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參數(shù)資料
| 型號(hào)： | MAX781EBX |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | PDA/Hand-Held Computer Power Controller |
| 中文描述： | 0.1 A SWITCHING CONTROLLER, 340 kHz SWITCHING FREQ-MAX, PDSO36 |
| 封裝： | PLASTIC, SSOP-36 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 185K |
| 代理商： | MAX781EBX |
_______________General Desc ription
The MAX781 is a system-engineered power-supply con-
troller for subnotebook computers, PDAs, or similar bat-
tery-powered equipment. It provides high-performance,
step-down (buck), pulse-width modulated (PWM) control
for generating +3.3V and constant-current battery charg-
ing. Dual PCMCIA VPP outputs are powered by a regulat-
ed flyback winding. Five high-side gate drivers and a
buffered analog multiplexer are also included. All func-
tions are controlled by an SPI/Microwire compatible
four-wire serial interface.
The MAX781 generates +3.3V with high efficiency through
synchronous rectification and PWM operation at heavy
loads. It uses Idle Mode operation at light loads. Only
small external components are required because of the
device’s high switching frequency (300kHz) and advanced
current-mode PWM architecture that allows for output
capacitance as low as 50μF per ampere of load.
The MAX781 is configured by 32 bits of serial data. These
bits select the operating mode, set the switch-mode bat-
tery charger current level, select one of eight analog multi-
plexer channels, and turn on/off the five high-side gate
drivers. A status byte read from the serial interface indi-
cates if the battery has been removed, if the DC charging
source has been connected, or if there is a fault condition
on the +3.3V output. An interrupt output signals the CPU if
a status signal changes.
____________________________Features
o
+3.3V Step-Down Controller
o
Dual PCMCIA 2.0 Compatible VPP Outputs
(0V/3.3V/5V/12V)
o
Digitally Adjustable Switching Current Source for
Battery Charging
o
5 High-Side Switch Gate-Driver Outputs
o
SPI Serial Interface
o
300kHz Switching Frequency
o
Oscillator SYNC Input
o
2.5V ±1.5% Reference Output
o
36-Pin SSOP Package
________________________Applic ations
Subnotebook Computers
PDAs
Communicating Computers
Handy-Terminals
______________Ordering Information
M
PDA/Hand-Held Computer Power Controller
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
MAX781
DIGITALLY
ADJUSTABLE
SWITCHING
CURRENT
SOURCE
LOAD
SWITCHES
SUBSYSTEMS
5
4
HIGH-SIDE GATE DRIVERS
+3.3V AT 1A OR MORE
INTERRUPT
VPPA
VPPB
ANALOG MULTIPLEXER OUTPUT
DCIN
(up to 18V)
5 to 8
NiCd/NiMH
CELLS
or
2 LION
CELLS
SELF REFRESH
DRAM
CPU
PCMCIA
SLOT B
PCMCIA
SLOT A
ADC
________________________________________________Typic al Applic ation Diagram
19-0205; Rev 0; 7/94
PART
MAX781CBX
MAX781EBX
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
36 SSOP
36 SSOP
SPI is a trademark of Motorola Inc. Microwire is a trademark of National Semiconductor Corp.
Idle Mode is a trademark of Maxim Integrated Porducts.
Pin Configuration on last page.
AVAILABLE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX783 | Triple-Output Power-Supply Controller for Notebook Computers(3.3V/5V,具有雙組PCMCIA標(biāo)準(zhǔn)VPP輸出的筆記本電腦電源控制器) |
| MAX786 | Dual-Output Power-Supply Controller for Notebook Computers(具有25μA關(guān)斷的,3.3V/5V筆記本型電腦電源) |
| MAX787 | 5V/3.3V/3V 5A Step-Down, PWM, Switch-Mode DC-DC Regulators(5A,5V步降,PWM,開關(guān)型DC-DC變換器) |
| MAX788 | 5V/3.3V/3V 5A Step-Down, PWM, Switch-Mode DC-DC Regulators(5A,5V步降,PWM,開關(guān)型DC-DC變換器) |
| MAX789 | 5V/3.3V/3V 5A Step-Down, PWM, Switch-Mode DC-DC Regulators(5A,5V步降,PWM,開關(guān)型DC-DC變換器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7828BQ | 制造商:Maxim Integrated Products 功能描述:NON BOOK, REQUIRES NCNR, Q# - Rail/Tube |
| MAX7828UQ/883B | 制造商:Maxim Integrated Products 功能描述:NON BOOK, REQUIRES NCNR, Q# - Rail/Tube |
| MAX782C/D | 功能描述:DC/DC 開關(guān)控制器 Triple-Output Power-Supply Controller for Notebook Computers RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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 |
| MAX782C/D+ | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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 |
| MAX782CBX | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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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