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LT3694 Datasheet(PDF) 3 Page - Linear Technology

Part # LT3694
Description  36V, 2.6A Monolithic Buck Regulator With Dual LDO
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3694 Datasheet(HTML) 3 Page - Linear Technology

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LT3694/LT3694-1
3
36941fa
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN Internal Undervoltage Lockout
l
3.5
3.8
4
V
Overvoltage Shutdown Threshold
l
36
38
40
V
Input Quiescent Current
Not Switching
1
2
mA
Bias Quiescent Current
Not Switching
2
3.5
mA
Shutdown Current
VEN/UVLO = 0.1V
0.1
2
μA
EN/UVLO Threshold, Bias On
350
500
mV
EN/UVLO Threshold, Switching On
l
1.16
1.2
1.23
V
Reference Voltage Line Regulation
5V < VIN < 36V
0.01
%/V
Switching Frequency
RT = 40.2K
l
0.9
1.0
1.1
MHz
VIH, SYNC
l
1.5
V
VIL, SYNC
l
0.35
V
VOH, CLKOUT
ICLKOUT = –50μA
l
1.6
2.6
V
VOL, CLKOUT
ICLKOUT = 50μA
l
0.3
V
PGOOD Output Voltage Low
IPGOOD = 250μA
0.2
0.4
V
PGOOD Leakage
VPGOOD = 2V
10
1000
nA
PGOOD Threshold (Relative to VFB)
(Note 8)
86
90
94
%
Switching Regulator
Feedback Pin Voltage
l
735
750
765
mV
Feedback Pin Bias Current
l
–50
–500
nA
Error Amplifier Transconductance
350
μS
Error Amplifier Voltage Gain
600
V/V
TRK/SS Pull-Up Current
–2
–3
–4
μA
TRK/SS Threshold to Start Switching
35
50
70
mV
VC1 Source Current
VC = 0.6V
–20
μA
VC1 Sink Current
VC = 0.6V
28
μA
VC1 Clamp Voltage
2V
VC1 Switching Threshold
0.75
V
VC1 to Switch Current Gain
3.6
A/V
Switch Leakage Current
VIN = 36V
0.01
10
μA
Minimum Boost Voltage Above Switch
(Note 4)
1.8
2.5
V
Switch Current Limit (Note 3)
(Note 3) 10% Duty Cycle
l
3.5
4.9
6
A
Switch VCESAT
ISW1 = 3A
600
mV
BST Operating Current
ISW1 = 3A
60
mA
VF, BST Diode
IBST = 100mA
0.8
V
IL BST Diode
VBST – VBIAS = 36V
1
μA
DA Current Limit
l
2.6
3.6
4.5
A
Minimum Switch Off-Time
l
140
ns
The
l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, VBIAS = 3V, unless otherwise noted. (Notes 2, 9)



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