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LTC2928 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC2928
Description  Multichannel Power Supply Sequencer and Supervisor
PDF  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2928 Datasheet(HTML) 3 Page - Linear Technology

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LTC2928
3
2928f
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VCC = 3.3V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Pins: VCC, HVCC
VVCC
VCC Input Supply Range
●
2.9
6
V
IVCC
VCC Input Supply Current
HVCC = GND
●
1
2.5
mA
VUVL
VCC Input Supply Undervoltage Lockout VCC Rising
●
2.75
2.8
2.85
V
VUVL(HYST)
Undervoltage Lockout Hysteresis
●
50
100
150
mV
VHVCC
High Voltage Input Supply Range
●
7.2
12
16.5
V
VCC(REG)
Regulated VCC from HVCC
VHVCC = 12V
●
3.2
3.3
3.4
V
IREG
Regulated VCC Output Current to
External Load (Note 2)
●
–10
mA
IHVCC
HVCC Input Supply Current
IREG = 0mA, VHVCC = 12V
●
1
2
mA
Sequence Up/Down Pin: ON
VON
ON Threshold Voltage
VON Rising
●
0.985
1.00
1.015
V
VON(HYST)
ON Hysteresis
●
20
30
40
mV
ION(LKG)
ON Leakage Current
VON = 1V
●
±50
nA
Voltage Monitor Pins: V1, V2, V3, V4
VMON(TH)
Reset Threshold Voltage
V1 Negative Threshold Voltage
VSEL = VCC
●
●
0.4925
0.500
0.5075
±18
V
mV
VSEQ(TH)
Sequencing Thresholds
0.67 VMON(TH)
0.33 VMON(TH)
0.10 VMON(TH)
See Table 4
●
●
●
0.315
0.149
0.032
0.333
0.167
0.05
0.351
0.185
0.068
V
V
V
IMON(LKG)
Monitor Pin Leakage Current
VMON = 0.55V
●
±15
nA
tMON(UV)
Undervoltage Pulse Width Required to
Trip Comparators
VMON below VMON(TH) by 1%
225
μs
tMON(OV)
Overvoltage Pulse Width Required to
Trip OV
VMON above Overvoltage Threshold by
1%
225
μs
Supply Enable Pins: EN1, EN2, EN3, EN4
VEN
Enable Pin Voltage Output in On State
IEN = –1μA
●
VCC + 4.5
VCC +
5.5
VCC + 6
V
IEN(UP)
Enable Pin Pull-Up Current
Enable Pin On, VEN ≤ (VCC + 4V)
●
–7.5
–10
–12.5
μA
VEN(OL)
Enable Pin Voltage Output Low
IEN = 2.5mA
●
0.25
0.4
V
Comparator Outputs: CMP1, CMP2, CMP3, CMP4
VCMP(OL)
Comparator Voltage Output Low
ICMP = 2.5mA
●
0.15
0.3
V
VCMP(OH)
Comparator Voltage Output High
(Note 4)
ICMP = –1μA
●
VCC – 1
V
Three-State Selection Inputs: SQT1, SQT2, MS1, MS2, RDIS
VIL
Voltage Input Low Threshold
●
0.4
V
VIH
Voltage Input High Threshold
●
1.4
V
IHZ
High Z Pin Current
VHZ = 0.7V
VHZ = 1.1V
●
●
–10
10
μA
μA
Positive/Negative Selection Input: VSEL
VIL
Voltage Input Low Threshold
●
0.4
V
VIH
Voltage Input High Threshold
●
1.4
V
ELECTRICAL CHARACTERISTICS



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