NJU7606
Step-Up / Flyback Switching Regulator IC with Load Switch Function
■GENERAL
DESCRIPTION
The NJU7606 are low voltage operation high speed switching
regulator control ICs for step-up and flyback converter, with a load
switch function.
The load switch function can disrupt the current flow to the load in
standby mode and latch mode. The NJU7606 also have a soft-start
function, dead time control and timer latch for short circuit protection
and their times are all adjustable with external parts. The NJU7606
is available in 10-lead MSOP (TVSP) package.
They are suitable for battery powered applications.
■PACKAGE
OUTLINE
NJU7606RB2
(MSOP10(TVSP10))
■FEATURES
●
PWM switching control
●
Load Switch Function
●
Operating Voltage
●
Wide Oscillator Range
●
Maximum Duty Cycle
●
Quiescent Current
■PRODUCT
VARIATION
●
Soft-Start Function
●
Dead Time Control
●
Timer Latch for Short Circuit Protection
●
C-MOS Technology
●
Package Outline
NJU7606RB2 : MSOP10 (TVSP10)*
*MEET JEDEC MO-187-DA / THIN TYPE
2.2V to 8V
300kHz to 1MHz
90% typ.
Operating: 800µA typ.
Standby: 1µA max.
Internal : 16ms typ. or adjustable
NJU7606
Load SW,
Standby Function
NJU7602
Standby Function
■PIN
CONFIGURATION
1
2
3
4
5
10
9
8
7
6
NJU7606RB2
PIN FUNCTION
1. V
+
2. LSW
3. FB
4. IN-
5. SCP
6. ON/OFF
7. DTC
8. RT
9. GND
10. OUT
Ver.2012-08-01
-1-
NJU7606
■ABSOLUTE
MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V
+
LSW Output Voltage
V
LSW
Output Pin Current
I
O
LSW Output Current
I
LSW
ON/OFF Pin Voltage
V
ON/OFF
Power Dissipation
P
D
Operating Temperature Range
T
OPR
Storage Temperature Range
T
STG
(Ta=25°C)
MAXIMUM RATINGS
UNIT
+9
V
+9
V
mA
±50
-10
mA
+9 (*1)
V
320
mW
-40 to +85
°C
-40 to +125
°C
*1: When input voltage is less than 9V, the absolute maximum control voltage is equal to the input voltage.
■RECOMMENDED
OPERATING CONDITIONS
PARAMETER
SYMBOL
Operating Voltage
V
+
Oscillator Timing Resistor
R
T
Oscillation Frequency
f
OSC
MIN.
2.2
30
300
TYP.
–
47
700
MAX.
8
120
1,000
(Ta=25°C)
UNIT
V
kΩ
kHz
■ELECTRICAL
CHARACTERISTICS
PARAMETER
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
SYMBOL
(V
+
=V
ON/OFF
=3.3V, R
T
=47kΩ, Ta=25°C)
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
V
T_ON
V
T_OFF
V
HYS
V
+
= L
→
H
V
+
= H
→
L
1.9
1.8
60
2.0
1.9
100
2.1
2.0
–
V
V
mV
T
SS
V
T_ON
→
Duty=80%
8
16
24
ms
V
T_PC
I
CHG
V
T_LA
V
T_LAOFF
FB Pin
V
SCP
=0V
SCP Pin
SCP Pin
0.95
1.5
0.95
0.2
1.00
2
1.00
0.45
1.05
2.5
1.05
0.7
V
µA
V
V
V
RT
f
OSC
f
DV
f
DT
V
+
=2.2V to 8V
Ta=-40°C to +85°C
-5%
630
–
–
0.5
700
1
3
+5%
770
–
–
V
kHz
%
%
Ver.2012-08-01
-3-
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