參數(shù)資料
型號(hào)： MAX4944ELA+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 1/10頁(yè)
文件大?。?/td> 0K
描述： IC CTLR OVP W/FET 6.35V 8UDFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
類型： 過壓保護(hù)控制器
應(yīng)用： 手機(jī)，數(shù)碼相機(jī)，媒體播放器
安裝類型： 表面貼裝
封裝/外殼： 8-WFDFN
供應(yīng)商設(shè)備封裝： 8-uDFN（2x2）
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： MAX4944ELA+TDKR
General Description
The MAX4943–MAX4946/MAX4949 family of overvolt-
age-protection devices feature a low 80mΩ (typ) RON
internal FET and protect low-voltage systems against
voltage faults up to +28V. These devices also drive an
optional external pFET to protect down to -28V when
connected to a load with reverse current protection.
When the input voltage exceeds the overvoltage thresh-
old, the internal FET is turned off to prevent damage to
the protected components.
All switches feature a minimum 1.2A current-limit pro-
tection. During a short-circuit occurrence, the
MAX4944B and MAX4945B place the switch in a
latchoff state where the switch turns off and remains off.
For the autoretry devices, the switch turns off and con-
tinuously checks after a 15ms (typ) retry time.
The overvoltage thresholds (OVLO) are preset to 7.4V,
6.35V, 5.8V, 4.56V, or 8.9V. The undervoltage-lockout
(UVLO) thresholds are preset to 2.45V and 4.15V.
When the input voltage drops below the undervoltage-
lockout (UVLO) threshold, the devices enter a low-
current standby mode. (See the
Ordering Information/
Selector Guide for more details on UVLO/OVLO).
All devices are offered in a small, 8-pin DFN (2mm x
2mm) package and are specified for operation over the
-40°C to +85°C temperature range.
Applications
Features
Input Voltage Protection Up to +28V
Integrated nFET Switch
Preset Overvoltage Protection Trip Level
7.40V (MAX4943)
6.35V (MAX4944_)
5.80V (MAX4945_)
4.56V (MAX4946)
8.90V (MAX4949)
Low-Current Undervoltage-Lockout Mode
Short-Circuit Protection (Latchoff/Autoretry)
Internal 15ms (typ) Startup Delay and Retry Times
Input Voltage Power-Good Logic Output
Thermal-Shutdown Protection
Small, 8-Pin (2mm x 2mm) DFN Package
MAX4943–MAX4946/MAX4944L/MAX4945A/MAX4945L/MAX4949
Overvoltage-Protection Controllers with
Internal FET
________________________________________________________________
Maxim Integrated Products
1
19-0552; Rev 3; 6/08
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.
Ordering Information/Selector Guide
PART
PIN-PACKAGE
TOP MARK
PKG CODE
UVLO (V)
OVLO (V)
OVERCURRENT MODE
MAX4943ELA+T*
8 DFN
ABA
L822-1
4.15
7.40
Retry
MAX4944ELA+T
8 DFN
ABB
L822-1
4.15
6.35
Retry
MAX4944BELA+T*
8 DFN
ABC
L822-1
4.15
6.35
Latchoff
MAX4944LELA+T
8 DFN
ABD
L822-1
2.45
6.35
Retry
MAX4945ELA+T**
8 DFN
ABE
L822-1
4.15
5.80
Retry
MAX4945AELA+T**
8 DFN
ADW
L822-1
4.15
5.80
Retry
MAX4945BELA+T*
8 DFN
ABF
L822-1
4.15
5.80
Latchoff
MAX4945LELA+T
8 DFN
ABG
L822-1
2.45
5.80
Retry
MAX4946ELA+T
8 DFN
ABH
L822-1
2.45
4.56
Retry
MAX4949ELA+T
8 DFN
ADT
L822-1
2.45
8.90
Latchoff
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.
*
Future product—contact factory for availability.
**
The OVLO is 6.10V (max) for the MAX4945ELA+T and .6.0V (max) for the MAX4945AELA+T.
TOP VIEW
1
2
8
7
3
4
6
5
OUT
GND
ACOK
OUT
IN
GP
IN
MAX4943–
MAX4946/
MAX4944L/
MAX4945A/
MAX4945L/
MAX4949
+
DFN
2mm
× 2mm
Pin Configuration
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4944LELA+G65 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX4944LELA+T 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
MAX4944LELA+TG65 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX4945AELA+T 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
MAX4945BELA+T 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Overvoltage-Protect Controller RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
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