Datasheet

LT3682
2
3682f
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
V
IN
, RUN/SS Voltage (Note 2) …….……………. ....60V
BOOST Pin Voltage …………………………..……. 50V
BOOST Pin Above SW Pin …………………..…… ..30V
FB, R
T
, V
C
Voltage ......................................................5V
SYNC …………………………….………….……. 20V
BD and PG Voltage ..…….………………..……….. 30V
Operating Junction Temperature Range (Notes 3 and 6)
LT3682E ……………….………….. . −40°C to 125°C
LT3682I ……………………………. −40°C to 125°C
Storage Temperature Range ………….. −65°C to 150°C
(Note 1)
TOP VIEW
DD PACKAGE
12-LEAD (3mm s 3mm) PLASTIC DFN
12
11
8
9
10
4
5
3
2
1
V
IN
SYNC
R
T
RUN/SS
SW
DA
V
C
FB
PG
GND
BD
BOOST
6
7
13
θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3682EDD#PBF LT3682EDD#TRPBF LFDW
12-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3682IDD#PBF LT3682IDD#TRPBF LFDW
12-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage V
BD
= 3.3V
V
BD
< 3.0V
l
l
3.4
3.4
3.6
4.3
V
V
V
IN
Overvoltage Lockout
l
36 39 41 V
Quiescent Current from V
IN
V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
l
0.01
35
90
0.5
60
160
µA
µA
µA
Quiescent Current from BD Pin V
RUN/SS
= 0.2V
V
RUN/SS
= 10V, V
BD
= 3.3V, Not Switching
V
RUN/SS
= 10V, V
BD
= 0V, Not Switching
l
0.01
55
0
0.5
100
5
µA
µA
µA
Minimum BD Pin Voltage 2.8 3 V
Feedback Voltage
l
792
780
800
800
808
812
mV
mV
FB Pin Bias Current (Note 4) FB Pin Voltage = 800mV
l
580 nA
FB Voltage Line Regulation 3.6V < V
IN
< 36V 0.001 0.005 %/V
Error Amp g
m
I
VC
= ±1.5µA
430 S
Error Amp Voltage Gain 1300 V/V
The l denotes specifi cations which apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C, V
IN
= 10V, V
RUN
/SS = 10V, V
BD
= 3.3V unless otherwise noted. (Note 3)