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MAX1572ETC250 データシートの表示(PDF) - Maxim Integrated

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MAX1572ETC250 Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
800mA, 2MHz, PWM DC-to-DC
Step-Down Converter with RESET
ELECTRICAL CHARACTERISTICS (continued)
(VBATT = 3.6V, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
MIN
EN_ Logic Input Low
EN_ Logic Input Current
RESET Threshold
Percent of nominal, measured at OUT
87
RESET Timer Delay Time
From VOUT > 90% to RESET = HI
170
RESET Output Low Level
ISINK = 1mA
RESET Internal Pullup Resistance to OUT
9
Note 2: Guaranteed by design, not production tested.
Note 3: Specifications to -40°C are guaranteed by design and not production tested.
TYP
MAX UNITS
0.4
V
1
µA
93
%
230
ms
0.2
V
20
k
Typical Operating Characteristics
(VBATT = 3.6V, VOUT = 1.5V, EN1 = GND, EN2 = BATT, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
WITH 2.5V OUTPUT
100
90
80
VIN = 2.6V VIN = 3.6V VIN = 5V
70
60
50
40
1
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
vs. MODE
100
PULSE-
90 GROUP MODE
80
70
PULSE-
SKIP MODE
60
FORCED-
PWM MODE
50
40
1
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
WITH 1.8V OUTPUT
100
EFFICIENCY vs. LOAD CURRENT
WITH 1.5V OUTPUT
100
90
90
80
80
70
VIN = 2.6V VIN = 3.6V VIN = 5V
70
VIN = 2.6V VIN = 3.6V VIN = 5V
60
60
50
50
40
1
10
100
LOAD CURRENT (mA)
OUTPUT VOLTAGE
vs. LOAD CURRENT
1.58
1.56
1.54
TA = +85°C
1.52
1.50
1.48
TA = +25°C
1.46
TA = -40°C
1.44
1.42
1.40
0
200
400
600
LOAD CURRENT (mA)
40
1000
1
10
100
1000
LOAD CURRENT (mA)
OUTPUT VOLTAGE vs. INPUT VOLTAGE
WITH 100mA LOAD
1.55
1.53
1.51
1.49
TA = -40°C
TA = +85°C
TA = +25°C
1.47
1.45
800
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
4 _______________________________________________________________________________________

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