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LT1501CS8 数据表(PDF) 6 Page - Linear Technology

部件名 LT1501CS8
功能描述  Adaptive-Frequency Current Mode Switching Regulators
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT1501CS8 数据表(HTML) 6 Page - Linear Technology

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6
LT1500/LT1501
TYPICAL PERFORMANCE CHARACTERISTICS
Peak-to-Peak Inductor Ripple
Current
AVERAGE SWITCH CURRENT
0
220
200
180
160
140
120
100
80
0.3
0.5
LT1500/01 • TPC07
0.1
0.2
0.4
0.6
0.7
VIN = 3.3V
VOUT = 5V
L = 50
µH
NOTE THAT RIPPLE CURRENT
INCREASES WITH SMALLER
INDUCTORS DUE TO
PROPAGATION DELAY
IN THE CURRENT
COMPARATOR
Switch Saturation Voltage
SWITCH CURRENT (A)
0
1.0
0.8
0.6
0.4
0.2
0
0.8
LT1500/01 • TPC06
0.2
0.4
0.6
1.0
TJ = 25°C
INPUT VOLTAGE (V)
0
120
100
80
60
40
20
0
2
46
8
LT1500/01 • TPC01
10
12
TJ = 25°C
LOAD CURRENT IS
REDUCED UNTIL Burst
Mode OPERATION STARTS
VOUT = 3.3V
VOUT = 5V
VOUT = 12V
Burst Mode Threshold
SINK CURRENT (mA)
0
0.6
0.5
0.4
0.3
0.2
0.1
0
1
23
4
LT1500/01 • TPC02
56
TJ = 25°C
VLBI ≤ 1.2V
Low-Battery Output Saturation
Voltage
Quiescent Input Supply Current
INPUT VOLTAGE (V)
0
15
25
LT1500/01 • TPC04
510
20
400
350
300
250
200
150
100
50
0
TJ = 25°C
VFB OR VOUT HELD 5% HIGH,
SO THAT Burst Mode
OPERATION IS ACTIVATED.
DOES NOT INCLUDE
OUTPUT DIVIDER CURRENT
INPUT VOLTAGE (V)
0
20
16
12
8
4
0
20
LT1500/01 • TPC03
5
10
15
25
TJ = 25°C
VSHDN = 0V
Input Current in Shutdown
Shutdown Input Current vs
Feedback Pin Voltage
FEEDBACK PIN VOLTAGE (V)
0
140
120
100
80
60
40
20
0
0.6
1.0
LT1500/01 • TPC05
0.2
0.4
0.8
1.2
1.4
TJ = 25°C
VIN = 5V
ADJUSTABLE PARTS ONLY.
FIXED VOLTAGE PARTS DO
NOT SHOW SHUTDOWN
CURRENT INCREASE WITH
FEEDBACK VOLTAGE



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