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LT3154

更新时间： 2024-11-23 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
32页 4448K
描述
6A低噪声、高性能降压-升压DC/DC转换器

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中文翻译

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LT3154 数据手册

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LT3154  
5.5V 6A Low-I Monolithic  
Q
Buck-Boost DC/DC Converter  
FEATURES  
DESCRIPTION  
The LT®3154 is a highly efficient, high current, buck‑boost  
DC/DC converter that operates from input voltages  
above, below or equal to the regulated output voltage.  
The LT3154’s advanced topology provides a continu‑  
n
Single Inductor Buck-Boost Architecture  
n
Low Noise Buck-Boost Architecture  
n
Wide V Range 1.8V to 5.5V  
IN  
n
n
n
n
Adjustable V  
Range 1.8V to 5.5V  
OUT  
5A of Continuous Output Current with V > V  
ous transfer through all operating modes. V operation  
IN  
OUT  
IN  
Up to 97% Efficiency  
from 1.8V to 5.5V provides flexibility for a wide variety of  
power sources. The output voltage is adjustable between  
1.8V to 5.5V.  
Selectable Internal 2.2MHz Fixed Frequency  
Adjustable and Synchronizable: Up to 4MHz  
Burst Mode® I 17µA for High Efficiency at Light Loads  
n
n
n
n
Q
To minimize external components the LT3154 can be  
configured to operate from a 2.2MHz internal oscillator.  
To optimize applications for highest efficiency or small‑  
est footprint the oscillator can be programmed between  
500kHz to 4MHz, or synchronized to an external clock for  
noise sensitive circuits.  
Programmable Soft‑Start and V UVLO  
Simple Solution with Minimal External Components  
Small 3mm × 3mm × 0.74mm LQFN package  
IN  
APPLICATIONS  
n
Portable Inventory Terminals  
Selectable Burst Mode operation reduces quiescent cur‑  
rent to 17μA, ensuring high efficiency across the entire  
load range. The VIN start‑up threshold (UVLO) can be  
adjusted for various input sources. An internal or exter‑  
nally programmable soft‑start limits inrush current  
during start‑up. Other features include <1μA shutdown  
current, short circuit, and thermal overload protection.  
The LT3154 is housed in the thermally enhanced 16‑lead  
(3mm × 3mm × 0.74mm) LQFN package.  
n
Handheld Computers  
n
Medical and Industrial Instruments  
n
Wireless RF Transmitter  
n
Backup Power Applications  
n
Battery Powered Systems  
All registered trademarks and trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Efficiency vs VIN PWM Mode  
0.68µH  
98  
2.2MHz OPERATION  
96  
SW1  
SW2  
PWM BURST  
V
3.3V  
OUT  
94  
92  
90  
88  
86  
84  
82  
80  
PV  
V
SYNC/MODE  
PV  
IN  
OUT  
V
IN  
1.8V TO 5.5V  
OUT  
1MΩ  
V
IN  
LT3154  
RT  
FB  
C
C
IN  
OUT  
22µF  
100µF  
SS  
VC  
LOAD CURRENT  
EN/UVLO  
40.2k  
1nF  
43.2k  
4A  
GND PGND  
3A  
2A  
1A  
3154 TA01a  
0.5A  
1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6 5.0 5.4 5.8  
INPUT VOLTAGE (V)  
3154 TA01b  
Rev. A  
1
Document Feedback  
For more information www.analog.com  
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