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参数资料
| 型号： | MAX608ESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12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： | 2,500 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 300kHz |
| 占空比： | 85% |
| 电源电压： | 1.8 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： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
5V or Adjustable, Low-Voltage,
Step-Up DC-DC Controller
V IN = 2V
V IN = 2V
C3
0.1 μ F
C2
0.1 μ F
5 REF
4 SHDN
2
OUT
MAX608
L1
22 μ H
C1
150 μ F
D1
1N5817
V OUT = 5V
@ 0.5A
C3
0.1 μ F
C2
0.1 μ F
2
OUT
5 REF
4 SHDN MAX608
EXT
1
L1
22 μ H
C1
150 μ F
D1
1N5817
N
MMFT3055EL
V OUT = 12V
@ 0.3A
C4
200 μ F
3 FB
6 AGND
GND
EXT
CS
1
8
N
MMFT3055EL
R SENSE
50m ?
C4
200 μ F
6
AGND
GND
7
CS
FB
8
3
R SENSE
50m ?
R1
58k
R2
402k
7
R2 = (R1)
REF
( V OUT -1 )
V REF = 1.5V
Figure 2a. 5V Preset Output
_______________Detailed Description
Figure 2b. 12V Output
V IN = 2V
4 SHDN MAX608
( V V OUT -1 )
The MAX608 is a BiCMOS, step-up, switch-mode pow-
er-supply controller that provides a preset 5V output, in
addition to adjustable-output operation. Its unique con-
trol scheme combines the advantages of pulse-frequen-
cy modulation (low supply current) and pulse-width
modulation (high efficiency with heavy loads), providing
high efficiency over a wide output current range, as well
as increased output current capability over previous
PFM devices. In addition, the external sense resistor
and power transistor allow the user to tailor the output
current capability for each application. Figure 1 shows
the MAX608 functional diagram. The device has a shut-
down mode that reduces the supply current to 5μA
max.
Figure 2 shows the standard application circuits. The
IC is powered from the output, and the input voltage
range is 1.8V to V OUT (this configuration is commonly
C2
0.1 μ F
5 REF
C3
0.1 μ F
6
AGND
R2 = (R1)
REF
V REF = 1.5V
2
OUT
GND
7
EXT
CS
FB
1
8
3
L1
22 μ H
C1
150 μ F
D1
1N5817
N
SI6426
R SENSE
50m ?
R1
50k
V OUT = 3.3V
@ 0.6A
C4
200 μ F
R2
60k
C5
47pF
known as bootstrap operation). The voltage applied to
the gate of the external power transistor is switched
from V OUT to ground.
The MAX608’s output voltage can be set to 5V by con-
necting FB to ground; it can also be adjusted from 3V
to 16.5V using external resistors. Use 1% external feed-
back resistors when operating in adjustable-output
mode (Figures 2b, 2c) to achieve an overall output volt-
age accuracy of ±5%.
Figure 2c. 3.3V Output
PFM Control Scheme
The MAX608 uses a proprietary current-limited PFM con-
trol scheme to provide high efficiency over a wide range
of load currents. This control scheme combines the ultra-
low supply current of PFM converters (or pulse skippers)
with the high full-load efficiency of PWM converters.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX608EVKIT | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Evaluation Kit for the MAX608 |
| MAX608EVKIT-SO | 功能描述:DC/DC 开关控制器 5V or Adjustable Low-Voltage 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 |
| MAX608IPA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Analog IC |
| MAX608ISA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Analog IC |
| MAX609CSE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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