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19-4357; Rev 0; 10/08
Adjustable Overvoltage Protector
with High Accuracy
General Description
The MAX14527/MAX14528 overvoltage protection
devices feature a low 100m Ω (typ) R ON internal FET
and protect low-voltage systems against voltage faults
up to +28V. When the input voltage exceeds the over-
voltage threshold, the internal FET is turned off to pre-
vent damage to the protected components.
The overvoltage protection threshold can be adjusted
with optional external resistors to any voltage between
4V and 8V. With the OVLO input set below the external
OVLO select voltage, the MAX14527/MAX14528 auto-
matically choose the internal ±2.5% accurate trip
thresholds. The internal overvoltage thresholds (OVLO)
are preset to 5.75V typical (MAX14527) or 6.76V typical
(MAX14528). The MAX14527/MAX14528 are also
protected against overcurrent events with an internal
thermal shutdown.
The MAX14527/MAX14528 are offered in a small, 8-pin
TDFN-EP package and operate over the -40°C to
+85°C extended temperature range.
Applications
Features
? Input Voltage Protection Up to +28V
? Preset Internal ±2.5% Accurate OVLO Thresholds
5.75V (MAX14527)
6.76V (MAX14528)
? Adjustable Overvoltage Protection Trip Level
? Integrated 100m Ω (typ) n-Channel MOSFET
Switch
? Soft-Start to Minimize In-Rush Current
? Automatic Overvoltage Protection Trip-Level
Selection
? Internal 15ms Startup Delay
? Thermal Shutdown Protection
? 8-Pin TDFN (2mm x 2mm) Package
? -40°C to +85°C Operating Temperature Range
Ordering Information
Cell Phones
Media Players
PDAs and Palmtop Devices
PART
MAX14527 ETA+T
MAX14528 ETA+T
PIN-PACKAGE
8 TDFN-EP*
8 TDFN-EP*
TOP
MARK
ACR
ACS
OVLO
(V)
5.75
6.76
Note: Devices are specified over the -40°C to +85°C tempera-
ture range.
+Denotes a lead-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
T = Tape and reel.
*EP = Exposed pad.
Typical Application Circuit
USB
CONNECTOR
VBUS
1 μ F
IN
IN
OUT
OUT
CHARGER
INPUT
PMIC
R1
OVLO
MAX14527
MAX14528
*
R2
GND
*R1 AND R2 ARE REQUIRED ONLY FOR ADJUSTABLE OVLO; OTHERWISE, CONNECT OVLO TO GND.
________________________________________________________________ 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.
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相关代理商/技术参数
MAX14528BETA+ 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX14528BETA+T 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX14528ETA+T 功能描述:监控电路 Over Volt Protector w/High Accuracy RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel
MAX14528EVKIT+ 制造商:Maxim Integrated Products 功能描述:EVKITS - Boxed Product (Development Kits)
MAX14529EEVKIT 功能描述:电源管理IC开发工具 MAX14529E Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
MAX14529EEVKIT+ 功能描述:电源管理IC开发工具 MAX14529E Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
MAX14529EEWC+ 制造商:Maxim Integrated Products 功能描述:- Bulk
MAX14529EEWC+T 功能描述:监控电路 Over Volt Protector w/USB Charger Detect RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel