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LTM4628
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal
operating temperature range (Note 2). Specified as each individual output channel. T A = 25°C, V IN = 12V and VRUN1, VRUN2 at 5V
unless otherwise n oted, per the typical application i n Figure 28.
SYMBOL
I TRACK1 , I TRACK2
UVLO
PARAMETER
Track Pin Soft-Start Pull-Up Current
Undervoltage Lockout Threshold
CONDITIONS
TRACK1, TRACK2 = 0V
V IN Falling
V IN Rising
MIN
1
TYP
1.25
3.3
3.9
MAX
1.5
UNITS
μA
V
V
UVLO Hysteresis
0.6
V
t ON(MIN)
Minimum On-Time
(Note 6)
90
ns
R FBHI1 , R FBHI2
V OL_PGOOD
(Each Channel)
Resistor Between V OUTS1 , V OUTS2
and V FB1 , V FB2 Pins for Each Output
PGOOD Voltage Low
I PGOOD = 2mA
60.05
60.4
0.1
60.75
0.3
k?
V
I PGOOD
V PGOOD
PGOOD Leakage Current
PGOOD Trip Level
V PGOOD = 5V
V FB with Respect to Set Output Voltage
V FB Ramping Negative
V FB Ramping Positive
–10
10
±5
μA
%
%
INTV CC Linear Regulator
V INTVCC
V INTVCC
Load Regulation
V EXTVCC
V EXTVCC(DROP)
Internal V CC Voltage
INTV CC Load Regulation
EXTV CC Switchover Voltage
EXTV CC Dropout
6V < V IN < 26.5V
I CC = 0mA to 50mA
EXTV CC Ramping Positive
I CC = 20mA, V EXTVCC = 5V
4.8
4.5
5
0.5
4.7
50
5.2
2
100
V
%
V
mV
V EXTVCC(HYST)
EXTV CC Hysteresis
200
mV
Oscillator and Phase-Locked Loop
f NOM
f LOW
f HIGH
I fSET
Nominal Frequency
Lowest Frequency
Highest Frequency
Frequency Set Current
f SET = 1.2V
f SET = 0V (Note 5)
f SET > 2.4V, Up to INTV CC
450
210
700
9
500
250
780
10
550
290
860
11
kHz
kHz
kHz
μA
R MODE_PLLIN
Mode_PLLIN Input Resistance
250
kΩ
Ph CLKOUT
V OH_CLKOUT
V OL_CLKOUT
Phase (Relative to V OUT1 )
Clock High Output Voltage
Clock Low Output Voltage
PHASMD = GND
PHASMD = Float
PHASMD = INTV CC
2
60
90
120
0.2
Deg
Deg
Deg
V
V
Differential Amplifier
A V
Voltage Gain
1
V/V
R IN
V OS
PSRR
I CL
DIFFOUT (MAX)
GBW
Input Resistance
Input Offset Voltage
Power Supply Rejection Ratio
Maximum Output Current
Maximum Output Voltage
Gain Bandwidth Product
Measured at DIFFP Input
V DIFFP = V DIFFOUT = 1.5V, I DIFFOUT = 100μA
5V < V IN < 20V
I DIFFOUT = 300μA
INTV CC – 1.4V
80
90
3
3
3
k?
mV
dB
mA
V
MHz
4628fe
4
For more information www.linear.com/LTM4628
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