Products
MAX1534
PRODUCTIONHigh-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers
High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers
- Part Models
- 2
- 1ku List Price
- Starting From $6.56
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Overview
- One Switching and Two Linear Regulators
- Switching Regulator
- +4.5V to +24V Input Voltage Range
- Over 95% Efficiency
- Up to 500mA Output Current
- Up to 200kHz Switching Frequency
- Fixed 5V or Adjustable Output Voltage
- Internal 0.5Ω PMOS Switch
- 100% Maximum Duty Cycle for Low-Dropout Operation
- Two Low-Dropout Linear Regulators
- Up to 160mA Output Current (Each)
- 3.3V/Adj Output Voltage for OUT1
- 1.8V/Adj Output Voltage for OUT2
- ±1.5% Accurate Output Voltage
- ±4% Accurate Shutdown for Low Battery Detection
- Thermal Shutdown Protection
- POK Output
- 1mW Typical Standby Power
The MAX1534 is a high-efficiency, triple-output power supply for keep-alive (always on) voltage rails. The 500mA buck regulator with an internal current-limited 0.5Ω PMOS steps down the battery or wall adapter supply rail to a fixed 5V or an adjustable output voltage. Two integrated low-voltage linear regulators follow this output and provide two independent preset output voltages of 3.3V and 1.8V, or adjustable output voltages.
The buck regulator utilizes a peak current-limit, pulse-frequency modulation (PFM) architecture for highest light-load efficiency to conserve battery life. High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. Operation to 100% duty cycle minimizes dropout voltage (250mV at 500mA).
The low-dropout linear regulators use an internal P-channel metal-oxide (PMOS) pass transistor to minimize supply current and deliver up to 160mA each of continuous current.
The MAX1534 includes a power-OK (POK) signal that indicates all outputs are in regulation. The 4% accurate threshold of the active-low SHDN input permits its use as a low-battery detector.
The MAX1534 is available in a small 16-pin thin QFN (4mm x 4mm) package, occupying 33% less board space than discrete solutions.
Applications
- 2 to 4 Li+ Cell Battery-Powered Devices
- Handheld Devices
- Keep-Alive Supplies
- Notebook and Subnotebook Computers
- Standby Supplies
- Wake On LAN®
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1534ETE+ | LFCSP | ||
| MAX1534ETE+T | LFCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX1534ETE+ | PRODUCTION | |
| MAX1534ETE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Switching Regulators & Controllers 1 | ||
| MAX1776 | PRODUCTION | 24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter |
Evaluation Kits
Evaluation Kit for the MAX1534
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