Typical operating characteristics (continued) – Rainbow Electronics MAX859 User Manual
Page 4
MAX856–MAX859
3.3V/5V or Adjustable-Output,
Step-Up DC-DC Converters
4
_______________________________________________________________________________________
_____________________________Typical Operating Characteristics (continued)
(Circuits of Figure 2, T
A
= +25°C, unless otherwise noted.)
0.75
0.1
10
MAX856/MAX857
MINIMUM START-UP INPUT VOLTAGE
vs. LOAD CURRENT
MAX856-06
LOAD CURRENT (mA)
START-UP INPUT VOLTAGE (V)
0.90
1.10
0.80
1.00
1
100
1.15
1.05
0.95
0.85
V
OUT
= 3.3V
V
OUT
= 5V
0.1
10
MAX858/MAX859
MINIMUM START-UP INPUT VOLTAGE
vs. LOAD CURRENT
MAX856-07
LOAD CURRENT (mA)
START-UP INPUT VOLTAGE (V)
0.9
1.3
1.1
1
100
1.4
1.2
1.0
0.8
V
OUT
= 5V
0.8
2.0
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
0.7
MAX856-11
SHUTDOWN CURRENT (
µ
A)
0.5
1.5
0.6
2.5
3.0
0.4
0.3
0.2
0.1
0
3.5
4.0
INPUT VOLTAGE (V)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0.9
1.0
80
2.0
MAX858/MAX859
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
70
MAX856-12
LOAD CURRENT (mA)
50
1.5
60
2.5
3.0
40
30
20
10
0
3.5
4.0
INPUT VOLTAGE (V)
90
100
1.0
V
OUT
= 5.0V
V
OUT
= 3.3V
400
1.0
MAX856/MAX857
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
350
MAX856-13
LOAD CURRENT (mA)
250
300
2.0
1.5
2.5
200
150
100
50
0
3.0
3.5
4.0
INPUT VOLTAGE (V)
V
OUT
= 5.0V
V
OUT
= 3.3V
1.6
2.0
QUIESCENT CURRENT
vs. INPUT VOLTAGE
1.4
MAX856-10
QUIESCENT CURRENT (mA)
1.0
1.5
1.2
2.5
3.0
0.8
0.6
0.4
0.2
0
3.5
4.0
INPUT VOLTAGE (V)
SEE NOTE 2
IN THE ELECTRICAL
CHARACTERISTICS
T
A
= +85°C
T
A
= -40°C
1.6
2.0
MAX858/MAX859
NO LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
1.4
MAX856-09
QUIESCENT CURRENT (mA)
1.0
1.5
1.2
2.5
3.0
0.8
0.6
0.4
0.2
0
3.5
4.0
INPUT VOLTAGE (V)
INCLUDES ALL EXTERNAL
COMPONENT LEAKAGES.
CAPACITOR LEAKAGE
DOMINATES AT T
A
= +85°C.
CAPS ARE SPRAGUE 595D
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
400
2.0
MAX856/MAX857
NO LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
350
MAX856-08
QUIESCENT CURRENT (
µ
A)
250
1.5
300
2.5
3.0
200
150
100
50
0
3.5
4.0
INPUT VOLTAGE (V)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
INCLUDES ALL EXTERNAL
COMPONENT LEAKAGES.
CAPACITOR LEAKAGE
DOMINATES AT T
A
= +85°C.
CAPS ARE SPRAGUE 595 D
5
0
REFERENCE VOLTAGE vs. CURRENT
6
10
MAX856-05
REFERENCE LOAD CURRENT (
µ
A)
V
REF
LOAD REGULATION (mV)
8
7
100
200
9
50
150
250
4
3
2
1
0