- 您现在的位置：买卖IC网 > PDF目录14013 > LTC3527EUD-1#PBF (Linear Technology)IC REG BOOST SYNC ADJ DL 16QFN PDF资料下载
参数资料
| 型号： | LTC3527EUD-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ DL 16QFN |
| 标准包装： | 121 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 1.6 V ~ 5.25 V |
| 输入电压： | 0.5 V ~ 5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.2MHz，2.2MHz |
| 电流 - 输出： | 400mA，800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-QFN（3x3） |
LTC3527/LTC3527-1
APPLICATIONS INFORMATION
PCB Layout Guidelines
The minimum inductance value is given by:
The high speed operation of the LTC3527/LTC3527-1
demands careful attention to board layout. A careless
layout will result in reduced performance. Figure 1 shows
L >
V IN(MIN) ? ( V OUT(MAX ) – V IN(MIN) )
f ? Ripple ? V OU T ( MAX )
the recommended component placement. A large ground
pin copper area will help to lower the die temperature. A
multilayer board with a separate ground plane is ideal, but
not absolutely necessary.
COMPONENT SELECTION
Inductor Selection
The LTC3527/LTC3527-1 can utilize small surface mount
inductors due to their fast 1.2MHz/2.2MHz switching
frequencies. Inductor values between 3.3μH and 4.7μH
are suitable for most 1.2MHz applications. Inductor values
between 1.5μH and 2.2μH are suitable for most 2.2MHz
applications. Larger values of inductance will allow slightly
greater output current capability (and lower the Burst
Mode threshold) by reducing the inductor ripple cur-
rent. Increasing the inductance above 10μH will increase
size while providing little improvement in output current
capability.
where:
Ripple = Allowable inductor current ripple (amps
peak-to-peak)
V IN(MIN) = Minimum input voltage
V OUT(MAX) = Maximum output voltage
f = Oscillator frequency (MHz)
The inductor current ripple is typically set for 20% to
40% of the maximum inductor current. High frequency
ferrite core inductor materials reduce frequency dependent
power losses compared to cheaper powdered iron types,
improving ef?ciency. The inductor should have low ESR
(series resistance of the windings) to reduce the I 2 R power
losses, and must be able to support the peak inductor
current without saturating. Molded chokes and some
chip inductors usually do not have enough core area to
support the peak inductor currents of 900mA (500mA)
seen on the LTC3527/LTC3527-1. To minimize radiated
noise, use shielded inductors. See Table 1 for suggested
components and suppliers.
MODE SHDN1
GND
V IN1
V OUT1
V IN
GND
GND
V OUT2
SHDN2 FSEL
GND
V IN2
35271 F01
Figure 1. Recommended Component Placement for a Dual-Layer Board
35271fc
13
相关PDF资料 |
PDF描述 |
|---|---|
| V28C24C100BF3 | CONVERTER MOD DC/DC 24V 100W |
| LTC3527EUD#PBF | IC REG BOOST SYNC ADJ DL 16QFN |
| MAX6717AUKZWD6+T | IC SUPERVISOR MPU SOT23-5 |
| MAX6717AUKZWD2+T | IC SUPERVISOR MPU SOT23-5 |
| LT3663IDCB#TRPBF | IC REG BUCK ADJ 1.2A 8DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3527EUD-1-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
| LTC3527EUD-1-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
| LTC3527EUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
| LTC3527EUD-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
| LTC3527EUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 800mA/400mA, 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters |
发布紧急采购，3分钟左右您将得到回复。