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參數(shù)資料
| 型號： | MAX6880ETG+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Dual-/Triple-Voltage, Power-Supply Sequencers/Supervisors |
| 中文描述： | POWER SUPPLY SUPPORT CKT, QCC24 |
| 封裝： | 4 X 4 MM, 0.80 MM HEIGHT, LEAD FREE, TQFN-24 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 401K |
| 代理商： | MAX6880ETG+T |
General Description
The MAX6880–MAX6883 dual-/triple-voltage monitors
are designed to sequence power supplies during
power-up condition. When all of the voltages exceed
their respective thresholds, these devices turn on volt-
ages to the system sequentially, enhancing n-channel
MOSFETs used as switches. The time between each
sequenced voltage is determined by an external
capacitor, thus allowing flexibility in delay timing. The
MAX6880/MAX6881 sequence three voltages and the
MAX6882/MAX6883 sequence two voltages.
These devices initially monitor all of the voltages and
when all of them are within their tolerances, the inter-
nal charge pumps enhance external n-channel
MOSFETs in a sequential manner to apply the volt-
ages to the system. Internal charge pumps drive the
gate voltages 5V above the respective input voltage
thereby ensuring the MOSFETs are fully enhanced to
reduce the on-resistance.
The MAX6880–MAX6883 feature capacitor-adjustable
slew-rate control to provide controlled turn-on charac-
teristics. After all of the voltages reach 92.5% of their
final value, a power-good output (MAX6880/MAX6882)
signal is active. The power-good output (PG/RST) can
be delayed with an external capacitor to create a
power-on reset delay. After the initial power-up phase,
the MAX6880–MAX6883 continue to monitor the volt-
ages. If any of the voltages falls below its threshold, the
MOSFETs are quickly turned off and the voltages are
tracked down together. An internal 100 pulldown
resistor ensures that the capacitance at the MOSFET’s
source is discharged quickly. The power-good output
goes low to provide a system reset.
The MAX6880–MAX6883 are available in small 4mm x
4mm 24-pin and 16-pin thin QFN packages and speci-
fied over the -40°C to +85°C extended operating tem-
perature range.
Applications
Multivoltage Systems
Networking Systems
Telecom
Storage Equipment
Servers/Workstations
Features
Capacitor-Adjustable Power-Up Sequencing
Delay
Internal Charge Pumps to Enhance External
n-Channel FETs
Capacitor-Adjustable Timeout Period Power-Good
Output (MAX6880/MAX6882)
Adjustable Undervoltage Lockout or
Logic-Enable Input
Internal 100 Pulldown for Each Output to
Discharge Capacitive Load Quickly
0.5V to 5.5V Nominal IN_/OUT_ Range
2.7V to 5.5V Operating Voltage Range
Immune to Short Voltage Transients
Small 4mm x 4mm 24-Pin or 16-Pin Thin QFN
Packages
MAX6880–MAX6883
Dual-/Triple-Voltage, Power-Supply
Sequencers/Supervisors
________________________________________________________________ Maxim Integrated Products
1
23
24
22
21
8
7
9
ABP
SET2
SET1
EN/UV
10
N.C.
GATE3
N.C.
PG/RST
OUT2
MARGIN
12
IN3
45
6
17
18
16
14
13
IN2
IN1
TIMEOUT
*EXPOSED PADDLE CONNECTED TO GND.
SLEW
DELAY
GND
EP*
+
MAX6880
SET3
OUT3
3
15
GATE1
20
11
N.C.
OUT1
19
12
N.C.
GATE2
4mm x 4mm THIN QFN
TOP VIEW
Pin Configurations
Ordering Information
19-3772; Rev 1; 10/05
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.
+Denotes lead-free package.
Selector Guide appears at end of data sheet.
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX6880ETG+
-40°C to +85°C
24 Thin QFN
T2444-4
MAX6881ETE+
-40°C to +85°C
16 Thin QFN
T1644-4
MAX6882ETE+
-40°C to +85°C
16 Thin QFN
T1644-4
MAX6883ETE+
-40°C to +85°C
16 Thin QFN
T1644-4
Pin Configurations continued at end of data sheet.
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PDF描述 |
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| MAX6881ETE+T | Dual-/Triple-Voltage, Power-Supply Sequencers/Supervisors |
| MAX6882ETE+T | Dual-/Triple-Voltage, Power-Supply Sequencers/Supervisors |
| MAX6883ETE+T | Dual-/Triple-Voltage, Power-Supply Sequencers/Supervisors |
| MAX6884ETP+T | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6881ETE | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6881ETE+ | 功能描述:監(jiān)控電路 Triple Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6881ETE+T | 功能描述:監(jiān)控電路 Triple Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6881ETE-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6882ETE | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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