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LT1618EDDPBF PDF预览

LT1618EDDPBF

更新时间: 2024-11-21 12:49:31
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
16页 215K
描述
Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter

LT1618EDDPBF 数据手册

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LT1618  
Constant-Current/  
Constant-Voltage 1.4MHz  
Step-Up DC/DC Converter  
U
FEATURES  
DESCRIPTIO  
Accurate Input/Output Current Control: ±5% Over  
The LT®1618 step-up DC/DC converter combines a tradi-  
tionalvoltagefeedbackloopandauniquecurrentfeedback  
loop to operate as a constant-current, constant-voltage  
source. Thisfixedfrequency, currentmodeswitcheroper-  
ates from a wide input voltage range of 1.6V to 18V, and  
thehighswitchingfrequencyof1.4MHzpermitstheuseof  
tiny, low profile inductors and capacitors. The current  
sensevoltageissetat50mVandcanbeadjustedusingthe  
Temperature  
Accurate Output Voltage Control: ±1%  
Wide VIN Range: 1.6V to 18V  
1.4MHz Switching Frequency  
High Output Voltage: Up to 35V  
Low VCESAT Switch: 200mV at 1A  
Available in (3mm × 3mm × 0.8mm) 10-Pin DFN and  
IADJ pin.  
10-Pin MSOP PaUckages  
Available in the 10-Pin (3mm × 3mm) Exposed Pad DFN  
and 10-pin MSOP packages, the LT1618 provides a com-  
plete solution for constant-current applications.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
APPLICATIO S  
LED Backlight Drivers  
USB Powered Boost/SEPIC Converters  
Input Current Limited Boost/SEPIC Converters  
Battery Chargers  
U
TYPICAL APPLICATIO  
USB to 12V Boost Converter  
(with Selectable 100mA/500mA Input Current Limit)  
L1  
10µH  
D1  
0.1  
Efficiency Curve  
V
IN  
5V  
V
OUT  
12V  
90  
85  
80  
75  
70  
65  
60  
2
7
ISN  
ISP  
SW  
C1  
4.7µF  
R1  
3
909k  
LT1618  
1
8
9
C2  
4.7µF  
V
FB  
IN  
3.3V  
ON  
R2  
107k  
SHDN  
OFF  
0V  
I
V
GND  
5
ADJ  
C
20k  
4
10  
2k  
10nF  
3.3V  
500mA  
100mA  
0V  
13k  
100 160  
120 140  
0
80  
20 40 60  
LOAD CURRENT (mA)  
C1: TAIYO YUDEN JMK212BJ475  
C2: TAIYO YUDEN EMK316BJ475  
D1: ON SEMICONDUCTOR MBR0520  
L1: SUMIDA CR43-100  
1618 TA01a  
1618 TA01b  
sn1618 1618fas  
1

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