參數(shù)資料
型號： MAX668EUB
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.8V to 28V Input, PWM Step-Up Controllers in レMAX
中文描述： SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, PDSO10
封裝： COMPACT, UMAX-10
文件頁數(shù)： 11/18頁
文件大?。?/td> 326K
代理商： MAX668EUB
Non-Bootstrapped Operation
With non-bootstrapped operation, the IC is powered
from the input voltage (V
IN
) or another source, such as
a logic supply. Non-bootstrapped operation (Figure 4)
is recommended (but not required) for input voltages
above 5V, since the EXT amplitude (limited to 5V by
LDO) at this voltage range is no higher than it would be
with bootstrapped operation. Note that non-boot-
strapped operation is required if the output voltage
exceeds 28V, since this level is too high to safely con-
nect to V
CC
. Also note that
only the MAX668 can be
used with non-bootstrapped operation
.
If the input voltage does not exceed 5.5V, the on-chip
regulator can be disabled by connecting V
CC
to LDO
(Figure 5). This eliminates the regulator forward drop
and supplies the maximum gate drive to the external
FET for lowest on-resistance. Disabling the regulator
also reduces the non-bootstrapped minimum input volt-
age from 3V to 2.7V.
M
1.8V to 28V Input, PWM Step-Up
Controllers in μMAX
______________________________________________________________________________________
11
MAX668
LDO
CS+
REF
FREQ
V
CC
SYNC/
SHDN
PGND
FB
GND
N1
EXT
V
IN
= 2.7V to 5.5V
C3
0.22
μ
F
C2
1
μ
F
R4
100k
1%
R1
0.02
R2
218k
1%
R3
24.9k
1%
C7
220pF
D1
MBRS340T3
FDS6680
C4
68
μ
F
20V
C5
68
μ
F
20V
C6
0.1
μ
F
3
5
7
6
8
2
4
9
1
10
V
OUT
= 12V @ 1A
C1
68
μ
F
10V
L1
4.7
μ
H
Figure 5. MAX668 Low-Voltage Non-Bootstrapped Configuration
MAX668
LDO
CS+
REF
FREQ
V
CC
PGND
FB
GND
N1
EXT
V
IN
= 3V to 12V
C3
0.22
μ
F
C4
1
μ
F
C2
0.1
μ
F
R4
100k
1%
R1
0.02
R2
218k
1%
R3
24.9k
1%
C7
220pF
D1
MBRS340T3
FDS6680
C5
68
μ
F
20V
C6
68
μ
F
20V
C8
0.1
μ
F
3
5
7
6
8
2
4
9
1
10
V
OUT
= 12V @ 1A
C1
68
μ
F
20V
L1
4.7
μ
H
SYNC/
SHDN
Figure 4. MAX668 High-Voltage Non-Bootstrapped Configuration
相關(guān)PDF資料
PDF描述
MAX6687AU75H Local/Remote Temperature Switches in a レMAX Package
MAX6687AU40H Local/Remote Temperature Switches in a レMAX Package
MAX6688AU40H Local/Remote Temperature Switches in a レMAX Package
MAX6687AU40L Local/Remote Temperature Switches in a レMAX Package
MAX6688AU40L Local/Remote Temperature Switches in a レMAX Package
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX668EUB 制造商:Maxim Integrated Products 功能描述:PWM STEP UP CONTROLLER SMD SOIC10
MAX668EUB+ 功能描述:電流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX668EUB+T 功能描述:電流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX668EUB-T 功能描述:電流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX668EVKIT 功能描述:電源管理IC開發(fā)工具 Evaluation Kit for the MAX668 MAX669 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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