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LM43603DSUT 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
封装:
VSON EP-16
描述:
3.5V 至 36V、3A 同步降压转换器 16-SON -40 to 125
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3Hot
典型应用电路图在P24P25P26
原理图在P1P14P15P20P22P24P25P29
封装尺寸在P45P47P48P49
焊盘布局在P42P50
标记信息在P45
封装信息在P44P45P46P47P48
技术参数、封装参数在P4
应用领域在P1P24P25P26
电气规格在P4P5P6
导航目录
LM43603DSUT数据手册
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0
10
20
30
40
50
60
70
80
0 200 400 600 800 1000
Radiated EMI Emissions (dBµV/m)
Frequency (MHz)
Evaluation Board
EN 55022 Class B Limit
EN 55022 Class A Limit
C001
C001
SWVIN
PGND
CBOOT
VCC
BIAS
SYNC
RT
ENABLE
SS/TRK
AGND
FB
LM43603
V
IN
C
OUT
C
BOOT
C
IN
C
VCC
V
OUT
C
BIAS
R
FBT
R
FBB
C
FF
L
PGOOD
Product
Folder
Order
Now
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
LM43603
SNVSA09C –APRIL 2014–REVISED FEBRUARY 2017
LM43603 SIMPLE SWITCHER® 3.5 V to 36 V 3 A Synchronous Step-Down Voltage
Converter
1
1 Features
1
• 27 µA Quiescent Current in Regulation
• High Efficiency at Light Load (DCM and PFM)
• Meets EN55022/CISPR 22 EMI standards
• Integrated Synchronous Rectification
• Adjustable Frequency Range: 200 kHz to 2.2 MHz
(500 kHz default)
• Frequency Synchronization to External Clock
• Internal Compensation
• Stable with Almost Any Combination of Ceramic,
Polymer, Tantalum, and Aluminum Capacitors
• Power-Good Flag
• Soft-Start into a Pre-Biased Load
• Internal Soft-Start: 4.1 ms
• Extendable Soft-Start Time by External Capacitor
• Output Voltage Tracking Capability
• Precision Enable to a Program System UVLO
• Output Short Circuit Protection with Hiccup Mode
• Over Temperature Thermal Shutdown Protection
• Create a Custom Design Using the LM43603 with
the WEBENCH® Power Designer
2 Applications
• Industrial Power Supplies
• Telecommunications Systems
• Sub-AM Band Automotive
• General Purpose Wide V
IN
Regulation
• High Efficiency Point-Of-Load Regulation
space
space
3 Description
The LM43603 SIMPLE SWITCHER
®
regulator is an
easy to use synchronous step-down DC-DC
converter capable of driving up to 3 A of load current
from an input voltage ranging from 3.5 V to 36 V (42V
abs max). The LM43603 provides exceptional
efficiency, output accuracy and dropout voltage in a
very small solution size. An extended family is
available in 0.5 A ,1 A and 2 A load current options in
pin to pin compatible packages. Peak current mode
control is employed to achieve simple control loop
compensation and cycle-by-cycle current limiting.
Optional features such as programmable switching
frequency, synchronization, power-good flag,
precision enable, internal soft-start, extendable soft-
start, and tracking provide a flexible and easy to use
platform for a wide range of applications.
Discontinuous conduction and automatic frequency
modulation at light loads improve light load efficiency.
The family requires few external components and pin
arrangement allows simple, optimum PCB layout.
Protection features include thermal shutdown, V
CC
under-voltage lockout, cycle-by-cycle current limit,
and output short circuit protection. The LM43603
device is available in the HTSSOP / PWP 16 leaded
package (5.1mm x 6.6mm x 1.2mm) and VSON-16
package with wettable flanks. HTSSOP package will
be pin to pin compatible with LM43600, LM43601,
LM43602, LM46000, LM46001, LM46002. VSON-16
package will only be pin to pin compatible with
LM43602.
Device Information
ORDER NUMBER PACKAGE BODY SIZE
LM43603PWP HTSSOP (16) 5.1 mm x 6.6 mm
LM43603DSU VSON (16) 4.1 mm x 5.1 mm
Simplified Schematic
LM43603PWPEVM Radiated Emission Graph
12V
IN
to 3.3V
OUT
, F
S
= 500 kHz, I
OUT
= 3A
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