Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8560, MAX8561 and MAX8562
Edited by the Electronicstalk Editorial Team on 25 August 2003
High-efficiency convertors shrink for
handset use
A new family of 4MHz high-efficiency step-down DC/DC convertors provide up to 500mA of continuous current at output voltages as low as 0.6V in tiny SOT23 and thin DFN packages.
The MAX8560, MAX8561 and MAX8562 are the first 4MHz, high-efficiency, step-down DC/DC convertors to provide up to 500mA of continuous current at output voltages as low as 0.6V in tiny SOT23 and thin DFN packages These devices are optimised for applications where small size and efficiency are critical
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX8560/1/2 use a proprietary, hysteric PWM scheme that switches at up to 4MHz.
This user-adjustable switching frequency scheme allows the use of a 1mm-high, 1uH inductor and tiny low-cost ceramic capacitors, providing a complete solution of less than 19.5mm2.
No-load quiescent current is only 40uA.
Low output ripple minimises the impact on the RF operation of portable communicators, including cellphones, smartphones and PDA phones.
These devices also include internal soft-start with zero inrush current.
The MAX8560/1/2 have an input range of 2.7 to 5.5V for single-cell lithium-ion (Li+), multicell alkaline, or NiMH battery power applications.
The MAX8561 features logic-controlled output-voltage selection, providing two output voltages for dynamic-voltage management (DVM) for the CPU core supply.
To minimise power loss through the inductor in the power-amplifier applications, the MAX8562 drives an external bypass P-channel FET when in high-power mode.
The MAX8560 is packaged in a 6-pin SOT23, and the MAX8561 and MAX8562 are packaged in 3 x 3mm, 8-pin, thin DFNs.
Prices start at $1.85 for the MAX8560 and $2.05 for the MAX8561 and MAX8562 (1000-up, FOB USA).
The MAX8560EVKIT evaluation kit is available to speed designs.
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