RN5RK331A RICOH Co.,Ltd., RN5RK331A Datasheet

RN5RK331A

Manufacturer Part Number

RN5RK331A

Description

Manufacturer

RICOH Co.,Ltd.

Datasheet

1.RN5RK251A.pdf (25 pages)

Specifications of RN5RK331A

Date_code

05+

Packing_info

SOT-153

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OUTLINE

low supply current and high output voltage accuracy.

ON resistance (Lx switch), a reference voltage unit, a high speed comparator, resistors for voltage detection, an

Lx switch protection circuit and an internal chip enable circuit. A low ripple, high efficiency step-up DC/DC

converter can be composed of this RN5RKxx1A/xx1B with only three external components: an inductor, a diode

and a capacitor.

for an external transistor instead of an Lx pin. As it is possible to load a large output current with a power

transistor which has a low saturation voltage, RN5RKxx2A IC is recommendable to users who need an output

current as large as between several tens mA and several hundreds mA.

FEATURES

APPLICATIONS

VFM STEP-UP DC/DC CONVERTER

The RN5RKxx1A/xx1B/xx2A Series are CMOS-based VFM (Chopper) Step-up DC/DC converter ICs with ultra

Each of the RN5RKxx1A/xx1B consists of an oscillator, a VFM control circuit, a driver transistor to have low

The RN5RKxx2A uses the same chip as what is employed in the RN5RKxx1A/1B IC and has a drive pin (EXT)

Using the chip enable function, it is possible to make the supply current on standby minimized.

Since the package for these ICs is SOT-23-5, high density mounting of the ICs on board is possible.

• Small Number of External Components .............................. Only an inductor, a diode and a capacitor

• Standby Current ................................................................... Typ. 0µA

• Low Temperature-Drift Coefficient of Output Voltage........... Typ. ±100ppm/°C

• Output Voltage Range.......................................................... 2.0V to 5.5V

• Two Kinds of Duty Ratio....................................................... 77% (xx1A, xx2A)/ 55% (xx1B)

• High Output Voltage Accuracy ............................................. ±2.5%

• Small Packages ................................................................. SOT-23-5

• High Efficiency ..................................................................... Typ. 85% (RN5RK301B, V

• Low Ripple and Low Noise

• Including a Driver Transistor with Low ON Resistance........ Only RN5RKxx1A/xx1B

• Low Start-up Voltage............................................................ Max.0.9V

• Power source for battery-powered equipment.

• Power source for cameras, camcorders, VCRs, and hand-held communication equipment.

• Power source for those appliances which require higher cell voltage than that of batteries.

RN5RK SERIES

(RN5RKxx1A/xx1B)

=2V, I

NO.EA-045-080411

OUT

=10mA)

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