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PDF NJW4152-AB Data sheet ( Hoja de datos )
| Número de pieza | NJW4152-AB | |
| Descripción | Switching Regulator IC | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJW4152-AB
Switching Regulator IC for Buck Converter
w/ 40V/1A MOSFET
GENERAL DESCRIPTION
The NJW4152 is a buck converter with 40V/1A MOSFET. It corresponds
to high oscillating frequency, and Low ESR Output Capacitor (MLCC) within
wide input range from 3.6V 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 automotive for 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-AB
FEATURES
Maximum Rating Input Voltage 45V
Wide Operating Voltage Range 3.6V to 40V @AB version
Switching Current
1.4A(min.) @AB version
PWM Control
Wide Oscillating Frequency
300kHz to 1MHz
Soft Start Function
4ms typ.
UVLO (Under Voltage Lockout)
Over Current Protection / Thermal Shutdown Protection
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Standby Function
Package Outline
NJW4152GM1: HSOP8
PRODUCT CLASSIFICATION
Status
Part Number
Version
Output
Current
MP NJW4152GM1-A
A 1.0A
MP NJW4152GM1-A-T
A 1.0A
MP NJW4152GM1-A-T1
A 1.0A
MP NJW4152GM1-AB
AB 1.0A
MP NJW4152GM1-AB-T1
AB
1.0A
MP NJW4152R-B
B 600mA
U.D. NJW4152R-BA-Z
BA 600mA
This data sheet is applied to "NJW4152GM1-AB".
Please refer to each data sheet for other versions.
Switching
Current Limit
(MIN.)
1.4A
Operating
Voltage
4.6 to 40V
1.4A
4.6 to 40V
1.4A
4.6 to 40V
1.4A 3.6 to 40V
1.4A
3.6 to 40V
0.8A
4.6 to 40V
0.8A
4.4 to 40V
Package
Operating
Temperature Range
HSOP8
HSOP8
HSOP8
HSOP8
HSOP8
MSOP8
(VSP8)
MSOP8
(VSP8)
General Spec.
-40 to +85°C
Automotive T Spec.
-40 to +105°C
Automotive T1 Spec.
-40 to +125°C
General Spec.
-40 to +85°C
Automotive T1 Spec.
-40 to +125°C
General Spec.
-40 to +85°C
Automotive Z Spec.
-40 to +125°C
Ver.2013-01-23
-1-
datasheet pdf - http://www.DataSheet4U.net/
1 page  
NJW4152-AB
TYPICAL APPLICATIONS
ON/OFF
High: ON
Low: OFF
(Standby)
RT
CIN2
432
RT ON/OFF V+
1
PV+
NJW4152
IN- FB GND SW
5678
RNF
CNF
CIN1
V IN
L COUT
SBD
CFB
RFB
V OUT
R2
R1
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Ver.2013-01-23
-5-
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
NJW4152-AB ApplicaNtiJoWn4M15a2n-uAaBl
Technical Information
2. Additional and Protection Functions / Features
Under Voltage Lockout (UVLO)
The UVLO circuit operating is released above V+=3.4V(typ.) and IC operation starts. When power supply voltage
is low, IC does not operate because the UVLO circuit operates. There is 100mV width hysteresis voltage at rise and
decay of power supply voltage. Hysteresis prevents the malfunction at the time of UVLO operating and releasing.
Soft Start Function (Soft Start)
The output voltage of the converter gradually rises to a set value by the soft start function. The soft start time is
4ms (typ). It is defined with the time of the error amplifier reference voltage becoming from 0V to 0.75V. The soft start
circuit operates after the release UVLO and/or recovery from thermal shutdown. The operating frequency is
controlled with a low frequency, approximately 40% of the set value by the timing resistor, until voltage of the IN- pin
becomes approximately 0.4V.
0.8V
V ref ,
IN- pin Voltage
FB pin Voltage
OSC Waveform
SW pin
ON
OFF
UVLO(3.4V typ.) Release,
Standby,
Recover from Thermal
Shutdow n
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Low Frequency
Control
VIN-=approx 0.4V
Soft Start time: Tss=4ms(typ.) to VB=0.75V
Soft Start effective period to VB=0.8V
Fig. 2. Startup Timing Chart
Steady
Operaton
Ver.2013-01-23
- 11 -
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet NJW4152-AB.PDF ] | |
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