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Overview
| Optimized for multi-function, high performance battery-driven portable devices of all types, ROHM's DC/DC converters and controllers feature a wide input voltage range and automatic step-up/-down operation for reduced power consumption. High output efficiency is maintained across the entire input range. In addition, only one coil is used, and fewer parts are required than conventional Sepic systems, contributing to smaller power supply configurations. |
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| Boost/Buck Application |
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Features
Automatic step-up/-down switching function
DC/DC Converter (Internal FET type)
BD8301MUV
- Configure a cross converter with just a single coil
- Wide input voltage range: 2.5V to 5.5V
- Broad range of output voltages: 2.8V to 5.5V
- Large current output: 1A
- High efficiency
- Compact VQFN020V4040 package
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Automatic step-up/-down switching function
DC/DC Controller (External large current FET type)
BD8303MUV
- Configure a cross converter with just a single coil
- Wide input voltage range: 2.7V to 14V
- Compatible with large current FETs up to 5A
- Compact VQFN016V3030 package
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Feature 1 : Compact single coil design
| ROHM boost/buck automatic switching DC/DC regulators and controllers enable step-up/-down operation using a single coil for increased miniaturization. The controllers feature a form factor of only 3mmx3mm, while the regulators with built-in FET are only slightly larger – 4mmx4mm – making them ideal for compact applications of all types. |
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Feature 2 : High efficiency (96% at Vo=3.3V/Io=0.2A) across the entire input voltage range
ROHM automatic buck/boost switching DC/DC regulators feature an ON-resistance of only 100mΩ at the output stage for high efficiency and low loss, while both regulators and controllers minimize wiring resistance at the high current terminals Vcc and GND, reducing loss even further.
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| Terminal layout designed to minimize wiring resistance |
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Feature 3 : Simple 1ch voltage setting
| The advanced monolithic design enables automatic step-up/-down operation by setting the output voltage only once, simplifying application design significantly. |
Output Voltage Setting Method |
Applications
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Mobile phones |
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Digital cameras |
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Digital video cameras |
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Portable gaming equipment |
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Digital SLR cameras |
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Portable audio players |
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Single segment TVs |
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Portable navigation devices |
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Internet devices |
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IC recorders |
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Wearable computers |
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Portable DVD players |
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PDA |
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Electronic musical instruments |
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Portable GPS devices |
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Cordless phones |
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Portable web terminals |
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Communication equipment |
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Handheld printers |
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Digital photo frames |
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Electronic toys |
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Portable powered speakers |
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Electronic advertising equipment |
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and more |
Lineup
| Part No. |
Power Supply Voltage
[V] |
Output Voltage
[V] |
Output Current
[A] |
Transmission Frequency
[MHz] |
FET |
Ultra-compact Surface Mount Package
(mm) |
| NEWBD8301MUV |
2.5 to 5.5 |
2.8 to 5.2 |
1.0 |
Variable 0.5 to 1.5 |
Internal |
4.0×4.0×t 1.0 |
| NEWBD8303MUV |
2.7 to 14 |
1.8 to 12 |
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Variable 0.2 to 1.0 |
External |
3.0×3.0×t 1.0 |
Related Information
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