MAX1534 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1534
Maxim Integrated
MAX1534 Datasheet PDF : 16 Pages
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High-Efficiency, Triple-Output, Keep-Alive
Power Supply for Notebook Computers
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = +12V, PRESET = GND, TA = +25°C, unless otherwise noted.)
SWITCHING FREQUENCY
vs. LOAD CURRENT, CIRCUIT 1, ILIM = IN
200
180
160
VIN = 20V
140
120
100
80
VIN = 12V
60
40
VIN = 7V
20
0
0 50 100 150 200 250 300 350 400 450 500
IOUT3 (mA)
NO-LOAD SUPPLY CURRENT
vs. VIN, CIRCUIT 1, ILIM = GND
140
120
100
SHDN = IN
80
60 SHDN = IN
VOUT3 NOT CONNECTED
40 TO VLDOIN
SHDN = GND
20
0
6
10
14
18
22
26
VIN (V)
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
6
PEAK SWITCH CURRENT
vs. VIN, CIRCUIT 1, ILIM = IN
L = 10µH
L = 15µH
L = 22µH
IOUT3 = 300mA
10
14
18
22
26
VIN (V)
1A
0
10V
0
500mA
0
BUCK LOAD TRANSIENT
MAX1534 toc09
VOUT3
200mV/div
AC-COUPLED
ILX
1A/div
VLX
10V/div
IOUT3
500mA/div
40µs/div
VIN = 12V, IOUT3 = 100mA TO 450mA
LINE TRANSIENT
MAX1534 toc10
15V
VIN
5V/div
10V
VOUT3
200mV/div
AC-COUPLED
1A
0
100µs/div
VIN = 10V TO 15V, IOUT3 = 300mA
ILX
500mA/div
LINE TRANSIENT NEAR DROPOUT
MAX1534 toc11
10V
VIN
5V/div
5V
VOUT3
200mV/div
AC-COUPLED
1A
ILX
500mA/div
0
100µs/div
VIN = 5.2V TO 10V, IOUT3 = 300mA
6 _______________________________________________________________________________________
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