参数资料
型号: LT1370IR#TRPBF
厂商: Linear Technology
文件页数: 11/16页
文件大小: 0K
描述: IC REG MULTI CONFIG ADJ 6A D2PAK
标准包装: 750
类型: 降压(降压),升压(升压),反相,Cuk,回扫,正向转换器
输出类型: 可调式
输出数: 1
输出电压: 1.25 V ~ 35 V
输入电压: 2.7 V ~ 25 V
PWM 型: 电流模式
频率 - 开关: 500kHz
电流 - 输出: 6A
同步整流器:
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: TO-263-8,D²Pak(7 引线+接片),TO-263CA
包装: 带卷 (TR)
供应商设备封装: D2PAK-7
LT1370
APPLICATIO S I FOR ATIO
Layout Considerations
For maximum efficiency, LT1370 switch rise and fall times
are made as short as possible. To prevent radiation and
high frequency resonance problems, proper layout of the
components connected to the switch node is essential. B
field (magnetic) radiation is minimized by keeping output
diode, switch pin and output bypass capacitor leads as
short as possible. Figure 3 shows recommended posi-
tions for these components. E field radiation is kept low by
minimizing the length and area of all traces connected to
the switch pin. A ground plane should always be used
under the switcher circuitry to prevent interplane
coupling.
The high speed switching current path is shown schemati-
cally in Figure 4. Minimum lead length in this path is
essential to ensure clean switching and low EMI. The path
including the switch, output diode and output capacitor is
the only one containing nanosecond rise and fall times.
Keep this path as short as possible.
More Help
For more detailed information on switching regulator
circuits, please see Application Note 19. Linear
Technology also offers a computer software program,
SwitcherCAD TM , to assist in designing switching convert-
ers. In addition, our Applications Department is always
ready to lend a helping hand.
SwitcherCAD is a trademark of Linear Technology Corporation.
FB
GND
NFB
V C
S/S
V SW
V IN
D
C
C
KEEP PATH FROM
V SW , OUTPUT DIODE,
OUTPUT CAPACITORS
AND GROUND RETURN
AS SHORT AS POSSIBLE
LT1370 ? F03
Figure 3. Layout Considerations — R Package
L1
SWITCH
NODE
HIGH
V OUT
V IN
FREQUENCY
CIRCULATING
LOAD
PATH
LT1370 ? F04
Figure 4
sn1370 1370fs
11
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