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LTC2930
1
2930fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Confi gurable Six Supply
Monitor with Adjustable
Reset Timer, Manual Reset
The LTC
®
2930 is a confi gurable supply monitor for
systems with up to six supply voltages. One of 16 preset or
adjustable voltage monitor combinations can be selected
using an external resistive divider connected to the mode
select pin. The preset voltage thresholds are accurate
to ±1.5% over temperature. The LTC2930 also features
adjustable inputs with a 0.5V nominal threshold.
The reset timeout period is adjustable using an external
capacitor. A reset event may be generated with a manual
reset button on the manual reset input. 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
and may be externally pulled up to an external voltage.
The 52μA supply current makes the LTC2930 ideal for
power conscious systems and it may be confi gured to
monitor fewer than six inputs.
Six Supply Monitor, 5% Threshold
12V, 5V, 3.3V, 1.8V, 1.2V, –5.2V
■
Simultaneously Monitors Six Supplies
■
16 User Selectable Combinations of
5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and
± Adjustable Voltage Thresholds
■
Guaranteed ±1.5% Threshold Accuracy
■
Adjustable Reset Timeout
■
Low Supply Current: 52μA
■
Manual Reset Pin
■
Power Supply Glitch Immunity
■
Guaranteed RST for V
CC
≥ 1V
■
High Temperature Operation to 125°C
■
12-Lead 3mm × 3mm DFN Package
■
Desktop and Notebook Computers
■
Multivoltage Systems
■
Telecom Equipment
■
Portable Battery-Powered Equipment
■
Network Servers
■
Automotive
Voltage Threshold Confi guration Table
V1 (V) V2 (V) V3 (V) V4 (V) V5 (V) V6 (V)
5.0 3.3 2.5 1.8 ADJ ADJ
5.0 3.3 2.5 1.5 ADJ ADJ
5.0 3.3 2.5 ADJ ADJ ADJ
5.0 3.3 1.8 ADJ ADJ ADJ
5.0 3.3 1.8 –ADJ ADJ ADJ
5.0 3.3 ADJ ADJ ADJ ADJ
5.0 3.3 ADJ –ADJ ADJ ADJ
5.0 3.0 2.5 ADJ ADJ ADJ
5.0 3.0 1.8 ADJ ADJ ADJ
5.0 3.0 ADJ ADJ ADJ ADJ
3.3 2.5 1.8 1.5 ADJ ADJ
3.3 2.5 1.8 ADJ ADJ ADJ
3.3 2.5 1.8 –ADJ ADJ ADJ
3.3 2.5 1.5 ADJ ADJ ADJ
3.3 2.5 ADJ ADJ ADJ ADJ
3.3 2.5 ADJ –ADJ ADJ ADJ
LTC2930
–5.2V
1.2V
1.8V
3.3V
5V
12V
2930 TA01
C
RT
47nF
MANUAL RESET
t
RST
= 94ms
MR
RST
VREF
VPG
GND CRT
V1
V2
V3
V4
V5
V6
SYSTEM
LOGIC
121k
1%
16.2k
1%
86.6k
1%
100k
1%
100k
1%
124k
1%
487k
1%
2150k
1%
0.1μF
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6967591, 7119714, 7239251.
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