MAX1549 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1549
Maxim Integrated
MAX1549 Datasheet PDF : 35 Pages
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Dual, Interleaved, Fixed-Frequency Step-Down
Controller with a Dynamically Adjustable Output
Typical Operating Characteristics (continued)
(MAX1549 circuit of Figure 1, VIN = 12V, VDD = VCC = 5V, SKIP = GND, FSEL = open, TA = +25°C, unless otherwise noted.)
2.5V OUTPUT LOAD TRANSIENT
2.5V OUTPUT LOAD TRANSIENT
(FORCED PWM)
MAX1549 toc19
(PULSE SKIPPING)
MAX1549 toc20
4A
0
2.55V
2.50V
2.45V
4A
A
0
B
2.55V
2.50V
5V
A
0
10A
B
0
2.5V
4A
4A
C
0
C
5A
0
0
0
12V
12V
D
D
5V
0
0
0
OUTPUT OVERLOAD
(UVP ENABLED)
MAX1549 toc21
A
B
C
D
E
40µs/div
A: IOUT2 = 0 TO 4A, 5A/div C: INDUCTOR CURRENT, 5A/div
B: VOUT2 = 2.5V, 100mV/div D: LX2, 10V/div
SKIP = VCC
20µs/div
A: IOUT2 = 0.2A TO 4A, 5A/div C: INDUCTOR CURRENT, 5A/div
B: VOUT2 = 2.5V, 50mV/div D: LX2, 10V/div
SKIP = GND
40µs/div
A: PGOOD2, 5V/div
D: INDUCTOR CURRENT, 5A/div
B: LOAD (2.5A TO 10A), 10A/div E: DL2, 5V/div
C: 2.5V OUTPUT, 2V/div
MAX1549 DYNAMIC OUTPUT VOLTAGE
TRANSITION (CREFIN = 100pF)
MAX1549 toc22
3.3V
A
0
1.5V
B
1.0V
1.5V
C
1.0V
12V
D
0
5A
0
E
-5A
40µs/div
A: GATE, 5V/div
D: LX1, 10V/div
B: REFIN1, 0.5V/div
E: INDUCTOR CURRENT, 10A/div
C: OUT1 (1.0V TO 1.5V), 0.5V/div
200mA LOAD, SKIP = GND
MAX1549 DYNAMIC OUTPUT VOLTAGE
TRANSITION (CREFIN = 1nF)
MAX1549 toc23
3.3V
A
0
1.5V
B
1.0V
1.5V
C
1.0V
12V
D
0
2.5A
0
-2.5A
E
100µs/div
A: GATE, 5V/div
D: LX1, 10V/div
B: REFIN1, 0.5V/div
E: INDUCTOR CURRENT, 5A/div
C: OUT1 (1.0V TO 1.5V), 0.5V/div
200mA LOAD, SKIP = GND
10 ______________________________________________________________________________________
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