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JW5015B 데이터시트 PDF




JoulWatt에서 제조한 전자 부품 JW5015B은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 JW5015B 기능
기능 40V Synchronous Step-Down Converter
제조업체 JoulWatt
로고 JoulWatt 로고


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JW5015B 데이터시트, 핀배열, 회로
Parameters Subject to Change Without Notice
JW5015B
2A, 40V Synchronous
Step-Down Converter
FEATURES
3.6 V to 40 V operating input range
2A output current
Up to 94% efficiency
High efficiency (>78%) at light load
Internal Soft-Start
Fixed 100kHz Switching frequency
Input under voltage lockout
Low EMI noise
Available in thermally enhanced ESOP8
package
Current run-away protection
Short circuit protection
Thermal protection
APPLICATIONS
Distributed Power Systems
Car charger
FPGA, DSP, ASIC Power Supplies
Green Electronics/ Appliances
Networking Systems
Notebook Computers
DESCRIPTION
The JW5015B is a current mode monolithic buck
switching regulator. Operating with an input range
of 3.6V~40V, the JW5015B delivers 2A of
continuous output current with two integrated
N-Channel MOSFETs. The internal synchronous
power switches provide high efficiency without
the use of an external Schottky diode. At light
loads, the regulator operates in low frequency to
maintain high efficiency and low output ripple.
Current mode control provides tight load transient
response and cycle-by-cycle current limit.
The JW5015B guarantees robustness with
short-circuit protection, thermal protection,
start-up current run-away protection, and input
under voltage lockout.
The JW5015B is available in 8-pin ESOP
package, which provides a compact solution with
minimal external components. The package has
an exposed pad for low thermal resistance.
Company’s Logo is Protected, “JW ” and “JOULWATT” are Registered
Trademarks of JoulWatt technology Inc.
TYPICAL APPLICATION
5V/2A Step Down Regulators
100nF
Vin
5.1V TO 40V
100k
22uF
VIN BST
SW
EN JW5015B FB
47µH
68.1k
Vout
5V/2A
GND BIAS
2.2µF
13k 47µF
Efficiency vs Load Current
(Vout = 5V)
96
94
92
90
88
86
84
82
80
0
0.5 1 1.5
IoA
VIN=12V
VIN=24V
VIN=36V
2
JoulWatt Proprietary Information. Patent Protected.
Unauthorized Photocopy and Duplication Prohibited.
JW5015B Rev.0.83
1




JW5015B pdf, 반도체, 판매, 대치품
JW5015B
2A, 40V Synchronous Step-Down Converter
PIN DESCRIPTION
ESOP8
Pin
1
2
3
4
5
6
7
8
9
Name
SW
BST
BIAS
FB
NC
NC
EN
VIN
GND
Description
SW is the switching node that supplies power to the output. Connect the output LC filter from
SW to the output load.
Bootstrap pin for top switch. A 0.1uF or larger capacitor should be connected between this pin
and the SW pin to supply current to the top switch and top switch driver.
Output of the internal LDO. A capacitor of 2.2uF or larger should be connected at VD to
ground.
Output feedback pin. FB senses the output voltage and is regulated by the control loop to
800mV. Connect a resistive divider at FB.
Drive EN pin high to turn on the regulator and low to turn off the regulator.
Input voltage pin. VIN supplies power to the IC. Connect a 3.6V to 40V supply to VIN and
bypass VIN to GND with a suitably large capacitor to eliminate noise on the input to the IC.
Ground.
BLOCK DIAGRAM
Oscillator
Current
Ramp
CLK
+
0.8V
+
Error
+ Amplifier
FB -
3.3V LDO
1.2V
+
EN -
+
Current
Comparator
-
+
Current
Sensor
3.3V
-
Logic
Control
-
Current
Sensor
+
VIN
BST
SW
GND
JoulWatt Proprietary Information. Patent Protected.
Unauthorized Photocopy and Duplication Prohibited.
JW5015B Rev.0.83
4

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JW5015B 전자부품, 판매, 대치품
JW5015B
2A, 40V Synchronous Step-Down Converter
Thermal Protection
When the temperature of the JW5015B rises
above 135°C, it is forced into thermal
shut-down.
Only when core temperature drops below 120°C
can the regulator becomes active again.
JoulWatt Proprietary Information. Patent Protected.
Unauthorized Photocopy and Duplication Prohibited.
JW5015B Rev.0.83
7

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