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LTC1326I-2.5 Datasheet

  • LTC1326I-2.5

  • Micropower Precision Triple Supply Monitors

  • 16頁(yè)

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LTC1326/LTC1326-2.5
Micropower Precision
Triple Supply Monitors
FEATURES
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
Simultaneously Monitors Three Supplies
LTC1326: 5V, 3.3V and ADJ
LTC1326-2.5: 2.5V, 3.3V and ADJ
Guaranteed Threshold Accuracy:
鹵0.75%
Low Supply Current: 20碌A(chǔ)
Internal Reset Time Delay: 200ms
Manual Push-Button Reset Input
Active Low and Active High Reset Outputs
Active Low 鈥淪oft鈥?Reset Output
Power Supply Glitch Immunity
Guaranteed RESET for V
CC3
鈮?/div>
1V or V
CC5
鈮?/div>
1V
or V
CC25
鈮?/div>
1V
8-Pin SO and MSOP Packages
The LTC
廬
1326/LTC1326-2.5 are triple supply monitors
intended for systems with multiple supply voltages. They
provide micropower operation, small size and high accu-
racy supply monitoring.
Tight 0.75% threshold accuracy and glitch immunity
ensure reliable reset operation without false triggering.
The 20碌A(chǔ) typical supply current makes the LTC1326/
LTC1326-2.5 ideal for power-conscious systems.
The RST output is guaranteed to be in the correct state for
V
CC3
, V
CC5
or V
CC25
down to 1V. The LTC1326/LTC1326-2.5
can be configured to monitor one, two or three inputs,
depending on system requirements.
A manual push-button reset input provides the ability to
generate a very narrow 鈥渟oft鈥?reset pulse (100碌s typ) or a
200ms reset pulse equivalent to a power-on reset. Both
SRST and RST outputs are open-drain and can be OR-tied
with other reset sources.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
Desktop Computers
Notebook Computers
Intelligent Instruments
Portable Battery-Powered Equipment
TYPICAL APPLICATIO
DC/DC
CONVERTER
2.5V
3.3V
V
CORE
RST Output Voltage vs Supply Voltage (LTC1326-2.5)
3.5
SYSTEM
LOGIC
3.0
RST OUTPUT VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
V
CC25
= V
CCA
= V
CC3
4.7k PULL-UP FROM RST TO V
CC3
T
A
= 25擄C
0.1碌F
V
CC25
V
CC3
V
CCA
LTC1326-2.5
RST
PBR
PUSH-BUTTON
RESET
GND
SRST
0
0
0.5
1.0
1.5 2.0
V
CC3
(V)
2.5
3.0
3.5
1326/2.5 TA01
U
1326/2.5 TA02
U
U
1

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