參數(shù)資料
型號(hào)： MAX4838AEXT+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 1/11頁(yè)
文件大小： 0K
描述： IC CTLR OVP 7.4V SC70-6
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
類型： 過(guò)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： 6-TSSOP，SC-88，SOT-363
供應(yīng)商設(shè)備封裝： SC-70-6
包裝： 帶卷 (TR)
General Description
The MAX4838A/MAX4840A/MAX4842A are overvoltage-
protection ICs that protect low-voltage systems against
voltages of up to +28V. If the input voltage exceeds the
overvoltage trip level, the MAX4838A/MAX4840A/
MAX4842A turn off the low-cost external n-channel
FET(s) to prevent damage to the protected components.
An internal charge pump eliminates the need for external
capacitors and drives the FET gate for a simple,
robust solution.
The MAX4838A has a 7.4V overvoltage threshold, and
the MAX4840A has a 5.8V overvoltage threshold. The
MAX4842A has a 4.7V overvoltage threshold. The
MAX4838A/MAX4840A have an undervoltage-lockout
UVLO of 2.5V. In addition to the single FET configura-
tion, the devices can be configured with back-to-back
external FETs to prevent currents from being back-dri-
ven into the adapter.
On power-up, the device waits for 50ms before driving
GATE high. FLAG is held low for an additional 50ms
after GATE goes high before deasserting. The
MAX4838A/MAX4840A/MAX4842A have an open-drain
FLAG output. The FLAG output asserts immediately to
an overvoltage fault.
Additional features include a ±15kV (HBM) ESD-pro-
tected input (when bypassed with a 1F capacitor) and
a shutdown pin (EN) to turn off the device.
All devices are offered in a small 6-pin SC70 and 6-pin
1.5mm x 1.0mm DFN packages and are specified
over the -40°C to +85°C extended temperature range.
Applications
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 Players
Features
Overvoltage Protection Up to +28V
Preset 7.4V, 5.8V, or 4.7V Overvoltage Trip Level
Drives Low-Cost nMOS FET
Internal 50ms Startup Delay
Internal Charge Pump
Undervoltage Lockout
±15kV ESD-Protected Input
Voltage Fault FLAG Indicator
6-Pin SC70 and DFN Packages
Lead Free
MAX4838A/MAX4840A/MAX4842A
Overvoltage-Protection Controllers with
Status
FLAG
________________________________________________________________ Maxim Integrated Products
1
MAX4838A
MAX4840A
MAX4842A
INPUT
+1.2V TO +28V
IN
EN
GATE
FLAG
GND
1
6
4
2
3
OUTPUT
VIO
1
F
NOTE: EN AND PULLUP
RESISTOR
NMOS
Typical Operating Circuit
Ordering Information
19-3979; Rev 0; 2/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Pin Configuration appears at end of data sheet.
PART
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX4838AEXT+T
6 SC70
ACY
X6S-1
MAX4838AELT+
6 DFN
KU
L611-1
MAX4840AEXT+T
6 SC70
ACZ
X6S-1
MAX4840AELT+
6 DFN
KV
L611-1
MAX4842AEXT+T
6 SC70
ADA
X6S-1
MAX4842AELT+*
6 DFN
KW
L611-1
Selector Guide
PART
UVLO
THRESHOLD
(V)
OV
TRIP
LEVEL
(V)
EN
INPUT
FLAG
OUTPUT
MAX4838A
3.25
7.4
Yes
Open-Drain
MAX4840A
3.25
5.8
Yes
Open-Drain
MAX4842A
2.50
4.7
Yes
Open-Drain
Note: All devices specified for the -40°C to +85°C extended
temperature range.
*Future product—contact factory for availability.
+Denotes lead-free package.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4838EXT 制造商:Maxim Integrated Products 功能描述:OVERVOLTAGE PROTECTION CONTROLLERS - Rail/Tube
MAX4838EXT+T 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Overvoltage Protect Ctlr w/Status FLAG 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
MAX4838EXT+TG104 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Overvoltage Protect Ctlr w/Status FLAG 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
MAX4838EXT-G104 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX4838EXT-T 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 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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