NJU7601 PDF даташит
Спецификация NJU7601 изготовлена «JRC» и имеет функцию, называемую «Switching Regulator IC / DMP8 / TVSP8». |
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Детали детали
Номер произв | NJU7601 |
Описание | Switching Regulator IC / DMP8 / TVSP8 |
Производители | JRC |
логотип |
9 Pages
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NJU7601
Step-Up/Flyback Switching Regulator IC with Power Saving PWM/PFM control
■GENERAL DESCRIPTION
NJU7601 is a high speed low voltage operation switching
regulator control IC with power saving PWM/PFM control.
Automatic PWM/PFM control improves power efficiency at light
load. It features a totem pole driver that can directly drive an
external MOS-FET.
Internal soft-start function, dead time control and timer latch
function are included, requiring no external components. All
parameters can be optimized by additional external components
for design flexibility.
■PACKAGE OUTLINE
NJU7601M
NJU7601RB1
■FEATURES
● Automatic PWM/PFM Control
● Operating Voltage
2.2V to 8V
● Wide Oscillator Range
300kHz to 1MHz
● Maximum Duty Cycle
90% typ.
● 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
NJU7600M : DMP8
NJU7600RB1 : TVSP8
■PRODUCT VARIATION
NJU760x**
Standby Function
PWM/PFM
NJU7601
PWM/PFM
Light Load to Efficiency
NJU7600
PWM Control
** Planning
■PIN CONFIGURATION
1
2
3
4
NJU7601M
NJU7601RB1
8
7
6
5
PIN FUNCTION
1. V+
2. FB
3. IN-
4. SCP
5. DTC
6. RT
7. GND
8. OUT
Ver.2006-01-04
-1-
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NJU7601
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■BLOCK DIAGRAM
FB
IN-
1V Vref
V+
ER⋅AMP
Soft Start
Latch
UVLO
SCP
1V
2µA
SCP
2kΩ
1V
0.5
RT
A
DTC
0.8V
0.2V
PWM/PFM
Control
OSC
0.5V
PWM
Buffer
OUT
0.74V
RT
RT
GND
-2-
Ver.2006-01-04
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www.DataSheet4U.com
■ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
Supply Voltage
Output Pin Current
Power Dissipation
SYMBOL
V+
IO
PD
Operating Temperature Range
Storage Temperature Range
TOPR
TSTG
MAXIMUM RATINGS
+9
±50
DMP8 :300
TVSP8 :320
-40 ~ +85
-40 ~ +125
UNIT
V
mA
mW
°C
°C
NJU7601
■RECOMMENDED OPERATING CONDITIONS (Ta=25°C)
PARAMETER
Operating Voltage
Oscillator Timing Resistor
Oscillation Frequency
SYMBOL
V+
RT
fOSC
MIN.
2.2
30
300
TYP.
–
47
700
MAX.
8
120
1,000
UNIT
V
kΩ
kHz
■ELECTRICAL CHARACTERISTICS (V+=3.3V, RT=47kΩ, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Hysteresis Voltage
Soft Start Block
Soft Start Time
Short Circuit Protection Block
Input Threshold Voltage
Charge Current
Latch Mode
ON Threshold Voltage
Latch Mode
OFF Threshold Voltage
Oscillator Block
RT Pin Voltage
Oscillation Frequency
Oscillate Supply Voltage
Fluctuations
Oscillate Temperature
Fluctuations
VT_ON
VT_OFF
VHYS
V+= L → H
V+= H → L
TSS VT_ON → Duty=80%
VT_PC
ICHG
VT_LA
FB Pin
VSCP=0V
SCP Pin
VT_LAOFF SCP Pin
VRT
fOSC
fDV V+=2.2V ~ 8V
fDT Ta=-40°C ~ +85°C
MIN. TYP. MAX. UNIT
1.9 2.0 2.1 V
1.8 1.9 2.0 V
60 100
– mV
8 16 24 ms
0.95 1.00 1.05 V
1.5 2 2.5 µA
0.95 1.00 1.05 V
0.2 0.45 0.7 V
-5% 0.5 +5% V
630 700 770 kHz
– 1 –%
– 3 –%
Ver.2006-01-04
-3-
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