LT1935
ABSOLUTE AXI U RATI GS
(Note 1)
VIN Voltage .............................................................. 16V
SW Voltage ................................................– 0.4V to 40V
FB Voltage ................................................................. 6V
Current Into FB Pin .............................................. ±1mA
SHDN Voltage ......................................................... 16V
Maximum Junction Temperature ......................... 125°C
Operating Ambient Temperature Range
(Note 2) .............................................. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Strict adherence to JDEC 020B solder attach and rework
for assemblies containing lead is recommended.
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SW 1
GND 2
FB 3
5 VIN
4 SHDN
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TJMAX = 125°C, θJA = 113°C/ W,
ORDER PART
NUMBER
LT1935ES5
S5 PART MARKING
LTRX
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 TA = 25°C.
VIN = 3V, VSHDN = VIN unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX
Feedback Voltage
Measured at the FB Pin
● 1.240 1.265 1.280
Feedback Voltage Line Regulation
FB Pin Bias Current
Undervoltage Lockout Threshold
2.5V ≤ VIN ≤ 16V
VFB = VREF
0.01
●
12
60
2.1
2.3
Maximum Input Voltage
16
Switching Frequency
1
1.2
1.4
Maximum Duty Cycle
● 85
93
Switch Current Limit
(Note 3)
2
3.2
Switch Saturating Voltage
Switch Leakage Current
SHDN Pin Input Current
Operating Supply Current
SHDN Supply Current
SHDN Input High Voltage
ISW = 2A
VSW = 5V
VSHDN = 1.8V
VSHDN = 0V
VFB = 1.5V
VSHDN = 0V
180 280
●
0.01
1
14
40
0.1
3
0.1
1
1.8
SHDN Input Low Voltage
0.5
UNITS
V
%/V
nA
V
V
MHz
%
A
mV
µA
µA
µA
mA
µA
V
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1935ES5 is 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.
1935f
2