ADP2120ACPZ Analog Devices Integrated Circuit (Other) In Stock
ADP2120ACPZ is a high-efficiency synchronous step-down DC-DC regulator from Analog Devices with 2 MHz switching frequency, 1.2 A output current, and 2.3 V to 5.5 V input range in a compact LFCSP package. Delivers adjustable output from 0.8 V with PWM/PFM mode switching for optimized light-load efficiency. From $2.40 in stock worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 11
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ADP2120ACPZ?
- 2 MHz fixed switching frequency enables use of tiny 1 µH inductors and small ceramic capacitors, minimizing total solution size for handheld and wearable power supplies
- Automatic PWM/PFM mode switching maintains high efficiency from full 1.2 A load down to light loads below 10 mA, extending battery life in IoT and portable consumer devices
- 2.3 V to 5.5 V input range covers Li-ion battery (2.7 V to 4.2 V) and USB 5 V inputs with a single device, reducing SKU count in multi-input portable power designs
What is ADP2120ACPZ used for?
ADP2120ACPZ provides regulated low-voltage rails for portable electronics, wireless sensor nodes, and wearable devices powered by single-cell lithium-ion batteries or USB 5 V where a 2 MHz switching frequency reduces inductor and capacitor size to sub-millimeter values. Its automatic PWM/PFM mode transition sustains over 85% efficiency from 10 mA to 1.2 A, making it suitable for Bluetooth Low Energy modules, microcontrollers, and OLED display drivers that vary load current by two orders of magnitude during sleep and active states. The device also powers FPGA core voltages, DSP supplies, and mixed-signal circuits in industrial handheld instruments where a compact footprint and low radiated EMI from the 2 MHz frequency keep the design within FCC Class B limits.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for ADP2120ACPZ?
Compatible alternatives and drop-in replacements for ADP2120ACPZ:
Switching Regulator, Current-mode, 2.4A, 1380kHz Switching Freq-Max, PDSO10
Switching Regulator, Current-mode, 2.4A, 1380kHz Switching Freq-Max, PDSO10
Switching Regulator, Current-mode, 2.4A, 1380kHz Switching Freq-Max, PDSO10
Switching Regulator, Current-mode, 2.4A, 1380kHz Switching Freq-Max, PDSO10
Switching Regulator, Current-mode, 2.4A, 1380kHz Switching Freq-Max, PDSO10
Switching Regulator, Current-mode, 2.4A, 1380kHz Switching Freq-Max, PDSO10
Frequently Asked Questions
What switching frequency does ADP2120ACPZ use, and how does this affect passive component selection?
ADP2120ACPZ operates at a fixed 2 MHz switching frequency, which allows the use of a 1 µH power inductor and 10 µF ceramic output capacitor while maintaining stable regulation at 1.2 A; compared to a 300 kHz design, these passives are roughly 60% smaller in footprint, reducing the total power-stage area to under 25 mm² on a 4-layer PCB.
How does ADP2120ACPZ maintain efficiency at light loads typical of IoT sleep modes?
ADP2120ACPZ automatically transitions from fixed-frequency PWM mode at loads above approximately 100 mA to pulse-frequency modulation (PFM) mode at lighter loads, reducing switching losses and gate-drive current; in PFM mode the quiescent current drops to under 50 µA, sustaining efficiencies above 80% even at 1 mA load, which is critical for IoT nodes that draw under 5 mA during sleep intervals lasting several seconds.
What input voltage range does ADP2120ACPZ support, and can it regulate from a fully discharged Li-ion cell?
ADP2120ACPZ accepts input voltages from 2.3 V to 5.5 V, covering a single Li-ion cell from its charged peak of 4.2 V down to its nominal 3.6 V and toward its cutoff at approximately 2.7 V; the 2.3 V minimum ensures the regulator continues operating through the cell's entire usable discharge curve and during cold-temperature conditions where terminal voltage sags below 3.0 V at high load.
What minimum output voltage can ADP2120ACPZ regulate to, making it suitable for sub-1 V core supplies?
ADP2120ACPZ can be adjusted down to a 0.8 V output voltage using an external resistor-divider feedback network, enabling it to supply FPGA core voltages at 0.9 V or 1.0 V and DSP rails at 1.05 V from a 3.3 V or 5 V input, with the 1.2 A current rating sufficient for mid-range FPGAs and processor cores drawing up to 1 A at full utilization.
How does ADP2120ACPZ's compact package affect PCB layout in space-constrained portable products?
ADP2120ACPZ comes in a LFCSP (lead-frame chip-scale) package with a footprint of approximately 2 mm × 2 mm and 0.5 mm pitch, occupying roughly 4 mm² — small enough to fit within a smartwatch power-management sub-board alongside a 1 µH inductor and two 10 µF 0402 capacitors in a total solution area of under 30 mm², which is about 3× smaller than an equivalent SOIC-8 solution.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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