LT1931/LT1931A
W W
U W
U W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
VIN 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
TOP VIEW
SW 1
GND 2
NFB 3
5 V
IN
4 SHDN
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 150°C/ W
S5 PART MARKING
ORDER PART NUMBER
LT1931ES5
LT1931AES5
LT1931IS5
LT1931AIS5
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: http://www.linear.com/leadfree/
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 = 25°C.
A
V
IN
= 3V, V
= V , unless otherwise noted. (Note 2)
SHDN
IN
LT1931
TYP
LT1931A
TYP
PARAMETER
CONDITIONS
MIN
MAX
2.6
MIN
MAX
2.6
UNITS
Minimum Operating Voltage
Maximum Operating Voltage
Feedback Voltage
2.45
2.45
V
V
16
16
–1.275 –1.255 –1.235 –1.275 –1.255 –1.235
V
V
●
●
–1.280
–1.230 –1.280
–1.230
NFB Pin Bias Current
V
V
V
= –1.255V
4
8
6
8
16
8
µA
mA
µA
NFB
Quiescent Current
= 2.4V, Not Switching
4.2
5.8
SHDN
SHDN
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency
= 0V, V = 3V
0.01
0.01
1.2
1
0.01
0.01
2.2
1
IN
2.6V ≤ V ≤ 16V
0.05
0.05
%/V
IN
1
0.85
1.4
1.6
1.8
1.6
2.6
2.9
MHz
MHz
●
●
Maximum Duty Cycle
Switch Current Limit
84
1
90
1.2
75
1
82
1.2
%
A
(Note 3)
2
600
1
2.5
600
1
Switch V
I
= 1A
= 5V
400
0.01
400
0.01
mV
µA
V
CESAT
SW
Switch Leakage Current
SHDN Input Voltage, High
SHDN Input Voltage, Low
SHDN Pin Bias Current
V
SW
2.4
2.4
0.5
0.5
V
V
SHDN
V
SHDN
= 3V
= 0V
16
0
32
0.1
35
0
70
0.1
µA
µA
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
Linear [ Linear ]
