LT1931/LT1931A
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SW 1
GND 2
NFB 3
4 SHDN
5 V
IN
V
IN
Voltage .............................................................. 16V
SW Voltage ................................................– 0.4V to 36V
NFB Voltage ............................................................. – 2V
Current Into NFB Pin ............................................
±1mA
SHDN Voltage .......................................................... 16V
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C,
θ
JA
= 150°C/ W
ORDER PART NUMBER
LT1931ES5
LT1931AES5
LT1931IS5
LT1931AIS5
S5 PART MARKING
LTRA
LTSP
LTBZF
LTBZG
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
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
V
IN
= 3V, V
SHDN
= V
IN
, unless otherwise noted. (Note 2)
PARAMETER
Minimum Operating Voltage
Maximum Operating Voltage
Feedback Voltage
●
CONDITIONS
MIN
LT1931
TYP
2.45
MAX
2.6
16
LT1931A
MIN
TYP
MAX
2.45
2.6
16
–1.275 –1.255 –1.235
–1.280
–1.230
8
5.8
0.01
0.01
1.8
1.6
75
1
2.2
82
1.2
400
0.01
2.4
2.5
600
1
0.5
35
0
70
0.1
16
8
1
0.05
2.6
2.9
UNITS
V
V
V
V
µA
mA
µA
%/V
MHz
MHz
%
A
mV
µA
V
V
µA
µA
– 1.275 – 1.255 – 1.235
– 1.280
– 1.230
4
4.2
0.01
0.01
1
0.85
84
1
1.2
90
1.2
400
0.01
2.4
0.5
2
600
1
8
6
1
0.05
1.4
1.6
NFB Pin Bias Current
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency
V
NFB
= –1.255V
V
SHDN
= 2.4V, Not Switching
V
SHDN
= 0V, V
IN
= 3V
2.6V
≤
V
IN
≤
16V
●
●
Maximum Duty Cycle
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
SHDN Input Voltage, High
SHDN Input Voltage, Low
SHDN Pin Bias Current
V
SHDN
= 3V
V
SHDN
= 0V
(Note 3)
I
SW
= 1A
V
SW
= 5V
●
16
0
32
0.1
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LT1931E/LT1931AE are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the – 40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls. LT1931I/LT1931AI are
guaranteed over the –40°C to 85°C temperature range.
Note 3:
Current limit guaranteed by design and/or correlation to static test.
1931fa
2
U
W
U
U
W W
W
LINER [ LINEAR TECHNOLOGY ]
