MAX863EEE 查看數據表（PDF） - Maxim Integrated
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MAX863EEE Datasheet PDF : 16 Pages
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Dual, High-Efficiency, PFM, Step-Up
DC-DC Controller
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. OUTPUT CURRENT
(VOUT1 = 12V, NON-BOOTSTRAPPED)
100
90
80
70
60
50
40
30
20
10
0
0.01
E
D
C
B
A
VOUT1 = 5.0V
A: VIN = 2.7V
B: VIN = 3.3V
C: VIN = 3.6V
D: VIN = 4.0V
E: VIN = 6.0V
0.1
1
10 100 1000
OUTPUT CURRENT (mA)
VDD CURRENT
vs. VDD VOLTAGE
60
BOTH ON
50
40
CONVERTER 1 ON
30
CONVERTER 2 ON
20
10
BOOTSTRAPPED-MODE MINIMUM
START-UP INPUT VOLTAGE
vs. OUTPUT CURRENT
3.5
3.0
VOUT1 = 5V
2.5
2.0
1.5
VOUT1 = 3.3V
1.0
0.5
1
1
10
100
1000
OUTPUT CURRENT (mA)
EXT RISE AND FALL TIMES vs.
SUPPLY VOLTAGE AND MOSFET CAPACITANCE
140
120
C,1
C,2
100
B,1
80
A: 470pF
B: 1.0nF
C: 2.2nF
1: RISE
2: FALL
60
B,2
A,1
40
A,2
20
0
0
24
6
8
VDD VOLTAGE (V)
Cond: Single +5V
LOAD-TRANSIENT RESPONSE
10 12
0
0
2
4
6 8 10 12
RESPONSE ENTERING/
SUPPLY VOLTAGE (V)
Cond Single 5V
EXITING SHUTDOWN (BOOTSTRAPPED)
LINE-TRANSIENT RESPONSE
A
A
A
B
B
C
3.3V
C
0A
B
100µs/div
VOUT1 = 3.3V, IOUT1 = 100mA TO 600mA
A: VOUT1, 100mV/div, 3.3V DC OFFSET
B: IOUT1, 200mA/div
200µs/div
VOUT1 = 3.3V, IOUT1 = 100mA, VIN = 2.4V
A: SHDN1, 5V/div
B: INDUCTOR CURRENT, 2A/div
C: VOUT1, 3.3V OFFSET, 500mV/div
500µs/div
VOUT1 = 5V, IOUT1 = 800mA
A: VIN = 2.7V TO 3.7V, 500mV/div
B: VOUT1, AC COUPLED, 50mV/div
C: INDUCTOR CURRENT, 2A/div
4 _______________________________________________________________________________________
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