ADP2165 5.5 V, 5 A, High Efficiency, Step-Down DC-to-DC Regulators with Output Tracking

The ADP2165/ADP2166 are high efficiency, current mode control, step-down dc-to-dc regulators with an integrated 19 mΩ high-side FET and a 15 mΩ synchronous rectified FET. The ADP2165/ADP2166 combine a small size, 4 mm × 4 mm LFCSP package with an accurate current limit, resulting in a smaller inductor size and a high power density, point of load solution.

Key features include precision enable, power-good monitor, and output voltage tracking to facilitate robust sequencing. The switching frequency can be programmed from 250 kHz to 1.4 MHz, or it can be fixed at 620 kHz or 1.2 MHz. The synchronization function allows the switching frequency to synchronize to an external clock, minimizing the electromagnetic interference (EMI) of the system.

The ADP2165/ADP2166 are designed to be extremely flexible with the addition of a minimal amount of external components to program soft start and control loop compensation.

The ADP2165/ADP2166 are supplied from an input voltage of 2.7 V to 5.5 V. Output voltage options include 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, or 1.0 V fixed outputs and adjustable options capable of supporting an output voltage range from 0.6 V to 90% of the input voltage. Protection features include undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD) for robust performance.

The ADP2165/ADP2166 operate over the −40°C to +125°C junction temperature range and are available in a 24-lead LFCSP_WQ package.

Applications
  • Point of load regulation
  • Communications and networking
  • High end consumer
  • Industrial, instrumentation, and healthcare
Features and Benefits
  • Integrated MOSFET
    High-side on resistance: 19 mΩ
    Low-side on resistance: 15 mΩ
  • Reference voltage: 0.6 V ± 1% over temperature range
  • Input voltage range: 2.7 V to 5.5 V
  • Current mode architecture
  • Switching frequency
    Fixed frequency: 620 kHz or 1.2 MHz
    Adjustable frequency: 250 kHz to 1.4 MHz
  • Synchronizes to external clock: 250 kHz to 1.4 MHz
  • Selectable synchronize phase shift: in phase or out of phase
  • External compensation
  • Programmable soft start
  • Startup into a precharged output
  • See datasheet for additional features
Power Management
Design Tools
Data Sheets
Documentnote
ADP2165/ADP2166: 5.5 V, 5 A/6 A, High Efficiency, Step-Down DC-to-DC Regulators with Output Tracking Data Sheet (Rev. A)PDF 681.62 K
User Guides
Documentnote
UG-565: Evaluating the ADP2165/ADP2166 Step-Down RegulatorPDF 348.5 K
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADP2165ACPZ-1.0-R7 Production24 ld LFCSP 4x4mm (2.5EP) REEL 1500-40 to 125C01.73Y
ADP2165ACPZ-1.2-R7 Production24 ld LFCSP 4x4mm (2.5EP) REEL 1500-40 to 125C01.73Y
ADP2165ACPZ-1.5-R7 Production24 ld LFCSP 4x4mm (2.5EP) REEL 1500-40 to 125C01.73Y
ADP2165ACPZ-1.8-R7 Production24 ld LFCSP 4x4mm (2.5EP) REEL 1500-40 to 125C01.73Y
ADP2165ACPZ-2.5-R7 Production24 ld LFCSP 4x4mm (2.5EP) REEL 1500-40 to 125C01.73Y
ADP2165ACPZ-3.3-R7 Production24 ld LFCSP 4x4mm (2.5EP) REEL 1500-40 to 125C01.73Y
ADP2165ACPZ-R7 Production24 ld LFCSP 4x4mm (2.5EP) REEL 1500-40 to 125C01.73Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
ADP2165-EVALZEvaluation Board60Y
ADP2166-EVALZEvaluation Board-1Y
ADP2165/ADP2166: 5.5 V, 5 A/6 A, High Efficiency, Step-Down DC-to-DC Regulators with Output Tracking Data Sheet (Rev. A) adp2165
ADP2165/ADP2166 Buck Designer Tool adp2165
UG-565: Evaluating the ADP2165/ADP2166 Step-Down Regulator adp2165