NJM2360
A
-
1
-
Ver.2007-06-08
HIGH PRECISION DC/DC CONVERTER CONTROL IC
■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE
The NJM2360A is a control circuit containing the primary functions
required for DC to DC CONVERTOR.
This device consist of high precision reference, comparator
controlled duty cycle oscillator with an active current limit circuit,
driver and high current output switch.
This IC was specifically designed to be incorporated in step-up,
step-down and inverting applications with a minimum number of
external components. This IC is designed to be ±5% output voltage
by using precision 1% resistance on external detected resistance.
■ FEATURES
• Precision Reference 1.25V±2%
• Output Switch Current 1.5A (MAX)
• Operating Voltage 2.5V* to 40V
• Internal Over Current Limit Circuit
• Supply Voltage V+ 2.5V* to 40V
• Output Voltage VOR 1.25V to 40V
• Oscillator Frequency fOSC 100Hz to 100kHz
• Package Outline DIP8, DMP8
*Ta =25°C. At low temperature, the minimum voltage is 3.0V.
■ PIN CONFIGURATION
■ BLOCK DIAGRAM
NJM2360AD NJM2360AM
NJM2360AD
NJM2360AM
NJM2360A
-
2
-Ver.2007-06-08
■ ABSOLUTE MAXIMUM RATINGS (Ta = 25ºC)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage V+ 40 V
Comparator Input Voltage Range VIR -0.3 to 40 V
Power Dissipation PD (DIP8) 875
(DMP8) 750 (note1)
mW
mW
Switch Current ISW 1.5 A
Operating Temperature Range Topr -40 to + 85 ºC
Storage Temperature Range Tstg -40 to +150 ºC
(note 1) At on PC board
■ ELECTRICAL CHARACTERISTICS
● DC Characteristics (V+ = 5V, Ta = 25ºC)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Operating Current ICC 5V ≤ V+ ≤ 40V, CT = 0.001µF
S1 = V+, INVIN > Vth, ES = GND - 2.4 3.5 mA
Oscillator
Charge Current Ichg 5V ≤ V+ ≤ 40V 20 35 50 µA
Discharge Current Idischg 5V ≤ V+ ≤ 40V 150 200 250 µA
Voltage Swing VOSC - 0.5 - VP-P
Discharge to Charge Current Ratio Idischg/Ichg S
I = V+ - 6 - -
Peak Current Sense Voltage VIPK(sense) I
chg = Idischg 250 300 350 mV
Output Switch (Note 2)
Saturation Voltage 1 VCE(sat) 1 Darlington Connection (CS = CD)
ISW = 1.0A - 1.0 1.3 V
Saturation Voltage 2 VCE(sat) 2 ISW = 1.0A, IC (driver) = 50mA
(Forced β=20) - 0.5 0.7 V
DC Current Gain hFE I
SW = 1.0A, VCE = 5.0V 35 120 - -
Collector Off-State Current IC(off) V
CE = 40V - 10 - nA
Comparator
Threshold Voltage Vth 1.225 1.250 1.275 V
Input Bias Current IIB V
IN = OV - 40 400 nA
Note 2 : Output switch tests are performed under pulsed conditions to minimize power dissipation.
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
