lt1931a Linear Technology Corporation, lt1931a Datasheet - Page 2

• Manufacturer Part Number: lt1931a
• Description: Lt1931a - 1.2mhz/2.2mhz Inverting Dc/dc Converters In Thinsot
• Manufacturer: Linear Technology Corporation

ABSOLUTE AXI U RATI GS
LT1931/LT1931A
(Note 1)
V
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
ELECTRICAL CHARACTERISTICS
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
2
The
V
PARAMETER
Minimum Operating Voltage
Maximum Operating Voltage
Feedback Voltage
NFB Pin Bias Current
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch V
Switch Leakage Current
SHDN Input Voltage, High
SHDN Input Voltage, Low
SHDN Pin Bias Current
IN
IN
= 3V, V
Voltage .............................................................. 16V
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
CESAT
SHDN
= V
IN
W
, unless otherwise noted. (Note 2)
W W
CONDITIONS
V
V
V
2.6V ≤ V
(Note 3)
I
V
V
V
SW
NFB
SHDN
SHDN
SW
SHDN
SHDN
= 1A
= 5V
= –1.255V
= 2.4V, Not Switching
= 0V, V
= 3V
= 0V
IN
≤ 16V
U
IN
= 3V
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
ORDER PART NUMBER
●
●
●
●
LT1931ES5
LT1931AES5
LT1931IS5
LT1931AIS5
– 1.275 – 1.255 – 1.235
– 1.280
MIN
0.85
2.4
84
1
1
LT1931
2.45
0.01
0.01
0.01
TYP
400
4.2
1.2
1.2
90
16
4
0
GND 2
NFB 3
SW 1
T
http://www.linear.com/leadfree/
JMAX
5-LEAD PLASTIC TSOT-23
– 1.230
MAX
0.05
= 125°C, θ
600
2.6
1.4
1.6
0.5
0.1
16
32
8
6
1
2
1
S5 PACKAGE
TOP VIEW
JA
–1.275 –1.255 –1.235
–1.280
= 150°C/ W
MIN
U
1.8
1.6
2.4
75
1
S5 PART MARKING
5 V
4 SHDN
LT1931A
IN
TYP
2.45
0.01
0.01
0.01
400
5.8
2.2
1.2
82
35
LTRA
LTSP
LTBZF
LTBZG
8
0
A
W
= 25°C.
–1.230
MAX
0.05
600
2.6
2.6
2.9
2.5
0.5
0.1
16
16
70
8
1
1
UNITS
U
1931fa
MHz
MHz
%/V
mA
mV
µA
µA
µA
µA
µA
%
V
V
V
V
A
V
V