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| 型号： | MAX1649ESA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/12页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK 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： | 96.5% |
| 电源电压： | 3 V ~ 16 V |
| 降压： | 是 |
| 升压： | 无 |
| 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： | 管件 |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
5V/3.3V or Adjustable, High-Efficiency,
Low-Dropout, Step-Down DC-DC Controllers
Table 2. Component Suppliers
Layout Considerations
Proper PC board layout is essential because of high
COMPANY
PHONE
(207) 282-5111
FAX
current levels and fast switching waveforms that radi-
ate noise. Minimize ground noise by connecting the
AVX
USA
or
(207) 283-1941
anode of the rectifier, the input bypass capacitor
(800) 282-4975
ground lead, and the output filter capacitor ground
Coiltronics
Coilcraft
Dale
International
Rectifier
IRC
Motorola
Nichicon
Nihon
Sanyo
Siliconix
Sprague
Sumida
USA
USA
USA
USA
USA
USA
USA
Japan
USA
Japan
USA
Japan
USA
USA
USA
Japan
(516) 241-7876
(708) 639-6400
(402) 564-3131
(310) 322-3331
(512) 992-7900
(602) 244-3576
or
(602) 244-5303
(708) 843-7500
81-7-5231-8461
(805) 867-2555
81-3-3494-7411
(619) 661-6835
81-7-2070-6306
(408) 988-8000
or
(800) 554-5565
(603) 224-1961
(708) 956-0666
81-3-3607-5111
(516) 241-9339
(708) 639-1469
(402) 563-1841
(310) 322-3332
(512) 992-3377
(602) 244-4015
(708) 843-2798
81-7-5256-4158
(805) 867-2556
81-3-3494-7414
(619) 661-1055
81-7-2070-1174
(408) 970-3950
(603) 224-1430
(708) 956-0702
81-3-3607-5144
lead to a single point (“star” ground configuration). A
ground plane is recommended. Also minimize lead
lengths to reduce stray capacitance, trace resistance,
and radiated noise. In particular, the traces connected
to FB (if an external resistor divider is used) and EXT
must be short. Place the 0.1μF ceramic bypass capac-
itor as close as possible to the V+ and GND pins.
MAX1649/MAX1651 vs. MAX649/MAX651
The MAX1649 and MAX1651 are pin compatible with
the MAX649 and MAX651, but have been optimized for
improved dropout performance and efficiency—partic-
ularly with low input voltages. The MAX1649/MAX1651
feature increased maximum switch duty cycle (96.5%)
and reduced current-limit sense voltage (110mV).
Their predecessors, the MAX649/MAX651, use a high-
er two-step (210mV/110mV) current-limit sense voltage
to provide tighter current-sense accuracy and reduced
inductor peak current at light loads.
___________________Chip Topography
United
Chemi-Con
USA
(714) 255-9500
(714) 255-9400
OUT
GND
Input Bypass Capacitor
The input bypass capacitor reduces peak currents
drawn from the voltage source, and also reduces the
amount of noise at the voltage source caused by the
switching action of the MAX1649/MAX1651. The input
voltage source impedance determines the size of the
capacitor required at the V+ input. As with the output fil-
ter capacitor, a low-ESR capacitor is recommended.
Bypass the IC separately with a 0.1μF ceramic capac-
FB
EXT
0.106"
(2.692mm)
itor placed close to the V+ and GND pins.
Reference Capacitor
Bypass REF with a 0.1μF or larger capacitor.
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages .
SHDN
REF
0.081"
(2.057mm)
CS
V+
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
8 PDIP
8 SO
P8-2
S8-4
TRANSISTOR COUNT: 428
SUBSTRATE CONNECTED TO V+
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1649ESA+ | 功能描述:DC/DC 开关控制器 5/3.3/Adj Low-Drop Step-Down 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 |
| MAX1649ESA+T | 功能描述:DC/DC 开关控制器 5/3.3/Adj Low-Drop Step-Down 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 |
| MAX1649ESA-T | 功能描述:DC/DC 开关控制器 5/3.3/Adj Low-Drop Step-Down 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 |
| MAX1649EVKIT | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX649 MAX651 MAX652 and MAX1649 MAX1651 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 |
| MAX1649EVKIT-SO | 功能描述:DC/DC 开关控制器 3V or Adjustable High-Efficiency Low-Dropout Step-Down 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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