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參數資料
| 型號： | MAX744ACWE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 5V, Step-Down, Current-Mode PWM DC-DC Converters |
| 中文描述： | 2 A SWITCHING REGULATOR, 212.5 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, SOP-16 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 229K |
| 代理商： | MAX744ACWE |
__________________General Desc ription
The MAX730A/MAX738A/MAX744A are 5V-output
CMOS, step-down switching regulators. The MAX738A/
MAX744A accept inputs from 6V to 16V and deliver
750mA. The MAX744A guarantees 500mA load capa-
bility for inputs above 6V and has tighter oscillator fre-
quency limits for low-noise (radio) applications. The
MAX730A accepts inputs between 5.2V and 11V and
delivers 450mA for inputs above 6V. Typical efficien-
cies are 85% to 96%. Quiescent supply current is
1.7mA and only 6μA in shutdown.
Pulse-width modulation (PWM) current-mode control
provides precise output regulation and excellent tran-
sient responses. Output voltage accuracy is guaran-
teed to be ±5% over line, load, and temperature varia-
tions. Fixed-frequency switching allows easy filtering of
output ripple and noise, as well as the use of small
external components. These regulators require only a
single inductor value to work in most applications, so
no inductor design is necessary.
The MAX730A/MAX738A/MAX744A also feature cycle-
by-cycle current limiting, overcurrent limiting, undervolt-
age lockout, and programmable soft-start protection.
___________________________Applic ations
Portable Instruments
Cellular Phones and Radios
Personal Communicators
Distributed Power Systems
Computer Peripherals
________________________________Features
o
750mA Load Currents (MAX738A/MAX744A)
o
High-Frequency, Current-Mode PWM
o
159kHz to 212.5kHz Guaranteed Oscillator
Frequency Limits (MAX744A)
o
85% to 96% Efficiencies
o
1.7mA Quiescent Current
o
6μA Shutdown Supply Current
o
Single Preselected Inductor Value,
No Component Design Required
o
Overcurrent, Soft-Start, and Undervoltage
Lockout Protection
o
Cycle-by-Cycle Current Limiting
o
8-Pin DIP/SO Packages (MAX730A)
_________________Ordering Information
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
M
5V, S tep-Down,
Current-Mode PWM DC-DC Converters
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
1
TOP VIEW
1
2
3
4
8
7
6
5
V+
LX
GND
OUT
CC
SS
REF
MAX730A
MAX738A
MAX744A
DIP
SHDN
Pin Configurations continued on last page.
_________________Pin Configurations
MAX738A
MAX744A
INPUT
6V TO 16V
V+
LX
OUT
CC
GND
SS
REF
SHDN
ON/OFF
33
μ
H
OUTPUT
5V
100
μ
F
68
μ
F
__________Typic al Operating Circ uit
19-0165; Rev 2; 1/96
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP
MAX730A
CPA
MAX730ACSA
MAX730AC/D
MAX730AEPA
MAX730AESA
MAX730AMJ A
-40°C to +85°C
-55°C to +125°C
相關PDF資料 |
PDF描述 |
|---|---|
| MAX744AEPA | 8-Bit Parallel-Out Serial Shift Registers 20-LCCC -55 to 125 |
| MAX744AMJA | 8-Bit Parallel-Out Serial Shift Registers 14-CDIP -55 to 125 |
| MAX730ACPA | 5V, Step-Down, Current-Mode PWM DC-DC Converters |
| MAX730ACSA | 5V, Step-Down, Current-Mode PWM DC-DC Converters |
| MAX730AEPA | 5V, Step-Down, Current-Mode PWM DC-DC Converters |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX744ACWE+ | 功能描述:直流/直流開關轉換器 5V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX744ACWE+T | 功能描述:直流/直流開關轉換器 5V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX744ACWE-T | 功能描述:直流/直流開關轉換器 5V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX744AEPA | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MAX744AEPA+ | 功能描述:直流/直流開關轉換器 5V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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