LT3506/LT3506A
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN(MIN)
I
INQ
I
INSD
V
FB
I
FB
V
FB(REG)
gm
EA
A
V
I
VC
V
VC(THRESH)
V
VC(CLAMP)
f
SW
PARAMETER
Undervoltage Lockout
Quiescent Current
Shutdown Current
Feedback Voltage
Not Switching
V
RUNSS
= 0V
–40°C to 85°C, EDHD
–40°C to 85°C, EFE
–40°C to 125°C, IFE, IDHD
V
FB
= 800mV, V
C
= 0.4V
V
IN
= 5V to 25V
●
●
●
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 5V, V
BOOST
= 8V, unless otherwise noted. (Note 2)
CONDITIONS
●
MIN
TYP
3.4
3.8
30
MAX
3.6
4.8
45
808
816
816
100
UNITS
V
mA
µA
mV
mV
mV
nA
%/V
uMhos
µA
µA
V
V
792
784
784
800
800
800
40
0.005
350
400
FB Pin Bias Current
Reference Line Regulation
Error Amp GM
Error Amp Voltage Gain
V
C
Source Current
V
C
Sink Current
V
C
Switching Threshold
V
C
Clamp Voltage
Switching Frequency
Switching Phase
V
FB
= 0.6V, V
C
= 0V
V
FB
= 1.2V, V
C
= 1100mV
30
30
0.7
1.9
LT3506
LT3506A
(Note 5)
LT3506
LT3506A
V
FB
= 0V
(Note 3)
I
SW
= 1A
I
SW
= 1A
I
SW
= 1A
500
1
89
78
575
1.1
180
93
88
0.4
170
650
1.2
kHz
MHz
Deg
%
%
V
kHz
DC
V
FB(SWTHRESH)
f
FOLD
I
SW
V
SW(SAT)
I
LSW
V
BOOST(MIN)
I
BOOST
I
RUN/SS
V
RUN/SS(THRESH)
V
FB(PGTHRESH)
V
PG(LOW)
I
LPG
Maximum Duty Cycle
Frequency Shift Threshold on FB
Foldback Frequency
Switch Current Limit
Switch V
CESAT
(Note 4)
Switch Leakage Current
Minimum Boost Voltage Above Switch
BOOST Pin Current
RUN/SS Current
RUN/SS Threshold
V
FB
PG Threshold
PG Voltage Output Low
PG Pin Leakage
2.0
2.6
210
3.6
10
A
mV
µA
V
mA
µA
V
mV
1.5
20
2.1
0.3
0.8
720
0.22
0.1
2.5
30
V
FB
Rising
V
FB
= 640mV, I
PG
= 250µA
V
PG
= 2V
0.4
1
V
µA
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.
Note 2:
The LT3506E/LT3506AE are guaranteed to meet performance
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls. The LT3506I/LT3506AI are
guaranteed and tested over the full –40°C to 125°C operating temperature
range.
Note 3:
Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at high duty cycle.
Note 4:
Switch V
CESAT
guaranteed by design.
Note 5:
Switching phase is guaranteed by design.
3506afb
LINER [ LINEAR TECHNOLOGY ]
