NJW4152
Switching Regulator IC for Buck Converter
w/ 40V/1A or 40V/600mA MOSFET
GENERAL DESCRIPTION
The
NJW4152
is a buck converter with
40V/1A
or
40V/600mA
MOSFET. It corresponds to high oscillating frequency, and Low
ESR Output Capacitor (MLCC) within wide input range from 4.6V
to 40V. Therefore, the
NJW4152
can realize downsizing of an
application with a few external parts.
Also, it has a soft start function, an over current protection and a
thermal shutdown circuit. Moreover there is an extended operating
temperature range version.
It is suitable for logic voltage generation from high voltage that
Car Accessory, Office Automation Equipment, Industrial
Instrument and so on.
■
PACKAGE OUTLINE
NJW4152GM1-A
NJW4152GM1-A-T
NJW4152R-B
FEATURES
Maximum Rating Input Voltage
Wide Operating Voltage Range
Switching Current
45V
4.6V to 40V
1.4A(min.) @A version
0.8A(min.) @B version
Correspond to Operating Temperature 105°C (extended operating temperature ver.)
PWM Control
Wide Oscillating Frequency
300kHz to 1MHz
Soft Start Function
4ms typ.
UVLO (Under Voltage Lockout)
Over Current Protection / Thermal Shutdown Protection
Standby Function
Package Outline
NJW4152GM1: HSOP8
NJW4152R: VSP8
PRODUCT CLASSFICATION
PART NUMBER
NJW4152GM1-A
NJW4152GM1-A-T
NJW4152R-B
VERSION
A
A
B
OUTPUT
CURRENT
1.0A
1.0A
0.6A
SWITCHING
CURRENT LIMIT
(MIN.)
1.4A
1.4A
0.8A
PACKAGE
HSOP8
HSOP8
VSP8
OPERATING
TEMPERATURE
RANGE
-40°C to +85°C
-40°C to +105°C
-40°C to +85°C
Ver.2011-09-03
-1-
NJW4152
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V
+
(V
+
pin, PV
+
pin)
PV
+
- SW pin Voltage
V
PV-SW
IN- pin Voltage
V
IN-
ON/OFF pin Voltage
V
ON/OFF
(Ta=25°C)
UNIT
V
V
V
V
MAXIMUM RATINGS
+45
+45
-0.3 to +6
+45
790 (*1)
HSOP8
2,500 (*2)
595 (*1)
805 (*2)
-40 to +150
Standard
(VSP8,
-40 to +85
HSOP8)
Extended
-40 to +105
(HSOP8)
-40 to +150
VSP8
Power Dissipation
P
D
mW
Junction Temperature Range
Operating Temperature Range
Tj
T
opr
T
stg
°C
°C
°C
Storage Temperature Range
(*1): Mounted on glass epoxy board. (76.2×114.3×1.6mm:EIA/JDEC standard size, 2Layers)
(*2): Mounted on glass epoxy board. (76.2×114.3×1.6mm:EIA/JDEC standard size, 4Layers),
internal Cu area: 74.2×74.2mm
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
Supply Voltage
V
+
A version
Output Current (*3)
I
OUT
B version
Timing Resistor
R
T
Oscillating Frequency
fosc
(*3): At Static Status
MIN.
4.6
–
–
18
300
TYP.
–
–
–
27
700
MAX.
40
1.0
0.6
68
1,000
UNIT
V
A
A
kΩ
kHz
Ver.2011-09-03
-3-
NJW4152
ELECTRICAL CHARACTERISTICS1
PARAMETER
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Hysteresis Voltage
Soft Start Block
Soft Start Time
Oscillator Block
Oscillation Frequency
Oscillation Frequency
(Low Frequency Control)
RT pin Voltage
Oscillation Frequency
deviation (Supply voltage)
Oscillation Frequency
deviation (Temperature)
Error Amplifier Block
Reference Voltage
Input Bias Current
Open Loop Gain
Gain Bandwidth
Output Source Current
Output Sink Current
PWM Comparate Block
Maximum Duty Cycle
Output Block
Output ON Resistance
Switching Current Limit
Switching Leak Current
ON/OFF Block
ON Control Voltage
OFF Control Voltage
Pull-down Resistance
General Characteristics
Quiescent Current
Standby Current
R
ON
I
LIM
I
LEAK
A version, I
SW
=1A
B version, I
SW
=0.6A
A version
B version
V
ON/OFF
=0V, V
+
=45V, V
SW
=0V
–
–
1.4
0.8
–
0.3
0.28
1.7
1.0
–
0.5
0.48
2.0
1.3
1
Ω
Ω
A
A
µA
SYMBOL
(Unless otherwise noted, V
+
=V
ON/OFF
=12V, R
T
=27kΩ, Ta=25°C)
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
V
T_ON
V
T_OFF
V
HYS
V
+
= L
→
H
V
+
= H
→
L
4.3
4.2
60
4.5
4.4
100
4.6
4.54
–
V
V
mV
T
SS
V
B
=0.75V
2
4
8
ms
f
OSC
f
OSC_LOW
V
RT
f
DV
f
DT
V
+
=4.6 to 40V
Ta=-40°C to +85°C
V
IN-
=0.4V, V
FB
=0.55V
630
–
0.24
–
–
700
270
0.275
1
2
770
–
0.31
–
–
kHz
kHz
V
%
%
V
B
I
B
A
V
G
B
I
OM+
I
OM-
V
FB
=1V, V
IN-
=0.7V
V
FB
=1V, V
IN-
=0.9V
-1.0%
-0.1
–
–
8
1
0.8
–
80
0.6
16
2
+1.0%
+0.1
–
–
24
4
V
µA
dB
MHz
µA
mA
M
AX
D
UTY
V
IN-
=0.7V
100
–
–
%
V
ON
V
OFF
R
PD
V
ON/OFF
= L
→
H
V
ON/OFF
= H
→
L
1.6
0
–
–
–
480
V
+
0.5
–
V
V
kΩ
I
DD
I
DD_STB
R
L
=no load, V
IN-
=0.7V, V
FB
=0.55V
V
ON/OFF
=0V
–
–
2.5
–
2.8
1
mA
µA
-4-
Ver.2011-09-03
NJW4152
ELECTRICAL CHARACTERISTICS2
PARAMETER
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Hysteresis Voltage
Soft Start Block
Soft Start Time
Oscillator Block
Oscillation Frequency
RT pin Voltage
Error Amplifier Block
Reference Voltage
Input Bias Current
Output Source Current
Output Sink Current
PWM Comparate Block
Maximum Duty Cycle
Output Block
Switching Leak Current
ON/OFF Block
ON Control Voltage
OFF Control Voltage
General Characteristics
Quiescent Current
Standby Current
SYMBOL
(Unless otherwise noted, V
+
=V
ON/OFF
=12V, R
T
=27kΩ, Ta=-40 to 105°C)
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
V
T_ON
V
T_OFF
V
HYS
V
+
= L
→
H
V
+
= H
→
L
4.3
4.2
60
–
–
–
4.6
4.54
–
V
V
mV
T
SS
V
B
=0.75V
2
–
8
ms
f
OSC
V
RT
630
0.24
–
–
770
0.31
kHz
V
V
B
I
B
I
OM+
I
OM-
V
FB
=1V, V
IN-
=0.7V
V
FB
=1V, V
IN-
=0.9V
-2%
-0.1
8
0.5
–
–
–
–
+2%
0.1
24
4.5
V
µA
µA
mA
M
AX
D
UTY
V
IN-
=0.7V
100
–
–
%
I
LEAK
V
ON/OFF
=0V, V
+
=45V, V
SW
=0V
–
–
1
µA
V
ON
V
OFF
V
ON/OFF
= L
→
H
V
ON/OFF
= H
→
L
1.6
0
–
–
V
+
0.5
V
V
I
DD
I
DD_STB
R
L
=no load, V
IN-
=0.7V, V
FB
=0.55V
V
ON/OFF
=0V
–
–
–
–
3.5
1
mA
µA
Ver.2011-09-03
-5-
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