rohm BD9740KN Technical Note
Summary
High-performance 7-channel switching regulator ICs designed for powering digital cameras, camcorders, and portable video players. These advanced regulators feature built-in FETs, soft start functionality, and comprehensive protection circuits like overload and thermal shutdown. The manual provides detailed technical specifications, wide voltage range data (1.5V–10V), circuit parameters, and operational guides for models BD9739KN and BD9740KN. Ideal for electronics designers building sophisticated digital imaging equipment that requires reliable, high-efficiency power management.
Page 1 Text Content
Regulators ICs for Digital Cameras and Camcorders
System Switching Regulator ICs with Built-in FET (10V) BD9739KN, BD9740KN No.10036EAT07 ●Description The 7-channel switching regulators include built-in FETs, and are designed for use in digital still cameras. They feature built-in power FETs and soft start functionality, reducing the number of external components.
●Features 1) Wide supply voltage range: 1.5 V to 10 V 2) High-precision reference voltage: ± 1% 3) Built-in shutdown circuit for overload (timer-latch type) 4) Oscillator frequency is user-adjustable 5) Built-in thermal shutdown circuit 6) Standby mode current: 0 μA 7) Built-in load switch circuit 8) Selectable step-up/step-down mode 9) Supports inverting circuit for negative output voltage 10) Support a constant-current LED drive for backlight applications 11) Includes multiple synchronous rectification channels
●Applications Digital still cameras, portable DVD players, and digital video cameras.
●Product lineup
Parameter BD9739KN BD9740KN
Input voltage 1.5 V to 10 V 1.5 V to 10 V Reference voltage precision 1 V ± 1% 1 V ± 1% Operating frequency range 100 k to 1.2 MHz 100 k to 1.2 MHz Step-up 3CH 2CH Step-down 2CH 1CH Step-up/step-down switch regulator 1CH 3CH Inverting 1CH 1CH Built-in FET 3CH 1CH Synchronous rectification 3CH 2CH Load switching 3CH — Operating temperature range -20℃ to +85℃ -20℃ to +85℃ Package UQFN64 UQFN48
www.rohm.com 2010.09 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For rohm BD9740KN Technical Note
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 15 |
| File Size | 393.38 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What is the operating temperature range for these regulators?
The operating temperature range is -20℃ to +85℃.
How can I adjust the oscillator frequency?
The oscillator frequency of the ICs is user-adjustable, ranging from 100 k to 1.2 MHz.
What are the main applications for these regulators?
They are designed for use in digital still cameras, portable DVD players, and digital video cameras.
Does it offer built-in protection features?
Yes, they include a built-in shutdown circuit for overload (timer-latch type), thermal shutdown, and an under voltage lockout circuit.