NJM2309 Datasheet, PDF (1/7 Pages) New Japan Radio – Switching Regulator Control IC for Step-Down

NJM2309
Switching Regulator Control IC for Step-Down
■GENERAL DESCRIPTION
The NJM2309 is a step-down Switching regulator IC with a
wide operating voltage range.
It features an open collector driver that can provide step-down
applications.
Internal soft-start function and timer latch function for short
circuit protection are included, requiring no external
components.
■PACKAGE OUTLINE
NJM2309M
( DMP8 )
NJM2309E
( SOP8 )
■FEATURES
● PWM switching control
● Operating Voltage
3.6V to 32V
● Wide Oscillator Range 5kHz to 500 kHz
● Duty Cycle
0% to 100%
● Soft Start function
● Timer Latch for Short Circuit Protection
● Under Voltage Lockouts (U.V.LO)
● Bipolar Technology
● Package Outline
NJM2309M
NJM2309E
NJM2309V
: DMP8
: SOP8 JEDEC 150mil
: SSOP8
■BLOCK DIAGRAM
NJM2309V
( SSOP8 )
REF
CT
CS
V⁺
8
7
6
5
30µA
V_REF
OSC
L.O
U.V.LO
0.52V
ER⋅AMP
PW M
S.C.P
PIN FUNCTION
1. IN ^-
2. F.B
3. GND
4. OUT
5. V ⁺
6. CS
7. CT
8. REF
1
2
3
4
IN^-
F.B
GND
OUT
Ver.2011-12-08
-1-