参数资料
型号: LT3483IDC#TRPBF
厂商: Linear Technology
文件页数: 8/12页
文件大小: 0K
描述: IC REG INV ADJ 0.2A 8DFN
标准包装: 2,500
类型: 反相
输出类型: 可调式
输出数: 1
输出电压: 可调至 -38V
输入电压: 2.5 V ~ 16 V
电流 - 输出: 200mA
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 8-DFN(2x2)
LT3483/LT3483A
APPLICATIONS INFORMATION
Board Layout Considerations
As with all switching regulators, careful attention must
be given to the PCB board layout and component place-
ment. Proper layout of the high frequency switching path
is essential. The voltage signals of the SW and D pins
have sharp rising and falling edges. Minimize the length
Suggested Layout (DFN)
for Inverting Charge Pump
and area of all traces connected to the SW and D pins.
In particular, it is desirable to minimize the trace length
to and from the flying capacitor, since current in this ca-
pacitor switches directions within a cycle. Always use a
ground plane under the switching regulator to minimize
interplane coupling.
Suggested Layout (SOT-23)
for Inverting Charge Pump
V OUT
C OUT
R1
A
GND
C FLY
C IN L1
1
2
3
9
8
7
6
K
SHDN
1
2
6
5
V IN
GND
4
C IN
L1
5
C FLY
V IN
V OUT
C OUT
R1
3
4
SHDN
3483 AI02
3483 AI01
TYPICAL APPLICATIONS
3.6V to –22V DC/DC Converter
3.6V to –22V Converter Efficiency and Power Loss
0.1μF
V IN
3.6V
C1
4.7μF
L1
10μH
SW
V IN D
LT3483
SHDN FB
C2
D1
5pF
R S
30?
R1
2.2M
C3
1μF
V OUT
–22V
8mA
75
70
65
EFFICIENCY
POWER
LOSS
1000
100
10
GND
60
1
C1: TAIYO YUDEN LMK316BJ475MD
C2: TAIYO YUDEN TMK107BJ104 (X5R)
C3: TAIYO YUDEN TMK316BJ105MD
D1: PHILIPS PMEG3002AEB
L1: MURATA LQH2MCN100K02L
3483 TA02a
55
0.1
1
LOAD CURRENT (mA)
0.1
10
3483 TA02b
3483fc
8
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