LTC2913.pdf 데이터시트 (총 12 페이지) - 파일 다운로드 LTC2913 데이타시트 다운로드

No Preview Available !

FEATURES
n Monitors Two Voltages Simultaneously
n Adjustable UV and OV Trip Values
n Guaranteed Threshold Accuracy: ±1.5%
n Input Glitch Rejection
n Adjustable Reset Timeout with Disable
n 44μA Quiescent Current
n Open-Drain OV and UV Outputs
n Guaranteed OV and UV for VCC ≥ 1V
n Available in 10-Lead MSOP and (3mm × 3mm)
DFN Packages
APPLICATIONS
n Desktop and Notebook Computers
n Network Servers
n Core, I/O Voltage Monitors
LTC2913
Dual UV/OV
Voltage Monitor
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.
TYPICAL APPLICATION
Dual OV/UV Supply Monitor
5V
POWER
SUPPLIES
3.3V
0.1μF
44.2k
1k
4.53k
27.4k
1k
4.53k
VCC
VH1
LTC2913-1
VL1 OV
VH2 UV
SYSTEM
VL2
GND
LATCH
TMR
22nF
2913 TA01a
TIMEOUT = 200ms
Typical Transient Duration
vs Comparator Overdrive
700
600
500
RESET OCCURS
ABOVE CURVE
400
300
200
100
VCC = 2.3V
0
0.1 1
VCC = 6V
10
100
COMPARATOR OVERDRIVE PAST THRESHOLD (%)
2913 TA01b
2913fb
1

No Preview Available !

LTC2913
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
Terminal Voltages
VCC (Note 3)............................................. –0.3V to 6V
OV, UV ................................................... –0.3V to 16V
TMR..........................................–0.3V to (VCC + 0.3V)
VHn, VLn, LATCH, DIS .......................... –0.3V to 7.5V
Terminal Currents
IVCC ..................................................................+10mA
IUV, IOV...............................................................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
VH1 1
VL1 2
VH2 3
VL2 4
GND 5
TOP VIEW
10 VCC
9 TMR
8 LATCH
7 UV
6 OV
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 120°C/W
ORDER PART NUMBER
LTC2913CMS-1
LTC2913IMS-1
LTC2913HMS-1
MS PART MARKING*
LTCKK
LTCKK
LTCKK
VH1 1
VL1 2
VH2 3
VL2 4
GND 5
TOP VIEW
10 VCC
9 TMR
8 DIS
7 UV
6 OV
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 120°C/W
ORDER PART NUMBER MS PART MARKING*
LTC2913CMS-2
LTC2913IMS-2
LTC2913HMS-2
LTCKM
LTCKM
LTCKM
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.
2
TOP VIEW
VH1 1
VL1 2
VH2 3
VL2 4
GND 5
10 VCC
9 TMR
11 8 LATCH
7 UV
6 OV
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
ORDER PART NUMBER DD PART MARKING*
LTC2913CDD-1
LTC2913IDD-1
LTC2913HDD-1
LCKN
LCKN
LCKN
TOP VIEW
VH1 1
VL1 2
10 VCC
9 TMR
VH2 3 11 8 DIS
VL2 4
7 UV
GND 5
6 OV
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
ORDER PART NUMBER DD PART MARKING*
LTC2913CDD-2
LTC2913IDD-2
LTC2913HDD-2
LCKP
LCKP
LCKP
2913fb

No Preview Available !

LTC2913
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, VLn = 0.45V, VHn = 0.55V, LATCH = VCC,
DIS = Open unless otherwise noted. (Note 2)
SYMBOL
VSHUNT
PARAMETER
VCC Shunt Regulator Voltage
ΔVSHUNT
VCC
VCCR(MIN)
VCC(UVLO)
ΔVCC(UVHYST)
ICC
VUOT
tUOD
IVHL
VCC Shunt Regulator Load Regulation
Supply Voltage (Note 3)
Minimum VCC Output Valid
Supply Undervoltage Lockout
Supply Undervoltage Lockout Hysteresis
Supply Current
Undervoltage/Overvoltage Threshold
Undervoltage/Overvoltage Threshold to
Output Delay
VHn, VLn Input Current
tUOTO
UV/OV Time-Out Period
VLATCH(VIH)
VLATCH(VIL)
ILATCH
VDIS(VIH)
VDIS(VIL)
IDIS
ITMR(UP)
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
ITMR(DOWN) TMR Pull-Down Current
VTMR(DIS)
VOH
VOL
Timer Disable Voltage
Output Voltage High UV/OV
Output Voltage Low UV/OV
CONDITIONS
ICC = 5mA
–40ºC < TA < 125ºC
ICC = 2mA to 10mA
DIS = 0V
DIS = 0V, VCC Rising
DIS = 0V
VCC = 2.3V to 6V
VHn = VUOT – 5mV or VLn = VUOT + 5mV
–40ºC < TA < 125ºC
CTMR = 1nF
–40ºC < TA < 125ºC
VLATCH > 0.5V
VDIS > 0.5V
VTMR = 0V
–40ºC < TA < 125ºC
VTMR = 1.6V
–40ºC < TA < 125ºC
Referenced to VCC
VCC = 2.3V, IUV/OV = –1μA
VCC = 2.3V, IUV/OV = 2.5mA
VCC = 1V, IUV = 100μA
MIN
l 6.2
l 6.2
l
l 2.3
l
l 1.9
l5
l
l 492
l 50
TYP MAX UNITS
6.6 6.9
V
6.6 7.0
V
200 300
mV
VSHUNT
1
V
V
2 2.1
V
25 50
mV
44 80
μA
500 508
mV
125 500
μs
l ±15
l ±30
l6
8.5 12.5
l6
8.5 14
l 1.2
l 0.8
l ±1
l 1.2
l 0.8
l1 2 3
l –1.3 –2.1 –2.8
l –1.2 –2.1 –2.8
l 1.3 2.1 2.8
l 1.2 2.1 2.8
l –180 –270
l1
l 0.1 0.3
l 0.01 0.15
nA
nA
mS
mS
V
V
μA
V
V
μA
μA
μA
μA
μA
mV
V
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: VCC maximum pin voltage is limited by input current. Since the
VCC 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.
2913fb
3

No Preview Available !

LTC2913
TIMING DIAGRAMS
VHn Monitor Timing
VHn VUOT
tUOD
tUOTO
UV 1V
2913 TD01
VHn Monitor Timing (TMR Pin Strapped to VCC)
VHn VUOT
UV 1V
tUOD
tUOD
2913 TD03
VLn Monitor Timing
VLn VUOT
tUOD
tUOTO
OV 1V
2913 TD02
VLn Monitor Timing (TMR Pin Strapped to VCC)
VLn VUOT
OV 1V
tUOD
tUOD
2913 TD04
TYPICAL PERFORMANCE CHARACTERISTICS
Specifications are at TA = 25°C, VCC = 3.3V unless otherwise noted.
Input Threshold Voltage
vs Temperature
0.505
Supply Current vs Temperature
55
0.504
0.503
VCC = 5V
50
0.502
0.501
45
VCC = 3.3V
0.500
40
0.499
0.498
35
0.497
0.496
30
VCC = 2.3V
0.495
–50 –25
0
25 50 75 100
TEMPERATURE (°C)
25
–50 –25
0
25 50 75 100
TEMPERATURE (°C)
2913 G01
2913 G02
VCC Shunt Voltage vs ICC
6.75
6.65
6.55
6.45
–40°C
6.35 25°C
85°C
6.25
–2 0 2 4 6 8 10 12
ICC (mA)
2913 G04
4
Typical Transient Duration
vs Comparator Overdrive
700
600
500
RESET OCCURS
ABOVE CURVE
400
300
200
100
VCC = 2.3V
0
0.1 1
VCC = 6V
10
100
COMPARATOR OVERDRIVE PAST THRESHOLD (%)
2913 G05
VCC Shunt Voltage
vs Temperature
6.8
6.7 10mA
6.6 5mA
6.5 2mA
6.4 1mA
6.3 200μA
6.2
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
2913 G03
UV Output Voltage vs VCC
0.8
VCC
0.6
0.4
0.2
0
0
UV WITHOUT
PULL-UP
UV WITH
10k PULL-UP
0.2 0.4 0.6 0.8 1.0
SUPPLY VOLTAGE, VCC (V)
2913 G06
2913fb

No Preview Available !

LTC2913
TYPICAL PERFORMANCE CHARACTERISTICS
Specifications are at TA = 25°C, VCC = 3.3V unless otherwise noted.
UV Output Voltage vs VCC
5
VHn = 0.55V
SEL = VCC
4
3
UV, ISINK vs VCC
5
VHn = 0.45V
SEL = VCC
4
UV AT 150mV
3
UV/OV Voltage Output Low vs
Output Sink Current
1.0
0.8
25°C
85°C
–40°C
0.6
2 2 0.4
UV AT 50mV
1 1 0.2
0
01 2 345
SUPPLY VOLTAGE, VCC (V)
2913 G07
0
01 2 345
SUPPLY VOLTAGE, VCC (V)
2913 G08
0
0 5 10 15 20 25 30
IUV/OV (mA)
2913 G09
Reset Timeout Period vs
Temperature
12
CTMR = 1nF
11
10
Reset Timeout Period vs
Capacitance
10000
1000
9 100
8
10
7
6
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
2913 G10
1
0.1 1 10 100 1000
TMR PIN CAPACITANCE, CTMR (nF)
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 VCC and may be pulled above VCC using an external
pull-up. Leave OV open if unused.
2913fb
5