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| 型号： | MAX4971EWC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/9页 |
| 文件大小： | 0K |
| 描述： | IC OVERVOLTAGE PROT CTRLR 12WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 过压保护控制器 |
| 输入电压： | 2.2 V ~ 28 V |
| 电流 - 电源： | 60µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFBGA，WLCSP |
| 供应商设备封装： | 12-WLP |
| 包装： | 带卷 (TR) |
19-4139; Rev 1; 8/08
Overvoltage-Protection Controllers
with a Low R ON Internal FET
General Description
The MAX4970/MAX4971/MAX4972 family of overvolt-
age protection devices features a low 40m Ω (typ) R ON
internal FET and protect low-voltage systems against
voltage faults up to +28V. These devices also drive an
optional external pFET to protect against reverse-polari-
ty input voltages. When the input voltage exceeds the
overvoltage threshold, the internal FET is turned off to
prevent damage to the protected components.
All switches feature a 2.3A (min) current-limit protec-
tion. During a short-circuit occurrence, the device oper-
ates in an autoretry mode where the internal MOSFET is
turned on to check if the fault has been removed. The
autoretry interval time is 15ms, and if the fault is
removed, the MOSFET remains on.
The MAX4970/MAX4971/MAX4972 feature an enable
input ( EN ) that controls the operation of the internal
nFET as well as the optional external pFET. The use of
EN allows the external pFET to block reverse voltages
independent of any signal present at the output.
The overvoltage thresholds (OVLO) are preset to
Features
? Input Voltage Protection up to +28V
? Integrated nFET Switch
? Reverse Voltage Protection with External pFET
? Enable Input
? Preset Overvoltage Protection Trip Level
5.8V (MAX4970)
6.35V (MAX4971)
4.65V (MAX4972)
? Low-Current Undervoltage-Lockout Mode
? Short-Circuit Protection (Autoretry)
? Internal 15ms Startup Delay and Retry Times
? Input-Voltage Power-Good Logic Output
? Thermal-Shutdown Protection
? 2mm x 1.5mm, 12-Bump WLP Package
Pin Configuration
TOP VIEW (BUMPS ON BOTTOM)
4.65V (MAX4972), 5.8V (MAX4970), or 6.35V (MAX4971).
The undervoltage thresholds (UVLO) are preset to 2.45V.
1
2
3
4
When the input voltage drops below the UVLO, the
devices enter a low-current standby mode.
All devices are offered in a small 12-bump, WLP pack-
A
MAX4970/MAX4971/MAX4972
age and operate over the -40°C to +85°C extended
temperature range.
ACOK
OUT
OUT
OUT
Applications
B
Cell Phones
GND
OUT
IN
GP
Digital Still Cameras
C
PDAs and Palmtop Devices
EN
IN
IN
IN
MP3 Players
WLP
Ordering Information/Selector Guide
PART
MAX4970 EWC+T
MAX4971 EWC+T
MAX4972 EWC+T
PIN-PACKAGE
12 WLP
12 WLP
12 WLP
TOP MARK
AAA
AAB
AAC
PACKAGE CODE
W121A2+1
W121A2+1
W121A2+1
UVLO (V)
2.45
2.45
2.45
OVLO (V)
5.8
6.35
4.65
ACOK ACTION
UVLO only
UVLO only
UVLO and OVLO
Note: All devices are specified over the -40°C to +85°C operating temperature range.
+Denotes a lead-free/RoHS-compliant package.
T = Tape-and-reel package.
Typical Operating Circuit 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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| MAX4972EBC+T | 功能描述:电流和电力监控器、调节器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX4972EWC+T | 功能描述:电流和电力监控器、调节器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX4978ETA+ | 制造商:Maxim Integrated Products 功能描述:OVERVOLTAGE PROTECTOR WITH ACTIVE C - Rail/Tube |
| MAX4978ETA+T | 功能描述:电流和电力监控器、调节器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX497C/D | 功能描述:运算放大器 - 运放 RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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