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| 型号： | MAX8548EUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 120kHz |
| 占空比： | 95% |
| 电源电压： | 2.7 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
19-2795; Rev 2; 6/07
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
General Description
The MAX8545/MAX8546/MAX8548 are voltage-mode
pulse-width-modulated (PWM), step-down DC-DC con-
trollers ideal for a variety of cost-sensitive applications.
They drive low-cost n-channel MOSFETs for both the
high-side switch and synchronous rectifier, and require
no external current-sense resistor. These devices can
supply output voltages as low as 0.8V.
The MAX8545/MAX8546/MAX8548 have a wide 2.7V to
28V input range, and do not need any additional bias
voltage. The output voltage can be precisely regulated
from 0.8V to 0.83 x V IN . These devices can provide effi-
ciency up to 95%. Lossless short-circuit and current-limit
protection is provided by monitoring the R DS(ON) of the
low-side MOSFET. The MAX8545 and MAX8548 have a
current-limit threshold of 320mV, while the MAX8546 has
a current-limit threshold of 165mV. All devices feature
foldback-current capability to minimize power dissipation
under short-circuit condition. Pulling the COMP/EN pin
low with an open-collector or low-capacitance, open-
drain device can shut down all devices.
The MAX8545/MAX8546 operate at 300kHz and the
MAX8548 operates at 100kHz. The MAX8545/MAX8546/
MAX8548 are compatible with low-cost aluminum elec-
Features
? 2.7V to 28V Input Range
? Foldback Short-Circuit Protection
? No Additional Bias Supply Needed
? 0.8V to 0.83 x V IN Output
? Up to 95% Efficiency
? Low-Cost External Components
? No Current-Sense Resistor
? All n-Channel MOSFET Design
? Adaptive Gate Drivers Eliminate Shoot-Through
? Lossless Overcurrent and Short-Circuit
Protection
? 300kHz Switching Frequency
(MAX8545/MAX8546)
? 100kHz Switching Frequency (MAX8548)
? Pin-Compatible with the MAX1967
? Thermal Shutdown
Selector Guide
trolytic capacitors. Input undervoltage lockout prevents
SWITCHING
CURRENT-LIMIT
proper operation under power-sag operations to prevent
external MOSFETs from overheating. Internal soft-start is
included to reduce inrush current. These devices are
offered in space-saving 10-pin μMAX ? packages.
PART
MAX8545
FREQUENCY
(kHz)
300
THRESHOLD
(mV)
-320
Set-Top Boxes
Applications
Notebook Docking
MAX8546
MAX8548
300
100
-165
-320
Graphic Card and Video
Supplies
Desktops and Desknotes
Station Supplies
Cable Modems and
Routers
INPUT
2.7V TO 28V
Typical Operating Circuit
PCI Express Power
Supplies
Telecom Power Supplies
Networking Power
Supplies
V CC VL
Ordering Information
V IN
BST
DH
OUTPUT
0.8V TO
0.9 x V IN
PART
MAX8545 EUB
MAX8545EUB+
MAX8546 EUB
TEMP RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-
PACKAGE
10 μMAX
10 μMAX
10 μMAX
PKG
CODE
U10-2
U10-2
U10-2
ON
OFF
MAX8545
MAX8546
MAX8548
COMP/
EN
LX
DL
GND
FB
UP TO 6A
MAX8546EUB+
MAX8548 EUB
-40 ° C to +85 ° C
-40 ° C to +85 ° C
10 μMAX
10 μMAX
U10-2
U10-2
MAX8548EUB+
-40 ° C to +85 ° C
10 μMAX
U10-2
OPTIONAL
+ Denotes a lead-free package.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
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.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8548EUB+ | 功能描述:电压模式 PWM 控制器 Wide Input Range Step-Down Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8548EUB+T | 功能描述:电压模式 PWM 控制器 Wide Input Range Step-Down Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX8548EUB-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX8550AETI | 功能描述:PMIC 解决方案 RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8550AETI+ | 功能描述:电压模式 PWM 控制器 Integrated DDR Power Supply Solution RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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