参数资料
型号: MAX668EUB
厂商: Maxim Integrated Products
文件页数: 11/18页
文件大小: 0K
描述: IC REG CTRLR PWM HYBRID 10-UMAX
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 50
PWM 型: 电流模式,混合
输出数: 1
频率 - 最大: 575kHz
占空比: 94%
电源电压: 3 V ~ 28 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
包装: 管件
其它名称: Q1513668
MAX668/MAX669
1.8V to 28V Input, PWM Step-Up
Controllers in μMAX
V IN = 3V to 12V
C1
68 μ F
20V
L1
4.7 μ H
C4
1 μ F
C2
0.1 μ F
C3
0.22 μ F
1
LDO
9
V CC
10 SYNC/
SHDN
4
REF
2
FREQ
MAX668
EXT
CS+
PGND
FB
GND
8
6
7
5
3
R1
0.02 ?
N1 D1
MBRS340T3
FDS6680
C5
68 μ F
20V
C7
220pF
C6
68 μ F
20V
R2
218k
1%
R3
24.9k
1%
C8
0.1 μ F
V OUT = 12V @ 1A
R4
100k
1%
Figure 4. MAX668 High-Voltage Non-Bootstrapped Configuration
V IN = 2.7V to 5.5V
C1
68 μ F
10V
L1
4.7 μ H
C2
1 μ F
C3
0.22 μ F
1
LDO
9
V CC
10 SYNC/
SHDN
4
REF
2
FREQ
MAX668
EXT
CS+
PGND
FB
GND
8
6
7
5
3
R1
0.02 ?
N1 D1
MBRS340T3
FDS6680
C4
68 μ F
20V
C7
220pF
C5
68 μ F
20V
R2
218k
1%
R3
24.9k
1%
C6
0.1 μ F
V OUT = 12V @ 1A
R4
100k
1%
Figure 5. MAX668 Low-Voltage Non-Bootstrapped Configuration
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-
Maxim Integrated
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.
11
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相关代理商/技术参数
参数描述
MAX668EUB 制造商:Maxim Integrated Products 功能描述:PWM STEP UP CONTROLLER SMD SOIC10
MAX668EUB+ 功能描述:电流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX668EUB+T 功能描述:电流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX668EUB-T 功能描述:电流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX668EVKIT 功能描述:电源管理IC开发工具 Evaluation Kit for the MAX668 MAX669 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V