MAX1572 Datasheet, PDF (4/11 Pages) Maxim Integrated Products – 800mA, 2MHz, PWM DC-to-DC Step-Down Converter with RESET

800mA, 2MHz, PWM DC-to-DC
Step-Down Converter with RESET
ELECTRICAL CHARACTERISTICS (continued)
(V_BATT = 3.6V, T_A = -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 V_OUT > 90% to RESET = HI
170
RESET Output Low Level
I_SINK = 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
kΩ
Typical Operating Characteristics
(V_BATT = 3.6V, V_OUT = 1.5V, EN1 = GND, EN2 = BATT, T_A = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
WITH 2.5V OUTPUT
100
90
80
V_IN = 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
90
80
70
V_IN = 2.6V V_IN = 3.6V VIN = 5V
60
50
40
1
10
100
1000
LOAD CURRENT (mA)
OUTPUT VOLTAGE
vs. LOAD CURRENT
1.58
1.56
1.54
T_A = +85°C
1.52
1.50
1.48
T_A = +25°C
1.46
T_A = -40°C
1.44
1.42
1.40
0
200
400
600
800
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
WITH 1.5V OUTPUT
100
90
80
70
V_IN = 2.6V V_IN = 3.6V V_IN = 5V
60
50
40
1
10
100
1000
LOAD CURRENT (mA)
OUTPUT VOLTAGE vs. INPUT VOLTAGE
WITH 100mA LOAD
1.55
1.53
1.51
1.49
T_A = -40°C
T_A = +85°C
T_A = +25°C
1.47
1.45
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
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