LT1173CS8#TR Linear Technology, LT1173CS8#TR Datasheet - Page 2

• Manufacturer Part Number: LT1173CS8#TR
• Description: IC CONV DC/DC ADJ MICROPWR 8SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Invertingr

Specifications of LT1173CS8#TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 50 V
• Current - Output: 400mA
• Frequency - Switching: 23kHz
• Voltage - Input: 2 ~ 30 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 500mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A
Supply Voltage (V
SW1 Pin Voltage (V
SW2 Pin Voltage (V
Feedback Pin Voltage (LT1173) ................................. 5V
Sense Pin Voltage (LT1173, -5, -12) ....................... 36V
Maximum Power Dissipation ............................. 500mW
Maximum Switch Current ....................................... 1.5A
Operating Temperature Range ..................... 0 C to 70 C
Storage Temperature Range .................. –65 C to 150 C
Lead Temperature, (Soldering, 10 sec.)................ 300 C
Consult factory for Industrial and Military grade parts
SYMBOL
I
I
V
V
f
t
V
V
2
LT1 173
ELECTRICAL C
Q
Q
OSC
ON
IN
OUT
OL
SAT
BSOLUTE
PARAMETER
Quiescent Current
Quiescent Current, Boost
Mode Configuration
Input Voltage
Comparator Trip Point Voltage
Output Sense Voltage
Comparator Hysteresis
Output Hysteresis
Oscillator Frequency
Duty Cycle
Switch ON Time
Feedback Pin Bias Current
Set Pin Bias Current
Gain Block Output Low
Reference Line Regulation
SW
SAT
Voltage, Step-Up Mode
IN
W
) ................................................ 36V
SW1
SW2
A
HARA TERISTICS
) .......................................... 50V
) ............................. – 0.5V to V
XI
W
U
C
W
R
A
TI
CONDITIONS
Switch Off
No Load
Step-Up Mode
Step-Down Mode
LT1173 (Note 1)
LT1173-5 (Note 2)
LT1173-12 (Note 2)
LT1173
LT1173-5
LT1173-12
Full Load
I
LT1173, V
V
I
2.0V V
5V V
V
V
LIM
SINK
SET
IN
IN
U
= 3.0V, I
= 5.0V, I
tied to V
= V
= 100 A, V
G
IN
REF
IN
FB
T
S
A
30V
SW
SW
IN
= 0V
5V
= 25 C, V
= 650mA
= 1A
IN
SET
= 1.00V
LT1173-12
LT1173-5
PACKAGE/ORDER I FOR ATIO
IN
= 3V, unless otherwise noted.
SW1
SW2
SW1
SW2
I
I
LIM
V
LIM
V
IN
IN
T
T
JMAX
8-LEAD PLASTIC SOIC
JMAX
1
2
3
4
1
2
3
4
8-LEAD PLASTIC DIP
*FIXED VERSIONS
*FIXED VERSIONS
N8 PACKAGE
= 90 C,
S8 PACKAGE
= 90 C,
TOP VIEW
TOP VIEW
MIN
2.0
1.20
4.75
11.4
18
43
17
JA
JA
= 130 C/W
= 150 C/W
8
7
6
5
8
7
6
5
FB (SENSE)*
SET
AO
GND
FB (SENSE)*
SET
AO
GND
TYP
110
135
250
1.245
5.00
12.0
5
20
50
23
51
22
10
20
0.15
0.2
0.02
0.5
0.8
U
S8 PART MARKING
LT1173CS8
LT1173CS8-5
LT1173CS8-12
LT1173CN8
LT1173CN8-5
LT1173CN8-12
ORDER PART
MAX
150
12.6
30
1.30
5.25
12.6
10
40
100
30
59
32
50
100
0.4
0.4
0.075
0.65
1.0
1.4
NUMBER
1173
11735
117312
W
UNITS
U
%/V
%/V
kHz
mV
mV
mV
nA
nA
%
A
A
A
V
V
V
V
V
V
V
V
V
s