LT1173CN8 Linear Technology, LT1173CN8 Datasheet - Page 3

• Manufacturer Part Number: LT1173CN8
• Description: IC DC/DC CONV ADJUSTBL OUT 8-DIP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Invertingr

Specifications of LT1173CN8

• 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: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power - Output: 500mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TYPICAL PERFOR
SYMBOL
V
A
V
The
temperature range.
Note 1: This specification guarantees that both the high and low trip points
of the comparator fall within the 1.20V to 1.30V range.
ELECTRICAL C
SAT
V
SW2
1000
900
800
700
600
500
400
300
200
100
1.2
1.0
0.8
0.6
0.4
0.2
0
0
100
denotes the specifications which apply over the full operating
0
Saturation Voltage Step-Up Mode
(SW2 Pin Grounded)
Maximum Switch Current vs
R
LIM
V
L = 250 H
0.2
IN
Step-Down Mode
= 12V
PARAMETER
SW
Gain Block Gain
Current Limit
Current Limit Temperature Coeff.
Switch OFF Leakage Current
Maximum Excursion Below GND
SAT
0.4
V
L = 500 H
IN
I
V = 2.0V
SWITCH
Voltage, Step-Down Mode
IN
R
= 24V
LIM
0.6
V = 3.0V
IN
( )
(A)
HARA TERISTICS
V
0.8
OUT
W
= 5V
V = 5.0V
LT1173 • TPC01
LT1173 • TPC09
IN
1.0
A
C
1000
U
1.2
CE
C
CONDITIONS
V
R
220 to I
Measured at SW1 Pin
I
HARA TERISTICS
SW1
IN
L
1.0
0.9
0.8
0.7
1.4
1.3
1.2
1.1
20
15
10
= 100k (Note 3)
5
= 12V, I
–50
0
Switch ON Voltage
Step-Down Mode
(SW1 Pin Connected to V
Set Pin Bias Current vs
Temperature
10 A, Switch Off
0.1 0.2
–25
LIM
T
A
SW
C
to V
= 25 C, V
= 650mA
0
TEMPERATURE (°C)
IN
0.3
I
SWITCH
25
0.4
Note 2: The output voltage waveform will exhibit a sawtooth shape due to
the comparator hysteresis. The output voltage on the fixed output versions
will always be within the specified range.
Note 3: 100k resistor connected between a 5V source and the AO pin.
IN
50
= 3V, unless otherwise noted.
(A)
0.5
75
V = 3V
0.6
IN
IN
LT1173 • TPC02
)
LT1173 •TPC04
100
0.7 0.8
125
MIN
400
1200
1100
1000
900
800
700
600
500
400
300
200
100
10
18
16
14
12
8
– 0.3
– 400
TYP
–50
10
1.1
1000
400
1
Maximum Switch Current vs
R
Feedback Pin Bias Current vs
Temperature
LIM
–25
Step-Up Mode
0
TEMPERATURE (°C)
– 350
MAX
1.5
1.7
10
R
25
LIM
100
( )
2V V
50
LT1173
IN
75
V = 3V
IN
LT1173 • TPC03
5V
LT1173 •TPC05
100
UNITS
%/ C
3
V/V
mA
mV
1000
125
V
V
A