ADI ADP2120ACPZ-1.5-R7

The ADP2119/ADP2120 are low quiescent current, synchronous step-down DC-DC regulators housed in a compact 3 mm x 3 mm LFCSP_WD package. Both devices employ a current-mode, constant-frequency PWM control scheme, delivering excellent stability and transient response performance. Under light-load conditions, these devices can be configured to operate in PFM mode, reducing switching frequency and saving power.

The ADP2119/ADP2120 support input voltages ranging from 2.3 V to 5.5 V. The adjustable version allows output voltage to be set anywhere from 0.6 V to VIN, while fixed-output versions offer preset output voltage options of 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V. The ADP2119/ADP2120 integrate the power switch, synchronous rectifier, and internal compensation, requiring minimal external components to deliver a high-efficiency solution. The IC draws less than 2 μA from the input supply when disabled. Additional key features include UVLO, integrated soft-start to limit inrush current during startup, OVP, OCP, and TSD.

The ADP2119/ADP2120 are step-down DC-DC regulators based on a fixed-frequency, peak current-mode architecture with an integrated high-side switch and low-side synchronous rectifier. Operating at a high switching frequency and housed in a 10-lead, 3 mm x 3 mm LFCSP_WD package, they provide a compact step-down DC-DC regulator solution. The integrated high-side switch (P-channel MOSFET) and synchronous rectifier (N-channel MOSFET) deliver high efficiency at medium to full load, while light-load efficiency is improved through PFM mode.

The ADP2119/ADP2120 support input voltages from 2.3 V to 5.5 V and can regulate output voltage down to 0.6 V. Preset output voltage options of 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V are also available.

• Continuous output current: ADP2119: 2 A, ADP2120: 1.25 A
• 145 mΩ and 70 mΩ integrated MOSFETs
• Input voltage range: 2.3 V to 5.5 V
• Output voltage range: 0.6 V to Vin
• Output accuracy: ±1.5%
• 1.2 MHz fixed switching frequency
• Synchronizable between 1 MHz and 2 MHz
• Selectable PWM or PFM operating mode
• Current-mode architecture
• Precision threshold enable input
• Power good indication
• Voltage tracking
• Integrated soft-start
• Internal compensation
• Startup with pre-biased output
• UVLO, overvoltage protection, overcurrent protection, and thermal shutdown
• 3 mm×3 mm, 10-lead LFCSP_WD package
• Supported by ADIsimPower design tool

• Point-of-load conversion
• Telecom and networking equipment
• Industrial and instrumentation
• Consumer electronics
• Medical applications