Datasheet

2
LT1930/LT1930A
(Note 1)
V
IN
Voltage .............................................................. 16V
SW Voltage ................................................–0.4V to 36V
FB Voltage .............................................................. 2.5V
Current Into FB Pin .............................................. ±1mA
SHDN Voltage ......................................................... 10V
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 ● 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)
ORDER PART
NUMBER
LT1930ES5
LT1930AES5
S5 PART MARKING
LTKS
LTSQ
T
JMAX
= 125°C, θ
JA
= 256°C/W
ELECTRICAL CHARACTERISTICS
PACKAGE/ORDER I FOR ATIO
UU
W
ABSOLUTE AXI U RATI GS
WWWU
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1930E/LT1930AE 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.
Note 3: Current limit guaranteed by design and/or correlation to static test.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
SW 1
GND 2
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC SOT-23
FB 3
5 V
IN
4 SHDN
LT1930 LT1930A
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Minimum Operating Voltage 2.45 2.6 2.45 2.6 V
Maximum Operating Voltage 16 16 V
Feedback Voltage 1.240 1.255 1.270 1.240 1.255 1.270 V
● 1.230 1.280 1.230 1.280 V
FB Pin Bias Current V
FB
= 1.255V ● 120 360 240 720 nA
Quiescent Current V
SHDN
= 2.4V, Not Switching 4.2 6 5.5 8 mA
Quiescent Current in Shutdown V
SHDN
= 0V, V
IN
= 3V 0.01 1 0.01 1 µA
Reference Line Regulation 2.6V ≤ V
IN
≤ 16V 0.01 0.05 0.01 0.05 %/V
Switching Frequency 1 1.2 1.4 1.8 2.2 2.6 MHz
● 0.85 1.6 1.6 2.9 MHz
Maximum Duty Cycle ● 84 90 75 90 %
Switch Current Limit (Note 3) 1 1.2 2 1 1.2 2.5 A
Switch V
CESAT
I
SW
= 1A 400 600 400 600 mV
Switch Leakage Current V
SW
= 5V 0.01 1 0.01 1 µA
SHDN Input Voltage High 2.4 2.4 V
SHDN Input Voltage Low 0.5 0.5 V
SHDN Pin Bias Current V
SHDN
= 3V 16 32 35 70 µA
V
SHDN
= 0V 0 0.1 0 0.1 µA