LT3470
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SHDN 1
NC 2
V
IN
3
GND 4
8 FB
7 BIAS
6 BOOST
5 SW
V
IN
, SHDN Voltage .................................................. 40V
BOOST Pin Voltage ................................................. 47V
BOOST Pin Above SW Pin ...................................... 25V
FB Voltage ................................................................ 5V
BIAS Voltage ............................................................ 25V
SW Voltage ................................................................V
IN
Maximum Junction Temperature ......................... 125擄C
Operating Temperature Range (Note 2) .. 鈥?40擄C to 85擄C
Storage Temperature Range ................. 鈥?65擄C to 150擄C
Lead Temperature (Soldering, 10 sec).................. 300擄C
ORDER PART
NUMBER
LT3470ETS8
LT3470ITS8
TS8 PART MARKING
LTBDM
LTBPW
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
T
JMAX
= 125擄C,
胃
JA
= 140擄C/ W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The
鈼?/div>
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25擄C.
V
IN
= 10V, V
SHDN
= 10V, V
BOOST
= 15V, V
BIAS
= 3V unless otherwise specified.
PARAMETER
Minimum Input Voltage
Quiescent Current from V
IN
V
SHDN
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
V
SHDN
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0V, Not Switching
V
FB
Falling
V
FB
= 1V
鈼?/div>
CONDITIONS
鈼?/div>
鈼?/div>
MIN
TYP
0.1
10
35
0.1
25
0.1
MAX
4
0.5
18
50
0.5
60
1.5
1.265
80
150
0.01
1.5
300
435
UNITS
V
碌A(chǔ)
碌A(chǔ)
碌A(chǔ)
碌A(chǔ)
碌A(chǔ)
碌A(chǔ)
V
nA
nA
%/V
ns
碌A(chǔ)
mV
mA
mA
Quiescent Current from Bias
鈼?/div>
鈼?/div>
FB Comparator Trip Voltage
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
Minimum Switch Off-Time (Note 5)
Switch Leakage Current
Switch V
CESAT
Switch Top Current Limit
Switch Bottom Current Limit
1.228
1.250
35
35
0.0006
500
0.7
4V < V
IN
< 40V
I
SW
= 100mA
V
FB
= 0V
V
FB
= 0V
250
215
325
225
2
U
3470f
W
U
U
W W
W
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