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LT1302CS8 Datasheet(PDF) 4 Page - Linear Technology

Part # LT1302CS8
Description  Micropower High Output Current Step-Up Adjustable and Fixed 5V DC/DC Converters
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1302CS8 Datasheet(HTML) 4 Page - Linear Technology

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LT1302/LT1302-5
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (
°C)
–50
100
90
80
70
60
50
–25
025
50
1302 G10
75
100
TEMPERATURE (
°C)
–50
300
275
250
225
200
175
150
–25
025
50
1302 G11
75
100
SHUTDOWN VOLTAGE (V)
0
20
18
16
14
12
10
8
6
4
2
0
4
5
1302 G12
13
2
6
7
8
TA = 25°C
GND (Pin 1): Signal Ground. Feedback resistor and 0.1
µF
ceramic bypass capacitor from VIN should be connected
directly to this pin.
VC (Pin 2): Frequency Compensation Pin. Connect series
RC to GND. Keep trace short.
SHDN (Pin 3): Shutdown. Pull high to effect shutdown; tie
to ground for normal operation.
FB/Sense (Pin 4): Feedback/Sense. On the LT1302 this
pin connects to CMP1 input. On the LT1302-5 this pin
connects to the output resistor string.
PI FU CTIO S
IT (Pin 5): Normally left floating. Addition of a 3.3k resistor
to GND forces the LT1302 into current mode at light loads.
Efficiency drops at light load but increases at medium
loads. See Applications Information section.
VIN (Pin 6): Supply Pin. Must be bypassed with: (1) a 0.1µF
ceramic to GND, and (2) a large value electrolytic to PGND.
When VIN is greater than 5V, a low value resistor (2Ω to
10
Ω) is recommended to isolate the VIN pin from input
supply noise.
Maximum Duty Cycle
Oscillator Frequency
Shutdown Pin Bias Current
LT1302-5 Output Voltage vs
Load Current
LOAD CURRENT (A)
0
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
0.1 0.2 0.3 0.4
1302 G13
0.5 0.6 0.7 0.8 0.9 1.0
VIN = 2.2V
VIN = 3V
VIN = 4V
Maximum Output Power*
Boost Mode
INPUT VOLTAGE (V)
0
20
16
12
8
4
0
8
1302 G14
2
4
* APPROXIMATE
6
10



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