- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382829 > AAT2506IWP-AN-T1 (Advanced Analog Technology,lnc.) 1MHz Step-Down Converter/LDO Regulator PDF資料下載
參數(shù)資料
| 型號(hào)： | AAT2506IWP-AN-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 1MHz Step-Down Converter/LDO Regulator |
| 中文描述： | 1MHz的降壓轉(zhuǎn)換器/ LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 19/26頁 |
| 文件大小： | 697K |
| 代理商： | AAT2506IWP-AN-T1 |
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頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁
Thermal Calculations
There are three types of losses associated with the
AAT2506 step-down converter: switching losses,
conduction losses, and quiescent current losses.
Conduction losses are associated with the R
DS(ON)
characteristics of the power output switching
devices. Switching losses are dominated by the
gate charge of the power output switching devices.
At full load, assuming continuous conduction mode
(CCM), a simplified form of the step-down convert-
er and LDO losses is given by:
I
QBUCK
is the step-down converter quiescent cur-
rent and I
QLDO
is the LDO quiescent current. The
term t
sw
is used to estimate the full load step-down
converter switching losses.
For the condition where the buck converter is in
dropout at 100% duty cycle, the total device dissi-
pation reduces to:
Since R
DS(ON)
, quiescent current, and switching
losses all vary with input voltage, the total losses
should be investigated over the complete input
voltage range.
Given the total losses, the maximum junction tem-
perature can be derived from the
θ
JA
for the
TDFN33-12 package which is 50°C/W.
PCB Layout
The following guidelines should be used to ensure
a proper layout.
1. The input capacitor C2 should connect as
closely as possible to VP and PGND, as shown
in Figure 4.
2. The output capacitor and inductor should be
connected as closely as possible. The connec-
tion of the inductor to the LX pin should also be
as short as possible.
3. The feedback trace should be separate from
any power trace and connect as closely as
possible to the load point. Sensing along a
high-current load trace will degrade DC load
regulation. If external feedback resistors are
used, they should be placed as closely as pos-
sible to the FB pin. This prevents noise from
being coupled into the high impedance feed-
back node.
4. The resistance of the trace from the load return
to GND should be kept to a minimum. This will
help to minimize any error in DC regulation due
to differences in the potential of the internal sig-
nal ground and the power ground.
5. For good thermal coupling, PCB vias are
required from the pad for the TDFN paddle to the
ground plane. The via diameter should be 0.3mm
to 0.33mm and positioned on a 1.2mm grid.
6.
LDO bypass capacitor (C5) should be connected
directly between pins 7 (BYP) and 8 (GND)
T
J(MAX)
=
P
TOTAL
·
Θ
JA
+ T
AMB
P
TOTAL
= I
OBUCK
2
· R
DSON(HS)
+ I
OLDO
· (V
IN
- V
OLDO
)
+ (I
QBUCK
+ I
QLDO
) · V
IN
P
TOTAL
I
OBUCK
2
· (R
DSON(HS)
· V
OBUCK
+ R
DSON(LS)
· [V
IN
- V
OBUCK
])
V
IN
=
+ (t
sw
· F · I
OBUCK
+ I
QBUCK
+ I
QLDO
) · V
IN
+ I
OLDO
· (V
IN
- V
OLDO
)
AAT2506
1MHz Step-Down Converter/LDO Regulator
2506.2006.05.1.3
19
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT2506IWP-AQ-T1 | 1MHz Step-Down Converter/LDO Regulator |
| AAT2506IWP-AW-T1 | 1MHz Step-Down Converter/LDO Regulator |
| AAT2511 | Dual 600mA, 1MHz Step-Down DC/DC Converter |
| AAT2511_0605 | Dual 600mA, 1MHz Step-Down DC/DC Converter |
| AAT2511IWP-AA-T1 | Dual 600mA, 1MHz Step-Down DC/DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT2506IWP-AQ-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz Step-Down Converter/LDO Regulator |
| AAT2506IWP-AW-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz Step-Down Converter/LDO Regulator |
| AAT2510 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Dual 400mA, 1MHz Step-Down DC-DC Converter |
| AAT2510_06 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Dual 400mA, 1MHz Step-Down DC-DC Converter |
| AAT2510IWP-AA-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Dual 400mA, 1MHz Step-Down DC-DC Converter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。