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首頁         Ricoh 推出 Ultra-low Quiescent Current Buck DC/DC Converters with Battery Monitor for IoT Equipment

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2019-02-12 RICOH 推出 Ultra-low Quiescent Current Buck DC/DC Converters with Battery Monitor for IoT Equipment

Ricoh Electronic Devices Co., Ltd. launched RP514 and RP515 series, ultra-low quiescent current buck (step-down) DC/DC converters including a battery monitor, suitable for IoT equipment.

As the IoT market expands, more and more IoT devices with sensors, MCUs, communication modules, etc. are required to have a long battery lifetime and to be small in size. At the same time, there are rising needs for functions that can monitor the battery voltage with high accuracy and low current consumption. The RP514/ RP515 can meet the needs of the market.

The products’ electric characteristics are as follows: a wide input voltage range of 1.8 V to 5.5 V; Typ. 0.4 µA quiescent current (DC/DC Section: 0.3 µA, BM Section: 0.1 µA); the user-selectable output voltage ranging from 1.0 V to 4.0 V; the output voltage accuracy of ±1.5%. The output current of the RP514 is 100 mA*1, and that of the RP515 is 300 mA*1.

Each of the new product is equipped with a battery monitor pin, which contributes to reducing external components and leakage current. Therefore, the RP514/ RP515 enable IoT devices to be small and energy-efficient. (The divided ratio of BM output voltage is user-selectable: VIN/3 or VIN/4.)

The world's smallest WLCSP-9-P2 (1.45×1.48×0.4(max) mm) enables high-density mounting. Additionally, DFN(PLP)2527-10 (2.50×2.70×0.6(max) mm) is under development. Mass production of the package is scheduled in March, 2019.

*1: Actual output current depends on conditions and components surrounding the product. The value mentioned here is a reference value under certain conditions.
Image: RP514/ RP515 Series (WLCSP-9-P2) RP514/ RP515 Series (WLCSP-9-P2)

Product Features of the RP514/ RP515

The RP514/ RP515 are buck DC/DC converters that achieve ultra-low quiescent current and space-saving design, suitable for IoT devices.

1. Battery Monitor

RP514/ RP515 don't require any external components to divide the input voltage for battery monitor, while the conventional circuits mentioned above do.

Image: Typical Applications of RP514 Series Typical Applications of RP514 Series

2. Ultra-low Quiescent Current

The RP514/ RP515 achieve ultra-low quiescent current of Typ. 0.4 µA (DC/DC Section: 0.3 µA, BM Section: 0.1 µA), contributing to the long-time operation of IoT devices.

3. Wide Input Voltage Range

The RP514/ RP515 can correspond to various batteries such as coin-shaped batteries, next-generation batteries, capacitors, etc., due to the wide input voltage range of 1.8 V to 5.5 V. Moreover, the least operating voltage of 1.8 V helps prolong the battery lifetime.

4. Small Packages Reducing Mounting Area

WLCSP-9-P2 and DFN(PLP)2527-10 are adopted to the new products. The small packages contribute to reducing the mounting area.

Product Specifications

Product Name RP514 series / RP515 series
Supply Current Typ. 0.4 µA (At No Load)
(DC/DC Section: 0.3 µA, BM Section: 0.1 µA)
Input Voltage Range (VIN) 1.8 V to 5.5 V (Rating: 6.5 V)
Output Voltage Range (VOUT) 1.0 V to 4.0 V
Output Voltage Accuracy ±1.5%
Output Current RP514 series: 100 mA*2
RP515 series: 300 mA*2
Output Voltage (BM Section) VIN/3 or VIN/4 User-selectable
Auto-discharge Yes / No User-selectable
Ceramic Capacitor Available BM Section: 100 to 220 nF

*2: Actual output current depends on conditions and components surrounding the product. The value mentioned here is a reference value under certain conditions.

RP514 Series Typical Characteristics  (VOUT=1.8V,Ta=25°C)
Image: RP514 Series Typical Characteristics
RP515 Series Typical Characteristics  (VOUT=1.8V,Ta=25°C)
Image: RP515 Series Typical Characteristics
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