中文
EnglishJTM1001-Synchronous Buck DC/DC Converter
摘要：JTM1001-Synchronous Buck DC/DC Converter
Features
Ø Up to 95% Efficiency
Ø Current Mode Operation for Excellent Line and Load Transient Response
Ø 700mA Output Current
Ø Low Quiescent Current: 200μA
Ø Output Voltage: 0.6V ～ 5.5V
Ø Automatic PWM/PFM Mode Switching
Ø No Schottky Diode Required
Ø Frequency Operation: 1.0MHz for Fixed Output Voltage and 1.4MHz for Adjustable Output Voltage
Ø Short-Circuit Protection
Ø Shutdown Quiescent Current: <1μA
Ø Low Profile TSOT/ SOT-23-5L Package (lead-free packaging is now available)
Description
The
JTM1001 is high efficiency synchronous, PWM step-down DC/DC converters
working under an input voltage range from 2.2V to 5.5V. This feature
makes the JTM1001 suitable for single Li-Lon battery-powered
applications. 100% duty cycle capability extends battery life in
portable devices, while the quiescent current is 200μA with no load, and
drops to <1μA in shutdown.
The
internal synchronous switch is desired to increase efficiency without
an external Schottky diode. The 1.0MHz/1.4MHz switching frequency allows
the using of tiny, low profile inductors and ceramic capacitors, which
minimized overall solution footprint.
The JTM1001 converters are available in the industry standard TSOT/SOT-23-5L power packages (or upon request).
Applications
Ø Digital cameras and MP3
Ø Palmtop computers / PDAs
Ø Cellular phones
Ø Wireless handsets and DSL modems
Ø Portable media players
Ø PC cards
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