參數(shù)資料
型號(hào): MAX6898AALT-T
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 電源管理
英文描述: Ultra-Small, Adjustable Sequencing/Supervisory Circuits
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6
封裝: 1.50 X 1 MM, 0.80 MM HEIGHT, MICRO, DFN-6
文件頁(yè)數(shù): 13/13頁(yè)
文件大?。?/td> 266K
代理商: MAX6898AALT-T
Enable Input (ENABLE or ENABLE)
The MAX6895/MAX6897 offer an active-high enable
input (ENABLE), while the MAX6896/MAX6898 offer an
active-low enable input (ENABLE). With VIN above VTH,
drive ENABLE high (ENABLE low) to force OUT high
(OUT low) after the adjustable delay time (A versions).
For P version devices, when VIN > 0.5V and enable is
asserted, the output asserts after typically 150ns.
The enable input has logic-high and logic-low voltage
thresholds of 1.4V and 0.4V, respectively. For both ver-
sions, when VIN > 0.5V, drive ENABLE low (ENABLE
high) to force OUT low (OUT high) within 150ns typ.
Output (OUT or OUT)
The MAX6895 offers an active-high, push-pull output
(OUT), and the MAX6896 offers an active-low push-pull
output (OUT). The MAX6897 offers an active-high
open-drain output (OUT), and the MAX6898 offers an
active-low open-drain output (OUT).
Push-pull output devices are referenced to VCC. Open-
drain outputs can be pulled up to 28V.
Applications Information
Input Threshold
The MAX6895–MAX6898 monitor the voltage on IN with
an external resistive divider (see R1 and R2 in the
Typical Operating Circuit). R1 and R2 can have very
high values to minimize current consumption due to low
IN leakage currents (±15nA max). Set R2 to some con-
veniently high value (1M
, for example) and calculate
R1 based on the desired monitored voltage using the
following formula:
where VMONITOR is the desired monitored voltage and
VIN is the detector input threshold (0.5V).
RR
V
MONITOR
IN
12
1
MAX6895–MAX6898
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
_______________________________________________________________________________________
9
Figure 5. MAX6896P/MAX6898P Timing Diagram
VCC
VUVLO
tPROPP
tDL
tOFF
tDELAY
t > tPW
tPROPP
IN
ENABLE
OUT
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