LT1302 データシートの表示（PDF） - Linear Technology
部品番号
コンポーネント説明
一致するリスト
LT1302
Linear Technology
LT1302 Datasheet PDF : 16 Pages
| |||
LT1302/LT1302-5
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Duty Cycle
100
90
80
70
60
50
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1302 G10
Oscillator Frequency
300
275
250
225
200
175
150
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1302 G11
Shutdown Pin Bias Current
20
18 TA = 25°C
16
14
12
10
8
6
4
2
0
01 2 34 56
SHUTDOWN VOLTAGE (V)
78
1302 G12
LT1302-5 Output Voltage vs
Load Current
5.20
5.15
5.10
5.05
5.00
VIN = 4V
4.95
VIN = 2.2V
VIN = 3V
4.90
4.85
4.80
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
1302 G13
Maximum Output Power*
Boost Mode
20
16
12
8
4
0
0
2
4
6
8
10
INPUT VOLTAGE (V)
* APPROXIMATE
1302 G14
PI FU CTIO S
GND (Pin 1): Signal Ground. Feedback resistor and 0.1µF
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.
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
10Ω) is recommended to isolate the VIN pin from input
supply noise.
4
Share Link: