MAX8660ETL(2006) Ver la hoja de datos (PDF) - Maxim Integrated
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fabricante
MAX8660ETL
(Rev.:2006)
(Rev.:2006)
Maxim Integrated
MAX8660ETL Datasheet PDF : 42 Pages
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High-Efficiency, Low-IQ, PMICs with Dynamic
Voltage Management for Mobile Applications
Typical Operating Characteristics (continued)
(Circuit of Figure 3, VIN = 3.6V, TA = +25°C, unless otherwise noted.)
REG2 EFFICIENCY vs. LOAD CURRENT
95
90
FORCED-PWM
NORMAL
85
80
75
VIN = 4.2V
70
VIN = 3.6V
65
60
55
50
0.01
L2 = 2.0μH
(TOKO DE2812C)
V2 = 1.8V
0.1
1
10 100 1000
LOAD CURRENT (mA)
REG2 OUTPUT VOLTAGE
vs. INPUT VOLTAGE
1.95
1.90
10mA LOAD
1.85
1.80
1.75
800mA LOAD
1.70
1.65
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
INPUT VOLTAGE (V)
REG2 LINE TRANSIENT
MAX8660 toc17
5.0V
VIN
3.6V
1V/div
V2
450mA LOAD,
V2 = 1.8V
40μs/div
100mV/div
REG2 LOAD REGULATION
1.85
VIN = 3.6V
1.83
-1.7%/A
1.81
1.79
1.77
1.75
0
FORCED-PWM
NORMAL
200
400
600
800
LOAD CURRENT (mA)
REG2 OUTPUT VOLTAGE vs. TEMPERATURE
1.90
1.88 800mA LOAD
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.70
-40 -15
10
35
60
85
TEMPERATURE (°C)
REG2 DROPOUT VOLTAGE vs. LOAD CURRENT
300
THE NOMINAL ESR OF TOKO'S 2.0 μH
DE2812C INDUCTOR IS 67mΩ. THE NOMINAL
250 p-CHANNEL RESISTANCE OF THE REG2 IS
180mΩ. THE SLOPE OF THIS LINE SHOWS
200
THAT THE TOTAL REG2 DROPOUT
RESISTANCE OF AN AVERAGE
PART, BOARD, INDUCTOR
150 COMBINATION IS 255mΩ.
100
50
0
0
200 400 600 800 1000
LOAD CURRENT (mA)
REG2 LOAD TRANSIENT
MAX8660 toc21
REG2 HEAVY-LOAD SWITCHING WAVEFORMS
MAX8660 toc22
REG2 LIGHT-LOAD SWITCHING WAVEFORMS
MAX8660 toc23
VLX2
V2
100mV/div
2V/div
VLX2
2V/div
600mA
V2
200mA/div
IV2
IL2
10mA
V2 = 1.8V
20μs/div
2mV/div V2
1A/div IL2
0A
800mA LOAD
400ns/div
20mV/div
2μs/div
200mA/div
0A
30mA LOAD
______________________________________________________________________________________ 13
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