The ADP2325 is a full featured, dual output, step-down dc-to-dc
regulator based on a current mode architecture. The ADP2325
integrates two high-side power MOSFETs and two low-side drivers
for the external N-channel MOSFETs. The two pulse-width modulation
(PWM) channels can be configured to deliver dual 5 A
outputs or a parallel-to-single 10 A output. The regulator operates
from input voltages of 4.5 V to 20 V, and the output voltage can
be as low as 0.6 V.
The switching frequency can be programmed between 250 kHz
and 1.2 MHz, or synchronized to an external clock to minimize
interference in multirail applications. The dual PWM channels
run 180° out of phase, thereby reducing input current ripple as
well as reducing the size of the input capacitor.
The bidirectional synchronization pin can be programmed at
a 60°, 90°, or 120° phase shift, providing the possibility for a
stackable multiphase power solution.
The ADP2325 can be set to operate in pulse frequency modulation
(PFM) mode at a light load for higher efficiency or in forced
PWM for noise sensitive applications. External compensation
and soft start provide design flexibility. Independent enable
inputs and power-good outputs provide reliable power sequencing.
To enhance system reliability, the device includes undervoltage
lockout (UVLO), overvoltage protection (OVP), overcurrent protection,
and thermal shutdown.
The ADP2325 operates over the −40°C to +125°C junction
temperature range and is available in a 32-lead LFCSP_WQ
package.
Applications
- Communications infrastructure
- Networking and servers
- Industrial and instrumentation
- Healthcare and medical
- Intermediate power rail conversion
