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Datasheet> 器件分类 > LTC3547BEDDB#PBF
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LTC3547BEDDB#PBF

产品描述Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R
文件大小251KB，共16页
制造商ADI(亚德诺半导体)
官网地址https://www.analog.com
下载文档 详细参数 选型对比 全文预览

LTC3547BEDDB#PBF概述

Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R

LTC3547BEDDB#PBF规格参数

参数名称属性值
欧盟限制某些有害物质的使用Compliant
ECCN (US)0
Part StatusUnconfirmed
HTS8542.39.00.01
类型
Type		Synchronous Step Down
输出类型
Output Type		Adjustable
Switching Frequency (kHz)2700
Switching RegulatorYes
Number of Outputs2
Output Voltage (V)0.6 to 5.5
Maximum Output Current (A)0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3
Minimum Input Voltage (V)2.5
Maximum Input Voltage (V)5.5
Operating Supply Voltage (V)2.5 to 5.5
Line Regulation0.5%/V
Load Regulation0.5%(Typ)
Efficiency (%)96
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
系列
Packaging		Tape and Reel
Pin Count8
Standard Package NameDFN
Supplier PackageDFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length3
Package Width2
PCB changed8
Lead ShapeNo Lead

文档预览

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LTC3547B
Dual Monolithic
300mA Synchronous
Step-Down Regulator
FEATURES
■
■
■
■
■
■
■
■
■
■
DESCRIPTIO
■
■
■
■
High Efficiency (Up to 96%) Dual Step-Down
Outputs
300mA Output Current per Channel at V
IN
= 3V
2.25MHz Constant-Frequency Operation
2.5V to 5.5V Input Voltage Range
Low Dropout Operation: 100% Duty Cycle
No Schottky Diodes Required
Internally Compensated for All Ceramic Capacitors
Independent Internal Soft-Start for Each Channel
Available in Fixed Output Versions
Current Mode Operation for Excellent Line and Load
Transient Response
0.6V Reference Allows Low Output Voltages
Short-Circuit Protected
Ultralow Shutdown Current: I
Q
< 1μA
Low Profile (0.75mm) 8-Lead 3mm × 2mm
DFN Package
The LTC
®
3547B is a dual, 2.25MHz, constant-frequency,
synchronous step-down DC/DC converter in a tiny 3mm ×
2mm DFN package. 100% duty cycle provides low drop-
out operation, extending battery life in portable systems.
Low output voltages are supported with the 0.6V feed-
back reference voltage. Each regulator can supply 300mA
continuous output current.
The input voltage range is 2.5V to 5.5V, making it ideal
for Li-Ion polymer and USB powered applications. Supply
current is only 1μA in shutdown.
An internally set 2.25MHz switching frequency allows the
use of tiny surface mount inductors and capacitors. Inter-
nal soft-start reduces inrush current during start-up. All
outputs are internally compensated to work with ceramic
capacitors. The LTC3547B is available in a low profile
(0.75mm) 3mm × 2mm DFN package. The LTC3547B
is also available in a fixed output voltage configuration
selected via internal resistor dividers (see Table 2).
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6580258, 5481178, 6304066, 6127815, 6498466, 6611131.
APPLICATIO S
■
■
■
■
■
Cellular Telephones
Digital Still Cameras
Wireless and DSL Modems
Portable Media Players
PDAs/Palmtop PCs
TYPICAL APPLICATIO
V
IN
2.5V TO 5.5V
Dual Monolithic Buck Regulator in 8-Lead 3mm × 2mm DFN
100
90
80
RUN2 V
IN
RUN1
V
OUT2
1.8V AT
300mA
4.7μH
10pF
LTC3547B
SW2
SW1
10pF
4.7μH
V
OUT1
2.5V AT
300mA
EFFICIENCY (%)
4.7μF
70
60
50
40
30
20
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
1
10
100
OUTPUT CURRENT (mA)
V
FB2
4.7μF
475k
237k
GND
V
FB1
150k
475k
4.7μF
3547b TA01
10
0
U
Efficiency vs Output Current
for V
OUT
= 2.5V
1
POWER LOSS (W)
0.1
0.01
0.001
1000
3547bfb
3547b TA01b
U
U
1

LTC3547BEDDB#PBF相似产品对比

LTC3547BEDDB#PBF LTC3547BEDDB#TR LTC3547BEDDB#TRMPBF LTC3547BEDDB#TRPBF LTC3547BEDDB-1#PBF LTC3547BEDDB-1#TRMPBF LTC3547BEDDB-1#TRPBF LTC3547BIDDB#PBF LTC3547BIDDB#TRMPBF LTC3547BIDDB#TRPBF
描述 Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP Reel Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5.5V 0.3A/0.3A Automotive 8-Pin DFN EP T/R
欧盟限制某些有害物质的使用 Compliant Not Compliant Compliant Compliant Compliant Compliant Compliant Compliant Compliant Compliant
ECCN (US) - EAR99 EAR99 EAR99 - EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Unconfirmed Unconfirmed Active Active Unconfirmed Active Active Unconfirmed Active Active
类型
Type		 Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down
输出类型
Output Type		 Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Switching Frequency (kHz) 2700 2700 2700 2700 2700 2700 2700 2700 2700 2700
Switching Regulator Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Number of Outputs 2 2 2 2 2 2 2 2 2 2
Output Voltage (V) 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5 0.6 to 5.5
Maximum Output Current (A) 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3 0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3|0.3
Minimum Input Voltage (V) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5
Maximum Input Voltage (V) 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5
Operating Supply Voltage (V) 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5 2.5 to 5.5
Line Regulation 0.5%/V 0.5%/V 0.5%/V 0.5%/V 0.5%/V 0.5%/V 0.5%/V 0.5%/V 0.5%/V 0.5%/V
Load Regulation 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ)
Efficiency (%) 96 96 96 96 96 96 96 96 96 96
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85 85 85 85 85 125 125 125
Supplier Temperature Grade Extended Extended Extended Extended Extended Extended Extended Industrial Industrial Industrial
系列
Packaging		 Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Reel Tape and Reel Tape and Reel
Pin Count 8 8 8 8 8 8 8 8 8 8
Standard Package Name DFN DFN DFN DFN DFN DFN DFN DFN DFN DFN
Supplier Package DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP DFN EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 3 3 3 3 3 3 3 3 3 3
Package Width 2 2 2 2 2 2 2 2 2 2
PCB changed 8 8 8 8 8 8 8 8 8 8
Lead Shape No Lead No Lead No Lead No Lead No Lead No Lead No Lead No Lead No Lead No Lead

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