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NJM2309

New Japan Radio
Part Number NJM2309
Manufacturer New Japan Radio
Description Switching Regulator Control IC
Published May 26, 2016
Detailed Description NJM2309 Switching Regulator Control IC for Step-Down ■GENERAL DESCRIPTION The NJM2309 is a step-down Switching regulat...
Datasheet PDF File NJM2309 PDF File

NJM2309
NJM2309

Overview
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 8 VREF U.
V.
LO CT 7 30µA OSC CS 6 L.
O 0.
52V ER⋅AMP PW M S.
C.
P V+ 5 PIN FUNCTION 1.
IN 2.
F.
B 3.
GND 4.
OUT 5.
V + 6.
CS 7.
CT 8.
REF 1234 IN- F.
B GND OUT Ver.
2011-12-08 -1- NJM2309 ■ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage Out pin Voltage Reference Output Current Output Current SYMBOL V+ VO_PIN IOR IO Power Dissipation PD Operating Temperature Range Storage Temperature Range Topr Tstg (Ta=25°C) MAXIMUM RATINGS UNIT 36 36 10 200 DMP8 : 375 SOP8 : 375 SSOP8 : 312 V V mA mA mW -40 ~ +85 -50 ~ 150 °C °C ■RECOMMENDED OPERATING CONDITIONS PARAMETER Operating Voltage SYMBOL V+ OUT pin Voltage Feed Back Resistor Oscillator Timing Capacitor Oscillator Timing Resistor Oscillation Frequency VO_PIN RNF CT RT fOSC MIN.
3.
6 – 100 220 10 5 (V+=6V, Ta=25°C) MAX.
UNIT 32 V 32 V – 22,000 kΩ pF 100 kΩ 500 kHz ■ELECTRICAL CHARACTERISTICS (V+=6V, RT=33kΩ, CT=1,000pF, Ta=25°C) REFERENCE VOLTAGE BLOCK PARAMETER SYMBOL RATINGS Output Voltage Line Regulation Load Regulation VREF LINE LOAD IOR=1mA V+=3.
6V ~ 32V, IOR=1mA IOR=0.
1mA ~ 5.
0mA MIN.
TYP.
MAX.
UNIT 2.
45 2.
50 2.
55 V – 6.
8 20.
7 mV – 5 30 mV OSCILLATOR BLOCK PARAMETER SYMBOL ...


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