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| 型号： | TPS62067DSG |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 3400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 2 X 2 MM, 0.75 MM HEIGHT, PLASTIC, WSON-8 |
| 文件页数： | 8/28页 |
| 文件大小： | 1208K |
| 代理商： | TPS62067DSG |
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SLVS833A – MARCH 2010 – REVISED MAY 2010
www.ti.com
This limits the inrush current in the converter during start up and prevents possible input voltage drops when a
battery or high impedance power source is used.
During soft start, the switch current limit is reduced to 1/3 of its nominal value ILIMF until the output voltage
reaches 1/3 of its nominal value. Once the output voltage trips this threshold, the device operates with its
nominal current limit ILIMF.
INTERNAL CURRENT LIMIT / FOLD-BACK CURRENT LIMIT FOR SHORT-CIRCUIT PROTECTION
During normal operation the High-Side and Low-Side MOSFET switches are protected by its current limits ILIMF.
Once the High-Side MOSFET switch reaches its current limit, it is turned off and the Low-Side MOSFET switch is
turned on. The High-Side MOSFET switch can only turn on again, once the current in the Low -Side MOSFET
switch decreases below its current limit ILIMF. The device is capable to provide peak inductor currents up to its
internal current limit ILIMF..
As soon as the switch current limits are hit and the output voltage falls below 1/3 of the nominal output voltage
due to overload or short circuit condition, the foldback current limit is enabled. In this case the switch current limit
is reduced to 1/3 of the nominal value ILIMF.
Due to the short-circuit protection is enabled during start-up, the device does not deliver more than 1/3 of its
nominal current limit ILIMF until the output voltage exceeds 1/3 of the nominal output voltage. This needs to be
considered when a load is connected to the output of the converter, which acts as a current sink.
CLOCK DITHERING
In order to reduce the noise level of switch frequency harmonics in the higher RF bands, the TPS6206x family
has a built-in clock-dithering circuit. The oscillator frequency is slightly modulated with a sub clock causing a
clock dither of typ. 6ns.
THERMAL SHUTDOWN
As soon as the junction temperature, TJ, exceeds 150°C (typical) the device goes into thermal shutdown. In this
mode, the High-Side and Low-Side MOSFETs are turned off. The device continues its operation with a softstart
once the junction temperature falls below the thermal shutdown hysteresis.
16
Copyright 2010, Texas Instruments Incorporated
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| TPS62067DSGR | 功能描述:直流/直流开关转换器 3MHz 2A Step-Down Converter 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 |
| TPS62067DSGT | 功能描述:直流/直流开关转换器 3MHz 2A Step-Down Converter 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 |
| TPS62067DSGT | 制造商:Texas Instruments 功能描述:VOLTAGE REGULATOR IC 制造商:Texas Instruments 功能描述:IC, STEP-DOWN CONVERTER, WSON-8 |
| TPS62067QDSGRQ1 | 功能描述:Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 2A 8-WFDFN Exposed Pad 制造商:texas instruments 系列:汽车级，AEC-Q100 包装:剪切带（CT） 零件状态:在售 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:2.9V 电压 - 输入（最大值）:6V 电压 - 输出（最小值/固定）:0.8V 电压 - 输出（最大值）:6V 电流 - 输出:2A 频率 - 开关:3MHz 同步整流器:是 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商器件封装:8-WSON（2x2） 标准包装:1 |
| TPS62080ADSGR | 功能描述:直流/直流开关转换器 1.2A High Eff Step Down Converter 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 |
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