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參數(shù)資料
| 型號： | MAX16049ATN+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC56 |
| 封裝： | 8 X 8 MM, ROHS COMPLIANT, TQFN-56 |
| 文件頁數(shù)： | 50/61頁 |
| 文件大?。?/td> | 790K |
| 代理商： | MAX16049ATN+ |
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tor between the voltage source, VIN, and VCC
(Figure 15). The capacitor value depends on VIN and
the time delay required, tFAULT_SAVE. Use the following
formula to calculate the capacitor size:
where the capacitance is in Farads and tFAULT_SAVE is
in seconds. ICC(MAX) is 5mA, VDIODE is the voltage
drop across the diode, and VUVLO is 2.85V. For exam-
ple, with a VIN of 14V, a diode drop of 0.7V, and a
tFAULT_SAVE of 0.306s, the minimum required capaci-
tance is 190F.
Driving High-Side MOSFET Switches
The MAX16047A/MAX16049A use external n-channel
MOSFET switches for voltage tracking applications. To
configure the part for closed-loop voltage tracking using
series-pass MOSFETs, configure up to four of the pro-
grammable outputs (EN_OUT1–EN_OUT4) of the
MAX16047A/MAX16049A as closed-loop tracking outputs
and configure up to four of the GPIOs as sense-return
inputs (INS1–INS4). Connect the EN_OUT_ output to the
gate of an n-channel MOSFET, connect the source of the
MOSFET to the INS_ feedback input, and monitor the
drain side of the MOSFET with the corresponding MON_
input (see Figure 16). Both the input and the output must
be assigned to the same slot (see the
Closed–Loop
Tracking section). Configure the power-up and power-
down slew rates in the configuration registers. To provide
additional control over power-down, enable the internal
100
pulldown resistors on the INS_ connections.
Up to six of the programmable outputs (EN_OUT1–
EN_OUT6) of the MAX16047A/MAX16049A may be con-
figured as charge-pump outputs. In this case, they can
drive the gates of series-pass n-channel MOSFETS with-
out closed-loop tracking functionality. When configured
in this way, these outputs act as simple power switches
to turn on the voltage supply rails. Approximate the slew
rate, SR, using the following formula:
where ICP is the 6A (typ) charge-pump source cur-
rent, CGATE is the gate capacitance of the MOSFET,
and CEXT is the capacitance connected from the gate
to ground. Power-down is not well controlled due to the
absence of the 100
pulldowns.
If more than six series-pass MOSFETs are required for
an application, additional series-pass p-channel
MOSFETs may be connected to outputs configured as
active-low open drain (Figure 17). Connect a pullup
resistor from the gate to the source of the MOSFET and
ensure the absolute maximum ratings of the
MAX16047A/MAX16049A are not exceeded.
SR
I
CC
CP
GATE
EXT
=
+
()
C
tI
VV
V
FAULT_SAVE
CC(MAX)
IN
DIODE
CC(MIN)
=
×
MAX16047A/MAX16049A
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
54
______________________________________________________________________________________
MAX16047A/MAX16049A
MAX16047A
MAX16049A
VCC
C
VIN
GND
Figure 15. Power Circuit for Shutdown During Fault Conditions
MON_
EN_OUT_
INS_
VIN
VOUT
REFERENCE
RAMP
LOGIC
ADC MUX
VTH_PG
100
GATE
DRIVE
Figure 16. Closed-Loop Tracking
MAX16047A
MAX16049A
VOUT
D
S
G
R
MON_
EN_OUT_
VIN
Figure 17. Connection for a p-Channel Series-Pass MOSFET
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| MAX16049ATN+ | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager 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 |
| MAX16049ATN+T | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager 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 |
| MAX16049ETN+ | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager 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 |
| MAX16049ETN+T | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager 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 |
| MAX1604EAI | 功能描述:電源開關(guān) IC - 配電 RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
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