參數(shù)資料
型號(hào)： MAX1875AEEG
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： Dual 180∑ Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR
中文描述： DUAL SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO24
封裝： 0.150 INCH, 0.25 INCH PITCH, MO-137AE, QSOP-24
文件頁(yè)數(shù)： 12/21頁(yè)
文件大小： 493K
代理商： MAX1875AEEG
M
where t
ON(MIN)
is 100ns. The minimum input voltage is
limited by the switching frequency and minimum off-
time, which determine the maximum duty cycle
(D
MAX
= 1 - f
SW
t
OFF(MIN)
):
where V
DROP1
is the sum of the parasitic voltage drops
in the inductor discharge path, including synchronous
rectifier, inductor, and PC board resistances. V
DROP2
is
the sum of the resistances in the charging path, includ-
ing high-side switch, inductor, and PC board resis-
tances.
Setting the Output Voltage
For 1V or greater output voltages, set the MAX1875/
MAX1876 output voltage by connecting a voltage-
divider from the output to FB_ to GND (Figure 6). Select
R_B (FB_ to GND resistor) to between 1k
and 10k
.
Calculate R_A (OUT_ to FB_ resistor) with the following
equation:
where V
SET
= 1V (see the
Electrical Characteristics
)
and V
OUT
can range from V
SET
to 18V.
For output voltages below 1V, set the MAX1875/
MAX1876 output voltage by connecting a voltage-
divider from the output to FB_ to REF (Figure 6). Select
R_C (FB to REF resistor) in the 1k
to 10k
range.
Calculate R_A with the following equation:
where V
SET
= 1V, V
REF
= 2V (see the
Electrical
Characteristics
), and V
OUT
can range from 0 to V
SET
.
R A
_
R C
_
V
V
V
V
-
SET
REF
OUT
SET
=
-
R A
_
R B
_
V
V
OUT
SET
=
-1
V
V
1-
V
f
V
V
IN MIN
(
OUT
SW OFF MIN
DROP
(
DROP
DROP
)
)
=
+
+
1
2
1
-
Dual 180° Out-of-Phase PWM Step-
Down Controllers with POR
12
______________________________________________________________________________________
I
I
LIMIT
I
LOAD
0
TIME
-I
PEAK
Figure 4.
“
Valley
”
Current-Limit Threshold Point
SYNC
SLAVE
OSC
SYNC
CK0
MASTER
V
L
4-PHASE SYSTEM
2-PHASE SYSTEM
DH1
DH2
DH1
DH2
MASTER
SLAVE
180
°
PHASE SHIFT
90
°
PHASE SHIFT
DH1
DH2
DH1
DH2
MASTER
SLAVE
MAX1875
SYNC
SLAVE
OSC
OSC
SYNC
CK0
MASTER
V
L
MAX1875
MAX1875
Figure 5. Synchronized Controllers
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1875AEEG+ 功能描述:電壓模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
MAX1875AEEG+T 功能描述:電壓模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
MAX1875AEEG-T 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1875EEG 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1875EEG+ 功能描述:電壓模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
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