The ADP2441/ADP2442ACPZ-R7 is a constant frequency, current mode control,synchronous, step-down, dc-to-dc regulator that is capable ofdriving loads of up to 1 A with excellent line and load regulationcharacteristics. The ADP2442ACPZ-R7 operates with a wide input voltagerange from 4.5 V to 36 V, which makes it ideal for regulating powerfrom a wide variety of sources. In addition, the ADP2442ACPZ-R7 hasvery low minimum on time (50 ns) and is, therefore, suitable forapplications requiring a very high step-down ratio.
The output voltage can be adjusted from 0.6 V to 0.9 × VIN.High efficiency is obtained with integrated low resistanceN-channel MOSFETs for both high-side and low-side devices.
The switching frequency is adjustable from 300 kHz to 1 MHz withan external resistor. The ADP2442ACPZ-R7 also has an accurate power-good(PGOOD) open-drain output signal.
The ADP2442ACPZ-R7 offers the flexibility of external clock synchronization.The switching frequency can be synchronized to an externalclock, applied to the SYNC/MODE pin. The ADP2442ACPZ-R7 can alsobe configured to operate in the forced fixed frequency mode forlow EMI or power saving mode to reduce the switching losses atlight load.
The ADP2442ACPZ-R7 uses hiccup mode to protect the IC from shortcircuits or from overcurrent conditions on the output. The internalsoft start limits inrush current during startup for a wide variety ofload capacitances. Other key features include input undervoltagelockout (UVLO), thermal shutdown (TSD), and precision enable(EN), which can also be used as a logic level shutdown input.
The ADP2442ACPZ-R7 is available in a 3 mm × 3 mm, 12-lead LFCSPpackage and is rated for a junction temperature range from−40°C to +125°C.
Feature
- Wide input voltage range of 4.5 V to 36 V
- Low minimum on time of 50 ns
- Maximum load current of 1 A
- High efficiency of up to 94%
- Adjustable output down to 0.6 V
- ±1% output voltage accuracy
- Adjustable switching frequency of 300 kHz to 1 MHz
- External synchronization from 300 kHz to 1 MHz
- Pulse skip mode or Forced fixed frequency mode
- Precision enable input pin
- Open-drain power good
- Reference similar productwith programmable soft-start and tracking.
- See data sheet for additional features
Applications
- Point of load applications
- Distributed power systems
- Industrial control supplies
- Standard rail conversion to 24 V/12 V/5 V/3.3 V
(Picture: Pinout)
