LTC2913
Dual UV/OV
Voltage Monitor
FEATURES
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DESCRIPTION
The LTC
®
2913 is a dual input voltage monitor intended for
multiple voltages in a variety of applications. Dual inputs for
each voltage allow monitoring two separate undervoltage
(UV) conditions and two separate overvoltage (OV)
conditions. All monitors share a common undervoltage
output and a common overvoltage output. The LTC2913-1
has latching capability for the overvoltage output. The
LTC2913-2 has functionality to disable both the overvoltage
and undervoltage outputs.
Glitch filtering ensures reliable reset operation without
false or noisy triggering.
The LTC2913 provides a precise, versatile, space-con-
scious, micropower solution for voltage monitoring.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Monitors Two Voltages Simultaneously
Adjustable UV and OV Trip Values
Guaranteed Threshold Accuracy: ±1.5%
Input Glitch Rejection
Adjustable Reset Timeout with Disable
44μA Quiescent Current
Open-Drain
OV
and
UV
Outputs
Guaranteed
OV
and
UV
for V
CC
≥ 1V
Available in 10-Lead MSOP and (3mm
×
3mm)
DFN Packages
APPLICATIONS
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Desktop and Notebook Computers
Network Servers
Core, I/O Voltage Monitors
TYPICAL APPLICATION
Dual OV/UV Supply Monitor
5V
POWER
3.3V
SUPPLIES
0.1μF
700
TYPICAL TRANSIENT DURATION (μs)
600
500
400
300
200
V
CC
= 6V
100
V
CC
= 2.3V
0
0.1
1
10
100
COMPARATOR OVERDRIVE PAST THRESHOLD (%)
2913 TA01b
Typical Transient Duration
vs Comparator Overdrive
44.2k
1k
27.4k
RESET OCCURS
ABOVE CURVE
V
CC
VH1
LTC2913-1
VL1
VH2
OV
UV
LATCH
TMR
SYSTEM
4.53k
1k
4.53k
VL2
GND
2913 TA01a
22nF
TIMEOUT = 200ms
2913fb
1
LTC2913
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Terminal Voltages
V
CC
(Note 3)............................................. –0.3V to 6V
OV, UV
................................................... –0.3V to 16V
TMR ..........................................–0.3V to (V
CC
+ 0.3V)
VHn, VLn,
LATCH,
DIS .......................... –0.3V to 7.5V
Terminal Currents
I
VCC
..................................................................+10mA
I
UV
, I
OV
...............................................................10mA
Operating Temperature Range
LTC2913C ................................................ 0°C to 70°C
LTC2913I.............................................. –40°C to 85°C
LTC2913H .......................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSOP ............................................................... 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
TOP VIEW
VH1
VL1
VH2
VL2
GND
1
2
3
4
5
10
9
8
7
6
V
CC
TMR
LATCH
UV
OV
VH1
VL1
VH2
VL2
GND
1
2
3
4
5
11
10 V
CC
9 TMR
8 LATCH
7 UV
6 OV
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 120°C/W
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
ORDER PART NUMBER
LTC2913CMS-1
LTC2913IMS-1
LTC2913HMS-1
TOP VIEW
VH1
VL1
VH2
VL2
GND
1
2
3
4
5
MS PART MARKING*
LTCKK
LTCKK
LTCKK
ORDER PART NUMBER
LTC2913CDD-1
LTC2913IDD-1
LTC2913HDD-1
TOP VIEW
VH1
1
2
3
4
5
11
DD PART MARKING*
LCKN
LCKN
LCKN
10 V
CC
9 TMR
8 DIS
7 UV
6 OV
10
9
8
7
6
V
CC
TMR
DIS
UV
OV
VL1
VH2
VL2
GND
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 120°C/W
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
ORDER PART NUMBER
LTC2913CMS-2
LTC2913IMS-2
LTC2913HMS-2
MS PART MARKING*
LTCKM
LTCKM
LTCKM
ORDER PART NUMBER
LTC2913CDD-2
LTC2913IDD-2
LTC2913HDD-2
DD PART MARKING*
LCKP
LCKP
LCKP
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
*The temperature grade is identified by a label on the shipping container.
2913fb
2
LTC2913
ELECTRICAL CHARACTERISTICS
SYMBOL
V
SHUNT
ΔV
SHUNT
V
CC
V
CCR(MIN)
V
CC(UVLO)
ΔV
CC(UVHYST)
I
CC
V
UOT
t
UOD
I
VHL
t
UOTO
V
LATCH(VIH)
V
LATCH(VIL)
I
LATCH
V
DIS(VIH)
V
DIS(VIL)
I
DIS
I
TMR(UP)
I
TMR(DOWN)
V
TMR(DIS)
V
OH
V
OL
PARAMETER
V
CC
Shunt Regulator Voltage
V
CC
Shunt Regulator Load Regulation
Supply Voltage (Note 3)
Minimum V
CC
Output Valid
Supply Undervoltage Lockout
Supply Undervoltage Lockout Hysteresis
Supply Current
Undervoltage/Overvoltage Threshold
Undervoltage/Overvoltage Threshold to
Output Delay
VHn, VLn Input Current
–40ºC < T
A
< 125ºC
UV/OV
Time-Out Period
OV
Latch Clear Input High
OV
Latch Clear Input Low
LATCH
Input Current
DIS Input High
DIS Input Low
DIS Input Current
TMR Pull-Up Current
TMR Pull-Down Current
Timer Disable Voltage
Output Voltage High
UV/OV
Output Voltage Low
UV/OV
V
DIS
> 0.5V
V
TMR
= 0V
–40ºC < T
A
< 125ºC
V
TMR
= 1.6V
–40ºC < T
A
< 125ºC
Referenced to V
CC
V
CC
= 2.3V, I
UV/OV
= –1μA
V
CC
= 2.3V, I
UV/OV
= 2.5mA
V
CC
= 1V, I
UV
= 100μA
V
LATCH
> 0.5V
C
TMR
= 1nF
–40ºC < T
A
< 125ºC
VHn = V
UOT
– 5mV or VLn = V
UOT
+ 5mV
DIS = 0V
DIS = 0V, V
CC
Rising
DIS = 0V
V
CC
= 2.3V to 6V
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, VLn = 0.45V, VHn = 0.55V, LATCH = V
CC
,
DIS = Open unless otherwise noted. (Note 2)
CONDITIONS
I
CC
= 5mA
–40ºC < T
A
< 125ºC
I
CC
= 2mA to 10mA
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
6.2
6.2
2.3
1.9
5
492
50
TYP
6.6
6.6
200
MAX
6.9
7.0
300
V
SHUNT
1
UNITS
V
V
mV
V
V
V
mV
μA
mV
μs
nA
nA
mS
mS
V
V
μA
V
V
μA
μA
μA
μA
μA
mV
V
2
25
44
500
125
2.1
50
80
508
500
±15
±30
6
6
1.2
8.5
8.5
12.5
14
0.8
±1
1.2
0.8
1
–1.3
–1.2
1.3
1.2
–180
1
0.1
0.01
0.3
0.15
2
–2.1
–2.1
2.1
2.1
–270
3
–2.8
–2.8
2.8
2.8
V
V
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:
V
CC
maximum pin voltage is limited by input current. Since the
V
CC
pin has an internal 6.5V shunt regulator, a low impedance supply that
exceeds 6V may exceed the rated terminal current. Operation from higher
voltage supplies requires a series dropping resistor. See Applications
Information.
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3
LTC2913
TIMING DIAGRAMS
V
Hn
Monitor Timing
V
Hn
V
UOT
t
UOD
UV
1V
2913 TD01
V
Ln
Monitor Timing
V
Ln
V
UOT
t
UOD
OV
1V
2913 TD02
t
UOTO
t
UOTO
V
Hn
Monitor Timing (TMR Pin Strapped to V
CC
)
V
Hn
V
UOT
t
UOD
UV
1V
2913 TD03
V
Ln
Monitor Timing (TMR Pin Strapped to V
CC
)
V
Ln
V
UOT
t
UOD
OV
1V
2913 TD04
t
UOD
t
UOD
TYPICAL PERFORMANCE CHARACTERISTICS
Specifications are at T
A
= 25°C, V
CC
= 3.3V unless otherwise noted.
Input Threshold Voltage
vs Temperature
0.505
0.504
TRHESHOLD VOLTAGE, V
UOT
(V)
0.503
0.502
I
CC
(μA)
0.501
0.500
0.499
0.498
0.497
0.496
0.495
–50
–25
25
50
0
TEMPERATURE (°C)
75
100
2913 G01
Supply Current vs Temperature
55
V
CC
= 5V
50
45
40
35
30
V
CC
= 2.3V
25
–50
–25
25
50
0
TEMPERATURE (°C)
75
100
2913 G02
V
CC
Shunt Voltage
vs Temperature
6.8
6.7
6.6
V
CC
(V)
6.5
6.4
6.3
6.2
–50
10mA
5mA
2mA
V
CC
= 3.3V
1mA
200μA
–25
0
25
50
TEMPERATURE (°C)
75
100
2913 G03
V
CC
Shunt Voltage vs I
CC
6.75
TYPICAL TRANSIENT DURATION (μs)
700
600
500
400
300
200
Typical Transient Duration
vs Comparator Overdrive
0.8
UV
Output Voltage vs V
CC
V
CC
0.6
UV
VOLTAGE (V)
6.65
V
CC
(V)
6.55
RESET OCCURS
ABOVE CURVE
0.4
UV
WITH
10k PULL-UP
0.2
UV
WITHOUT
PULL-UP
0
0
0.2
0.6
0.8
0.4
SUPPLY VOLTAGE, V
CC
(V)
1.0
2913 G06
6.45
–40°C
6.35
25°C
85°C
6.25
–2
0
2
6
4
I
CC
(mA)
8
10
12
V
CC
= 6V
100
V
CC
= 2.3V
0
0.1
1
10
100
COMPARATOR OVERDRIVE PAST THRESHOLD (%)
2913 G05
2913 G04
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LTC2913
TYPICAL PERFORMANCE CHARACTERISTICS
Specifications are at T
A
= 25°C, V
CC
= 3.3V unless otherwise noted.
UV
Output Voltage vs V
CC
5
PULL-DOWN CURRENT, I
UV
(mA)
VHn = 0.55V
SEL = V
CC
5
UV,
I
SINK
vs V
CC
VHn = 0.45V
SEL = V
CC
UV
AT 150mV
3
UV/OV,
V
OL
(V)
1.0
UV/OV
Voltage Output Low vs
Output Sink Current
4
UV
VOLTAGE (V)
4
0.8
25°C
85°C
0.6
–40°C
3
2
2
UV
AT 50mV
1
0.4
1
0.2
0
0
1
3
4
2
SUPPLY VOLTAGE, V
CC
(V)
5
2913 G07
0
0
1
3
4
2
SUPPLY VOLTAGE, V
CC
(V)
5
2913 G08
0
0
5
10
15
20
I
UV/OV
(mA)
25
30
2913 G09
Reset Timeout Period vs
Temperature
12
UV/OV
TIMEOUT PERIOD, t
UOTO
(ms)
11
10
9
8
7
6
–50
C
TMR
= 1nF
10000
UV/OV
TIMEOUT PERIOD, t
UOTO
(ms)
–25
0
25
50
TEMPERATURE (°C)
75
100
2913 G10
Reset Timeout Period vs
Capacitance
1000
100
10
1
0.1
10
100
1
TMR PIN CAPACITANCE, C
TMR
(nF)
1000
2913 G11
PIN FUNCTIONS
DIS (Pin 8, LTC2913-2):
Output Disable Input. Disables
the
OV
and
UV
output pins. When DIS is pulled high, the
OV
and
UV
pins are not asserted except during a UVLO
condition. DIS has a weak (2μA) internal pull-down to
GND. Leave DIS open if unused.
Exposed Pad (Pin 11, DFN Package):
Exposed Pad may
be left open or connected to device ground.
GND (Pin 5):
Device Ground.
LATCH
(Pin 8, LTC2913-1):
OV
Latch Clear/Bypass Input.
When pin is pulled low,
OV
is latched when asserted. When
pulled high,
OV
latch is cleared. While held high,
OV
has
the same delay and output characteristics as
UV.
OV
(Pin 6):
Overvoltage Logic Output. Asserts low when
either VL input voltage is above threshold. Latched low
(LTC2913-1). Held low for programmed delay time after
both VL inputs are valid (LTC2913-2).
OV
has a weak pull-
up to V
CC
and may be pulled above V
CC
using an external
pull-up. Leave
OV
open if unused.
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FPGA/CPLD
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