDF (1/9 Pages) New Japan Radio – Step-Down Switching Regulator IC with Power Saving PWM/PFM control

NJU7631
Step-Down Switching Regulator IC with Power Saving PWM/PFM control
■ GENERAL DESCRIPTION
The NJU7631 is a low voltage operation high-speed switching
regulator control IC for step-down converter, with PWM/PFM
switching control. It can improve a switching efficiency on light load
with automatically changing between PWM and PFM controls. It
incorporates a totem pole output, which can drive an external
MOS-FET easily. The NJU7631 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.
■ PACKAGE OUTLINE
NJU7631RB1
(MSOP8 (TVSP8))
■ FEATURES
■ PRODUCT VARIATION
● Automatic PWM/PFM Control
● Operating Voltage
2.2V to 8V
● Wide Oscillator Range 300kHz to 1MHz
NJU763x**
Standby Function
PWM/PFM
● Maximum Duty Cycle 100%
● Quiescent Current
800µA typ.
● Soft-Start Function
Internal : 16ms typ. or adjustable
● Dead Time Control
● Timer Latch for Short Circuit Protection
● C-MOS Technology
● Package Outline
NJU7631RB1 : MSOP8 (TVSP8)*
NJU7631
PWM/PFM
Light Load to Efficiency
NJU7630
PWM Control
** Planning
*MEET JEDEC MO-187-DA / THIN TYPE
■ PIN CONFIGURATION
1
8
2
7
3
6
4
5
NJU7631RB1
PIN FUNCTION
1. OUT
2. V⁺
3. FB
4. IN
5. SCP
6. DTC
7. RT
8. GND
Ver.2012-08-03
-1-