參數(shù)資料
型號: LT1302- 5
廠商: Linear Technology Corporation
英文描述: Micropower High Output Current Step-Up Fixed 5V DC/DC Converters(微功耗,高輸出電流,5V固定輸出電壓,步升DC/DC變換器)
中文描述: 微高輸出電流升壓型固定5V直流/直流轉(zhuǎn)換器(微功耗,高輸出電流,5V的固定輸出電壓,步升直流/直流變換器)
文件頁數(shù): 4/16頁
文件大?。?/td> 313K
代理商: LT1302- 5
4
LT1302/LT1302-5
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
TEMPERATURE (
°
C)
–50
D
100
90
80
70
60
50
–25
0
25
50
1302 G10
75
100
TEMPERATURE (
°
C)
–50
F
300
275
250
225
200
175
150
–25
0
25
50
1302 G11
75
100
SHUTDOWN VOLTAGE (V)
0
S
μ
A
20
18
16
14
12
10
8
6
4
2
0
4
5
1302 G12
1
3
2
6
7
8
T
A
= 25
°
C
GND (Pin 1):
Signal Ground. Feedback resistor and 0.1
μ
F
ceramic bypass capacitor from V
IN
should be connected
directly to this pin.
V
C
(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
U
I
T
(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.
V
IN
(Pin 6):
Supply Pin. Must be bypassed with: (1) a 0.1
μ
F
ceramic to GND, and (2) a large value electrolytic to PGND.
When V
IN
is greater than 5V, a low value resistor (2
to
10
) is recommended to isolate the V
IN
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
O
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
V
IN
= 2.2V
V
IN
= 3V
V
IN
= 4V
Maximum Output Power*
Boost Mode
INPUT VOLTAGE (V)
0
O
20
16
12
8
4
0
8
1302 G14
2
4
* APPROXIMATE
6
10
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