參數(shù)資料
型號(hào): LT1576IS8#TR
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 3.5 A SWITCHING REGULATOR, 240 kHz SWITCHING FREQ-MAX, PDSO8
封裝: 0.150 INCH, PLASTIC, SOP-8
文件頁數(shù): 24/28頁
文件大小: 290K
代理商: LT1576IS8#TR
5
LT1576/LT1576-5
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Kool M
is a registered trademark of Magnetics, Inc.
JUNCTION TEMPERATURE (
°C)
–50
240
220
200
180
160
100
1576 G13
–25
0
25
50
75
125
FREQUENCY
(kHz)
Switching Frequency
INPUT VOLTAGE (V)
0
CURRENT
(A)
1.50
1.25
1.00
0.75
0.50
0.25
0
510
15
20
1576 G15
25
VOUT = 10V
L = 60
H
L = 30
H
L = 15
H
Maximum Load Current
at VOUT = 10V
LOAD CURRENT (mA)
1
INPUT
VOLTAGE
(V)
7
6
5
10
VOUT = 5V
100
1000
1576 G14
MINIMUM
STARTING VOLTAGE
MINIMUM
RUNNING VOLTAGE
Minimum Input Voltage
at VOUT = 5V
INPUT VOLTAGE (V)
0
CURRENT
(A)
1.50
1.25
1.00
0.75
0.50
0.25
0
510
15
20
1576 G16
25
VOUT = 5V
L = 60
H
L = 30
H
L = 15
H
Maximum Load Current
at VOUT = 5V
INDUCTANCE (
H)
05
CORE
LOSS
(W)
CORE
LOSS
(%
OF
5W
LOAD)
1.0
0.1
0.01
0.001
10
15
20
12
8
4
2
1.2
0.8
0.4
0.2
0.12
0.08
0.04
0.02
25
1576 G18
TYPE 52
POWDERED IRON
Kool M
PERMALLOY
= 125
VOUT = 5V, VIN = 10V, IOUT = 1A
CORE LOSS IS
INDEPENDENT OF LOAD
CURRENT UNTIL LOAD CURRENT FALLS
LOW ENOUGH FOR CIRCUIT TO GO INTO
DISCONTINUOUS MODE
Inductor Core Loss
INPUT VOLTAGE (V)
0
CURRENT
(A)
1.50
1.25
1.00
0.75
0.50
0.25
0
510
15
20
1576 G17
25
VOUT = 3.3V
L = 30
H
L = 15
H
L = 60
H
Maximum Load Current
at VOUT = 3.3V
FEEDBACK VOLTAGE (V)
0
SWITCHING
FREQUENCY
(kHz)
OR
CURRENT
(
A)
2.0
1576 G12
0.5
1.0
1.5
250
200
150
100
50
0
FEEDBACK PIN CURRENT
SWITCHING FREQUENCY
Shutdown Supply Current
JUNCTION TEMPERATURE (
°C)
–50
TRANSCONDUCTANCE
(
Mho)
100
1576 G11
050
1600
1400
1200
1000
800
600
400
200
0
–25
25
75
125
Error Amplifier Transconductance
Frequency Foldback
SHUTDOWN VOLTAGE (V)
0
INPUT
SUPPLY
CURRENT
(
A)
0.4
1576 G10
0.1
0.2
0.3
100
75
50
25
0
VIN = 25V
VIN = 10V
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