Overview
The ADP2121ACBZ-1.82R7 is a high-frequency, low quiescent current step-down DC-to-DC converter produced by Analog Devices Inc. This device is optimized for portable applications where board area and battery life are critical. It operates at a 6 MHz frequency, enabling the use of tiny ceramic inductors and capacitors, which helps in reducing the overall size of the circuit. The ADP2121 features synchronous rectification, which improves efficiency and reduces the number of external components required. It supports fixed output voltages of 1.8 V, 1.82 V, 1.85 V, 1.875 V, and 2.3 V, with a maximum guaranteed load current of 600 mA at input voltages ranging from 2.3 V to 5.5 V.
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) | TA = −40°C to 85°C | 36 | 56 | μA | |
| Quiescent Current (PWM mode, no load) | 10 | mA | |||
| Shutdown Current | VEN = 0 V, TA = −40°C to 85°C | 0.3 | 1 | μA | |
| Output Voltage | 1.82 | V | |||
| Maximum Guaranteed Load Current | VIN = 2.7 V to 5.5 V | 600 | mA | ||
| Operating Frequency | 6 | MHz |
Key Features
- High efficiency with peak efficiency up to 92%.
- 6 MHz operating frequency, allowing the use of tiny ceramic inductors and capacitors.
- Synchronous rectification for improved efficiency and reduced external component count.
- Automatic power-saving mode using pulse-frequency modulation (PFM) for light loads.
- Fixed PWM mode for improved transient performance.
- Internal compensation and soft start.
- Output to ground short-circuit protection and cycle-by-cycle current-limit protection.
- Enable/shutdown logic input and undervoltage lockout.
- 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 electronic devices.
Q & A
- What is the input voltage range for the ADP2121ACBZ-1.82R7?
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 the 2.3 V output voltage. - What is the maximum guaranteed load current of the ADP2121ACBZ-1.82R7?
The maximum guaranteed load current is 600 mA at input voltages ranging from 2.7 V to 5.5 V. - What is the operating frequency of the ADP2121ACBZ-1.82R7?
The operating frequency is 6 MHz. - Does the ADP2121ACBZ-1.82R7 support automatic power-saving modes?
Yes, it supports automatic power-saving modes using pulse-frequency modulation (PFM) for light loads. - What type of package does the ADP2121ACBZ-1.82R7 come in?
The device comes in an ultrasmall 6-ball, 0.4 mm pitch, 1.17 mm^2 WLCSP package. - What are some key protection features of the ADP2121ACBZ-1.82R7?
Key protection features include output to ground short-circuit protection, cycle-by-cycle current-limit protection, undervoltage lockout, and thermal shutdown protection. - What is the typical quiescent current in auto mode for the ADP2121ACBZ-1.82R7?
The typical quiescent current in auto mode is 36 μA. - Can the ADP2121ACBZ-1.82R7 operate in forced PWM mode?
Yes, it can operate in forced PWM mode for improved transient performance. - What are some typical applications for the ADP2121ACBZ-1.82R7?
Typical applications include mobile phones, digital cameras, digital audio equipment, and other portable electronic devices. - Does the ADP2121ACBZ-1.82R7 have internal compensation and soft start?
Yes, it has internal compensation and soft start.
