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LTC2901-1IGN Datasheet

  • LTC2901-1IGN

  • Programmable Quad Supply Monitor with Adjustable Reset and W...

  • 16頁

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Final Electrical Specifications
LTC2901
Programmable Quad Supply
Monitor with Adjustable Reset
and Watchdog Timers
June 2002
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
Simultaneously Monitors Four Supplies
16 User Selectable Combinations of 5V, 3.3V, 3V,
2.5V, 1.8V, 1.5V and/or
鹵Adjustable
Voltage
Thresholds
Guaranteed Threshold Accuracy:
鹵1.5%
of
Monitored Voltage Over Temperature
Low Supply Current: 43碌A(chǔ) Typ
Adjustable Reset Time
Adjustable Watchdog Time
Open-Drain RST Output (LTC2901-1)
Push-Pull RST Output (LTC2901-2)
Individual Nondelayed Monitor Output for Each Supply
Power Supply Glitch Immunity
Guaranteed RST for V
CC
鈮?/div>
1V
The LTC
廬
2901 is a programmable supply monitor for
systems with up to four supply voltages. One of 16 preset
or adjustable voltage monitor combinations can be se-
lected using an external resistor divider connected to the
program pin. The preset voltage thresholds are accurate
to 1.5% over temperature. All four voltage comparator
outputs are connected to separate pins for individual
supply monitoring.
The reset and watchdog delay times are adjustable using
external capacitors. Tight voltage threshold accuracy and
glitch immunity ensure reliable reset operation without
false triggering. The RST output is guaranteed to be in the
correct state for V
CC
down to 1V. The LTC2901-1 features
an open-drain RST output, while the LTC2901-2 has a
push-pull RST output.
The 43碌A(chǔ) supply current makes the LTC2901 ideal for
power conscious systems and it may be configured to
monitor less than four inputs. The parts are available in
the 16-lead narrow SSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
Desktop and Notebook Computers
Multivoltage Systems
Telecom Equipment
Portable Battery-Powered Equipment
Network Servers
TYPICAL APPLICATIO
Quadruple Supply Monitor (5V, 3.3V, 2.5V, 1.8V)
5V
3.3V
DC/DC
CONVERTER
2.5V
1.8V
3
V3
4
V1
14
C1
0.1碌F
C2
0.1碌F
13
V4
COMP1
2
R3
10k
POWER
GOOD
SYSTEM
LOGIC
V2
12
V
REF
R1
59k
1%
R2
40.2k
1%
11
V
PG
10
16
COMP2
LTC2901-2
1
COMP3
15
COMP4
8
WDI
7
WDO
6
RST
CWT
C
RT
47nF
9
C
WT
47nF
5
GND CRT
t
RST
= 216ms
t
WD
= 940ms
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
2901 TA01
U
U
2901is sn2901
1

LTC2901-1IGN 產(chǎn)品屬性

  • LTC2901

  • 100

  • 集成電路 (IC)

  • PMIC - 監(jiān)控器

  • -

  • 多壓監(jiān)控器

  • 4

  • 開路漏極或開路集電極

  • 低有效

  • 最小為 5 ms

  • 16 種可選閥值組合

  • -40°C ~ 85°C

  • 表面貼裝

  • 16-SSOP（0.154"，3.90mm 寬）

  • 16-SSOP

  • 管件

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