Datasheet

Maxim Integrated │ 9
MAX17503 4.5V-60V, 2.5A, High-Efciency,
Synchronous Step-Down DC-DC Converter
With Internal Compensation
www.maximintegrated.com
Typical Operating Characteristics (continued)
(V
IN
= V
EN/UVLO
= 24V, V
PGND
= V
SGND
= 0V, C
VIN
= C
VCC
= 2.2µF, C
BST
= 0.1µF, C
SS
=5600pF,RT=MODE=open,T
A
= T
J
= -40ºC
to +125ºC, unless otherwise noted. Typical values are at T
A
=+25ºC.AllvoltagesarereferencedtoGND,unlessotherwisenoted.)
5V OUTPUT, OVERLOAD PROTECTION,
FIGURE 4a CIRCUIT
MAX17503 toc30
I
OUT
1A/div
V
OUT
500mV/div
20ms/div
5V OUTPUT, 2.5A LOAD CURRENT
BODE PLOT,
FIGURE 4a CIRCUIT
FREQUENCY (Hz)
GAIN (dB)
10k
-30
-20
-10
0
10
20
30
40
50
-40
-60
-40
-20
0
20
40
60
80
100
-80
1k
2 4 6 8 1 2 4 6 8 1 2
100k
MAX17503 toc32
PHASE (°)
CROSSOVER
FREQUENCY = 58.2kHz
PHASE MARGIN = 63.4°
GAIN
PHASE
-50 -100
5V OUTPUT, APPLICATION OF
EXTERNAL CLOCK AT 700kHz,
FIGURE 4a CIRCUIT
MAX17503 toc31
V
SYNC
2V/div
V
LX
10V/div
2µs/div
MODE = SGND
5V OUTPUT, 2.5A LOAD CURRENT
BODE PLOT,
FIGURE 4b CIRCUIT
FREQUENCY (Hz)
GAIN (dB)
10k
-30
-20
-10
0
10
20
30
40
50
-40
-60
-40
-20
0
20
40
60
80
100
-80
1k
2 4 6 8 1 2 4 6 8 1 2
100k
MAX17503 toc33
PHASE (°)
CROSSOVER
FREQUENCY = 62.5kHz
PHASE MARGIN = 61.2°
GAIN
PHASE
60 120