Overview
The ADP2121ACBZ-1.8-R7 is a high-efficiency, synchronous step-down DC-to-DC converter produced by Analog Devices Inc. This component is optimized for portable applications where board area and battery life are critical constraints. It operates from an input voltage range of 2.3 V to 5.5 V and provides up to 600 mA of continuous output current at fixed output voltages of 1.8 V, 1.82 V, 1.85 V, 1.875 V, and 2.3 V. The device features a high operating frequency of 6 MHz, enabling the use of tiny ceramic inductors and capacitors, which helps in reducing the overall board size.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range | VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V | 2.3 | 5.5 | V | |
| Input Voltage Range | VOUT = 2.3 V | 2.9 | 5.5 | V | |
| Quiescent Current | Auto mode, no load, not switching, TA = −40°C to 85°C | 36 | 56 | µA | |
| Shutdown Current | VOUT = 1.8 V, 1.82 V, 1.85 V, 1.875 V, VEN = 0 V, TA = −40°C to 85°C | 0.3 | 1 | µA | |
| Shutdown Current | VOUT = 2.3 V, VEN = 0 V, TA = −40°C to 85°C | 0.4 | 1.5 | µA | |
| Maximum Guaranteed Load Current | VIN = 2.7 V to 5.5 V | 600 | mA | ||
| Operating Frequency | 6 | MHz | |||
| Peak Efficiency | 92% | % |
Key Features
- High efficiency with a peak efficiency of 92%.
- Operating frequency of 6 MHz, allowing the use of tiny ceramic inductors and capacitors.
- Automatic power-saving mode with pulse-frequency modulation (PFM) for light loads and pulse-width modulation (PWM) for high load currents.
- Internal synchronous rectifier and internal compensation.
- Internal soft start to limit inrush current at startup.
- Output to ground short-circuit protection and cycle-by-cycle current-limit protection.
- Enable/shutdown logic input and undervoltage lockout (UVLO).
- Thermal shutdown protection.
- Ultrasmall 6-ball, 0.4 mm pitch, 1.17 mm^2 WLCSP package.
Applications
- Mobile phones.
- Digital cameras.
- Digital audio equipment.
- Portable equipment.
Q & A
- What is the input voltage range of the ADP2121ACBZ-1.8-R7?
The input voltage range is from 2.3 V to 5.5 V for output voltages of 1.8 V, 1.82 V, 1.85 V, and 1.875 V, and from 2.9 V to 5.5 V for an output voltage of 2.3 V.
- What is the maximum guaranteed load current of the ADP2121ACBZ-1.8-R7?
The maximum guaranteed load current is 600 mA for input voltages from 2.7 V to 5.5 V.
- What is the operating frequency of the ADP2121ACBZ-1.8-R7?
The operating frequency is 6 MHz.
- What are the key power-saving features of the ADP2121ACBZ-1.8-R7?
The device features automatic power-saving mode with PFM for light loads and PWM for high load currents, as well as a low quiescent current in auto mode.
- What type of package does the ADP2121ACBZ-1.8-R7 come in?
The device comes in an ultrasmall 6-ball, 0.4 mm pitch, 1.17 mm^2 WLCSP package.
- What are some of the protection features of the ADP2121ACBZ-1.8-R7?
The device includes output to ground short-circuit protection, cycle-by-cycle current-limit protection, undervoltage lockout (UVLO), and thermal shutdown protection).
- What are the typical applications of the ADP2121ACBZ-1.8-R7?
The device is typically used in mobile phones, digital cameras, digital audio equipment, and other portable equipment).
- How does the ADP2121ACBZ-1.8-R7 manage efficiency at different load conditions?
The device uses PWM mode for high load currents and PFM mode for light loads to optimize efficiency and battery life).
- What is the shutdown current of the ADP2121ACBZ-1.8-R7?
The shutdown current is typically 0.3 µA for output voltages other than 2.3 V and 0.4 µA for an output voltage of 2.3 V).
- Does the ADP2121ACBZ-1.8-R7 have internal compensation and soft start features?
Yes, the device includes internal compensation and internal soft start to limit inrush current at startup).
