- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359155 > MCZ34701EWR2 (飛思卡爾半導(dǎo)體(中國)有限公司) 1.5A Switch-Mode Power Supply with Linear Regulator PDF資料下載
參數(shù)資料
| 型號： | MCZ34701EWR2 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | 1.5A Switch-Mode Power Supply with Linear Regulator |
| 中文描述： | 1.5A的開關(guān)模式電源，線性穩(wěn)壓器 |
| 文件頁數(shù)： | 31/39頁 |
| 文件大?。?/td> | 528K |
| 代理商： | MCZ34701EWR2 |
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頁當(dāng)前第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁
Analog Integrated Circuit Device Data
Freescale Semiconductor
31
34701
TYPICAL APPLICATIONS
.
Figure 30. Buck Control Loop Bode Plot
The frequency of the zero created by the ESR of the output
capacitor C
O
is calculated as:
Where C
O
is the value of the buck regulator output
capacitor, and ESR is the equivalent series resistance of the
output capacitor.
The frequency of the compensating network pole can be
calculated as follows:
The well designed and compensated buck regulator
should yield at least 45 deg. phase margin
Φ
m
of its overall
loop as depicted in the
Figure 30
, page
31
.
Selecting Buck Regulator Output Voltage
The 34701 buck regulator output voltage can be set by
selecting the right value of the resistors R1, R2 and R4, and
can be determined from the following formula (see
Figure 29
,
page
30
for the component references):
Where V
Ref
is the buck regulator reference voltage
(V
Ref
= 0.8V typ.) at the INV pin,
V
O
is the selected output voltage,
I
O
is the output load current,
R
L
is the DC resistance of the inductor L.
It is apparent that the buck regulator output voltage is
affected by the voltage drop caused by the inductor serial
resistance and the regulator output current. In those
applications which do not require precise output voltage,
setting the formula for calculating selected output voltage can
be simplified as follows:
Linear Regulator Output Voltage
The output voltage of the linear regulator (LDO) can be set
by a simple resistor divider according to the following formula:
Where V
Ref
is the linear regulator reference voltage
(V
Ref
= 0.8V typ.) at the LFB pin,
V
LDO
is the LDO selected output voltage,
R
U
is the “upper” resistor of the LDO resistor divider,
R
L
is the “l(fā)ower” resistor of the LDO resistor divider.
Figure 31
describes the 34701 linear regulator circuit with
the resistor divider R
U
, R
L
setting the output voltage V
LDO
.
Figure 31. 34701Linear Regulator Circuit
Φ
m
0
-20
20
-40
-270
-360
-180
10
100
1000
1.0
Frequency [kHz]
Gain
[dB]
fLC
fz(c)
fBW
fz(ESR)fp(FF)
fp(c)
10000
Phase
[Deg.]
f
z ESR
)
2
π
C
O
ESR
------------1
=
f
p c
( )
R1
+
2
π
C2
R3
)
----R1R3
-----------------1
=
R2
V
Ref
V
------------+
I
R
×
R4
(
)
–
V
--------–
V
R1
+
-V
×
=
R2
V
Ref
V
O
V
Ref
–
(
)
R1
R4
R4
+
×
-R1
)
×
------------------------------1
×
=
V
LDO
V
Ref
1
R
U
R
L
-------
+
×
=
LDRV
CS
LDO
LFB
MC34701
2.8 V to 6.0 V Input
VIN1
RS
RU
RL
CLDO
VLDO
LCMP
LDO
Compensation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCZ79076EG | Electronic Ignition Control Circuit |
| MD-S5007 | Analog IC |
| MD-S5008 | Analog IC |
| MD-S5010 | Analog IC |
| MD100 | Analog IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ34702EW | 功能描述:低壓差穩(wěn)壓器 - LDO QUICCSUPPLY 2 RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MCZ34702EWR2 | 功能描述:低壓差穩(wěn)壓器 - LDO QUICCSUPPLY 2 RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MCZ36304201 | 制造商:LG Corporation 功能描述:Duct |
| MCZ36305001 | 制造商:LG Corporation 功能描述:Duct |
| MCZ36444401 | 制造商:LG Corporation 功能描述:Duct |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。