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參數(shù)資料
| 型號(hào)： | MAX746CSE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Parallel-Load 8-Bit Shift Registers 20-LCCC -55 to 125 |
| 中文描述： | SWITCHING CONTROLLER, PDSO16 |
| 封裝： | 0.150 INCH , PLASTIC, SO-16 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大小： | 157K |
| 代理商： | MAX746CSE |
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_______________General Desc ription
The MAX746 is a high-efficiency, high-current, step-down
DC-DC power-supply controller that drives external N-chan-
nel FETs. It provides 93% to 96% efficiency from a 6V supply
voltage with load currents ranging from 50mA up to 3A. It
uses a pulse-width-modulating (PWM) current-mode control
scheme to provide precise output regulation and low output
noise. The MAX746's 4V to 15V input voltage range, fixed
5V/adjustable (Dual-Mode
TM
) output, and adjustable current
limit make this device ideal for a wide range of applications.
High efficiency is maintained with light loads due to a propri-
etary automatic pulse-skipping control (Idle-Mode
TM
) scheme
that minimizes switching losses by reducing the switching fre-
quency at light loads. The low 950μA quiescent current and
ultra-low 1.4μA shutdown current further extend battery life.
External components are protected by the MAX746's cycle-
by-cycle current limit. The MAX746 also features a 2V ±1.5%
reference, a comparator for low-battery detection or level
translating, and soft-start and shutdown capability.
The MAX747—discussed ina separatedata sheet—
functions similarly to the MAX746, but drives P-channel logic
level FETs.
________________________Applic ations
5V-to-3.3V Green PC Applications
Notebook/Laptop Computers
Personal Digital Assistants
Battery-Operated Equipment
Cellular Phones
____________________________Features
o
93% to 96% Efficiency for 50mA to 3A
Output Currents
o
4V to 15V Input Voltage Range
o
Low 950μA Supply Current
o
1.4μA Shutdown Current
o
Drives External N-Channel FETs
o
Fixed-Frequency Current-Mode PWM (Heavy Loads)
o
Idle-Mode PFM (Light Loads)
o
Cycle-by-Cycle Current Limiting
o
2V ±1.5% Accurate Reference Output
o
Adjustable Soft-Start
o
Undervoltage Lockout
o
Precision Comparator for Power-Fail or
Low-Battery Warning
______________Ordering Information
* Contact factory for dice specifications.
M
High-Effic ienc y, PWM, S tep-Down,
N-Channel DC-DC Controller
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
GND
V+
CP
HIGH
REF
SS
LBI
LBO
TOP VIEW
MAX746
EXT
AGND
CS
OUT
AV+
CC
FB
SHDN
DIP/SO
__________________Pin Configuration
CP
HIGH
SHDN
LBI
REF
SS
EXT
OUT
V+
AV+
CS
OUTPUT
5V
LOW-BATTERY
DETECTOR OUTPUT
LBO
GND
AGND
FB
CC
ON/OFF
LOW-BATTERY
DETECTOR INPUT
INPUT 6V TO 15V
40m
39
μ
H
440
μ
F
MAX746
__________Typic al Operating Circ uit
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
16 Plastic DIP
16 Narrow SO
Dice*
16 Plastic DIP
MAX746CPE
MAX746CSE
MAX746C/D
MAX746EPE
MAX746MJ E
-55°C to +125°C
16 CERDIP
MAX746ESE
-40°C to +85°C
16 Narrow SO
19-0192; Rev 1; 11/93
Dual-Mode and Idle-Mode are trademarks of Maxim Integrated Products.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX746EPE | Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125 |
| MAX746ESE | Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125 |
| MAX746MJE | Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125 |
| MAX747 | Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125 |
| MAX747CPD | Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX746CSE-T | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX746CSE-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX746EPE | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX746ESE | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX746ESE-T | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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