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參數(shù)資料
| 型號： | TPS54062DGKR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 2/30頁 |
| 文件大小： | 745K |
| 代理商： | TPS54062DGKR |
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SLVSAV1
– MAY 2011
OVERVIEW
The TPS54062 device is a 60V, 50mA, step-down (buck) regulator with an integrated high side and low side
n-channel MOSFET. To improve performance during line and load transients the device implements a constant
frequency, current mode control which reduces output capacitance and simplifies external frequency
compensation design.
The switching frequency of 100 kHz to 400 kHz allows for efficiency and size optimization when selecting the
output filter components. The switching frequency is adjusted using a resistor to ground on the RT/CLK pin. The
device has an internal phase lock loop (PLL) on the RT/CLK pin that is used to synchronize the power switch
turn on to a falling edge of an external system clock.
The TPS54062 has a default start up voltage of approximately 4.5V. The EN pin has an internal pull-up current
source that can be used to adjust the input voltage undervoltage lockout (UVLO) threshold with two external
resistors. In addition, the pull up current provides a default condition. When the EN pin is floating the device will
operate. The operating current is 89uA when not switching and under no load. When the device is disabled, the
supply current is 1.7
A.
The integrated 1.5
Ω high side MOSFET and 0.8Ω low side MOSFET allows for high efficiency power supply
designs capable of delivering 50 milliamperes of continuous current to a load.
The TPS54062 reduces the external component count by integrating the boot recharge diode. The bias voltage
for the integrated high side MOSFET is supplied by a capacitor on the BOOT to PH pin. The boot capacitor
voltage is monitored by an UVLO circuit and will turn the high side MOSFET off when the boot voltage falls
below a preset threshold. The TPS54062 can operate at high duty cycles because of the boot UVLO. The output
voltage can be stepped down to as low as the 0.8V reference.
The TPS54062 has an internal output OV protection that disables the high side MOSFET if the output voltage is
109% of the nominal output voltage.
The TPS54062 reduces external component count by integrating the slow start time using a reference DAC
system.
The TPS54062 resets the slow start times during overload conditions with an overload recovery circuit. The
overload recovery circuit will slow start the output from the fault voltage to the nominal regulation voltage once a
fault condition is removed. A frequency foldback circuit reduces the switching frequency during startup and
overcurrent fault conditions to help control the inductor current.
10
Copyright
2011, Texas Instruments Incorporated
Product Folder Link(s): TPS54062
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54062DRBR | 功能描述:直流/直流開關調節(jié)器 4.7-60Vin,50mA Sync Step-Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54062DRBT | 功能描述:直流/直流開關調節(jié)器 4.7-60Vin,50mA Sync Step-Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54062EVM-695 | 功能描述:電源管理IC開發(fā)工具 TPS54062 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54073 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.2 ?4 -V, 14-A SYNCHRONOUS BUCK CONVERTER WITH DISABLED SINKING DURING START-UP |
| TPS54073EVM-098 | 功能描述:電源管理IC開發(fā)工具 14A DC/DC Conv Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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