MAX1760 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1760 Datasheet PDF : 14 Pages
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0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
Typical Operating Characteristics (continued)
(Circuit of Figure 2, VIN = 2.4V, VOUT = 3.3V, TA = +25°C, unless otherwise noted.)
NO-LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
2.5
TOTAL SHUTDOWN CURRENT
(ILX + IOUT) vs. INPUT VOLTAGE
10
INTERNAL OSCILLATOR
FREQUENCY vs. TEMPERATURE
1.20
1.15
2.0
1.10
1.5
1.0
VOUT = 5V
0.5
VOUT = 3.3V
0.0
0
1
2
3
4
5
INPUT VOLTAGE (V)
1
0.1
0
12
3
4
5
6
INPUT VOLTAGE (V)
1.05
1.00
0.95
0.90
0.85
0.80
0.75
-40 -15
10
35
60
85
TEMPERATURE (°C)
STARTUP VOLTAGE
vs. OUTPUT CURRENT
3.0
A = +85°C
B = +25°C
2.5 C = -40°C
2.0
ABC
1.5
1.0
0.5
CIRCUIT OF FIGURE 6
0.0
0.001
0.01
0.1
1
OUTPUT CURRENT (A)
PEAK INDUCTOR CURRENT vs. VISET
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.1 0.3 0.5 0.7 0.9 1.1 1.3
VISET (V)
HEAVY-LOAD SWITCHING WAVEFORMS
A
B
C
0V
A = LX PIN, 5V/div
B = INDUCTOR CURRENT, 200mA/div
C = OUTPUT RIPPLE, 50mV/div AC-COUPLED
t = 400ns/div
LIGHT-LOAD SWITCHING WAVEFORMS
LOAD-TRANSIENT RESPONSE
LINE-TRANSIENT RESPONSE
A
A
A
B
C
B
B
t = 400ns/div
A = LX PIN, 5V/div
B = INDUCTOR CURRENT, 200mA/div
C = OUTPUT RIPPLE, 50mV/div, AC-COUPLED
t = 200ms/div
VIN = 1.1V, VOUT = 3.3V, IOUT = 0 AND 0.2A
A = IOUT, 100mA/div
B = VOUT, 50mV/div, AC-COUPLED
400µs/div
VIN = 2.4V TO 1.4V, IOUT = 70mA
A = VIN, 1V/div
B = VOUT, 5mA/div, AC-COUPLED
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