Rainbow-electronics MAX1813 Manual do Utilizador Página 9

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MAX1813
Dynamically-Adjustable, Synchronous Step-Down
Controller with Integrated Voltage Positioning
_______________________________________________________________________________________ 9
220
260
240
300
280
320
340
-40 10-15 35 60 85
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX1813 toc09
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
I
OUT
= 20A
I
OUT
= 10A
I
OUT
= 5A
I
OUT
= 1A
260
280
300
320
340
360
380
400
420
-40 -15 10 35 60 85
ON TIME
vs. TEMPERATURE
MAX1813 toc10
TEMPERATURE (°C)
ON TIME (ns)
I
OUT
= 1A
I
OUT
= 5A
I
OUT
= 20A
I
OUT
= 10A
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
-40 -15 10 35 60 85
CURRENT-LIMIT DEVIATION
vs. TEMPERATURE
MAX1813 toc11
TEMPERATURE (°C)
V
VPCS
DEVIATION (mV)
V
ILIM
= 0.5V
V
ILIM
= 2V
0
0.4
0.2
0.8
0.6
1.0
1.2
08124 162024
NO-LOAD SUPPLY CURRENT
vs. BATTERY INPUT VOLTAGE (SKIP MODE)
MAX1813 toc12
BATTERY INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
I
CC
+ I
DD
V
OUT
= 1.4V
SKP/SDN = V
CC
CODE = ZMODE = GND
I
BATT
0
5
10
15
20
25
30
35
40
084 12162024
NO-LOAD SUPPLY CURRENT
vs. BATTERY INPUT VOLTAGE (PWM MODE)
MAX1813 toc13
BATTERY INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
I
CC
+ I
DD
I
BATT
V
OUT
= 1.4V
SKP/SDN = FLOAT
CODE = ZMODE = GND
1000
10
10 100 1000
TRANSITION FREQUENCY vs. R
TIME
MAX1813 toc14
R
TIME
(k)
f
SLEW
(kHz)
100
T
A
= -40°C, 25°C, 85°C
Typical Operating Characteristics (continued)
(Circuit from Figure 1, components from Table 2, T
A
= +25°C, unless otherwise noted.)
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