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參數(shù)資料
| 型號： | MAX618EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.3-V ABT Scan Test Devices With 18-Bit Universal Bus Transceivers 68-CFP -55 to 125 |
| 中文描述： | 3 A SWITCHING REGULATOR, 312 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 204K |
| 代理商： | MAX618EEE |
M
28V, PWM, S tep-Up DC-DC Converter
8
_______________________________________________________________________________________
GND
LX
C
OUT
L
PGND
R2
R1
C
P
VL
COMP
C
COMP
IN
SHDN
UP TO28V
V
UP TO28V
C
IND
IN
OUT
MAX618
2.7V TO5.5V
4.7
μ
F
1
μ
F
FB
LX
C
IND
C
OUT
L
PGND
GND
R1
VL
COMP
C
COMP
IN
SHDN
UP TO28V
V
UP TO28V
OUT
MAX618
IN
3V TO28V
4.7
μ
F
1
μ
F
R2
C
P
FB
Figure 3. Dual-Supply Operation (V
IN
= 2.7V to 5.5V)
Figure 4. Dual-Supply Operation (V
IN
= 3V to 28V)
Table 2. Input Configurations
VL can be overdriven by an external supply between
2.7V and 5.5V. In systems with +3.3V or +5V logic
power supplies available, improve efficiency by power-
ing VL and V
IN
directly from the logic supply as shown
in Figure 3.
Operating Configurations
The MAX618 can be connected in one of three configura-
tions described in Table 2 and shown in Figures 1, 3, and
4. The VL linear regulator allows operation from a single
supply between +3V and +28V as shown in Figure 1.
The circuit in Figure 3 allows a logic supply to power
the MAX618 while using a separate source for DC-DC
conversion power (inductor voltage). The logic supply
(between 2.7V and 5.5V) connects to VL and IN. VL =
IN; voltages of 3.3V or more improve efficiency by pro-
viding greater gate drive for the internal MOSFET.
The circuit in Figure 4 allows separate supplies to
power IN and the inductor voltage. It differs from the
connection in Figure 3 in that the MAX618 chip supply
is not limited to 5.5V.
CIRCUIT
Figure 1
Input voltage connects
to IN and inductor.
CONNECTION
V
IN
RANGE
3V to V
OUT
(up to 28V)
V
IN
INDUCTOR
VOLTAGE
BENEFITS/COMMENTS
Single-supply operation.
SHDN
must be connected to or pulled up to VL. On/off
control requires an open-drain or open-collector connection
to
SHDN.
Figure 3
Figure 4
0 to V
OUT
(up to 28V)
0 to V
OUT
(up to 28V)
Increased efficiency.
SHDN
can be driven by logic powered from the supply con-
nected to IN and VL, or can be connected to or pulled up to
VL.
Input power source (inductor voltage) is separate from the
MAX618’s bias (V
IN
= VL) and can be less than or greater
than V
IN
.
Input power source (inductor voltage) is separate from the
MAX618’s bias (V
IN
) and can be less than or greater than
V
IN
.
SHDN
must be connected to or pulled up to VL. On/off
control requires an open-drain or open-collector connection
to
SHDN.
IN and inductor volt-
age supplied by sepa-
rate sources.
IN and VL connect
together. Inductor volt-
age supplied by a
separate source.
2.7V to 5.5V
3V to 28V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX618EEE/GG8 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX618EEE/GH9 | 制造商:Maxim Integrated Products 功能描述:STEP-UP DC-DC CONVERTER - Rail/Tube |
| MAX618EEE/V+T | 制造商:Maxim Integrated Products 功能描述:28V, PWM, STEP-UP DC-DC CONVERTER - Tape and Reel |
| MAX618EEE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 28V PWM Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX618EEE+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 28V PWM Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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