New ROHM Semiconductor Switching Regulators Meet High Operating Voltage, Extended Temperature, and Small Layout Requirements

Enabling ultra-high power efficiency at a competitive price point, ROHM's new DC/DC regulators are optimized for a broad range of industrial and consumer high performance power supplies

Santa Clara, Calif., March 18, 2014 – ROHM Semiconductor today introduced two new switching regulator series designed to meet the high operating voltage, extended temperature, and small layout requirements demanded of today's high performance, space-constrained power supply applications. Delivering extremely high power efficiency over a wide current load, ROHM's new switching regulators are optimized to support a comprehensive range of industrial, consumer and battery-powered equipment power supplies. As users demand increased performance from smaller and smaller power supply applications, ROHM's expanded DC/DC switching regulator line offers significant efficiency advantages over other voltage regulators and permits designers to further shrink board sizes.

ROHM's BD9G101G DC/DC converter features a high and wide input voltage range (VCC=6V~42V), an integrated internal high-side 42V power MOSFET, and provides 0.5A of DC output.

ROHM's high-efficiency 6MHz synchronous step-down switching regulator BU9000xGWZ utilizes an ultra-low current pulse-frequency modulation (PFM) mode and provides up to 1.0A of load current with an input voltage range from 4.0V to 5.5V.

"ROHM's new switching regulators deliver today's in-demand integrated features and smaller sizes, allowing designers to reduce space by more than 20%. And all this value comes at a more competitive price," said Mark Aaldering, Sr. Director of Technical Marketing at ROHM Semiconductor. "With increased power efficiency and wide voltage input capabilities, our customers can implement reduced power and energy saving features that improve system reliability for a broader range of applications."

Feature Sets in Detail:
The BD9G101G gives power supply designers a wide operating voltage range from 6 to 42V with extended operating temperature (-40 to 105C) in a very small SOT23 (SSOP6) package that measures only 2.9x2.8x1.25mm. Its fixed 1.5MHz operating frequency allows the use of small inductors and ceramic capacitors. With a 45V/800mΩ internal power MOSFET that delivers greater efficiency, the BD9G101G delivers 0.75V±1.5% feedback pin voltage and integrates overcurrent protection, under voltage lock out and thermal shutdown functions.

With built-in FETs that allow designers to accommodate space-constrained board layouts, ROHM's BU9000xGWZ is offered in an ultra-compact UCSP35L1 (1.3x0.9x0.4mm) package. This new switching regulator features 6 MHz high switching frequency for fast transient response and automatic Pulse Frequency Modulation (PFM)/Pulse Width Modulation (PWM) mode switching operation to enable high power efficiency over both light (PFM mode) and heavy (PWM mode) loads. Designers with widely varying loads can use PFM to achieve increased efficiency at lighter load currents. It also features internal overcurrent protection, under voltage lock out and thermal shutdown circuits.

Pricing: US$0.63 (BD9G101G)
(3000pcs) US$0.76 (BU9000xGWZ)
Availability: Mass Production Now
Delivery: 14 weeks ARO

  • Battery-Powered, Secondary POL, Distributed Power Supplies
  • Power supplies in:
    • LCD TVs
    • Broadband/Communications Equipment
    • Printers
    • Notebook/Tablet PCs, Servers
    • Gaming Equipment
    • Storage Devices (HDDs/SSDs)

Evaluation boards supporting the two products are available through distribution. For more information on ROHM's expanded line of switching regulators, please click here.

About ROHM Semiconductor
ROHM Semiconductor is an industry leader in system LSI, discrete components and module products. ROHM's proprietary production system, which includes some of the most advanced automation technology, is a major factor in keeping it at the forefront of the electronic component manufacturing industry. In addition to its development of electronic components, ROHM has also developed its own production system so that it can focus on specific aspects of customized product development. ROHM employs highly skilled engineers with expertise in all aspects of design, development and production. This allows ROHM the flexibility to take on a wide range of applications and projects and the capability to serve valuable clients in the automotive, telecommunication and computer sectors, as well as consumer OEMs.

For more information

ROHM Semiconductor 2323 Owen Street Santa Clara, CA 95054 Phone: 408-720-1900 Email:

Switching Regulators Block Diagram