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LT8685SRVPBF 数据表(PDF) 3 Page - Analog Devices

部件名 LT8685SRVPBF
功能描述  42V Quad, Gangable, Synchronous, Monolithic Step-Down Regulator
PDF  24 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

LT8685SRVPBF 数据表(HTML) 3 Page - Analog Devices

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LT8685S
3
Rev. 0
For more information www.analog.com
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Quiescent Current, Shutdown
0.5
1.5
µA
Total Operating Input Current, Burst
VOUT1 = VBIAS = 5V, VOUT2 = 3.3V, VOUT3 = 1.8V,
VOUT4 = 1.2V, VSYNC/MODE = 0V, No Load
12
µA
Total Operating Input Current, Pulse-Skipping
VOUT1 = 5V, VOUT2 = 3.3V, VOUT3 = 1.8V, VOUT4 = 1.2V,
VSYNC/MODE = Floating, No Load
1100
µA
Switching Frequency
RRT = 154k
RRT = 22.6k
RRT = 13.7k
l
l
l
0.28
1.8
2.65
0.35
2
3
0.45
2.25
3.4
MHz
MHz
MHz
SYNC Threshold Voltage
VIL
VIH
l
l
1.5
0.4
V
V
SYNC/MODE Pin Input Current
VSYNC/MODE = 6V
75
µA
Internal VCC Regulator
3.4
V
Internal VCC Undervoltage Lockout
Falling
2.3
2.4
2.5
V
BIAS Pin Threshold
4.5
V
Channels 1 to 2
Minimum Input Voltage (CH1 Only)
l
2.8
3
V
Feedback Reference Voltage
l
0.786
0.8
0.812
V
Feedback Input Current
l
–100
0
100
nA
VFB1, VFB2 Line Regulation
VVIN1 = 3V to 42V
0.01
%/V
Peak Current Limit
4.2
4.8
5.4
A
Power FET On-resistance
Main Switch (Top)
Synchronous Switch (Bottom)
ISW1, ISW2 = 0.1A
ISW1, ISW2 = 0.1A
210
110
mΩ
mΩ
EN/UVLO Threshold
EN/UVLO Falling
l
0.78
0.8
0.82
V
EN/UVLO Hysteresis
100
mV
EN/UVLO Input Current
VEN/UVLO = 42V
–250
0
250
nA
EN2 Threshold
EN2 Falling
l
0.78
0.81
0.84
V
EN2 Hysteresis
50
mV
EN2 Input Current
VEN2 = 42V
–250
0
250
nA
Pgood Upper Threshold Offset from VFB1, VFB2
VFB1, VFB2 Rising
l
4.5
7.5
10
%
Pgood Lower Threshold Offset from VFB1, VFB2
VFB1, VFB2 Falling
l
–10
–7.5
–4.5
%
Pgood Hysteresis
1.2
%
Pgood Leakage
VPG1, VPG2 = 6V
–250
0
250
nA
Pgood Pull-Down Resistance
VPG1, VPG2 = 0.1V
500
1200
Ω
TRK/SS1, TRK/SS2 Pull-Up Current
VTRK/SS1, VTRK/SS2 = 0V
2
µA
Channels 3 to 4
Feedback Reference Voltage
l
0.688
0.7
0.712
V
Feedback Input Current
l
–100
0
100
nA
VFB3, VFB4 Line Regulation
VVIN1 = 3V to 42V
0.01
%/V
Peak Current Limit
7
8.2
9.4
A
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN1 = VIN2 = 12V, VIN3 = VIN4 = 5V, fSW = 2MHz unless otherwise specified.



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