Datasheet
MAX1953/MAX1954/MAX1957
Low-Cost, High-Frequency, Current-Mode PWM
Buck Controller
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
MAX1953
FREQUENCY vs. INPUT VOLTAGE
MAX1953 toc13
INPUT VOLTAGE (V)
FREQUENCY (MHz)
5.04.54.03.5
0.98
1.00
1.02
1.04
1.06
0.96
3.0 5.5
T
A
= -40
°
C
T
A
= +85°C
T
A
= +25°C
V
OUT
= 2.5V
MAX1954/MAX1957
FREQUENCY vs. INPUT VOLTAGE
MAX1953 toc14
INPUT VOLTAGE (V)
FREQUENCY (kHz)
5.04.54.03.5
275
280
285
290
295
300
305
310
315
320
270
3.0 5.5
T
A
= -40
°
C
T
A
= +25
°
C
T
A
= +85°C
V
OUT
= 1.25V
MAX1957
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX1953 toc08
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
210-1-2
1.20
1.25
1.30
1.35
1.15
-3 3
V
IN
= 5V
CIRCUIT OF FIGURE 3
MAX1954
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1953 toc11
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.04.54.03.5
2.47
2.48
2.49
2.50
2.51
2.52
2.46
3.0 5.5
I
LOAD
= 0
I
LOAD
= 5A
CIRCUIT OF FIGURE 2
MAX1957
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1953 toc12
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.04.54.03.5
1.21
1.23
1.25
1.27
1.29
1.19
3.0 5.5
I
LOAD
= 0
I
LOAD
= 3A
CIRCUIT OF FIGURE 3
MAX1953
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1953 toc09
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.04.54.03.5
2.45
2.50
2.55
2.60
2.40
3.0 5.5
I
LOAD
= 3A
I
LOAD
= 0
CIRCUIT OF FIGURE 1
MAX1954
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1953 toc10
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.04.54.03.5
1.66
1.68
1.70
1.72
1.74
1.76
1.64
3.0 5.5
I
LOAD
= 0
I
LOAD
= 5A
CIRCUIT OF FIGURE 2