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| 型号： | SIP12502DMP-50-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 5/11页 |
| 文件大小： | 0K |
| 描述： | IC BOOST REG 5.0V PPAK MLP33-6 |
| 标准包装： | 3,000 |
| 应用： | 转换器，电源 |
| 输入电压： | 0.85 V ~ 5 V |
| 输出数： | 1 |
| 输出电压： | 5V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | PowerPAK? MLP33-6 |
| 供应商设备封装： | PowerPAK? MLP33-6 |
| 包装： | 带卷 (TR) |
SiP12502
Vishay Siliconix
FUNCTIONAL BLOCK DIAGRAM
DETAILED OPERATION
SiP12502 is a 300 kHz boost converter IC, packaged in 6-pin
MLP33 PowerPAK TM package. With start-up from input
voltages as low as 0.65 V, this device features fixed
frequency voltage mode PWM control with internal frequency
compensation. With its low r DS(on) internal power MOSFET,
this device maintains high efficiency over a wide range of
load currents. Under light load conditions, it switches to PFM
mode to maintain high efficiency. A power good signal is
available to monitor the output voltage.
PWM operation
After the soft-start interval is over, the device works in PWM
operation with a fixed frequency of 300 kHz, with automatic
switch-over to PFM operation during light load conditions.
PFM Operation
When operating into light loads, the SiP12502 automatically
switches to PFM operation. This reduces gate charge losses
in the boost switch, hence raising converter efficiency.
Low Voltage Start-Up
SiP12502 is designed to start-up at input voltage of typically
0.65 V. At start-up, V OUT is lower than V IN due to the voltage
drop of the Schottky diode. Therefore, the device uses V IN as
the power source for its control logic and internal gate drive,
until V OUT exceeds V IN . During the start-up interval, the
boost switch’s conduction interval during each cycle is
determined by the time taken for the inductor current to reach
internal current limit, followed by a fixed off time before the
switch is allowed to turn on again. Once V OUT exceeds V IN ,
the device uses V OUT as the IC’s power source. When V OUT
exceeds 1.89 V, the device engages its built-in soft-start
Over Voltage Protection
If the output voltage is above 10 % of the regulation voltage,
the device will turn off the internal power MOSFET and wait
until the output voltage falls below the regulation voltage,
then the PWM operation is enabled again.
Thermal Shutdown Protection
If the internal device temperature rises above 160 °C, the
device will turn off the internal power MOSFET. Once the die
temperature falls below 140 °C, the device performs a new
soft-start cycle, the converter resumes normal operation.
circuitry.
Antiringing Control
Soft-Start
During soft-start, the loop compensation guarantees the slow
increase of output voltage, so that no large voltage overshoot
or inrush current transients occur when the soft-start period
ends.
Document Number: 73578
S09-1456-Rev. B, 03-Aug-09
The antiringing control circuitry prevents high frequency
ringing at the LX pin as the inductor current goes to zero by
damping the resonant circuit formed by L and C LX
(capacitance on LX pin). When the IC is shutdown, this
antiringing switch is also turned on.
www.vishay.com
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SIP12503 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:500-mA - Adjustable Boost Converter for Single or Dual Cell |
| SIP12503DMP-T1-E3 | 功能描述:直流/直流开关转换器 500mA 2.0-5.0Vout .85-5.0Vin RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| SIP12504DMP-T1-E3 | 功能描述:IC REG BOOST ADJ 1.6A MLP33-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Understanding SWIFT Step Down Dc/Dc Converters 标准包装:2,500 系列:SWIFT™ 类型:降压（降压） 输出类型:可调式 输出数:1 输出电压:1.23 V ~ 20 V 输入电压:5.5 V ~ 23 V PWM 型:电压模式 频率 - 开关:500kHz 电流 - 输出:3A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm Width）裸露焊盘 包装:带卷 (TR) 供应商设备封装:8-SO PowerPad 配用:296-19710-ND - EVALUATION MOD FOR TPS5431-173 |
| SIP12506 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:1-MHz Boost Converter with OVP for White LED Applications |
| SIP12506DMP-T1-E3 | 功能描述:DC/DC 开关控制器 1Mhz OVP Vin-18Vout 2.6-9.0Vin Boost RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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