lt3681 Linear Technology Corporation, lt3681 Datasheet - Page 2

• Manufacturer Part Number: lt3681
• Description: 36v, 2a, 2.8mhz Step-down Switching Regulator With Integrated Power Schottky Diode
• Manufacturer: Linear Technology Corporation

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