ADI ADP2120ACPZ-1.2-R7

The ADP2119/ADP2120 are low quiescent current, synchronous, step-down dc-to-dc regulators in a compact 3 mm×3 mm LFCSP_WD package. Both devices use a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. Under light load conditions, they can be configured to operate in a pulse frequency modulation (PFM) mode, which reduces switching frequency to save power. The ADP2119/ADP2120 support input voltages from 2.3 V to 5.5 V. The output voltage can be adjusted from 0.6 V up to the input voltage (VIN) for the adjustable version, whereas the fixed output version is available in 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 require minimal external parts and provide a high efficiency solution with their integrated power switches, synchronous rectifiers, and internal compensation. Each IC draws less than 2 μA current from the input source when it is disabled. Other key features include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

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

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