參數資料
| 型號： | MAX4842AEXT+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 1/11頁 |
| 文件大小： | 0K |
| 描述： | IC CTLR OVP 4.7V SC70-6 |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 過壓保護控制器 |
| 應用： | 手機，數碼相機，媒體播放器 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 6-TSSOP，SC-88，SOT-363 |
| 供應商設備封裝： | 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) threshold of 3.25V, while the MAX4842A has a
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX4842EXT | 制造商:Maxim Integrated Products 功能描述:OVERVOLTAGE PROTECTION CONTROLLER W - Cut Tape Product |
| MAX4842EXT+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4842EXT+T | 功能描述:電源開關 IC - 配電 RoHS:否 制造商:Exar 輸出端數量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MAX4842EXT+TG104 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4842EXT-T | 功能描述:電流和電力監控器、調節器 RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
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