Datasheet

MAX17503 4.5V-60V, 2.5A, High-Efciency,
Synchronous Step-Down DC-DC Converter
With Internal Compensation
Maxim Integrated │ 7
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, 2.5A LOAD CURRENT
STEADY-STATE SWITCHING WAVEFORMS,
FIGURE 4a CIRCUIT
MAX17503 toc18
I
LX
1A/div
V
LX
10V/div
V
OUT
(AC)
50mV/div
1µs/div
5V OUTPUT, PFM MODE, 25mA LOAD
STEADY-STATE SWITCHING WAVEFORMS,
FIGURE 4a CIRCUIT
MAX17503 toc20
I
LX
500mA/div
V
LX
10V/div
V
OUT
(AC)
100mV/div
10µs/div
MODE = OPEN
5V OUTPUT, PWM MODE
(LOAD CURRENT STEPPED FROM 1A TO 2A),
FIGURE 4a CIRCUIT
MAX17503 toc22
I
OUT
1A/div
V
OUT
(AC)
100mV/div
40µs/div
MODE = SGND
5V OUTPUT, PWM MODE, NO LOAD
STEADY-STATE SWITCHING WAVEFORMS,
FIGURE 4a CIRCUIT
MAX17503 toc19
I
LX
500mA/div
V
LX
10V/div
V
OUT
(AC)
50mV/div
1µs/div
MODE = SGND
5V OUTPUT, DCM MODE, 25mA LOAD
STEADY-STATE SWITCHING WAVEFORMS,
FIGURE 4a CIRCUIT
MAX17503 toc21
I
LX
200mA/div
V
LX
10V/div
V
OUT
(AC)
20mV/div
1µs/div
MODE = V
CC
3.3V OUTPUT, PWM MODE
(LOAD CURRENT STEPPED FROM 1A TO 2A),
FIGURE 4b CIRCUIT
MAX17503 toc23
I
OUT
1A/div
V
OUT
(AC)
50mV/div
40µs/div
MODE = SGND