Datasheet

LTC1871-1
2
18711fb
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
V
IN
Voltage ............................................... – 0.3V to 36V
INTV
CC
Voltage ............................................ –0.3V to 7V
INTV
CC
Output Current .......................................... 50mA
GATE Voltage ............................ –0.3V to V
INTVCC
+ 0.3V
I
TH
, FB Voltages ....................................... –0.3V to 2.7V
RUN, MODE/SYNC Voltages ....................... –0.3V to 7V
FREQ Voltage ............................................ –0.3V to 1.5V
SENSE Pin Voltage .................................... –0.3V to 36V
Operating Junction Temperature Range (Note 2)
LTC1871E-1 ......................................... –40°C to 85°C
LTC1871I-1 ........................................ –40°C to 125°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
1
2
3
4
5
RUN
I
TH
FB
FREQ
MODE/
SYNC
10
9
8
7
6
SENSE
V
IN
INTV
CC
GATE
GND
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 120°C/W
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1871EMS-1#PBF LTC1871EMS-1#TRPBF LTCTV 10-Lead Plastic MSOP –40°C to 85°C
LTC1871IMS-1#PBF LTC1871IMS-1#TRPBF LTCTV 10-Lead Plastic MSOP –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1871EMS-1 LTC1871EMS-1#TR LTCTV 10-Lead Plastic MSOP –40°C to 85°C
LTC1871IMS-1 LTC1871IMS-1#TR LTCTV 10-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
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/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
V
IN(MIN)
Minimum Input Voltage 2.5 V
I-Grade (Note 2)
●
2.5 V
I
Q
Input Voltage Supply Current (Note 4)
Continuous Mode V
MODE/SYNC
= 5V, V
FB
= 1.4V, V
ITH
= 0.75V 550 1000 µA
V
MODE/SYNC
= 5V, V
FB
= 1.4V, V
ITH
= 0.75V,
I-Grade (Note 2)
●
550 1000 µA
Burst Mode Operation, No Load V
MODE/SYNC
= 0V, V
ITH
= 0V (Note 5) 250 500 µA
V
MODE/SYNC
= 0V, V
ITH
= 0V (Note 5),
I-Grade (Note 2)
●
250 500 µA
Shutdown Mode V
RUN
= 0V 10 20 µA
V
RUN
= 0V, I-Grade (Note 2)
●
10 20 µA
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 5V, V
RUN
= 1.5V, R
FREQ
= 80k, V
MODE/SYNC
= 0V, unless otherwise specifi ed.