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參數(shù)資料
| 型號(hào)： | MAX6872ETJ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors with Charge-Pump Outputs |
| 中文描述： | 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC32 |
| 封裝： | 7 X 7 MM, 0.80 MM HEIGHT, MO-220, TQFN-32 |
| 文件頁數(shù)： | 25/48頁 |
| 文件大?。?/td> | 374K |
| 代理商： | MAX6872ETJ |
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MAX6872/MAX6873
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
______________________________________________________________________________________
31
Charge-Pump Output Configuration
Configure the programmable outputs of the MAX6872/
MAX6873 as charge-pump outputs to drive n-channel
FETs for power-supply sequencing applications. Only
PO1–PO4 (MAX6872) or PO1 and PO2 (MAX6873) can be
configured as charge-pump output stages. The
charge-pump output high voltage is typically VABP
+5.5V when unloaded.
Push-Pull Output Configuration
The MAX6872/MAX6873s’ programmable outputs sink
4mA and source 10mA when configured as push-pull
outputs. Only PO5–PO8 (MAX6872) or PO3–PO5
(MAX6873) can be configured as push-pull output
stages. The push-pull output stages refer to any of
IN3–IN6 (MAX6872)/IN3–IN4 (MAX6873) as configured
in Tables 21 and 22. Use the push-pull output configu-
ration to drive loads with fast rise/fall times, or those
with low impedance.
Weak Pullup Output Configuration
The MAX6872/MAX6873s’ programmable outputs sink
4mA when configured as weak pullups. The weak pullup
of 10k
refers to any of IN3–IN6 (MAX6872)/IN3–IN4
(MAX6873) or ABP as configured in Tables 21 and 22.
All programmable outputs of the MAX6872/MAX6873
may be configured as weak pullups.
Open-Drain Output Configuration
Connect an external pullup resistor from the program-
mable output to an external voltage when configured as
an open-drain output. PO1–PO4 (PO1 and PO2 for the
MAX6873) may be pulled up to +13.2V. PO5–PO8
(PO3–PO5 for the MAX6873) may be pulled up to a
voltage less than or equal to ABP. Choose the pullup
resistor depending on the number of devices connect-
ed to the open-drain output and the allowable current
consumption. The open-drain output configuration
allows wire-ORed connections, and provides flexibility
in setting the pullup current.
Configuring the MAX6872/MAX6873
The MAX6872/MAX6873 factory-default configuration
sets all EEPROM registers to 00h except register 3Ah,
which is set to FFh. This configuration sets all of the pro-
grammable outputs as active high, open drain (putting
all outputs into high-impedance states until the device is
reconfigured by the user). Each device requires configu-
ration before full power is applied to the system. To con-
figure the MAX6872/MAX6873, first apply an input
voltage to IN1 or one of IN3–IN6 (MAX6872)/IN3–IN4
(MAX6873) (see the Powering the MAX6872/MAX6873
section). VIN1 > +4V or one of VIN3–VIN6 > +2.7V, to
ensure device operation. Next, transmit data through the
serial interface. Use the block write protocol to quickly
configure the device. Write to the configuration registers
first to ensure the device is configured properly. After
completing the setup procedure, use the read word pro-
tocol to verify the data from the configuration registers.
Lastly, use the write word protocol to write this data to
the EEPROM registers. After completing EEPROM regis-
ter configuration, apply full power to the system to begin
normal operation. The non-volatile EEPROM stores the
latest configuration upon removal of power. Write zeros
to all EEPROM registers to clear the memory.
Software Reboot
A software reboot allows the user to restore the
EEPROM configuration to the volatile registers without
cycling the power supplies. Use the send byte com-
mand with data byte 88h to initiate a software reboot.
The 3.5ms (max) power-up delay also applies after a
software reboot.
Table 23. PO_ Timeout Periods
AFFECTED OUTPUTS
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT RANGE
MAX6872
MAX6873
DESCRIPTION
11h
8011h
[3:1]
PO1
—
15h
8015h
[3:1]
PO2
—
1Ch
801Ch
[4:2]
PO3
PO1
23h
8023h
[4:2]
PO4
PO2
2Ah
802Ah
[3:1]
PO5
PO3
31h
8031h
[3:1]
PO6
PO4
35h
8035h
[3:1]
PO7
PO5
39h
8039h
[3:1]
PO8
—
000 = 25s
001 = 1.5625ms
010 = 6.25ms
011 = 25ms
100 = 50ms
101 = 200ms
110 = 400ms
111 = 1600ms
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6872ETJ+ | 功能描述:監(jiān)控電路 EEPROM-Prog Hex Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| MAX6872ETJ+T | 功能描述:監(jiān)控電路 EEPROM-Prog Hex Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| MAX6872ETJ-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| MAX6873ETJ | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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 |
| MAX6873ETJ+ | 功能描述:監(jiān)控電路 EEPROM-Prog Quad Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)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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