Overview
The ADP1111ARZ-5-REEL, produced by Analog Devices Inc., is a versatile micropower step-up/step-down switching regulator. This device is part of a family of regulators that can operate in both step-up and step-down modes, making it highly adaptable for various power management needs. The ADP1111 can be configured with just a few external components, making it a compact and efficient solution for a wide range of applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Voltage (Step-Up Mode) | 2.0 | 12.6 | V | ||
| Input Voltage (Step-Down Mode) | 30.0 | V | |||
| Quiescent Current (Switch Off) | 300 | 500 | μA | ||
| Output Voltage (ADP1111-5) | 4.75 | 5.00 | 5.25 | V | |
| Oscillator Frequency | 54 | 72 | 88 | kHz | |
| Duty Cycle (Full Load) | 43 | 50 | 65 | % | |
| Output Current | 400 | mA |
Key Features
- Operates from 2 V to 30 V input voltage range, depending on the mode.
- 72 kHz frequency operation.
- Utilizes surface mount inductors and requires very few external components.
- Operates in step-up, step-down, or inverting mode.
- Low battery detector and user-adjustable current limit.
- Internal 1 A power switch.
- Fixed or adjustable output voltage options.
- Available in 8-pin DIP or SO-8 package.
Applications
- 3 V to 5 V, 5 V to 12 V step-up converters.
- 9 V to 5 V, 12 V to 5 V step-down converters.
- Laptop and palmtop computers.
- Cellular telephones.
- Flash memory VPP generators.
- Remote controls and peripherals.
- Add-on cards.
- Battery backup supplies and uninterruptible power supplies.
- Portable instruments.
Q & A
- What is the input voltage range for the ADP1111 in step-up mode?
The input voltage range for the ADP1111 in step-up mode is from 2 V to 12.6 V.
- What is the maximum input voltage for the ADP1111 in step-down mode?
The maximum input voltage for the ADP1111 in step-down mode is 30 V.
- What is the typical oscillator frequency of the ADP1111?
The typical oscillator frequency of the ADP1111 is 72 kHz.
- What is the maximum output current of the ADP1111ARZ-5-REEL?
The maximum output current of the ADP1111ARZ-5-REEL is 400 mA.
- In what packages is the ADP1111 available?
The ADP1111 is available in 8-pin DIP or SO-8 packages.
- Can the ADP1111 operate in different modes?
- What is the purpose of the low battery detector in the ADP1111?
The low battery detector allows for monitoring and managing low battery conditions, which can be crucial in battery-powered devices.
- How is the output voltage of the ADP1111 adjusted?
The output voltage of the ADP1111 can be adjusted using external resistors R1 and R2, with the formula VOUT = 1.25V * (1 + R2/R1).
- Is the ADP1111 still in production?
No, the ADP1111 has been discontinued by Analog Devices Inc. as per their product discontinuance notice in January 2014.
- What are some common applications of the ADP1111?
The ADP1111 is commonly used in laptop and palmtop computers, cellular telephones, flash memory VPP generators, remote controls, and other portable devices.
