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LT8610AB Datasheet(PDF) 3 Page - Analog Devices

Part # LT8610AB
Description  42V, 10A/12A Peak Synchronous Step-Down Silent Switcher 2
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT8610AB Datasheet(HTML) 3 Page - Analog Devices

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LT8638S
3
Rev. 0
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
fSW = 2MHz
l
2.6
2.8
V
VIN Quiescent Current in Shutdown
VEN/UV = 0V, VIN = 12V
6
9
µA
VIN Quiescent Current in Sleep
VEN/UV = 2V, VFB > 0.6V, VSYNC = 0V, VBIAS = 0V
l
125
125
195
245
µA
µA
VEN/UV = 2V, VFB > 0.6V, VSYNC = 0V, VBIAS = 5V
20
29
µA
BIAS Quiescent Current in Sleep
VEN/UV = 2V, VFB > 0.6V, VSYNC = 0V, VBIAS = 5V
100
145
µA
Feedback Reference Voltage
VIN = 12V
VIN = 12V
l
0.598
0.594
0.6
0.6
0.602
0.604
V
V
Feedback Voltage Line Regulation
VIN = 4.0V to 40V, VCC = 1.25V
l
0.004
0.03
%/V
Feedback Pin Input Current
VFB = 0.6V
–20
20
nA
Error Amp Transconductance
VC = 1.25V
1.05
1.4
1.75
mS
Error Amp Gain
700
VC Source Current
VFB = 0.4V, VC = 1.25V
320
µA
VC Sink Current
VFB = 0.8V, VC = 1.25V
320
µA
VC Pin to Switch Current Gain
12
A/V
VC Clamp Voltage
2.3
V
BIAS Pin Current Consumption
VBIAS = 3.3V, fSW = 2MHz, VIN = 12V
45
mA
Minimum On-Time
ILOAD = 3A, FCM
l
25
40
ns
Minimum Off-Time
80
100
ns
Oscillator Frequency
RT = 226k
RT = 38.3k
RT = 16.9k
l
l
l
170
0.96
1.85
200
1
2
230
1.04
2.15
kHz
MHz
MHz
Top Power NMOS On-Resistance
ISW = 1A
20
mΩ
Top Power NMOS Current Limit
l
17
20
23
A
Bottom Power NMOS On-Resistance
VINTVCC = 3.4V, ISW = 1A
8
mΩ
Bottom Power NMOS Current Limit
VINTVCC = 3.4V
12
15.5
19
A
SW Leakage Current
VIN = 42V, VSW = 0V, 42V
–1.5
1.5
µA
EN/UV Pin Threshold
EN/UV Rising
l
0.93
0.98
1.03
V
EN/UV Pin Hysteresis
40
mV
EN/UV Pin Current
VEN/UV = 2V
–20
20
nA
PG Upper Threshold Offset from VFB
VFB Rising
l
6
7.75
9.5
%
PG Lower Threshold Offset from VFB
VFB Falling
l
–9.5
–7.75
–6
%
PG Hysteresis
0.4
%
PG Leakage
VPG = 3.3V
–80
80
nA
PG Pull-Down Resistance
VPG = 0.1V
l
600
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
1.5
2.9
V
V
V
Spread Spectrum Modulation Frequency Range RT = 38.3k
24
%



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