MAX866 Просмотр технического описания (PDF) - Maxim Integrated
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MAX866 Datasheet PDF : 12 Pages
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3.3V/5V or Adjustable-Output,
Single-Cell DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 2, VIN = 1.2V, ILOAD = 0mA, TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
LBI Input Hysteresis
LBO Output Voltage Low
ISINK = 2mA, open-drain output
LBO Output Leakage Current
–S—H—D—N–, 3/–5– Input Voltage Low
S—H—D—N–, 3/–5– Input Voltage High
S—H—D—N–, 3/–5–, FB, LBI Input Current
LBO = 5V
LBI = 1.5V, FB = 1.5V, –S—H—D—N– = 0V or 3V, 3/–5– = 0V or 3V
FB Voltage
MAX867, output in regulation
Output Voltage Range
MAX867
MIN TYP MAX UNITS
25
mV
0.4
V
1
µA
0.08 x VOUT V
0.32 x VOUT
V
±40 ±100
nA
1.22 1.25 1.28
V
2.7
6.0
V
Note 2: Output current specified with circuit of Figure 2 and CoilCraft D01608-334 inductor for test purposes only. More (or less)
output current can be supplied with other coil types depending on inductance value and coil resistance. See Typical Operating
Characteristics for other coil types. Output voltage and output current are guaranteed over this VIN operating range once the
device has started up. Actual VIN start-up voltage depends on load current.
Note 3: Output voltage specifications over temperature are guaranteed by design to limits that are 6 sigma from either side of the mean.
Note 4: Current measured into OUT. VOUT is forced to 3.47V to maintain LX off when measuring device current.
__________________________________________Typical Operating Characteristics
(Circuits of Figure 2, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT (VOUT = 3.3V)
100
90
L = SUMIDA CD73-331 (330µH, 1.5Ω)
80
70
60
50
TOP TO BOTTOM:
VIN = 2.0V
40
VIN = 1.5V
30
VIN = 1.25V
VIN = 1.0V
20
VIN = 0.75V
10
VIN = 0.5V
0
0.01
0.1
1
10 100
LOAD CURRENT (mA)
1000
EFFICIENCY vs. LOAD CURRENT (VOUT = 3.3V)
100
L = COILCRAFT D01608-334 (330µH, 2.9Ω)
90
80
70
60
50
TOP TO BOTTOM:
VIN = 2.0V
40
VIN = 1.5V
30
VIN = 1.25V
VIN = 1.0V
20
VIN = 0.75V
10
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT (VOUT = 5.0V)
100
L = SUMIDA CD73-331 (330µH, 1.5Ω)
90
80
70
60
50
40
30
20
10
0
0.01
TOP TO BOTTOM:
VIN = 2.0V
VIN = 1.5V
VIN = 1.25V
VIN = 1.0V
VIN = 0.75V
VIN = 0.5V
0.1
1
10 100
LOAD CURRENT (mA)
1000
EFFICIENCY vs. LOAD CURRENT (VOUT = 5.0V)
100
L = COILCRAFT D01608-334 (330µH, 2.9Ω)
90
80
70
60
50
40
TOP TO BOTTOM:
30
VIN = 2.0V
VIN = 1.5V
20
VIN = 1.25V
10
VIN = 1.0V
VIN = 0.75V
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
NO-LOAD BATTERY CURRENT
vs. BATTERY VOLTAGE (VOUT = 3.3V)
1200
DECREASING
BATTERY
1000
VOLTAGE
800
600
400 INCREASING
BATTERY
200 VOLTAGE
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
BATTERY VOLTAGE (V)
NO-LOAD BATTERY CURRENT
vs. BATTERY VOLTAGE (VOUT = 5V)
4000
3500
3000
2500
DECREASING
BATTERY
VOLTAGE
2000
1500
1000
500
INCREASING
BATTERY
VOLTAGE
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
BATTERY VOLTAGE (V)
_______________________________________________________________________________________ 3
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