MAX1964 查看數據表（PDF） - Maxim Integrated
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MAX1964 Datasheet PDF : 30 Pages
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Tracking/Sequencing Triple/Quintuple
Power-Supply Controllers
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN = 12V, VOUT = 3.3V, TA = +25°C, unless otherwise noted.)
OUPUT VOLTAGE vs. LOAD CURRENT
(ADJUSTABLE MODE)
5.05
5.03
5.01
4.99
4.97
4.95
0
0.5
1.0
1.5
2.0
LOAD CURRENT (A)
INTERNAL 5V LINEAR REGULATOR
vs. LOAD CURRENT
5.05
5.03
5.01
4.99
4.97
4.95
0
5 10 15 20 25 30
LOAD CURRENT (mA)
LOAD TRANSIENT
(STEP-DOWN CONVERTER)
MAX1964/65 toc06
5.0V
A
1A
B
0
40µs/div
A. VOUT = 5V, 100mV/div
B. IOUT = 10mA TO 1A, 500mA/div
VIN = 12V
5.00V
4.95V
12V
0
1A
0.5A
SWITCHING WAVEFORMS
(STEP-DOWN CONVERTER)
MAX1964/65 toc07
5V
A
0
5V
B
0
1A
C
0
SOFT-START
(STEP-DOWN CONVERTER)
MAX1964/65 toc08
A
B
MAX1964 STARTUP WAVEFORM
(VOLTAGE SEQUENCING)
MAX1964/65 toc09
5V
A
1.8V
B
3.3V
C
C
D
40µs/div
A. VOUT = 5.0V, 50mV/div
B. VLX,10V/div
C. INDUCTOR CURRENT, 500mA/div
VIN = 12V, ROUT1 = 5V
1ms/div
A. VL = 5V, 5V/div
B. VOUT1 = 5V (ADJ),2V/div
C. INDUCTOR CURRENT, 1A/div
VIN = STEPPED FROM 0 TO 12V, ROUT1 = 10Ω
200µs/div
A. VOUT1 = 5V (ADJ), 2V/div
B. VOUT2 = 1.8V, 1V/div
C. VOUT3 = 3.3V, 2V/div
D. VPOK, 5V/div
VIN = STEPPED FROM 0 TO 12V, ROUT1 = 5Ω
6 _______________________________________________________________________________________
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