Typical operating characteristics (continued) – Rainbow Electronics MAX1797 User Manual
Page 6
MAX1795/MAX1796/MAX1797
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
6
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(L = 22µH, C
IN
= 47µF, C
OUT
= 47µF, T
A
= +25
°C, unless otherwise noted.)
0.800
0.850
0.825
0.900
0.875
0.925
0.950
0
1.0 1.5 2.0
0.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
LOW-BATTERY INPUT THRESHOLD
vs. INPUT BATT VOLTAGE
BATT VOLTAGE (V)
LOW-BATTERY INPUT THRESHOLD (V)
MAX1795/96/97 toc10
INCREASING V
LBI
DECREASING V
LBI
0
50
100
150
200
250
0
1.5 2.0
0.5 1.0
2.5 3.0 3.5 4.0 4.5
MAX1795
MAXIMUM OUTPUT CURRENT
vs. BATT INPUT VOLTAGE
MAX1795/96/97 toc12
BATT VOLTAGE (V)
LOAD CURRENT (mA)
V
OUT
= +5.0V
V
OUT
= +3.3V
0.800
0.875
0.900
0.925
0.950
-40
10
-15
35
60
85
MAX1795/96/97 toc12
TEMPERATURE (
°C)
LOW-BATTERY INPUT THRESHOLD (V)
LOW-BATTERY INPUT THRESHOLD
vs. TEMPERATURE
V
BATT
= +3.6V
INCREASING V
LBI
DECREASING V
LBI
0.850
0.825
0
100
200
300
400
500
0
1.5 2.0
0.5 1.0
2.5 3.0 3.5 4.0 4.5
MAX1796
MAXIMUM OUTPUT CURRENT
vs. BATT INPUT VOLTAGE
MAX1795/96/97 toc13
BATT VOLTAGE (V)
LOAD CURRENT (mA)
V
OUT
= +5.0V
V
OUT
= +3.3V
0
200
400
600
800
1000
0
1.5 2.0
0.5 1.0
2.5 3.0 3.5 4.0 4.5
MAX1795/96/97 toc14
BATT VOLTAGE (V)
LOAD CURRENT (mA)
MAX1797
MAXIMUM OUTPUT CURRENT
vs. BATT INPUT VOLTAGE
V
OUT
= +3.3V
V
OUT
= +5.0V
0
0.4
0.8
1.2
1.6
2.0
0
1.0 1.5
0.5
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUT LEAKAGE CURRENT
vs. OUTPUT VOLTAGE
MAX1795/96/97 toc15
OUTPUT VOLTAGE (V)
OUT LEAKAGE CURRENT (
µ
A)
SHDN = BATT
V
OUT
= +5V
V
BATT
= +2.4V
OUT BIASED WITH
EXTERNAL VOLTAGE
SOURCE
4.00
µs/div
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1795/96/97 toc16
V
LX
5V/div
I
INDUCTOR
500mA/div
V
OUT
(AC-COUPLED)
100mV/div
V
IN
= +3.6V
V
OUT
= +5.0V
I
LOAD
= 400mA