LT3681
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
PG
BIAS
FB
GND
V
C
R
T
GND
1
2
3
4
5
6
7
16
15
14 RUN/SS
13 V
IN
12 SW
11 BOOST
10 BD
9 DC
8 DA
V
IN
, RUN/SS Voltage .................................................36V
BOOST Pin Voltage ...................................................56V
BOOST Pin Above SW Pin.........................................30V
FB, RT, V
C
Voltage .......................................................5V
BIAS, PG, BD Voltage ................................................30V
Maximum Junction Temperature .......................... 125°C
DC above DA .............................................................40V
Operating Temperature Range (Note 2)
LT3681E............................................... –40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
DE14MA PACKAGE
14-LEAD (4mm
´
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB
EXPOSED PAD PIN 16 IS DC
ORDER PART NUMBER
LT3681EDE
DE PART MARKING
3681
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Quiescent Current from V
IN
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUNS/SS
= 10V, V
BOOST
= 15V, V
BIAS
= 3.3V unless otherwise
noted. (Note 2)
CONDITIONS
●
MIN
TYP
3
0.01
22
75
0.01
MAX
3.6
0.5
60
120
0.5
120
5
3
1.29
1.3
100
0.02
UNITS
V
μA
μA
μA
μA
μA
μA
V
V
V
nA
%/V
μMho
μA
μA
A/V
V
V
RUN/SS
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0, Not Switching
●
Quiescent Current from BIAS
V
RUN/SS
= 0.2V
V
BIAS
= 3V, Not Switching
V
BIAS
= 0, Not Switching
●
50
0
2.7
1.25
1.24
1.265
1.265
30
0.002
330
800
65
85
3.5
2
Minimum Bias Voltage
Feedback Voltage
●
FB Pin Bias Current (Note 3)
FB Voltage Line Regulation
Error Amp GM
Error Amp Gain
V
C
Source Current
V
C
Sink Current
V
C
Pin to Switch Current Gain
V
C
Clamp Voltage
V
FB
= 1.25V, V
C
= 0.4V
4V < V
IN
< 34V
●
3681f
2
U
W
U
U
W W
W
LINER [ LINEAR TECHNOLOGY ]
