NJU7640 Datasheet, PDF (1/10 Pages) New Japan Radio – Step-Down switching regulator IC with Over Current Protection

NJU7640
Step-Down switching regulator IC with Over Current Protection
■ GENERAL 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.
■ FEATURES
● PWM switching control
● Pulse-by-pulse over current protection
● Operating Voltage
2.2V to 8V
● Wide Oscillator Range 300kHz to 1MHz
● Maximum Duty Cycle 100%
● Quiescent Current
800µA typ.
● Soft-Start Function
Internal : 16ms typ. or adjustable
● Dead Time Control
● C-MOS Technology
● Package Outline
NJU7640RB1 : MSOP8 (TVSP8)*
*MEET JEDEC MO-187-DA / THIN TYPE
■ PACKAGE OUTLINE
NJU7640RB1
(MSOP8 (TVSP8))
■ PRODUCT VARIATION
NJU7650
Constant Current Control
NJU7640
Over Current Protection
NJU7630
PWM Control
■ PIN CONFIGURATION
1
8
2
7
3
6
4
5
NJU7640RB1
PIN FUNCTION
1. OUT
2. V⁺
3. FB
4. IN-
5. SENSE
6. DTC
7. RT
8. GND
Ver.2012-08-03
-1-