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LT1932
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
V IN Voltage ............................................................. 10V
SHDN Voltage ......................................................... 10V
TOP VIEW
ORDER PART
NUMBER
SW Voltage ............................................................. 36V
LED Voltage ............................................................. 36V
SW 1
GND 2
6 V IN
5 SHDN
LT1932ES6
R SET Voltage ............................................................. 1V
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
LED 3 4 R SET
S6 PACKAGE
6-LEAD PLASTIC SOT-23
T JMAX = 125 ° C, θ JA = 250 ° C/ W
S6 PART MARKING
LTST
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T A = 25 ° C. V IN = 1.2V, V SHDN = 1.2V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
1
V
Quiescent Current
R SET Pin Voltage
LED Pin Voltage
V RSET = 0.2V
V SHDN = 0V
R SET = 1.50k
R SET = 1.50k, V IN < V OUT (Figure 1)
1.2
0.1
100
120
1.6
1.0
180
mA
μ A
mV
mV
LED Pin Current
R SET = 562 ? , V IN = 1.5V
R SET = 750 ? , V IN = 1.2V
R SET = 1.50k, V IN = 1.2V
33
25
12.5
38
30
15
45
36
17.5
mA
mA
mA
R SET = 4.53k, V IN = 1.2V
5
mA
LED Pin Current Temperature Coefficient
I LED = 15mA
– 0.02
mA/ ° C
Switching Frequency
Maximum Switch Duty Cycle
V IN = 1V
q
0.8
90
1.2
95
1.6
MHz
%
Switch Current Limit
Switch V CESAT
SHDN Pin Current
I SW = 300mA
V SHDN = 0V
V SHDN = 2V
400
550
150
0
15
780
200
0.1
30
mA
mV
μ A
μ A
Start-Up Threshold (SHDN Pin)
Shutdown Threshold (SHDN Pin)
0.85
0.25
V
V
Switch Leakage Current
Switch Off, V SW = 5V
0.01
5
μ A
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2: The LT1932E is guaranteed to meet 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.
1932f
2
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