參數(shù)資料
型號(hào)： L5980TR
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 1.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 3 X 3 MM, 1.08 MM HEIGHT, ROHS COMPLIANT, VFQFPN-8
文件頁(yè)數(shù)： 41/42頁(yè)
文件大?。?/td> 1188K
代理商： L5980TR
Functional description
L5980
8/42
Doc ID 13003 Rev 6
4
Functional description
The L5980 is based on a “voltage mode”, constant frequency control. The output voltage
VOUT is sensed by the feedback pin (FB) compared to an internal reference (0.6 V) providing
an error signal that, compared to a fixed frequency sawtooth, controls the on and off time of
the power switch.
The main internal blocks are shown in the block diagram in Figure 3. They are:
●
A fully integrated oscillator that provides sawtooth to modulate the duty cycle and the
synchronization signal. Its switching frequency can be adjusted by and external
resistor. The voltage and frequency feed forward are implemented.
●
The soft-start circuitry to limit inrush current during the start up phase.
●
The voltage mode error amplifier
●
The pulse width modulator and the relative logic circuitry necessary to drive the internal
power switch.
●
The high-side driver for embedded p-channel power MOSFET switch.
●
The peak current limit sensing block, to handle overload and short circuit conditions.
●
A voltage regulator and internal reference. It supplies internal circuitry and provides a
fixed internal reference.
●
A voltage monitor circuitry (UVLO) that checks the input and internal voltages.
●
A thermal shutdown block, to prevent thermal run away.
Figure 3.
Block diagram
相關(guān)PDF資料
PDF描述
L5983 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
L5983TR 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
L5986A 3.9 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
L5986ATR 3.9 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
L5986TR 3.9 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L5980TR-CUT TAPE 制造商:ST 功能描述:L5980 Series 15 V 250 kHz 0.7 A Step Down Switching Regulator - VFQFPN-8
L5981 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1A STEP-DOWN SWITCH REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5981_08 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:1 A step-down switching regulator
L5981TR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1a Step-Down Switching Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5983 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.5A STEP-DOWN SWITCHING REGULATOR RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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