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| LT1110 Datasheet, PDF (2/16 Pages) Linear Technology – Micropower DC-DC Converter Adjustable and Fixed 5V, 12V | |||
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LT1110
ABSOLUTE AXI U RATI GS
Supply Voltage, Step-Up Mode ................................ 15V
Supply Voltage, Step-Down Mode ........................... 36V
SW1 Pin Voltage ...................................................... 50V
SW2 Pin Voltage ......................................... â 0.5V to VIN
Feedback Pin Voltage (LT1110) .............................. 5.5V
Switch Current ........................................................ 1.5A
Maximum Power Dissipation ............................. 500mW
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range .................. â65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ILIM 1
VIN 2
SW1 3
SW2 4
8 FB (SENSE)*
7 SET
6 A0
5 GND
N8 PACKAGE
8-LEAD PLASTIC DIP
*FIXED VERSIONS
TJMAX = 90°C, θJA = 130°C/W
ORDER PART
NUMBER
LT1110CN8
LT1110CN8-5
LT1110CN8-12
ILIM 1
VIN 2
SW1 3
SW2 4
TOP VIEW
LT1110CS8
8 FB (SENSE)* LT1110CS8-5
7 SET
LT1110CS8-12
6 A0
5 GND
S8 PART MARKING
S8 PACKAGE
8-LEAD PLASTIC SOIC
*FIXED VERSIONS
TJMAX = 90°C, θJA = 150°C/W
1110
11105
11012
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS TA = 25°C, VIN = 1.5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
IQ
Quiescent Current
VIN
Input Voltage
Switch Off
Step-Up Mode
q
300
q
1.15
12.6
1.0
12.6
Step-Down Mode
q
30
Comparator Trip Point Voltage
LT1110 (Note 1)
q
210
220
230
VOUT
Output Sense Voltage
LT1110-5 (Note 2)
LT1110-12 (Note 2)
q
4.75
5.00
5.25
q
11.4
12.00
12.6
Comparator Hysteresis
LT1110
q
4
8
Output Hysteresis
LT1110-5
q
90
180
LT1110-12
q
200
400
fOSC
Oscillator Frequency
q
52
70
90
DC
Duty Cycle
Full Load (VFB < VREF)
q
62
69
78
tON
Switch ON Time
q
7.5
10
12.5
IFB
Feedback Pin Bias Current
LT1110, VFB = 0V
q
70
150
ISET
Set Pin Bias Current
VSET = VREF
q
100
300
VAO
AO Output Low
IAO = â300µA, VSET = 150mV
q
0.15
0.4
Reference Line Regulation
1.0V ⤠VIN ⤠1.5V
q
0.35
1.0
1.5V ⤠VIN ⤠12V
q
0.05
0.1
UNITS
µA
V
V
V
mV
V
V
mV
mV
mV
kHz
%
µs
nA
nA
V
%/V
%/V
2
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