Device converts battery or bus voltage to its system requirement; operates over many input/output conditions
CHANDLER, Ariz. - Feb. 18, 2003 - Microchip Technology (Nasdaq:MCHP) today announced a 500mA, DC-to-DC synchronous step-down converter that operates over a multitude of input and output conditions. This gives designers an efficient method of transforming battery or bus voltage to its system requirements.
Used in applications such as cellular phones, PDAs, digital cameras and USB-powered
devices, the MCP1601 operates in three modes and automatically switches among
them to follow a maximum efficiency curve for the given input/output (I/O) condition.
The three operating modes include: pulse width modulation (PWM), for normal
medium-to-high load conditions; pulse frequency modulation (PFM), for light
or no-load conditions over an extended time; and low-drop-out mode (LDO), for
cases when the input approaches the output voltage.
This DC-to-DC converter also has integrated safety features, such as over-current,
over-temperature and under-voltage lockout (UVLO) protection to safeguard the
converter circuitry. Additionally, the device has an externally controllable
shutdown mechanism to minimize drain current during system inactivity. Moreover,
the MCP1601 can be implemented with a complete ceramic capacitor solution eliminating
the need for larger tantalum caps.
"The MCP1601 provides a very efficient and cost effective method of converting
battery or bus voltages to a desired lower voltage," said Jim Mack, marketing
manager for Microchip's Analog and Interface Products Division. "In
addition, it offers several self-protection mechanisms that provide an additional
level of security for our customers."
The input voltage on this device ranges from 2.7 to 5.5 volts. The output voltage
range is from 0.9V to as high as VIN for the input voltage, while the shutdown
current is typically less than 0.1µA. It has a load current capability
of up to 500mA continuous and will operate at 100 percent duty cycle or LDO
mode when the input voltage approaches the output voltage. The UVLO voltage
ranges between 2.4 and 2.7 volts.
Available in an 8-pin MSOP, pricing for this device is $1.85 in 1 000-piece units. Samples and volume-production quantities are available today. For additional information or pricing on these devices, contact any Microchip sales representative or authorized worldwide distributor or visit www.microchip.com.
You may have to register before you can post comments and get full access to forum.