LTC1929I Просмотр технического описания (PDF) - Linear Technology
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LTC1929I Datasheet PDF : 28 Pages
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LTC1929/LTC1929-PG
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
ISCL
RUN/SS Discharge Current
Soft Short Condition VEAIN = 0.5V;
VRUN/SS = 4.5V
0.5
2.0
4.0
µA
ISDLHO
Shutdown Latch Disable Current
VEAIN = 0.5V
1.6
5
µA
ISENSE
Total Sense Pins Source Current
Each Channel: VSENSE1–, 2 – = VSENSE1+, 2+ = 0V
– 85 – 60
µA
DFMAX
Maximum Duty Factor
In Dropout
98
99.5
%
Top Gate Transition Time:
TG1, 2 tr
TG1, 2 tf
Rise Time
Fall Time
CLOAD = 3300pF
CLOAD = 3300pF
30
90
ns
40
90
ns
Bottom Gate Transition Time:
BG1, 2 tr
BG1, 2 tf
Rise Time
Fall Time
CLOAD = 3300pF
CLOAD = 3300pF
30
90
ns
20
90
ns
TG/BG t1D
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time CLOAD = 3300pF Each Driver
90
ns
BG/TG t2D
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
CLOAD = 3300pF Each Driver
90
ns
tON(MIN)
Minimum On-Time
Tested with a Square Wave (Note 6)
180
ns
Internal VCC Regulator
VINTVCC
Internal VCC Voltage
6V < VIN < 30V; VEXTVCC = 4V
4.8
5.0
5.2
V
VLDO INT
INTVCC Load Regulation
ICC = 0 to 20mA; VEXTVCC = 4V
0.2
1.0
%
VLDO EXT
EXTVCC Voltage Drop
ICC = 20mA; VEXTVCC = 5V
120 240
mV
VLDO EXT-PG EXTVCC Voltage Drop
ICC = 20mA, VEXTVCC = 5V, LTC1929-PG
80
160
mV
VEXTVCC
EXTVCC Switchover Voltage
ICC = 20mA, EXTVCC Ramping Positive
q 4.5
4.7
V
VLDOHYS
EXTVCC Switchover Hysteresis
ICC = 20mA, EXTVCC Ramping Negative
0.2
V
Oscillator and Phase-Locked Loop
fNOM
fLOW
fHIGH
RPLLIN
IPLLFLTR
Nominal Frequency
Lowest Frequency
Highest Frequency
PLLIN Input Resistance
Phase Detector Output Current
Sinking Capability
Sourcing Capability
RRELPHS
Controller 2-Controller 1 Phase
PGOOD Output (LTC1929-PG Only)
VPLLFLTR = 1.2V
VPLLFLTR = 0V
VPLLFLTR ≥ 2.4V
fPLLIN < fOSC
fPLLIN > fOSC
190 220 250
kHz
120 140 160
kHz
280 310 360
kHz
50
kΩ
– 15
µA
15
µA
180
Deg
VPGL
IPGOOD
VPG
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
Differential Amplifier/Op Amp Gain Block (Note 5)
IPGOOD = 2mA
VPGOOD = 5V
VEAIN with Respect to Set Output Voltage
VEAIN Ramping Negative
VEAIN Ramping Positive
0.1
0.3
V
±1
µA
–6
–7.5 – 9.5
%
6
7.5
9.5
%
ADA
CMRRDA
RIN
VOS
Gain
Common Mode Rejection Ratio
Input Resistance
Input Offset Voltage
Differential Amp Mode
Differential Amp Mode; 0V < VCM < 5V
Differential Amp Mode; Measured at VOS+ Input
Op Amp Mode; VCM = 2.5V; VDIFFOUT = 5V;
IDIFFOUT = 1mA (LTC1929 Only)
0.995
1
1.005
V/V
46
55
dB
80
kΩ
6
mV
3
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