LT1109A View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LT1109A
Linear Technology
'LT1109A' PDF : 8 Pages View PDF
LT1109A
TYPICAL PERFOR A CE CHARACTERISTICS
LT1109A-12
Output Voltage
12.3
12.2
12.1
12.0
11.9
11.8
11.7
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1109A G09
Minimum/Maximum
Oscillator Frequency vs tON
160
150
0°C ≤ TA ≤ 70°C
140
130
120
TA= 25°C
110
100
90
80
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
tON (µs)
1109A G10
BLOCK DIAGRA S
LT1109A-5, LT1109A-12
VIN SENSE
1.25V
REF
R2
250k
+
COMP
A1
–
R1*
SW
120kHz
OSC
Q1
DRIVER
GND
SHUTDOWN
*LT1109A-5: R1 = 83k
LT1109A-12: R1 = 29k
PGND
LT1109A (Adjustable)
VIN
FB
SW
1.25V
REF
+
COMP
A1
–
120kHz
OSC
Q1
DRIVER
GND
SHUTDOWN
PGND
1109A BD
4
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