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LT1173 Datasheet(PDF) 2 Page - Linear Technology

Part # LT1173
Description  Micropower DC/DC Converter Adjustable and Fixed 5V, 12V
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1173 Datasheet(HTML) 2 Page - Linear Technology

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LT1173
2
PACKAGE/ORDER I FOR ATIO
LT1173CN8
LT1173CN8-5
LT1173CN8-12
A
G
A
U
A
R
BSOLUTEXI
TI
S
Supply Voltage (VIN) ................................................ 36V
SW1 Pin Voltage (VSW1) .......................................... 50V
SW2 Pin Voltage (VSW2) ............................. – 0.5V to VIN
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
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
Switch Off
q
110
150
µA
IQ
Quiescent Current, Boost
No Load
LT1173-5
135
µA
Mode Configuration
LT1173-12
250
µA
VIN
Input Voltage
Step-Up Mode
q
2.0
12.6
V
Step-Down Mode
q
30
V
Comparator Trip Point Voltage
LT1173 (Note 1)
q
1.20
1.245
1.30
V
VOUT
Output Sense Voltage
LT1173-5 (Note 2)
q
4.75
5.00
5.25
V
LT1173-12 (Note 2)
q
11.4
12.0
12.6
V
Comparator Hysteresis
LT1173
q
510
mV
Output Hysteresis
LT1173-5
q
20
40
mV
LT1173-12
q
50
100
mV
fOSC
Oscillator Frequency
q
18
23
30
kHz
Duty Cycle
Full Load
q
43
51
59
%
tON
Switch ON Time
ILIM tied to VIN
q
17
22
32
µs
Feedback Pin Bias Current
LT1173, VFB = 0V
q
10
50
nA
Set Pin Bias Current
VSET = VREF
q
20
100
nA
VOL
Gain Block Output Low
ISINK = 100µA, VSET = 1.00V
q
0.15
0.4
V
Reference Line Regulation
2.0V
≤ VIN ≤ 5V
q
0.2
0.4
%/V
5V
≤ VIN ≤ 30V
q
0.02
0.075
%/V
VSAT
SWSAT Voltage, Step-Up Mode
VIN = 3.0V, ISW = 650mA
q
0.5
0.65
V
VIN = 5.0V, ISW = 1A
0.8
1.0
V
q
1.4
V
TA = 25°C, VIN = 3V, unless otherwise noted.
ELECTRICAL C
C
HARA TERISTICS
1
2
3
4
8
7
6
5
TOP VIEW
ILIM
VIN
SW1
SW2
FB (SENSE)*
SET
AO
GND
N8 PACKAGE
8-LEAD PLASTIC DIP
*FIXED VERSIONS
TJMAX = 90°C, θJA = 130°C/W
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SOIC
*FIXED VERSIONS
1
2
3
4
8
7
6
5
ILIM
VIN
SW1
SW2
FB (SENSE)*
SET
AO
GND
TJMAX = 90°C, θJA = 150°C/W
LT1173CS8
LT1173CS8-5
LT1173CS8-12
ORDER PART
NUMBER
S8 PART MARKING
1173
11735
117312


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