LTC2922C データシートの表示（PDF） - Linear Technology
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LTC2922C Datasheet PDF : 20 Pages
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LTC2921/LTC2922 Series
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V for LTC2921/LTC2922, VCC = 3.3V for
LTC2921-3.3/LTC2922-3.3, and VCC = 2.5V for LTC2921-2.5/LTC2922-2.5, unless otherwise noted.
SYMBOL
PARAMETER
VCC(UVLO)
Supply Undervoltage Lockout
VCC(UVH)
Supply Undervoltage Hysteresis
Electronic Circuit Breaker
∆VSENSE
ISENSE
tV1(DLY)
Circuit Breaker Trip Voltage
SENSE Pin Input Current
Circuit Breaker Trip Delay Time
tV1(RST)
VV1(RST)
Monitor Inputs
VMON
Circuit Breaker Reset Pulse Width
Circuit Breaker Reset Threshold Voltage
V1-V4 Monitor Threshold Voltages
CONDITIONS
VCC Rising
VCC Falling
∆VSENSE = VCC - VSENSE
VCC - VSENSE = 150mV
LTC2921/LTC2922
LTC2921-3.3/LTC2922-3.3
LTC2921-2.5/LTC2922-2.5
Guaranteed Not to Reset
Guaranteed to Reset
VOV
IMON
TIMER Pin
VTIMER(TH)
ITIMER(PU)
ITIMER(PD)
VTIMER(CLR)
GATE Pin
VGATE
V1-V4 Overvoltage Thresholds
V1-V4 Input Currents
TIMER Ramp Threshold Voltage
TIMER Pull-Up Current
TIMER Pull-Down Current
TIMER Cleared Threshold Voltage
GATE Drive Output Voltage
IGATE(PU)
GATE Pull-Up Current
IGATE(PD)
GATE Pull-Down Current
Remote Sense Switches
RDS(FB)
PG Pin
Feedback Switch Resistances (Note 3)
IPG(PU)
IPG(PD)
VPG(OL)
VPG
PG Pull-Up Current
PG Pull-Down Current
PG Output Low Voltage
PG Output Voltage (Note 4)
VTIMER = 1V
VCC = 2.35V, VTIMER = 0.4V
VTIMER Falling
LTC2921/LTC2922
LTC2921-3.3/LTC2922-3.3
LTC2921-2.5/LTC2922-2.5
VGATE = VCC
VCC = 2.35V, VGATE = 2.35V
VD = VCC
VPG = VCC
VCC = 2.35V, VPG = 2.35V
VCC = 2.35V, IPG = 5mA
LTC2921/LTC2922
LTC2921-3.3/LTC2922-3.3
LTC2921-2.5/LTC2922-2.5
MIN TYP MAX UNITS
q 2.08 2.20 2.30
V
120
mV
q 45
50
55
mV
150
500
nA
0.5
1.5
3.0
µs
0.5
1.5
3.0
µs
0.5
1.5
6.0
µs
q
q 150
50
µs
µs
q 0.490 0.500 0.510
V
0.495 0.500 0.505
V
q 0.492 0.500 0.508
V
q 0.665 0.700 0.735
V
±0.1
µA
q 1.15 1.20 1.25
V
q –1.3 –2.0 –2.5
µA
100
µA
150 250
mV
q 10.0 11.1 12.2
V
q 8.4
9.1
9.8
V
q 6.1
6.8
7.5
V
q –6.5 –10.0 –12.5
µA
10
mA
q
2
10
Ω
q –2.6 –4.0 –5.0
µA
10
mA
q
0.4
V
q 10.0 11.1 12.2
V
q 8.4
9.1
9.8
V
q 6.1
6.8
7.5
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: TJ is calculated from the ambient temperature TA and power
dissipation PD as follows:
LTC2921 Series: TJ = TA + (PD • 110°C/W)
LTC2922 Series: TJ = TA + (PD • 90°C/W)
Note 3: This specification applies to all switches, and is measured with
VS < VD.
Note 4: The PG pin will rise to approximately the same voltage as the
GATE pin when not pulled up or pulled down by external resistance.
29212fa
3
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