Overview
The MAX1630 series, produced by Maxim Integrated (now part of Analog Devices Inc.), are buck-topology, step-down, switch-mode power-supply controllers designed for generating logic-supply voltages in battery-powered systems. These devices are highly efficient and feature multiple output voltages, making them suitable for a variety of applications, including mobile communications and computing devices.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Input Voltage Range | 4.2V to 30V | V |
| Output Voltages | 2.5V to 5.5V (adjustable), 3.3V, 5V, 12V | V |
| Output Currents | 3A (3.3V and 5V), 120mA (12V) | A |
| Efficiency | Up to 96% | % |
| Operating Frequency | 200kHz/300kHz | kHz |
| Quiescent Power | 2.5mW (typical) | mW |
| Shutdown Current | 4µA (typical) | µA |
| Package | 28-Pin SSOP |
Key Features
- High efficiency up to 96%
- Wide input voltage range: +4.2V to +30V
- Dual adjustable outputs from 2.5V to 5.5V
- Selectable 3.3V and 5V fixed or adjustable outputs
- 12V linear regulator
- Adjustable secondary feedback (MAX1631/MAX1634)
- 5V/50mA linear regulator output
- Precision 2.5V reference output
- Programmable power-up sequencing
- Power-good (active-low RESET) output
- Output overvoltage protection and undervoltage shutdown
- Low-noise, fixed-frequency operation
- Low-dropout, 99% duty-factor operation
Applications
- Notebook and subnotebook computers
- PDAs and mobile communicators
- Desktop CPU local DC-DC converters
Q & A
- What is the input voltage range of the MAX1630 series?
The input voltage range is from +4.2V to +30V.
- What are the available output voltages for the MAX1630 series?
The devices offer adjustable outputs from 2.5V to 5.5V, as well as fixed 3.3V and 5V outputs.
- What is the efficiency of the MAX1630 series?
The efficiency can be up to 96%.
- What is the operating frequency of the MAX1630 series?
The operating frequency is 200kHz or 300kHz.
- What is the quiescent power consumption of the MAX1630 series?
The typical quiescent power consumption is 2.5mW.
- What is the shutdown current of the MAX1630 series?
The typical shutdown current is 4µA.
- What kind of protection features do the MAX1630 series have?
The devices feature output overvoltage protection and undervoltage shutdown.
- What is the purpose of the secondary feedback input (SECFB) in MAX1631/MAX1634?
The SECFB allows for adjusting the secondary winding voltage regulation point with an external resistor divider.
- What are some common applications for the MAX1630 series?
Common applications include notebook and subnotebook computers, PDAs, mobile communicators, and desktop CPU local DC-DC converters.
- What package type is the MAX1630 series available in?
The devices are available in a 28-Pin SSOP package.
