Datasheet 搜索 > 稳压芯片 > Maxim Integrated（美信） > MAX1651CSA+T 数据手册 > MAX1651CSA+T 数据手册 1/12 页
器件3D模型￥ 25.171
MAX1651CSA+T 数据手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
分类:
稳压芯片
封装:
SOIC-8
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
导航目录
MAX1651CSA+T数据手册
Page:
of 12 Go
若手册格式错乱，请下载阅览PDF原文件
_______________General Description
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.
________________________Applications
PDAs
High-Efficiency Step-Down Regulation
5V-to-3.3V Green PC Applications
Battery-Powered Applications
____________________________Features
♦ More than 90% Efficiency (10mA to 1.5A Loads)
♦ More than 12.5W Output Power
♦ Less than 0.3V Dropout Voltage at 500mA
♦ 100µA Max Quiescent Supply Current
♦ 5µA Max Shutdown Supply Current
♦ 16V Max Input Voltage
♦ 5V (MAX1649), 3.3V (MAX1651), or Adjustable
Output Voltage
♦ Current-Limited Control Scheme
♦ Up to 300kHz Switching Frequency
♦ Up to 96.5% Duty Cycle
______________Ordering Information
*Dice are tested at T
A
= +25°C.
MAX1649/MAX1651
5V/3.3V or Adjustable, High-Efficiency,
Low-Dropout, Step-Down DC-DC Controllers
________________________________________________________________ Maxim Integrated Products 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
__________Typical Operating Circuit
19-0305; Rev 3; 3/09
PART TEMP RANGE PIN-PACKAGE
MAX1649CPA
0°C to +70°C 8 Plastic DIP
MAX1649CSA 0°C to +70°C 8 SO
MAX1649C/D 0°C to +70°C Dice*
MAX1649EPA -40°C to +85°C 8 Plastic DIP
MAX1649ESA -40°C to +85°C 8 SO
MAX1651
V+
CSSHDN
FB GND
ON/OFF
P
EXT
REF
OUT
OUTPUT
3.3V
INPUT
3.6V TO 16V
MAX1651CPA
0°C to +70°C 8 Plastic DIP
MAX1651CSA 0°C to +70°C 8 SO
MAX1651C/D 0°C to +70°C Dice*
MAX1651EPA -40°C to +85°C 8 Plastic DIP
MAX1651ESA -40°C to +85°C 8 SO
EVALUATION KIT
AVAILABLE
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
