MAX1572 Maxim Integrated Products, MAX1572 Datasheet - Page 4

• Manufacturer Part Number: MAX1572
• Description: PWM DC-to-DC Step-Down Converter
• Manufacturer: Maxim Integrated Products

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