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參數(shù)資料
| 型號： | MAX6399ATA-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High-Voltage, Overvoltage/Undervoltage, Protection Switch Controller |
| 中文描述： | SWITCHING CONTROLLER, DSO8 |
| 封裝： | 3 X 3 MM, 0.80 MM HIEGHT, MO229/WEED-3, TDFN-8 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 649K |
| 代理商： | MAX6399ATA-T |
General Description
The MAX6399 is a small overvoltage and undervoltage
protection circuit. The device can monitor a DC-DC out-
put voltage and quickly disconnect the power source
from the DC-DC input load when an overvoltage condi-
tion occurs. A power-OK output signals when the
DC-DC input voltage falls below an adjustable thresh-
old. This controller architecture provides the ability to
size the external n-channel MOSFET to meet specific
load current requirements.
When the DC-DC monitored output voltage is below the
user-adjustable overvoltage threshold, the GATE output
of the MAX6399 goes high to enhance the n-channel
MOSFET. The MAX6399 offers internal charge-pump
circuitry that allows the GATE voltage to be 10V above
the input voltage (V
GS
= 10V) to fully enhance the
external n-channel MOSFET, thus minimizing the drain-
to-source resistance.
When the monitored output voltage rises above the
user-adjusted overvoltage threshold, the GATE output
rapidly pulls low to shut off the MOSFET. The MOSFET
remains latched off until either the MAX6399 input
power or
SHDN
input is cycled. The MAX6399 includes
a logic-low shutdown input that disables the GATE. An
internal overtemperature detector also disables the
gate when the MAX6399 temperature reaches the ther-
mal-shutdown threshold.
The device operates over a wide supply voltage range
(5.75V to 72V) and is offered in a small TDFN package,
fully specified from -40°C to +125°C.
Applications
Telecom
RAID
Networking
Server
Features
Wide Supply Voltage Range (5.75V to 72V)
Internal Charge Pump Ensures n-Channel
MOSFET is Fully Enhanced During Normal
Operation (V
GS
= 10V)
Fast GATE Shutoff During Overvoltage with 20mA
Sink Capability
Latches Off External n-Channel MOSFET During
High-Voltage Transients
Adjustable DC-DC Input Undervoltage Threshold
Power-OK Output
Adjustable DC-DC Output Overvoltage
Thresholds
Overtemperature Shutdown Protection
Fully Specified from -40°C to +125°C
M
High-Voltage, Overvoltage/Undervoltage,
Protection Switch Controller
________________________________________________________________
Maxim Integrated Products
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.
1
Ordering Information
19-3655; Rev 1; 3/06
PART
PIN-PACKAGE
TOP
MARK
ANE
PKG
CODE
T833-2
MAX6399ATA-T
8 TDFN-8
TDFN
*EP
*EXPOSED PAD. CONNECT TO GND.
TOP VIEW
O
G
I
S
P
G
1
2
3
4
5
6
7
8
O
MAX6399
S
Pin Configuration
MAX6399
12V
SET
GATE
IN
POK
OUT_SET
OUT
GND
DC-DC
CONVERTER
IN
OUT
GND
EN
3.3V
LOAD
SHDN
Typical Operating Circuit
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