RICOH RP105x Series 400mA 0.9V Input LDO with dual input pin Data Sheet

RP105x Series

400m A 0.9V Input LDO with dual input pin

The RP105x Series are CMOS-based LDO regulators featuring 400m A output with dual input pin. The input voltage can correspond from 0.9V by the inputting voltage into VBIAS. The UVLO function will lock out the internal circuit, if the input voltage is less than the UVLO voltage. Due to a built-in Nch. transistor with low on-resistance of 0.4Ω (at VOUT=0.8V), RP105x provides a low dropout voltage. RP105x also has an excellent line transient response. In addition to SOT-23-5, a 1.2mm square DFN(PLP)1212-6 package is also available.

FEATURES • Supply Current (ISS) ························Typ. 28μA (VIN=SET VOUT+0.5V) • Temp.coeff.of Output Voltage ·········Typ. ± 50ppm/°C • Standby Current (Istandby) ·················Typ. 0.1μA (Same as above, CE=”L”) • Line Regulation·······························Typ. 0.02%/V • Dropout Voltage (VDIF) ····················Typ. 0.18V (IOUT=400m A, VBIAS=3.6V) • Fold-back Protection Circuit ···········Current limit Typ.120m A • Ripple Rejection (RR)·····················Typ. 80d B (f=1k Hz, VIN Ripple) • Auto-Discharge function ·················D Version • Input Voltage Range1 (VBIAS) ··········2.4V to 5.25V (VOUT < 0.8V) • Packages········································DFN(PLP)1212-6,

• Input Voltage Range2 (VIN) ············0.9V to VBIAS (VOUT < 0.8V) SOT-23-5

• Output Voltage Range (VOUT)··········0.6V to1.5V (internally fixed) • Ceramic capacitors can be used. ···CBIAS=CIN=1μF or more,

• Output Voltage Accuracy ················± 15m V COUT=2.2μF or more

(The above shows specification at Topt=25°C. Design assurance value at -40°C ≤ Topt ≤ 85°C is also available. For details, please refer to the datasheet.)

BLOCK DIAGRAMS RP105xxx1B RP105xxx1D (Without Auto-Discharge function) (With Auto-Discharge function)

VBIAS VBIAS

VIN VOUT VIN VOUT

ro po ut ol ta ge IF (m

UVLO UVLO

Vref Vref

Current Limit Current Limit

GNDCE GNDCE

SELECTION GUIDES TYPICAL APPLICATION

DC/DC_OUT

Halogen Free Package Q'ty per Reel Part No.

RP500x RP105x

DFN(PLP)1212-6 5,000 pcs RP105K.xx.1.∗ -TR

VR_OUT

VIN LX VBIAS VOUT

SOT-23-5 3,000 pcs RP105N.xx.1.∗ -TR-FE

Li-ion 4.7μH

3.6V or

.xx. : Specify the output voltage within the range of 3cell CE VOUT CE

0.6V (.06.) to 1.5V (.15.) in 0.1V steps.

AGND PGND VIN GND

.∗ : Select from (.B.) without auto-discharge function or

COUT CBIAS CIN COUT

(.D.) with auto-discharge function 10μFCIN Step-down

DC/DC Converter

PACKAGES TYPICAL CHARACTERISTIC

DFN(PLP)1212-6 SOT-23-5 RP105x151x Dropout Voltage vs. Output Current

Top View Bottom View 5 4

1 VBIAS 1 VIN 2 GND 2 GND 3 CE 3 CE 4 VIN 4 VBIAS 5 NC 5 VOUT 6 VOUT

Output Current IOUT(m A)

APPLICATIONS • Power source for hand-held communication equipment, cameras, and VCRs • Power source for battery-powered equipment • Power source for home appliances

No.EK-179-120403 CMOS LDO Regulator