参数资料
型号: LT3759HMSE#TRPBF
厂商: Linear Technology
文件页数: 24/32页
文件大小: 0K
描述: IC REG CTRLR BST INV PWM 12-MSOP
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
电源电压: 1.6 V ~ 42 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 150°C
封装/外壳: 12-TSSOP (0.118",3.00mm 宽)裸露焊盘
包装: 带卷 (TR)
LT3759
APPLICATIONS INFORMATION
? In flyback configuration, the high di/dt primary loop
contains the input capacitor, the primary winding, the
power MOSFET and sensing resistor. The high di/dt
secondary loop contains the output capacitor, the sec-
ondary winding and the output diode.
? In SEPIC configuration, the high di/dt loop contains
the power MOSFET, sense resistor, output capacitor,
Schottky diode and the coupling capacitor.
? In inverting configuration, the high di/dt loop contains
power MOSFET, sense resistor, Schottky diode and the
coupling capacitor.
Check the stress on the power MOSFET by measuring its
drain-to-source voltage directly across the device terminals
(reference the ground of a single scope probe directly to
the source pad on the PC board). Beware of inductive
ringing, which can exceed the maximum specified voltage
rating of the MOSFET. If this ringing cannot be avoided,
and exceeds the maximum rating of the device, either
choose a higher voltage device or specify an avalancher-
ated power MOSFET.
The small-signal components should be placed away from
high frequency switching nodes. For optimum load regula-
tion and true remote sensing, the top of the output voltage
sensing resistor divider should connect independently to
the top of the output capacitor (Kelvin connection), staying
away from any high dV/dt traces. Place the divider resis-
tors near the LT3759 in order to keep the high impedance
FBX node short.
Figure 10 shows the suggested layout of 1.8V to 3.3V
input, 5V/2A Output Boost Converter.
VIAS TO GROUND
PLANE
R4
R3
V IN
C C1
C C2
R1
R2
R C
1
2
LT3759
12
11
VIAS TO V IN
L1
C SS
R T
3
4
5
10
9
8
C DRIVE
C VCC
R PGOOD
6
13
7
R S
1
2
3
M1
8
7
6
GND
4
5
V IN
C IN
C OUT2
C OUT1
D1
V OUT
3759 F10
Figure 10. The Suggested Boost Converter Layout
3759fc
24
For more information www.linear.com/3759
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LT3759IMSE#PBF 功能描述:IC REG CTRLR BST INV PWM 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR)
LT3759IMSE#TRPBF 功能描述:IC REG CTRLR BST INV PWM 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR)
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