參數(shù)資料
型號： MAX16040
廠商： Maxim Integrated Products, Inc.
英文描述： Low-Power Battery Backup Circuits in Small レDFN Packages
中文描述： 低功耗電池備份電路，采用微型µDFN封裝
文件頁數(shù)： 12/21頁
文件大小： 228K
代理商： MAX16040
M
Low-Power Battery Backup
Circuits in Small μDFN Packages
12
______________________________________________________________________________________
RESET
A μP’s reset input puts the μP in a known state. The
MAX16033–MAX16040 μP supervisory circuits assert a
reset to prevent code-execution errors during power-
up, power-down, and brownout conditions.
RESET
asserts when V
CC
is below the reset threshold voltage
and for at least 140ms (t
RP
) after V
CC
rises above the
reset threshold.
RESET
also asserts when
MR
is low
(MAX16033/MAX16037) or when RESETIN is below
1.235V (MAX16036/MAX16040). The MAX16034/
MAX16038 watchdog function causes
RESET
to assert in
pulses following a watchdog timeout (Figure 2). The
MAX160_ _L devices provide push-pull
RESET
outputs.
The MAX160_ _P devices provide open-drain
RESET
outputs.
Applications Information
Operation Without a Backup Power Source
The MAX16033–MAX16040 provide a battery backup
function. If a backup power source is not used, connect
BATT to GND and OUT to V
CC
.
Using a Super Cap as a
Backup Power Source
Super caps are capacitors with extremely high capaci-
tance, such as 0.47F. Figure 5 shows two methods to
use a super cap as a backup power source. Connect
the super cap through a diode to the 3V input (Figure
5a) or connect the super cap through a diode to 5V
(Figure 5b) if a 5V supply is available. The 5V supply
charges the super cap to a voltage close to 5V, allow-
ing a longer backup period. Since V
BATT
can be higher
than V
CC
while V
CC
is above the reset threshold volt-
age, there are no special precautions required when
using these μP supervisors with a super cap.
(a)
3V OR 3.3V
0.47F
1N4148
V
CC
BATT
MAX16033–
MAX16040
(b)
3V OR 3.3V
5V
0.47F
1N4148
V
CC
BATT
MAX16033–
MAX16040
Figure 5. Using a Super Cap as a Backup Source
相關(guān)PDF資料
PDF描述
MAX16047 12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers
MAX16047ETN 12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers
MAX16049 Hold function, Loop detection; Vin (V) max.: 24; Icc (mA) max.: 6.45; Fmax (kHz) max.: 400; Topr [Tjopr] (°C): -40 to +125; Remarks: Power factor collection; Package: DIP; Pin count: 16
MAX16049ETN Hold function, Loop detection; Vin (V) max.: 24; Icc (mA) max.: 6.45; Fmax (kHz) max.: 400; Topr [Tjopr] (°C): -40 to +125; Remarks: Power factor collection; Package: SOP; Pin count: 16
MAX16048 12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX16040LLA23+ 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 2.32V 8PIN UDFN - Rail/Tube
MAX16040LLA23+T 功能描述:監(jiān)控電路 Battery Backup 2.5V-Ep 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
MAX16040LLA26+ 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 2.63V 8PIN UDFN - Rail/Tube
MAX16040LLA26+T 功能描述:監(jiān)控電路 Battery Backup 2.63V 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
MAX16040LLA29+ 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 2.93V 8PIN UDFN - Rail/Tube
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