LT3972
2
3972fa
ELECTRICAL CHARACTERISTICS
V
IN
, RUN/SS Voltage (Note 5) ...................................62V
BOOST Pin Voltage ...................................................56V
BOOST Pin Above SW Pin .........................................30V
FB, RT, V
C
Voltage .......................................................5V
PG, BD, SYNC Voltage ..............................................30V
(Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage
●
3 3.6 V
V
IN
Overvoltage Lockout
●
33 35 37 V
Quiescent Current from V
IN
V
RUN/SS
= 0.2V 0.01 0.5 μA
V
BD
= 3V, Not Switching
●
30 65 μA
V
BD
= 0, Not Switching 120 160 μA
The ● denotes the 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
BOOST
= 15V, V
BD
= 3.3V unless otherwise
noted. (Note 2)
Operating Junction Temperature Range (Note 2)
LT3972E .............................................–40°C to 125°C
LT3972I ..............................................–40°C to 125°C
LT3972H ............................................– 40°C to 150°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
(MSE Only) ....................................................... 300°C
TOP VIEW
DD PACKAGE
10-LEAD (3mm s 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
11
2
1
RT
V
C
FB
PG
SYNC
BD
BOOST
SW
V
IN
RUN/SS
θ
JA
= 45°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
BD
BOOST
SW
V
IN
RUN/SS
10
9
8
7
6
RT
V
C
FB
PG
SYNC
TOP VIEW
MSE PACKAGE
10-LEAD PLASTIC MSOP
11
θ
JA
= 45°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3972EDD#PBF LT3972EDD#TRPBF LDXR
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3972IDD#PBF LT3972IDD#TRPBF LDXR
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3972EMSE#PBF LT3972EMSE#TRPBF LTDXS 10-Lead Plastic MSOP –40°C to 125°C
LT3972IMSE#PBF LT3972IMSE#TRPBF LTDXS 10-Lead Plastic MSOP –40°C to 125°C
LT3972HMSE#PBF LT3972HMSE#TRPBF LTDXS 10-Lead Plastic MSOP –40°C to 150°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 L
TC 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/
ABSOLUTE MAXIMUM RATINGS