- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄30770 > LTC3615EUF#PBF (LINEAR TECHNOLOGY CORP) SWITCHING REGULATOR, PQCC24 PDF資料下載
參數(shù)資料
| 型號： | LTC3615EUF#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PQCC24 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件頁數(shù)： | 13/32頁 |
| 文件大?。?/td> | 585K |
| 代理商： | LTC3615EUF#PBF |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當(dāng)前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
LTC3615/LTC3615-1
20
3615fa
50μs/DIV
3615 F05
VOUT
200mV/DIV
IL
1A/DIV
100mA
3A
VOUT = 1.8V
ILOAD = 100mA TO 3A
VMODE = 1.5V
COMPENSATION AND OUTPUT CAPACITOR
VALUES OF FIGURE 3
VOUT
100mV/DIV
IL
1A/DIV
50μs/DIV
3615 F06
VOUT = 1.8V
ILOAD = 100mA TO 3A
VMODE = 1.5V
VIN = VITH = 3.3V
OUTPUT CAPACITOR VALUE FIGURE 3
Figure 6. Load Step Transient in FCM in AVP Mode
Figure 5. Load Step Transient in FCM with External Compensation
Applications section uses faster compensation to improve
load step response.
A second, more severe transient is caused by switching
in loads with large (>1μF) supply bypass capacitors. The
discharged bypass capacitors are effectively put in parallel
with COUT, causing a rapid drop in VOUT. No regulator can
alter its delivery of current quickly enough to prevent this
sudden step change in output voltage if the load switch
resistance is low and it is driven quickly. More output
capacitance may be required depending on the duty cycle
and load step requirements.
If the ITH pin is tied to SVIN, the active voltage positioning
(AVP) mode and the internal compensation is selected.
In AVP mode, the load regulation performance is inten-
tionally reduced, setting the output voltage at a point that
is dependent on the load current. When the load current
suddenly increases, the output voltage starts from a level
slightly higher than nominal so the output voltage can
droop more and stay within the specied voltage range.
When the load current suddenly decreases, the output
voltage starts at a level lower than nominal so the output
voltage can have more overshoot and stay within the
specied voltage range. This behavior is demonstrated
in Figure 6.
The benet is a lower peak-to-peak output voltage devia-
tion for a given load step without having to increase the
output lter capacitance. Alternatively, the output voltage
lter capacitance can be reduced while maintaining the
same peak-to-peak transient response. For this operation
mode, the loop gain is reduced and no external compensa-
tion is required.
Programmable Switch Pin Slew Rate
As switching frequencies rise, it is desirable to minimize the
transition time required when switching to minimize power
losses and blanking time for the switch to settle. However,
fast slewing of the switch node results in relatively high
external radiated EMI and high on-chip supply transients,
which can cause problems for some applications.
APPLICATIONS INFORMATION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3615EFE#PBF | SWITCHING REGULATOR, PDSO24 |
| LTC3615IFE-1#PBF | SWITCHING REGULATOR, PDSO24 |
| LTC3615EUF#TRPBF | SWITCHING REGULATOR, PQCC24 |
| LTC3615IFE#PBF | SWITCHING REGULATOR, PDSO24 |
| LTC3727IG-1#TR | 3 A SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3615HFE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615HFE#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615HFE-1#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615HFE-1#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
| LTC3615HUF#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 3A 24TSSOP |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。