参数资料
型号: LT1946EMS8#TRPBF
厂商: Linear Technology
文件页数: 12/12页
文件大小: 0K
描述: IC REG BOOST 1.5A 8MSOP
标准包装: 2,500
类型: 升压(升压)
输出数: 1
输入电压: 2.45 V ~ 16 V
PWM 型: 电流模式
频率 - 开关: 2.7MHz
电流 - 输出: 1.5A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
供应商设备封装: 8-MSOP
LT1946
TYPICAL APPLICATIO
Low Profile, Triple Output TFT Supply (8V, – 8V, 23V)
D2
D3
D4
D5
V ON
23V
5mA
C5
0.1 μ F
C6
0.1 μ F
C7
0.1 μ F
V IN
3.3V
OFF ON
3
6
V IN
SHDN
L1
5.4 μ H
5
SW
D1
R2
28.7k
AV DD
8V
375mA
+
C1
4.7 μ F
8
7
SS LT1946
COMP
V C
FB
GND
2
C2
20 μ F
C4
1 μ F
C SS
100nF
1
R C
49.9k
4
R3
5.23k
C C
470pF
C1 TO C8: X5R OR X7R
C1: 4.7 μ F, 6.3V
C2: 2 × 10 μ F, 10V
C3: 2.2 μ F, 10V
C4: 1 μ F, 25V
C5, C6, C8: 0.1 μ F, 10V
C7: 0.1 μ F, 16V
D1: MICROSEMI UPS120 OR EQUIVALENT
D2 TO D5: ZETEX BAT54S OR EQUIVALENT
C8
0.1 μ F
D7
D6
C3
2.2 μ F
1946 TA03
V OFF
–8V
10mA
L1: SUMIDA CDRH5D18-5R4
85
80
Efficiency
AV DD
Start-Up Waveforms
2V/DIV
75
70
65
60
V ON
10V/DIV
V OFF
5V/DIV
55
50
V ON LOAD = 5mA
V OFF LOAD = 10mA
I IN
200mA/V
0
100
200
300
400
AV DD LOAD CURRENT (mA)
RELATED PARTS
1946 TA03a
1ms/DIV
1946 TA04
1.4MHz Switching Regulator in 5-Lead ThinSOT
PART NUMBER
LT1613
LT1615
LT1930/LT1930A
LT1944/LT1944-1
LT1945
LT1946A
LT1947
DESCRIPTION
TM
Micropower Constant Off-Time DC/DC Converter in 5-Lead ThinSOT
1.2MHz/2.2MHz, 1A Switching Regulator in 5-Lead ThinSOT
Dual 350mA Boost Converter
Dual ± 250mA Boost Converter
2.7MHz, 1.5A Boost DC/DC Converter
3MHz, Dual Switching Regulator
COMMENTS
5V at 200mA from 3.3V Input, ThinSOT Package
20V at 12mA from 2.5V, ThinSOT Package
12V at 300mA from 5V Input, ThinSOT Package
V IN = 1.2V to 15V, V OUT to 34V, MS10 Package
V IN = 1.2V to 15V, V OUT to ± 34V, MS10 Package
V IN = 2.45V to 16V, V OUT to 34V, MS8E Package
8V at 200mA from 3.3V Input, 10-Lead MSOP Package
ThinSOT is a trademark of Linear Technology Corporation.
1946fb
(408) 432-1900 ● FAX: (408) 434-0507 www.linear.com
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LT 0207 REV B ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 2001
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LT1946EMS8#TR IC REG BOOST 1.5A 8MSOP
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