ADI claims DC-DC converter has highest efficiency
The ADP2384 is a synchronous step-down, dc-to-dc regulator with an integrated 44 mΩ, high-side power MOSFET and an 11.6 mΩ, synchronous rectifier MOSFET to provide a high efficiency solution in a compact 4 mm × 4 mm LFCSP package. This device uses a peak current mode, constant frequency pulse-width-modulation (PWM) control scheme for excellent stability and transient response. The switching frequency of the ADP2384 can be programmed between 200 kHz to 1.4 MHz. To minimize system noise, the synchronization function allows the switching frequency to be synchronized to an external clock.
The ADP2384 requires minimal external components and operates from an input voltage of 4.5 V to 20 V. The output voltage can be adjusted from 0.6 V to 90% of the input voltage and delivers up to 4 A of continuous current. Each IC draws less than 100 μA current from the input source when it is disabled.
This regulator targets high performance applications that require high efficiency and design flexibility. External compensation and an adjustable soft start function provide design flexibility. The power-good output and precision enable input provide simple and reliable power sequencing.
Other key features include undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), short-circuit protection (SCP) and thermal shutdown (TSD).
- Communications infrastructure
- Networking and servers
- Industrial and instrumentation
- Healthcare and medical
- Intermediate power rail conversion
- DC-to-dc point-of-load applications
FEATURES and BENEFITS
- Input voltage: 4.5 V to 20 V
- Integrated MOSFET:
44 mΩ/11.6 mΩ
- Reference voltage:
0.6 V ± 1%
- Continuous output current:
- Programmable switching frequency:
200 kHz to 1.4 MHz
- Synchronizes to external clock: 200 kHz to 1.4 MHz
- 180° out of phase clock synchronization
- Precision enable and power good
- External compensation
- Internal soft start with external adjustable option
- Startup into a precharged output
- Supported by ADIsimPower design tool
Analog Devices has introduced 6A DC-DC voltage regulators with a conversion efficiency of greater than 95%.
The ADP2384/86 regulators have an input voltage range of 4.5V to 20V and an output range from 0.6V up to 18V with 1% voltage accuracy.
There is a precision-enable input and a power-good output to help the start-up sequence.
The switching frequency of the regulators can be synchronised to an external clock to eliminate beat frequencies between regulators.
The ADP2384/86 operate over the ?40°C to +125°C junction temperature range and are available in 4x4mm 24-lead LFCSP packages.
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