參數(shù)資料
型號： LT1501IS8
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 1.3 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 0.150 INCH, PLASTIC, SO-8
文件頁數(shù)： 4/16頁
文件大?。?/td> 190K
代理商： LT1501IS8
4
LT1500/LT1501
ELECTRICAL CHARACTERISTICS
The
G
denotes specifications which apply over the full operating
temperature range.
Note 1:
Feedback pin or output is held sightly above the regulated value to
force the V
C
node low and switching to stop.
Note 2:
See Typical Performance Characteristics for graph of Guaranteed
Switch Voltage vs Saturation Voltage.
Note 3:
Peak switch current is the guaranteed minimum value of switch
current available in normal operation. Highest calculated switch current at
full load should not exceed the minimum value shown.
Note 4:
Loading on FB pin will affect NFB reference voltage.
V
NFB
= I
FB
/gm.
Do not exceed 10
μ
A loading on FB when NFB is being used.
Note 5:
This is the delay between sense pin current reaching its upper or
lower threshold and switch transition. Switch delay times cause peak-to-
peak inductor current to increase and therefore switching frequency to be
low. This effect will be significant for frequencies above 100kHz. See
Application Information and Typical Performance Characteristics.
Note 6:
Reference voltage under all conditions includes V
IN
= 2.1V to 15V,
all loads and full temperature range.
Note 7:
As with all boost regulators the output voltage of the LT1500
cannot fall to less than input voltage because of the path through the catch
diode. This means that the output voltage divider on adjustable parts will
still be generating feedback voltage at the FB pin (fixed voltage parts have
an internal switch to disconnect the divider in shutdown). If the voltage on
FB is greater than 0.6V in shutdown, the internal error amplifier will draw
current that adds to shutdown current. See graph of Shutdown Current vs
FB voltage in Typical Performance Characteristics.
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
Switching Frequency
(3.3V Output)
LOAD CURRENT (mA)
0
50
100
10
F
100
1000
150
200
250
300
LTC1500/01 TPC20
10
μ
H
20
μ
H
50
μ
H
100
μ
H
BURST REGION
VIN = 2.3V
Switching Frequency (5V Output)
LOAD CURRENT (mA)
0
50
100
10
F
100
1000
150
200
250
300
LTC1500/01 TPC21
10
μ
H
20
μ
H
50
μ
H
100
μ
H
BURST REGION
VIN = 3V
Switching Frequency (12V Output)
LOAD CURRENT (mA)
0
25
50
75
F
1000
100
10
100 125 150 175
200
LTC1500/01 TPC22
10
μ
H
50
μ
H
20
μ
H
100
μ
H
BURST REGION
VIN = 5V
Efficiency (3.3V Output)
LOAD CURRENT (mA)
1
E
100
90
80
70
60
50
40
30
10
100
1000
LTC1500/01 TPC17
T
J
= 25
°
C
V
= 2.3V
LOW LOSS INDUCTOR
L = 100
μ
H
L = 10
μ
H
L = 33
μ
H
Efficiency (5V Output)
100
LOAD CURRENT (mA)
1
E
90
80
70
60
50
40
30
10
100
1000
LTC1500/01 TPC18
V
= 3V
LOW LOSS INDUCTOR
L = 100
μ
H
L = 10
μ
H
L = 33
μ
H
Efficiency (12V Output)
LOAD CURRENT (mA)
1
E
100
90
80
70
60
50
40
30
10
100
1000
LTC1500/01 TPC19
V
IN
= 5V
LOW LOSS INDUCTOR
L = 100
μ
H
L = 10
μ
H
L = 33
μ
H
相關(guān)PDF資料
PDF描述
LT1500CS-5 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LT1500IS-3 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
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