- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367416 > L5973D (意法半導(dǎo)體) RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS PDF資料下載
參數(shù)資料
| 型號(hào)： | L5973D |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 5/13頁(yè) |
| 文件大?。?/td> | 166K |
| 代理商： | L5973D |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)當(dāng)前第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)
5/13
L5973AD
VOLTAGES MONITOR
An internal block senses continuously the V
cc
, V
ref
and V
bg
. If the voltages go higher than their thresholds, the
regulator starts to work. There is also an hysteresis on the V
CC
(UVLO).
Figure 2. Internal Regulator Circuit
OSCILLATOR & SYNCHRONIZATOR
Figure 3 shows the block diagram of the oscillator circuit.
The Clock Generator provides the switching frequency of the device that is internally fixed at 500KHz. The frequency
shifter block acts reducing the switching frequency in case of strong overcurrent or short circuit. The clock signal is
then used in the internal logic circuitry and is the input of the Ramp Generator and Synchronizator blocks.
The Ramp Generator circuit provides the sawtooth signal, used to realize the PWM control and the internal volt-
age feed forward, while the Synchronizator circuit generates the synchronization signal. Infact the device has a
synchronization pin that can works both as Master and Slave.
As Master to synchronize external devices to the internal switching frequency.
As Slave to synchronize itself by external signal.
In particular, connecting together two devices, the one with the lower switching frequency works as Slave and
the other one works as Master.
To synchronize the device, the SYNC pin has to pass from a low level to a level higher than the synchronization
threshold with a duty cycle that can vary approximately from 10% to 90%, depending also on the signal frequen-
cy and amplitude.
The frequency of the synchronization signal must be at least higher than the internal switching frequency of the
device (500KHz).
STARTER
IC BIAS
PREREGULATOR
BANDGAP
VREG
VREF
D00IN1126
V
CC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L5994A | ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER |
| L5994 | ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER |
| L5995 | Current-Mode SMPS Controller |
| L6116LDC25 | x8 SRAM |
| L6116LDC35 | x8 SRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L5973D_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.5 A switch step down switching regulator?癎 |
| L5973D013TR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.5 A Step-DN Switching Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| L5974AD | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2A SD switch reg BCD5 220nF 5V RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| L5974ADTR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2A SD switch reg BCD5 220nF 5V RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| L5974D | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.5A SD switch reg BCD5 220nF 5V RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。