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LTC3604 数据表(PDF) 3 Page - Linear Technology

部件名 LTC3604
功能描述  Dual Channel 3A, 20V Monolithic Synchronous Step-Down Regulator
PDF  28 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3604 数据表(HTML) 3 Page - Linear Technology

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LTC3633A/LTC3633A-1
3
3633a1f
The
l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN1 = VIN2 = 12V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN1
Supply Range
l
3.6
20
V
VIN1 Supply Range
VIN2 Supply Range
3.6V < VIN1 < 20V
l
l
3.6
1.5
20
20
V
V
Output Voltage Range (Note 4)
LTC3633A, VON = VOUT
LTC3633A-1, VON = VOUT
0.6
1.5
6
12
V
V
IQ
Input DC Supply Current (VIN1 + VIN2)
Both Channels Active (Note 5)
Sleep Current
Shutdown
MODE = 0V
MODE = INTVCC, VFB1, VFB2 > 0.6
RUN1 = RUN2 = 0V
1.3
500
13
mA
μA
μA
VFB
Feedback Reference Voltage
l
0.594
0.6
0.606
V
ΔVLINE_REG
Reference Voltage Line Regulation
VIN = 3.6V to 20V
0.002
%/V
ΔVLOAD_REG
Output Voltage Load Regulation
ITH = 0.8V to 1.6V
0.05
%
IFB
Feedback Pin Input Current
±30
nA
gm(EA)
Error Amplifier Transconductance
ITH = 1.2V
1.8
mS
tON
Minimum On Time
VON = 0.6V, VIN = 4V
20
ns
tOFF
Minimum Off Time
VIN = 6V
45
ns
fOSC
Oscillator Frequency
VRT = INTVCC
RT = 162k
RT = 80.6k
1.4
1.7
3.4
2
2
4
2.6
2.3
4.6
MHz
MHz
MHz
ILIM
Valley Switch Current Limit
2.6
3.5
4.5
A
RDS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
130
65
mΩ
mΩ
ISW(LKG)
Switch Leakage Current
VIN = 20V, VRUN = 0V
0.01
±1
μA
VVIN-OV
VIN Overvoltage Lockout Threshold
VIN Rising
VIN Falling
20.3
22.5
21.5
22.5
V
V
INTVCC Voltage
3.6V < VIN < 20V, 0mA Load
3.1
3.3
3.5
V
INTVCC Load Regulation
0mA to 50mA Load, VIN = 4V to 20V
1.3
%
RUN Threshold Rising
RUN Threshold Falling
l
l
1.18
0.98
1.22
1.01
1.26
1.04
V
V
RUN Leakage Current
VIN = 20V
0
±3
μA
V2P5 Voltage
ILOAD = 0mA to 10mA
l
2.46
2.5
2.54
V
PGOOD Good-to-Bad Threshold
VFB Rising
VFB Falling
8
–8
10
–10
%
%
PGOOD Bad-to-Good Threshold
VFB Rising
VFB Falling
–3
3
–5
5
%
%
RPGOOD
PGOOD Pull-Down Resistance
10mA Load
20
Ω
tPGOOD
Power Good Filter Time
20
40
μs
tSS
Internal Soft-Start Time
10% to 90% Rise Time
400
700
μs
VFB During Tracking
TRACKSS = 0.3V
0.28
0.3
0.315
V
ITRACKSS
TRACKSS Pull-Up Current
1.4
μA



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