Datasheet

LT1110
2
WU
U
PACKAGE
/
O
RDER I FOR ATIO
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
Supply Voltage, Step-Up Mode................................ 15V
Supply Voltage, Step-Down Mode ........................... 36V
SW1 Pin Voltage...................................................... 50V
SW2 Pin Voltage.........................................–0.5V to V
IN
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 ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
ORDER PART
NUMBER
LT1110CN8
LT1110CN8-5
LT1110CN8-12
1110
11105
11012
Consult factory for Industrial and Military grade parts.
T
JMAX
= 90°C, θ
JA
= 150°C/W
1
2
3
4
8
7
6
5

TOP VIEW
I
LIM

V
IN

SW1
SW2
FB (SENSE)*
SET
A0
GND
N8 PACKAGE
8-LEAD PLASTIC DIP
*FIXED VERSIONS
T
JMAX
= 90°C, θ
JA
= 130°C/W
1
2
3
4
8
7
6
5
TOP VIEW
FB (SENSE)*
SET
A0
GND
I
LIM

V
IN

SW1
SW2
S8 PACKAGE
8-LEAD PLASTIC SOIC
*FIXED VERSIONS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
Q
Quiescent Current Switch Off ● 300 µA
V
IN
Input Voltage Step-Up Mode ● 1.15 12.6 V
1.0 12.6 V
Step-Down Mode ● 30 V
Comparator Trip Point Voltage LT1110 (Note 1) ● 210 220 230 mV
V
OUT
Output Sense Voltage LT1110-5 (Note 2) ● 4.75 5.00 5.25 V
LT1110-12 (Note 2) ● 11.4 12.00 12.6 V
Comparator Hysteresis LT1110 ● 48 mV
Output Hysteresis LT1110-5 ● 90 180 mV
LT1110-12 ● 200 400 mV
f
OSC
Oscillator Frequency ● 52 70 90 kHz
DC Duty Cycle Full Load (V
FB
< V
REF
) ● 62 69 78 %
t
ON
Switch ON Time ● 7.5 10 12.5 µs
I
FB
Feedback Pin Bias Current LT1110, V
FB
= 0V ● 70 150 nA
I
SET
Set Pin Bias Current V
SET
= V
REF
● 100 300 nA
V
AO
AO Output Low I
AO
= –300µA, V
SET
= 150mV ● 0.15 0.4 V
Reference Line Regulation 1.0V ≤ V
IN
≤ 1.5V ● 0.35 1.0 %/V
1.5V ≤ V
IN
≤ 12V ● 0.05 0.1 %/V
E
LECTR
IC
AL C CHARA TERIST
ICS
T
A
= 25°C, V
IN
= 1.5V, unless otherwise noted.
S8 PART MARKING
LT1110CS8
LT1110CS8-5
LT1110CS8-12