LT3680IDD View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3680IDD
Linear Technology
LT3680IDD Datasheet PDF : 24 Pages
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LT3680
ELECTRICAL CHARACTERISTICS The ā denotes the speciļ¬cations which apply over the full operating
temperature range, otherwise speciļ¬cations are at TA = 25Ā°C. VIN = 10V, VRUN/SS = 10V VBOOST = 15V, VBD = 3.3V unless otherwise
noted. (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Input Voltage
ā
3
3.6
V
Quiescent Current from VIN
Quiescent Current from BD
Minimum Bias Voltage (BD Pin)
VRUN/SS = 0.2V
VBD = 3V, Not Switching
VBD = 0, Not Switching
VRUN/SS = 0.2V
VBD = 3V, Not Switching
VBD = 0, Not Switching
0.01 0.5
Ī¼A
ā
30
65
Ī¼A
120 160
Ī¼A
0.01 0.5
Ī¼A
ā
90
130
Ī¼A
1
5
Ī¼A
2.7
3
V
Feedback Voltage
780
790
800
mV
ā 775
790
805
mV
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
Error Amp gm
Error Amp Gain
VFB = 0.8V, VC = 0.4V
4V < VIN < 36V
ā
10
40
nA
0.002 0.01
%/V
500
Ī¼Mho
2000
VC Source Current
VC Sink Current
VC Pin to Switch Current Gain
VC Clamp Voltage
Switching Frequency
Minimum Switch Off-Time
RT = 8.66k
RT = 29.4k
RT = 187k
60
Ī¼A
60
Ī¼A
5.3
A/V
2.0
V
2.2
2.45
2.7
MHz
1.0
1.1 1.25
MHz
200
230
260
kHz
ā
60
150
nS
Switch Current Limit
Duty Cycle = 5%
4.6
5.4
6.0
A
Switch VCESAT
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
ISW = 3.5A
VBOOST = 10V, VBD = 0V
335
mV
0.02
2
Ī¼A
ā
1.5
2.0
V
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
ISW = 1A
VRUN/SS = 2.5V
35
50
mA
5
8
Ī¼A
2.5
V
RUN/SS Input Voltage Low
0.2
V
PG Threshold Offset from Feedback Voltage
PG Hysteresis
VFB Rising
65
mV
10
mV
PG Leakage
PG Sink Current
SYNC Low Threshold
VPG = 5V
VPG = 0.4V
0.1
1
Ī¼A
ā 200
800
Ī¼A
0.5
V
SYNC High Threshold
0.7
V
SYNC Pin Bias Current
VSYNC = 0V
0.1
Ī¼A
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
guaranteed over the ā40Ā°C to 125Ā°C temperature range. The LT3680H
speciļ¬cations are guaranteed over the ā40Ā°C to 150Ā°C operating
temerature range. High junction temperatures degrade operating lifetimes.
Operating lifetime is derated at junction temperatures greater than 125Ā°C.
Note 2: The LT3680E is guaranteed to meet performance speciļ¬cations
from 0Ā°C to 125Ā°C. Speciļ¬cations over the ā40Ā°C to 125Ā°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3680I speciļ¬cations are
Note 3: Bias current ļ¬ows out of the FB pin.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
3680fb
3
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