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参数资料
| 型号： | MAX772CSA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 300kHz |
| 占空比： | 90% |
| 电源电压： | 3 V ~ 16.5 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
5V/12V/15V or Adjustable, High-Efficiency,
Low I Q , Step-Up DC-DC Controllers
V IN = 3V
V IN = 5V
C2
0.1 μ F
2
C2
0.1 μ F
2
C3
0.1 μ F
5 REF
4 SHDN
V+
MAX770
L1
22 μ H
C1
100 μ F
D1
1N5817
V OUT = 5V
@ 1A
C3
0.1 μ F
5 REF
4 SHDN
V+
MAX771
L1
22 μ H
C1
68 μ F
D1
1N5817
V OUT = 12V
@ 0.5A
3 FB
EXT
1
N
3 FB
EXT
1
N
MTP3055EL
Si9410DY
6 AGND
CS
8
6 AGND
CS
8
GND
R SENSE
75m ?
C4
300 μ F
GND
R SENSE
100m ?
C4
200 μ F
7
Figure 2a. 5V Preset Output, Bootstrapped
V IN = 5V
7
Figure 2b. 12V Preset Output, Bootstrapped
V IN = 4V
4 SHDN MAX770
4 SHDN MAX770
C1
68 μ F
C3
0.1 μ F
C2
0.1 μ F
2
V+
5 REF
MAX771
MAX772
6 AGND
EXT
CS
1
8
L1
22 μ H
D1
1N5817
N
V OUT = 12V
@ 0.5A
C4
200 μ F
C3
0.1 μ F
C2
0.1 μ F
5 REF
6
AGND
2
V+
MAX771
MAX772
EXT
CS
1
8
L1
20 μ H
C1
47 μ F
D1
1N5817
N
Si9410DY
V OUT = 9V
C4
100 μ F
FB
3
R SENSE
100m ?
R2
127k
FB
3
R SENSE
R2
140k
GND
7
R1
18k
GND
7
R1
28k
( V V OUT -1 )
( V V OUT -1 )
R2 = (R1)
REF
V REF = 1.5V
Figure 2c. 12V Output, Non-Bootstrapped
frequencies (up to 300kHz), allowing the use of tiny
external components.
As with traditional PFM converters, the power transistor
is not turned on until the voltage comparator senses
that the output is out of regulation. However, unlike tra-
ditional PFM converters, the MAX770–MAX773 switch
using the combination of a peak current limit and a pair
of one-shots that set the maximum on-time (16μs) and
R2 = (R1)
REF
V REF = 1.5V
Figure 2d. 9V Output, Bootstrapped
minimum off-time (2.3μs); there is no oscillator. Once
off, the minimum off-time one-shot holds the switch
off for 2.3μs. After this minimum time, the switch either
1) stays off if the output is in regulation, or 2) turns on
again if the output is out of regulation.
The control circuitry allows the ICs to operate in contin-
uous-conduction mode (CCM) while maintaining high
efficiency with heavy loads. When the power switch is
10
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相关代理商/技术参数 |
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|---|---|
| MAX772CSA+ | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up DC/DC Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX772CSA+T | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up DC/DC Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX772CSA-T | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up DC/DC Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX772EPA | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up DC/DC Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX772ESA | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up DC/DC Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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