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参数资料
| 型号： | MAX1651 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers |
| 中文描述： | 5V/3.3V或可调、高效率、低压差、降压型DC-DC控制器 |
| 文件页数： | 1/12页 |
| 文件大小： | 167K |
| 代理商： | MAX1651 |
_______________General Desc ription
The MAX1649/MAX1651 BiCMOS, step-down, DC-DC
switching controllers provide high efficiency over loads
ranging from 1mA to more than 2.5A. A unique, current-
limited pulse-frequency-modulated (PFM) control scheme
gives these devices the benefits of pulse-width-modula-
tion (PWM) converters (high efficiency at heavy loads),
while using only 100μA of supply current (vs. 2mA to
10mA for PWM converters). Dropout performance down
to 300mV is provided by a high switch duty cycle (96.5%)
and a low current-sense threshold (110mV).
A high switching frequency (up to 300kHz) allows these
devices to use miniature external components.
The MAX1649/MAX1651 have dropout voltages less
than 0.3V at 500mA and accept input voltages up to
16V. Output voltages are preset at 5V (MAX1649), or
3.3V (MAX1651). They can also be adjusted to any
voltage from 1.5V to the input voltage by using two
resistors.
These step-down controllers drive external P-channel
MOSFETs at loads greater than 12.5W. If less power is
required, use the MAX639/MAX640/MAX653 step-down
converters with on-chip FETs, which allow up to a
225mA load current.
________________________Applic ations
PDAs
High-Efficiency Step-Down Regulation
5V-to-3.3V Green PC Applications
Battery-Powered Applications
____________________________Features
o
More than 90% Efficiency (10mA to 1.5A Loads)
o
More than 12.5W Output Power
o
Less than 0.3V Dropout Voltage at 500mA
o
100μA Max Quiescent Supply Current
o
5μA Max Shutdown Supply Current
o
16V Max Input Voltage
o
5V (MAX1649), 3.3V (MAX1651), or Adjustable
Output Voltage
o
Current-Limited Control Scheme
o
Up to 300kHz Switching Frequency
o
Up to 96.5% Duty Cycle
______________Ordering Information
* Dice are tested at T
A
= +25°C.
M
5V /3.3V or Adjustable, High-Effic ienc y,
Low-Dropout, S tep-Down DC-DC Controllers
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
1
2
3
4
8
7
6
5
GND
EXT
CS
V+
REF
SHDN
FB
OUT
DIP/SO
TOP VIEW
MAX1649
MAX1651
__________________Pin Configuration
__________Typic al Operating Circ uit
19-0305; Rev 2; 9/95
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
MAX1649
CPA
MAX1649CSA
MAX1649C/D
MAX1649EPA
MAX1649ESA
MAX1651
CPA
MAX1651CSA
MAX1651C/D
MAX1651EPA
MAX1651ESA
MAX1651
SHDN
V+
CS
FB
GND
ON/OFF
P
EXT
REF
OUT
OUTPUT
3.3V
INPUT
3.6V TO 16V
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1649EPA | 5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers |
| MAX1649ESA | Circular Connector; Body Material:Aluminum Alloy; Series:D38999; No. of Contacts:100; Connector Shell Size:23; Connecting Termination:Grounded; Gender:Male |
| MAX1649 | 5V/3.3V or Adjustable, High-Efficiency,Low-Dropout, Step-Down DC-DC Controllers(5V或可调,降压型，输出电流2A,DC-DC变换器,MAX649的改进型) |
| MAX1651CPA | 5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers |
| MAX1651CSA | 5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controllers |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1651CPA | 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 |
| MAX1651CSA | 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 |
| MAX1651CSA+ | 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 |
| MAX1651CSA+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 |
| MAX1651CSA-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 |
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