LTC2930CDD#PBF

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.
LTC2930
2
2930fa
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS
V1, V2, V3, V4, V5, V6, VPG, RST ................ –0.3V to 7V
CRT, VREF, MR ...............................–0.3V to (V
CC
+ 0.3V)
Reference Load Current (I
VREF
) .............................. ±1mA
V4 Input Current (–ADJ Mode) ..............................–1mA
RST Current .........................................................±10mA
Operating Temperature Range
LTC2930C ................................................ 0°C to 70°C
LTC2930I.............................................. –40°C to 85°C
LTC2930H .......................................... –40°C to 125°C
Storage Temperature Range ................... –65°C to 150°C
(Notes 1, 2, 3)
TOP VIEW
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
12
11
13
8
9
10
4
5
3
2
1
V6
V2
V4
VREF
VPG
GND
V5
V3
V1
CRT
RST
MR
6
7
T
JMAX
= 130°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) IS GND
(PCB CONNECTION OPTIONAL)
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2930CDD#PBF LTC2930CDD#TRPBF LDMJ 12-Lead 3mm × 3mm DFN 0°C to 70°C
LTC2930IDD#PBF LTC2930IDD#TRPBF LDMJ 12-Lead 3mm × 3mm DFN –40°C to 85°C
LTC2930HDD#PBF LTC2930HDD#TRPBF LDMJ 12-Lead 3mm × 3mm DFN –40°C to 125°C
*The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to: http://www.linear.com/packaging/
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Minimum Internal Operating Voltage RST in Correct Logic State
1V
V
CCMINP
Minimum Required for Mode Selection V
CC
Rising
2.4 V
V
RT50
5V, 5% Reset Threshold V1 Input Threshold
4.600 4.675 4.750 V
V
RT33
3.3V, 5% Reset Threshold V1, V2 Input Threshold
3.036 3.086 3.135 V
V
RT30
3V, 5% Reset Threshold V2 Input Threshold
2.760 2.805 2.850 V
V
RT25
2.5V, 5% Reset Threshold V2, V3 Input Threshold
2.300 2.338 2.375 V
V
RT18
1.8V, 5% Reset Threshold V3, V4 Input Threshold
1.656 1.683 1.710 V
V
RT15
1.5V, 5% Reset Threshold V3, V4 Input Threshold
1.380 1.403 1.425 V
V
RTA
ADJ Reset Threshold V3, V4, V5, V6 Input Threshold
492.5 500 507.5 mV
V
RTAN
–ADJ Reset Threshold V4 Input Threshold
–18 0 18 mV
V
REF
Reference Voltage V
CC
≥ 2.3V, I
VREF
= ±1mA, C
REF
≤ 1000pF
1.192 1.210 1.228 V
V
PG
Mode Selection Voltage Range V
CC
≥ V
CCMINP
0V
REF
V
I
VPG
VPG Input Current V
PG
= V
REF
±20 nA
The denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 5V, unless otherwise specifi ed. (Note 3)
LTC2930
3
2930fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
V1
V1 Input Current V1 = 5V, I
VREF
= 12μA (Note 4)
52 75 μA
I
V2
V2 Input Current V2 = 3.3V
0.8 2 μA
I
V3
V3 Input Current V3 = 2.5V
V3 = 0.55V (ADJ Mode)
0.52 1.2
±15
μA
nA
I
V4
V4 Input Current V4 = 1.8V
V4 = 0.55V (ADJ Mode)
V4 = –0.02V (–ADJ Mode)
0.34 0.8
±15
±15
μA
nA
nA
I
V5
, I
V6
V5, V6 Input Current V5, V6 = 0.55V
±15 nA
I
CRT(UP)
CRT Pull-Up Current V
CRT
= GND
–1.4 –2 –2.6 μA
I
CRT(DN)
CRT Pull-Down Current V
CRT
= 1.3V
10 20 30 μA
t
RST
Reset Timeout Period C
RT
= 1500pF
234 ms
t
UV
V
n
Undervoltage Detect to RST V
n
Less Than Reset Threshold by More
than 1%
150 μs
V
OL
Voltage Output Low RST I
SINK
= 3mA, V
CC
= 3V
I
SINK
= 100μA, V
CC
= 1V
0.15
0.05
0.4
0.3
V
V
V
OH
Voltage Output High RST (Note 5) I
SOURCE
= –1μA
V2-1 V
V
IL
MR Input Threshold Low V
CC
= 3.3V to 5.5V
0.4 V
V
IH
MR Input Threshold High V
CC
= 3.3V to 5.5V
1.6 V
t
MRW
MR Input Pulse Width V
CC
= 3.3V
150 ns
t
MRD
Manual Reset Propagation Delay V
CC
= 3.3V, V
MR
Falling
0.1 1 μs
I
MR
MR Pull-Up Current V
MR
= 1V
–4 –10 –16 μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device reliability
and lifetime.
Note 2: All currents into pins are positive, all voltages are referenced to GND
unless otherwise noted.
Note 3: The greater of V1, V2 is the internal supply voltage (V
CC
).
Note 4: Under static no-fault conditions, V1 will necessarily supply quiescent
current. If at any time V2 is larger than V1, V2 must be capable of supplying
the quiescent current, programming (transient) current and reference load
current.
Note 5: The output pin RST has a diode protected internal pull-up to V2 of
typically 6μA. However, an external pull-up resistor may be used when faster
rise times are required or for V
OH
voltages greater than V2.
ELECTRICAL CHARACTERISTICS
The denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 5V, unless otherwise specifi ed. (Note 3)
V
n
Monitor Timing
t
RST
t
RST
t
MRW
2930 TD
V
RT
V
n
RST
MR
t
UV
t
MRD
TIMING DIAGRAM

LTC2930CDD#PBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits Configurable Six Input Supply Monitor
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union