NJW4196
Internal 3.5A MOSFET Switching Regulator IC for Buck Converter
GENERAL DESCRIPTION
■ PACKAGE OUTLINE
The NJW4196 is a buck converter with 40V/3.5A MOSFET.
The transient response when a supply voltage rises from a reduced
voltage is improved than conventional current mode products,
therefore the NJW4196 provides stable regulation characteristic even
if application which an operating voltage fluctuates.
External Clock Synchronization function synchronizes oscillating
frequency with external clock input.
Also, it has a soft start function, an external clock synchronization,
an over current protection and a thermal shutdown circuit.
It is suitable for supplying power to a Car Accessory, Office
Automation Equipment, Industrial Instrument and so on.
NJW4196GM1
FEATURES
Fast supply voltage transient response from a reduced voltage
External Clock Synchronization
Wide Operating Voltage Range
4.45V to 40V
Switching Current
5A min.
Oscillating Frequency
A ver. Fixed 450kHz typ.
J ver . Adjustable TBD(100kHz) to TBD
PWM Control
Maximum Duty Cycle 100%
Correspond to Ceramic Capacitor (MLCC)
Adjustable Soft Start Function
UVLO (Under Voltage Lockout)
Over Current Protection (Hiccup type)
Thermal Shutdown Protection
Power Good Function
Standby Function
Package Outline
NJW4196GM1 : HSOP8
PRODUCT CLASSIFICATION
Part Number
Version
NJW4196GM1-A
A
NJW4196GM1-J
(U.D.)
J
Ver.2015-10-14
Oscillating
Frequency
Fixed
450kHz typ.
Adjustable
TBD(100kHz) to TBD
Operating
Temperature Range
General Spec.
-40 C to +125 C
General Spec.
-40 C to +125 C
-1-
NJW4196
PIN CONFIGURATION
SW
1
8
V+
SW
1
8
V+
GND
2
7
N.C.
GND
2
7
EN/SYNC
SS
3
6
EN/SYNC
SS
3
6
PG
FB
4
5
PG
FB
4
5
RT
Exposed PAD on
backside connect to GND
Exposed PAD on
backside connect to GND
NJW4196GM1-J
(U.D.)
NJW4196GM1-A
PIN DESCRIPTIONS
PIN NAME
SW
GND
PIN NUMBER
J version
A version
(U.D.)
1
1
2
2
FUNCTION
SS
3
3
FB
4
4
RT
–
5
PG
5
6
EN/SYNC
6
7
N.C.
7
–
V+
Exposed
PAD
8
8
Switch Output pin of Power MOSFET
GND pin
Soft Start timer setting pin.
Soft start time is set by an external capacitor.
Output Voltage Detecting pin
Connects output voltage through the resistor divider tap to this pin in
order to voltage of the FB pin become 1V.
Oscillating Frequency Setting pin with an external Timing Resistor.
Oscillating Frequency should set between TBD(100kHz) and TBD.
(Only J version)
Power Good pin. An open drain output that goes high impedance
when the FB pin voltage is stable around 15%.
Standby Control pin
The EN/SYNC pin internally pulls down with 500k . Normal
Operation at the time of High Level. Standby Mode at the time of
Low Level or OPEN.
Moreover, it operates by inputting clock signal at the oscillatory
frequency that synchronized with the input signal.
Non Connection
(Only A version)
Power Supply pin for Power Line
–
–
Connect to GND
-2-
Ver.2015-10-14
NJW4196
BLOCK DIAGRAM
V+
CURRENT
SENSE
SLOPE
COMP.
UVLO
EN/SYNC
High: ON
Low: OFF(Standby)
OCP
Enable
(Standby)
S Q
Buffer
R
(J ver. only)
SYNC
TSD
OSC
SW
RT
Buffer
FB
PWM
GND
PG
Power Good
Control Logic
Soft Start
Vref
PEAK
HOLD
SS
Ver.2015-10-14
-3-
NJW4196
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V+
+
V - SW pin Voltage
VV-SW
FB pin Voltage
VFB
PG pin Voltage
VPG
EN/SYNC pin Voltage
VEN/SYNC
Power Dissipation
PD
Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
Tj
Topr
Tstg
MAXIMUM RATINGS
-0.3～+45
+45
-0.3～+6
-0.3～+6
-0.3～+45
HSOP8
860 (*1)
2,900 (*2)
-40 to +150
-40 to +125
-50 to +150
(Ta=25°C)
UNIT
V
V
V
V
V
mW
C
C
C
(*1): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers)
(*2): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers)
(For 4Layers: Applying 74.2×74.2mm inner Cu area and a thermal via hall to a board based on JEDEC standard JESD51-5)
Depending on conditions of the application, NJW4196 may not apply a max output current of it by a limit of the power
consumption.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
Supply Voltage
V+
Power Good pin Voltage
VPG
Timing Resistor (*3)
RT
Oscillating Frequency (*3)
fOSC
MIN.
4.45
0
TBD
TBD
(100)
TYP.
–
–
－
MAX.
40
5.5
TBD
UNIT
V
V
k
–
TBD
kHz
440
0.9×fosc
–
–
600
1.3 fosc
kHz
External Clock Input Range
A version
J version (U.D.)
fSYNC
(*3): Apply only the J version.
-4-
Ver.2015-10-14
NJW4196
ELECTRICAL CHARACTERISTICS
(Unless otherwise noted, V+=VEN./SYNC=12V, Ta=25 C, J version: RT=TBD k )
PARAMETER
SYMBOL
Under Voltage Lockout Block
ON Threshold Voltage
OFF Threshold Voltage
Hysteresis Voltage
VT_ON
VT_OFF
VHYS
Soft Start Block
Charge Current
Oscillator Block
Oscillating Frequency (*4)
Oscillating Frequency 1 (*5)
Oscillating Frequency 2 (*5)
Oscillating Frequency
deviation (Supply voltage)
Oscillating Frequency
deviation (Temperature)
(*4): A version
(*5): J version (U.D.)
Buffer Block
Reference Voltage
Threshold Voltage
Input Bias Current
PWM Comparate Block
Maximum Duty Cycle
Minimum ON Time
fOSC_A
fOSC1_J
fOSC2_J
RT=TBDk
RT=TBDk
MIN.
TYP.
MAX.
UNIT
4.05
4.0
70
4.25
4.15
100
4.45
4.3
－
V
V
mV
3.5
4.0
4.5
A
405
270
TBD
450
300
TBD
495
330
TBD
kHz
kHz
kHz
fDV
V+=4.45V to 40V
–
1
–
%
fDT
Ta=-40 C to +85 C
–
5
–
%
-1.0%
-2.0%
-0.1
1
1
–
+1.0%
+2.0%
0.1
V
V
A
–
–
–
125
100
185
%
ns
–
75
–
ms
–
5
–
0.125
6.5
–
0.25
8
5
A
A
VB
VTH
IB
MAXDUTY
tON-min
tCOOL
Output Block
Output ON Resistance
Switching Current Limit
SW Leak Current
RON
ILIM
ILEAK
Ver.2015-10-14
V+= L → H
V+= H → L
ICHG
OCP Block
COOL DOWN Time
Standby Control / Sync Block
EN/SYNC pin
High Threshold Voltage
EN/SYNC pin
Low Threshold Voltage
Input Bias Current
(EN/SYNC pin)
TEST CONDITION
ISW=3A
VFB=0.9V
ISW=3A
VEN/SYNC=0V, V+=40V, VSW=0V
VTHH_EN/SYNC
VEN/SYNC= L → H
1.6
–
V+
V
VTHL_EN/SYNC
VEN/SYNC= H → L
0
–
0.5
V
VEN/SYNC=12V
–
235
340
IEN/SYNC
A
-5-
NJW4196
ELECTRICAL CHARACTERISTICS
(Unless otherwise noted, V+=VEN./SYNC=12V, Ta=25 C, J version: RT=TBD k )
PARAMETER
SYMBOL
Power Good Block
High Level Detection Voltage
Low Level Detection Voltage
Hysterisis Region
Power Good ON Resistance
Leak Current at OFF State
VTHH_PG
VTHL_PG
VHYS_PG
RON_PG
ILEAK_PG
General Characteristics
Quiescent Current
Standby Current
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
110
80
–
–
–
115
85
2
45
–
120
90
–
60
0.1
A
–
–
3.5
–
4.2
3
mA
A
Measured at FB pin
Measured at FB pin
IPG=10mA
VPG=6V
IDD
RL=no load, VFB=0.9V
VEN/SYNC=0V
IDD_STB
THERMAL CHARACTERISTICS
PARAMETER
SYMBOL
Junction-to-ambient
ja
thermal resistance
Junction-to-Top of package
jt
characterization parameter
VALUE
145 (*6)
43 (*7)
28 (*6)
12 (*7)
UNIT
C/W
C/W
(*6): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers)
(*7): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers)
(For 4Layers: Applying 74.2×74.2mm inner Cu area and a thermal via hall to a board based on JEDEC standard JESD51-5)
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJW4196GM1 (HSOP8 Package)
Power Dissipation vs. Ambient Temperature
(Tj=~150°C)
Power Dissipation PD (mW)
3000
At on 4 layer PC Board (*7)
At on 2 layer PC Board (*6)
2500
2000
1500
1000
500
0
-50
-25
0
25
50
75
100
125
150
Ambient Temperature Ta (°C)
-6-
Ver.2015-10-14
NJW4196
TYPICAL APPLICATIONS
L
VIN
CIN
SBD
V+
EN/SYNC
High: ON
Low: OFF (Standby)
Power Good
EN/
SYNC
PG
SS
RT
COUT
CFB
SW
NJW4196
VOUT
R2
FB
GND
R1
CSS
RT
C1
(J ver. only)
Ver.2015-10-14
-7-
NJW4196
TYPICAL CHARACTERISTICS (A, J version)
Reference Voltage vs. Supply Voltage
(Ta=25ºC)
5
Quiescent Current :IDD (mA)
Reference Voltage :VB (V)
1.01
Quiescent Current vs. Supply Voltage
(RL=no load, VFB=0.9V, Ta=25ºC)
1.005
1
0.995
4
3
2
1
0
0.99
0
10
20
30
Supply Volatage :V+ (V)
0
40
Reference Voltage vs. Temperature
(V+=12V)
1.01
10
20
30
Supply Volatage :V+ (V)
40
Threshold Voltage vs. Temperature
(V+=12V, ISW=3A)
1.02
Threshold Voltage :VTH (V)
Reference Voltage :VB (V)
1.015
1.005
1
0.995
1.01
1.005
1
0.995
0.99
0.985
0.99
0.98
-50
-25
0
25 50 75 100 125 150
Temperature : (ºC)
Charge Current vs. Temperature
(V+=12V)
4.5
4.3
4.2
4.1
4
3.9
3.8
3.7
3.6
3.5
-25
0
25 50 75 100 125 150
Temperature : (ºC)
Minimum ON Time vs. Temperature
(V+=12V)
200
Minimum ON Time :ton_min (ns)
Charge Current :ICHG (μA)
4.4
190
180
170
160
150
140
130
120
110
100
-50
-8-
-50
-25
0
25 50 75 100 125 150
Temperature : (ºC)
-50
-25
0
25 50 75 100 125 150
Temperature : (ºC)
Ver.2015-10-14
NJW4196
TYPICAL CHARACTERISTICS (A, J version)
Output ON Resistance vs. Temperature
(ISW=3A)
0.2
V+=5V
V+=40V
V+=12V
0.15
0.1
0.05
9
Switching Current Limit :ILIM (A)
Output ON Resistance :Ron (Ω)
0.25
0
Switching Current Limit vs. Temperature
8.5
V+=40V
V+=12V
V+=5V
8
7.5
7
6.5
6
5.5
5
4.5
4
-50
-25
0
25 50 75 100 125 150
Temperature : (ºC)
-50
Under Voltage Lockout Voltage vs. Temperature
4.5
-25
0
25 50 75 100 125 150
Temperature : (ºC)
Quiescent Current vs. Temperature
(RL=no load, VFB=0.9V)
4.2
4.3
VT_ON
4.2
VT_OFF
4.1
Quiescent Current :IDD (mA)
Threshold Voltage : (V)
4
4.4
3.8
3.6
V+=40V, 12V
3.4
3.2
V+=4.4V
3
2.8
2.6
2.4
2.2
4
-50
0
-50
25 50 75 100 125 150
Temperature : (ºC)
Standby Current vs. Temperature
(VEN/SYNC=0V)
9
8
7
6
5
V+=40V
4
3
2
V+=4.4V
1
V+=12V
0
10
Switching Leak Current :ILEAK (μA)
10
Standby Current :IDD_STB (μA)
-25
-25
0
25 50 75 100 125 150
Temperature : (ºC)
Switching Leak Current vs. Temperature
(V+=40V, VEN/SYNC=0V, VSW=0V)
9
8
7
6
5
4
3
2
1
0
-50
Ver.2015-10-14
-25
0
25 50 75 100 125 150
Temperature : (ºC)
-50
-25
0
25 50 75 100 125 150
Temperature : (ºC)
-9-
NJW4196
TYPICAL CHARACTERISTICS (A version)
Oscillating Frequency vs. Supply Voltage
(Ta=25ºC)
500
Oscillating Frequency :fOSC (kHz)
Oscillating Frequency :fOSC (kHz)
470
465
460
455
450
445
440
435
430
490
480
470
460
450
440
430
420
410
400
0
- 10 -
Oscillating Frequency vs. Temperature
(V+=12V)
10
20
30
Supply Volatage :V+ (V)
40
-50
-25
0
25 50 75 100 125 150
Temperature : (ºC)
Ver.2015-10-14
NJW4196
MEMO
[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.
Ver.2015-10-14
- 11 -