LT1931 Linear Technology, LT1931 Datasheet - Page 2

• Manufacturer Part Number: LT1931
• Description: 1.2MHz/2.2MHz Inverting DC/DC Converters in ThinSOT
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
ELECTRICAL CHARACTERISTICS
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
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
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
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
IN
U
= 3V
PACKAGE/ORDER I FOR ATIO
Consult factory for parts specified with wider operating temperature ranges.
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: Current limit guaranteed by design and/or correlation to static test.
GND 2
NFB 3
SW 1
T
– 1.275 – 1.255 – 1.235
– 1.280
JMAX
5-LEAD PLASTIC SOT-23
MIN
0.85
2.4
84
1
1
= 125 C,
S5 PACKAGE
TOP VIEW
LT1931
2.45
0.01
0.01
0.01
TYP
400
4.2
1.2
1.2
90
16
4
0
JA
= 256 C/ W
– 1.230
MAX
0.05
600
2.6
1.4
1.6
0.5
0.1
16
32
5 V
4 SHDN
8
6
1
2
1
IN
–1.275 –1.255 –1.235
–1.280
MIN
1.8
1.6
2.4
U
75
1
S5 PART MARKING
LT1931A
2.45
0.01
0.01
0.01
TYP
400
5.8
2.2
1.2
82
35
8
0
ORDER PART
LT1931ES5
LT1931AES5
A
W
= 25 C.
NUMBER
LTRA
LTSP
–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
MHz
MHz
%/V
mA
mV
%
V
V
V
V
A
A
A
A
V
V
A
A