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参数资料
型号： MAX1623
厂商： Maxim Integrated Products, Inc.
英文描述： 3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches
中文描述： 3A、低电压、降压型稳压器，内置同步整流与开关
文件页数： 1/12页
文件大小： 164K
代理商： MAX1623
M
3A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
EFOLLOWS DATA SHEET
General Description
The MAX1623 switch-mode buck regulator with syn-
chronous rectification provides local CPU and bus-ter-
mination power in notebook and desktop computers.
An internal 55m
(typ), 3A PMOS power switch and
60m
(typ), 3A NMOS synchronous-rectifier switch
deliver continuous load currents up to 3A from a 5V
supply with 95% typical efficiency. Output accuracy is
±1%, including line and load regulation.
The MAX1623 features constant-off-time, current-mode
pulse-width-modulation (PWM) control with switching
frequencies as high as 350kHz. An external resistor at
the TOFF pin sets the off-time, allowing optimum design
flexibility in terms of switching frequency, output switch-
ing noise, and inductor size. This device is available in
a space-saving 20-pin SSOP package.
________________________Applications
5V to 3.3V Conversion
Notebook Computer CPU I/O Supply
Desktop Computer Bus-Termination Supply
CPU Daughter Card Supply
DSP Supply
____________________________Features
o
±1% Output Accuracy, Including Line and Load
Regulation
o
94% Efficiency
o
Internal Switches
55m
PMOS Power Switch
60m
NMOS Synchronous-Rectifier Switch
o
Guaranteed 3A Load Capability
o
Minimal External Components
o
Pin-Selectable Fixed 3.3V, 2.5V, or
Adjustable (1.1V to 3.8V) Output Voltage
o
+4.5V to +5.5V Input Voltage Range
o
400μA (typ) Supply Current
o
<1μA Shutdown Supply Current
o
Constant-Off-Time PWM Operation
o
Switching Frequencies Up to 350kHz
o
Idle Mode
Operation at Light Loads
o
Thermal Shutdown Protection
o
Available in 20-Pin SSOP
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
LX
PGND
LX
PGND
IN
LX
IN
LX
TOP VIEW
LX
PGND
V
CC
COMP
FBSEL
IN
LX
12
11
9
10
REF
GND
FB
TOFF
MAX1623
SSOP
SHDN
Pin Configuration
+5V
INPUT
MAX1623
+2.5V
OUTPUT
IN
LX
PGND
GND
REF
FB
COMP
FBSEL
V
CC
TOFF
SHDN
Typical Operating Circuit
19-1436; Rev 1; 9/99
PART
MAX1623EAP
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
20 SSOP
Ordering Information
Idle Mode is a trademark of Maxim Integrated Products.
相关PDF资料
PDF描述
MAX1623EAP 3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches
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相关代理商/技术参数
参数描述
MAX1623EAP 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX1623EA-P 制造商:Maxim Integrated Products 功能描述:
MAX1623EAP+ 功能描述:直流/直流开关调节器 3A Step-Down w/Synch Rectification RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX1623EAP+T 功能描述:直流/直流开关调节器 3A Step-Down w/Synch Rectification RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MAX1623EAP-T 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
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