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LT8613 Datasheet(PDF) 3 Page - Analog Devices

Part # LT8613
Description  65V, 8A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current
PDF  30 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT8613 Datasheet(HTML) 3 Page - Analog Devices

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LT8645S-2
3
Rev. A
For more information www.analog.com
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
l
3.0
3.4
V
VIN Quiescent Current in Shutdown
VEN/UV = 0V
l
0.9
0.9
3
20
µA
µA
VIN Quiescent Current in Sleep
VEN/UV = 2V, VFB > 0.97V, VSYNC = 0V
l
1.7
1.7
4
20
µA
µA
VIN Current in Regulation
VOUT = 0.97V, VIN = 6V, ILOAD = 1mA, VSYNC = 0V
l
200
500
µA
Feedback Reference Voltage
VIN = 6V
VIN = 6V
l
0.964
0.956
0.970
0.970
0.976
0.982
V
V
Feedback Voltage Line Regulation
VIN = 4.0V to 42V
l
0.004
0.025
%/V
Feedback Pin Input Current
VFB = 1V
–20
20
nA
BIAS Pin Current Consumption
VBIAS = 3.3V, fSW = 2MHz
22
mA
Minimum On-Time
ILOAD = 2.5A, SYNC = 0V
ILOAD = 2.5A, SYNC = 2V
l
l
40
35
65
60
ns
ns
Minimum Off-Time
80
110
ns
Oscillator Frequency
RT = 221k
RT = 60.4k
RT = 18.2k
l
l
l
180
665
1.8
210
700
1.95
240
735
2.1
kHz
kHz
MHz
Top Power NMOS On-Resistance
ISW = 1A
36
mΩ
Top Power NMOS Current Limit
l
10.5
14
17.5
A
Bottom Power NMOS On-Resistance
VINTVCC = 3.4V, ISW = 1A
25
mΩ
Bottom Power NMOS Current Limit
VINTVCC = 3.4V
8.5
11
14
A
SW Leakage Current
VIN = 42V, VSW = 0V, 42V
–1.5
1.5
µA
EN/UV Pin Threshold
EN/UV Rising
l
0.95
1.01
1.07
V
EN/UV Pin Hysteresis
45
mV
EN/UV Pin Current
VEN/UV = 2V
–20
20
nA
PG Upper Threshold Offset from VFB
VFB Falling
l
5
7.5
10
%
PG Lower Threshold Offset from VFB
VFB Rising
l
–10.5
–8
–5.5
%
PG Hysteresis
0.4
%
PG Leakage
VPG = 3.3V
–40
40
nA
PG Pull-Down Resistance
VPG = 0.1V
l
750
2000
Ω
SYNC/MODE Threshold
SYNC/MODE DC and Clock Low Level Voltage
SYNC/MODE Clock High Level Voltage
SYNC/MODE DC High Level Voltage
l
l
l
0.7
2.2
0.9
1.2
2.55
1.4
2.9
V
V
V
Spread Spectrum Modulation
Frequency Range
RT = 60.4k, VSYNC = 3.3V
24
%
Spread Spectrum Modulation Frequency
VSYNC = 3.3V
2.5
kHz
TR/SS Source Current
l
1.2
2
2.8
µA
TR/SS Pull-Down Resistance
Fault Condition, TR/SS = 0.1V
220
Ω



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