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| MAX1947 Datasheet, PDF (3/10 Pages) Maxim Integrated Products – Low Input/Output Voltage Step-Up DC-DC Converter with RESET | |||
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Low Input/Output Voltage
Step-Up DC-DC Converter with RESET
ELECTRICAL CHARACTERISTICS (continued)
(VBATT = 1.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Startup to Normal-Mode Output
Transition Voltage
NFET Current Limit
PFET Turn-Off Current
Internal NFET
On-Resistance
Internal PFET
On-Resistance
LX Leakage Current
SHUTDOWN MODE
Shutdown Supply Current
50mV hysteresis, rising edge
TA = 0°C to +85°C
TA = -40°C to +85°C
TA = 0°C to +85°C
TA = -40°C to +85°C
MAX1947ETA18
ILX = 100mA
MAX1947ETA25
MAX1947ETA30
MAX1947ETA33
MAX1947ETA18
ILX = 100mA
MAX1947ETA25
MAX1947ETA30
MAX1947ETA33
SHDN = GND, VOUT = 0V, TA = +25°C
VLX = 3.6V
TA = +85°C
SHDN = GND
1.40 1.62 1.73
V
600
800 1000
mA
580
800 1000
15
75
150
mA
10
75
150
0.3
0.6
0.22 0.44
â¦
0.17 0.34
0.15 0.3
0.5
1.0
0.35 0.7
â¦
0.28 0.56
0.25 0.5
0.1
1
µA
1
2
4
µA
SHDN Input Voltage
SHDN Input Bias Current
OUT Discharge Resistance in
Shutdown
RESET OUTPUT
Reset OUT Voltage Trip Level
Minimum VOUT for Valid Reset
Reset Timeout
RESET Output Voltage
VIH
VIL
SHDN = OUT or GND, TA = +25°C
SHDN = OUT or GND, TA = +85°C
SHDN = GND
VOUT falling, 1% hysteresis
ISINK = 200µA
ISOURCE = 200µA
0.8 x
VBATT
V
0.18 x
VBATT
1
100
nA
5
500 1000
â¦
87
90
93
%
0.9
V
65
140 235
ms
0.8 x VOUT
0.3
V
Note 2: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design.
Note 3: When BATT is greater than the output-voltage set point, the part is in track mode (see the Track Mode section).
_______________________________________________________________________________________ 3
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