參數(shù)資料
型號(hào)： LTC2905IDDB
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： Octal Buffer/Driver With 3-State OUtputs 20-VQFN -40 to 85
中文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC8
封裝： 3 X 2 MM, PLASTIC, MO-229WECD-1, DFN-8
文件頁(yè)數(shù)： 7/16頁(yè)
文件大?。?/td> 155K
代理商： LTC2905IDDB
LTC2904/LTC2905
7
sn29045 29045fs
PIU
(TS8 Package/DDB8 Package)
V2 (Pin 1/Pin 4):
Voltage Input 2. Input for V2 monitor.
Select from 3.3V, 2.5V, 1.8V, 1.5V, 1.2V or 1.0V. Refer to
Table 1 for details. The greater of V1, V2 is also the internal
supply voltage, V
CC
. Bypass this pin to ground with a 0.1
μ
F
(or greater) capacitor.
RST (Pin 2/Pin 3):
(LTC2904 Only) Reset Logic Output.
When all voltage inputs are above the reset threshold for
at least the programmed delay time, this pin pulls low. This
pin has a weak pull-up to V
CC
and may be pulled above V
CC
using an external pull-up.
TMR (Pin 2/Pin 3):
(LTC2905 Only) Reset Delay Time
Programming Pin. Attach an external capacitor (C
TMR
) to
GND to set a reset delay time of 9ms/nF. Leaving the pin
open generates a minimum delay of approximately 200
μ
s.
A 22nF capacitor will generate a 200ms reset delay time.
RST (Pin 3/Pin 2):
Inverted Reset Logic Output. Pulls low
when any voltage input is below the reset threshold and is
held low for programmed delay time after all voltage
inputs are above threshold. This pin has a weak pull-up
to V
CC
and may be pulled above V
CC
using an external
pull-up.
GND (Pin 4/Pin 1, Pin 9):
Ground.
TOL (Pin 5/Pin 8):
Three-state Input for Supply Tolerance
Selection (5%, 7.5% or 10%). See the Applications Infor-
mation section for tolerance selection chart (Table 2).
S1 (Pin 6/Pin 7):
Voltage Threshold Select Three-State
Input. Connect to V1, GND or leave unconnected in open
state (See Table 1).
S2 (Pin 7/Pin 6):
The Second Voltage Threshold Select
Three-State Input. Connect to V1, GND or leave uncon-
nected in open state (See Table 1).
V1 (Pin 8/Pin 5):
Voltage Input 1. Input for V1 monitor.
Select from 5V, 3.3V, or 2.5V. See Table 1 for details. The
greater of V1, V2 is also the internal supply voltage, V
CC
.
Bypass this pin to ground with a 0.1
μ
F (or greater)
capacitor.
–
+
–
+
200ms
RESET PULSE
GENERATOR
THREE-STATE DECODER
RESISTOR
NETWORK
POWER
DETECT
BAND GAP
REFERENCE
V
CC
V
CC
LTC2904
2904 BD
S1
TOL
S2
RST
RST
V
CC
GND
V1
V2
6
μ
A
6
μ
A
BLOCK DIAGRA
相關(guān)PDF資料
PDF描述
LTC2904IDDB Precision Dual Supply Monitors with Pin-Selectable Thresholds
LTC2904ITS8 Precision Dual Supply Monitors with Pin-Selectable Thresholds
LTC2908 Precision Six Supply Monitor
LTC2908CDDB-A1 Precision Six Supply Monitor
LTC2908CDDB-B1 Precision Six Supply Monitor
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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