MAX8733A 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8733A
Maxim Integrated
MAX8733A Datasheet PDF : 33 Pages
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High-Efficiency, Quad-Output, Main Power-
Supply Controllers for Notebook Computers
Typical Operating Characteristics (continued)
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = VCC, SHDN = V+,
RCS = 7mΩ, VILIM_ = 0.5V, TA = +25°C, unless otherwise noted.)
LDO5 REGULATOR OUTPUT VOLTAGE
vs. OUTPUT CURRENT
5.00
4.99
4.98
4.97
4.96
4.95
0 10 20 30 40 50 60 70 80 90 100
LDO5 OUTPUT CURRENT (mA)
LDO3 REGULATOR OUTPUT VOLTAGE
vs. OUTPUT CURRENT
3.350
3.348
3.346
3.344
3.342
3.340
3.338
3.336
3.334
3.332
3.330
0 10 20 30 40 50 60 70 80 90 100
LDO3 OUTPUT CURRENT (mA)
REFERENCE VOLTAGE
vs. OUTPUT CURRENT
2.005
2.004
2.003
2.002
2.001
2.000
1.999
1.998
1.997
1.996
1.995
-10 0 10 20 30 40 50 60 70 80 90 100
IREF (µA)
DELAYED-START WAVEFORMS
DELAYED-START WAVEFORMS
REF, LDO3, AND LDO5 POWER-UP
MAX8732A/3A/4A toc22
V+
(ON3 = REF)
MAX8732A/3A/4A toc23
(ON5 = REF)
MAX8732A/3A/4A toc24
10V
10V/div
LDO5
5V
ON5
5V
5V/div
ON3
0
2V/div
0
OUT5
0
5V/div
LDO3
2V/div
2V/div
0
OUT5
2V/div
0
REF
0
OUT3
0
1V/div
2V/div
OUT3
0
0
2V/div
0
400µs/div
100µs/div
100µs/div
SOFT-START WAVEFORMS
MAX8732A/3A/4A toc25
SHUTDOWN WAVEFORMS
MAX8732A/3A/4A toc26
MAX8732A/MAX8734A (TON = VCC)
5V PWM-MODE
LOAD TRANSIENT RESPONSE
MAX8732A/3A/4A toc27
5A
IL5
5V
5A/div
0
0
5A
IL3
5A/div
3.3V
0
0
3.3V
OUT3
5V
0
5V/div
0
SWITCHING
5V
OUT5
5V
0
5V/div
0
200µs/div
10ms/div
ON3
5V/div
5V
OUT3
5V/div
4A
OUT5
5V/div 1A
5V
DL3
5V/div
0
20µs/div
VOUT,
AC-
COUPLED
100mV/div
INDUCTOR
CURRENT
2A/div
DL5
5V/div
10 ______________________________________________________________________________________
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