Document
NJW4153
Switching Regulator IC for Buck Converter
Current Mode Control w/ 40V/1A MOSFET
GENERAL DESCRIPTION
The NJW4153 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 4.6V to 40V. Therefore, the NJW4153 can realize downsizing of applications with a few external parts so that adopts current mode control.
Also, it has a soft start function, an over current protection and a thermal shutdown circuit.
It is suitable for power supply circuit of Micro Processor, DSP and so on that need fast transient response.
FEATURES
Current mode Control
Maximum Rating Input Voltage 45V
Wide Operating Voltage Range 4.6V to 40V
Switching Current
1.4A min.
PWM Control
Built-in Compensation Circuit
Correspond to Ceramic Capacitor (MLCC)
Oscillating Frequency
1MHz typ. (A ver.)
Soft Start Function
4ms typ.
UVLO (Under Voltage Lockout)
Over Current Protection (Hiccup type)
Thermal Shutdown Protection
Standby Function
Package Outline
NJW4153U2 : SOT-89-5
NJW4153KV1 : ESON8-V1
■ PACKAGE OUTLINE NJW4153U2 NJW4153KV1
PRODUCT CLASSIFICATION
Part Number
Version
NJW4153U2-A NJW4153KV1-A
A A
Oscillation Frequency
1MHz typ.
1MHz typ.
Package SOT-89-5 ESON8-V1
Operating Temperature
Range
General Spec. -40°C to +85°C General Spec. -40°C to +85°C
Ver.2013-03-21
-1-
NJW4153
PIN CONFIGURATION
5 (2) 4
123
NJW4153U2
PIN FUNCTION 1. ON/OFF 2. GND 3. IN4. SW 5. V+
1 2 3 4
(Top View)
PIN FUNCTION
88
1 1. SW
77 66 55
2 2. N.C. 3 3. V+ 4 4. N.C.
5. ON/OFF
Exposed PAD on backside 6. GND
connect to GND.
7. N.C.
(Bottom View)
8. IN-
NJW4153KV1
BLOCK DIAGRAM
ON/OFF
High: ON Low : OFF
(Standby)
450kΩ
IN-
Standby ON/OFF
UVLO
Low Frequency Control
SLOPE COMP.
OSC
Soft Start
Vref 0.8V
ER⋅AMP
V+
CURRENT SENSE
OCP
SQ R
Buf f er
PWM
TSD
GND
SW
-2-
Ver.2013-03-21
NJW4153
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER
Supply Voltage V+- SW pin Voltage
SYMBOL V+
VV-SW
MAXIMUM RATINGS +45 +45
UNIT V V
IN- pin Voltage
VIN- -0.3 to +6
V
ON/OFF pin Voltage
VON/OFF
+45
V
SOT-89-5
625 (*1)
2,400 (*2)
Power Dissipation
PD ESON8-V1
600 (*3)
mW
1,800 (*4)
Junction Temperature Range
Tj
-40 to +150
°C
Operating Temperature Range
Topr
-40 to +85
°C
Storage Temperature Range
Tstg
-40 to +150
°C
(*1): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard size, 2Layers, Cu area 100mm2)
(*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)
(*3): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 2Layers FR-4, with Exposed Pad) (*4): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 4Layers FR-4, with Exposed Pad)
(For 4Layers: Applying 99.5×99.5mm inner Cu area and a thermal via hole to a b.