Ultralow LDO Regulator from Ricoh

Ricoh launches ultralow 0.2 µA current consumption LDO regulator in miniaturised packaging

Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre has launched the RP118, a 100mA, ultra-low consumption LDO (low-dropout) regulator in smallest possible packages for the IoT market and portable devices. Benefiting in particular from a current consumption of just 0.2µA at no-load and a standby current of 0.002µA are those applications that are mainly in sleep mode and resume for a periodical brief moment to perform a task. The ultra-low current consumption of the RP118 extends the battery lifetime of wireless devices with RF transmitters (BLE, Zigbee, WiSun, Ant), low power CPUs, sensors and energy harvesting circuits.

The RP118 is a special kind of LDO offering three operating modes:

Low power consumption mode
Fast transient response mode
Off mode

The device switches automatically between the low power consumption mode and the fast transient response mode, based on the output current demand of the application. The off mode can be achieved by controlling the Chip Enable pin. The performance of the LDO is enhanced in fast transient response mode. In particular, the ripple rejection as well as the response speed to line and load transients demonstrate better results than a conventional low current consumption LDO (refer to the datasheet for specific details). This means the RP118 contributes to optimised output voltage stability and ripple reduction.

The RP118 features an embedded fold back current limit circuit. When a short circuit occurs, this circuit contributes to the decrease of the output current to the level of 50mA, thus protecting the LDO and other electronic parts from possible damage. Optional is an auto-discharge function that enables a fast discharge of the output capacitor when the LDO switches off.

The RP118 is available in three package options, including standard SOT23-5, small DFN (PLP)1010-4 and ultra-small 0.64 mm x 0.64 mm WLCSP-4-P8 package, which minimizes PCB area.

RP118 Features:

Input Voltage: 1.7V to 5.5V

Output Voltage: 1.2V to 3.6V

Output Voltage Accuracy: ±1.0%

Dropout Voltage: (Iout=100mA, 2.8V type) Typ. 0.1V

Output Current: Min. 100mA

Supply Current: (Iout=0mA) Typ. 0.2µA

Standby Current: Typ. 0.002µA

Protection Circuits: Fold Back Current Limit

Short Circuit Current Limit: Typ. 50mA

Output Capacitor: Ceramic, Min 0.1µF

RP118N: (L2.9 x W2.8 x H1.1mm) SOT23-5

RP118K: (L1.0 x W1.0 x H0.6mm) DFN(PLP)1010-4

RP118Z: (L0.64 x W0.64 x H0.36mm) WLCSP-4-P8

Datasheet: http://www.e-devices.ricoh.co.jp/en/products/power/vr_ldo/rp118/

Who are Ricoh?

Ricoh is a global technology company specializing in office imaging equipment, production print solutions, document management systems and IT services. Headquartered in Tokyo, Ricoh Group operates in about 200 countries and regions. In the financial year ending March 2015, Ricoh Group had worldwide sales of 2,231 billion yen (approx. 18.5 billion USD).

The majority of the company’s revenue comes from products, solutions and services that improve the interaction between people and information. Ricoh also produces award-winning digital cameras and specialized industrial products. It is known for the quality of its technology, the exceptional standard of its customer service and sustainability initiatives.

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