- 您现在的位置：买卖IC网 > PDF目录13998 > LTC3545EUD-1#TRPBF (Linear Technology)IC REG BUCK SYNC ADJ 0.8A 16QFN PDF资料下载
参数资料
| 型号： | LTC3545EUD-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.8A 16QFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 3 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QFN-EP（3x3） |
LTC3545/LTC3545-1
OPERATION
SOFT-START
Soft-start reduces surge currents on V IN and output
overshoot during start-up. Soft-start on the LTC3545/
LTC3545-1 is implemented by internally ramping the refer-
ence signal fed to the error ampli?er over approximately a
1ms period. Figure 1 shows the behavior of the regulator
channels during start-up.
Short-Circuit Protection
Short-circuit protection is achieved by monitoring the in-
ductor current. When the current exceeds a predetermined
level, the main switch is turned off, and the synchronous
switch is turned on long enough to allow the current in the
inductor to decay below the fault threshold. This prevents
a catastrophic inductor current run-away condition, but
will still provide current to the output. Output voltage
regulation in this condition is not achieved.
forces the main switch to remain on for more than one
cycle until it reaches 100% duty cycle. The output volt-
age will then be determined by the input voltage minus
the voltage drop across the P-channel MOSFET and the
inductor. An important detail to remember is that at low
input supply voltages, the R DS(ON) of the P-channel switch
increases (see Typical Performance Characteristics).
Therefore, the user should calculate the power dissipation
when the LTC3545/LTC3545-1 is used at 100% duty cycle
with low input voltage (See Thermal Considerations in the
Applications Information section).
V OUT1
V OUT2
V OUT3
(ALL 1V/DIV)
RUNX
2V/DIV
DROPOUT OPERATION
As the input supply voltage decreases to a value approach-
ing the output voltage, the duty cycle increases toward the
T A = 25°C 200μs/DIV
V IN = 3.6V
I LOAD = 0mA, ALL CHANNELS
3545 F01
maximum on-time. Further reduction of the supply voltage
Figure 1. Start-Up from Shutdown, No Load
35451fb
11
相关PDF资料 |
PDF描述 |
|---|---|
| 83823C | INDUCTOR 82.0UH 0.27A SMD |
| 16MS733MEFC6.3X7 | CAP ALUM 33UF 16V 20% RADIAL |
| MAX6865UK26D3S+T | IC MPU SUPERVISOR SOT23-5 |
| 16MS747MEFC6.3X7 | CAP ALUM 47UF 16V 20% RADIAL |
| 10MS547MEFC6.3X5 | CAP ALUM 47UF 10V 20% RADIAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3545EUDPBF | 制造商:Linear Technology 功能描述:Conv DC-DC Triple Step-Down 5.5V QFN16EP |
| LTC3545EUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple 800mA Synchronous Step-Down Regulator-2.25MHz |
| LTC3545EUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple 800mA Synchronous Step-Down Regulator-2.25MHz |
| LTC3545IUD#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.8A 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3545IUD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.8A 16QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
发布紧急采购，3分钟左右您将得到回复。