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R1210 Series
8V Input PWM Step-up DCDC Converter

Product Specifications

The R1210 Series are low supply current, CMOS-based PWM step-up DC/DC converters. By simply using an inductor, a diode, and a capacitor as external components, a high-efficiency step-up DC/DC converter can be easily configured. The xx1 version with an internal output transistor and the xx2 version with an external transistor are available. The oscillator frequency can be selected from 100kHz or 180kHz. The xx1A version is also available, which contains a basic frequency changeover circuit that switches the oscillator frequency from 100kHz to 35kHz when output load is reduced. R1210 also has a function that detects drastic changes in output voltage and reduces the amount of overshoot/undershoot by switching control mode.

FEATURES

Input Voltage Range (Maximum Rating) Max. 8.0 V (9.0 V)
Standby Current Max. 0.5 µA
Temperature-Drift Coefficient of Output Voltage Typ. ±100 ppm/°C
Output Voltage Range 2.2 V to 3.5 V (0.1V steps) (R1210Nxx1A)
2.2 V to 6.0 V (0.1V steps) (R1210NxxxC/D)
Oscillator Frequency 100 kHz (R1210Nxx1A, R1210NxxxC)
180 kHz (R1210NxxxD)
Output Voltage Accuracy ±2.5%
Package SOT-23-5
Efficiency Typ. 88% (VIN=Set Output Voltage×0.6 [V], IOUT=10mA)
Start-up Voltage Max. 0.9 V (R1210Nxx1x), Max. 0.8 V (R1210Nxx2x)
Basic Frequency change-over circuit (only for xx1A type) from Typ. 100 kHz to 35 kHz

APPLICATION INFORMATION

R1210Nxx1x

L: 100µH, CL: 22µFx2

R1210Nxx2x

L: 27µH, CL: 47µF×2, Rb: 300Ω, Cb: 0.01µF

TYPICAL CHARACTERISTICS

R1210N301C Efficiency vs. Output Current

R1210N302C Efficiency vs. Output Current

PIN DESCRIPTION

SOT-23-5

SOT-23-52.9 mm × 2.8 mm
1 CE
2 VOUT
3 NC
4 GND
5 Lx or EXT

R1210 Series for Consumer

APPLICATIONS

  • Power source for battery-powered equipment
  • Power source for portable communication appliances, cameras, VCRs
  • Power source for appliances of which require higher voltage than battery voltage

SELECTION GUIDE

The OVP threshold voltage, and the package for the ICs can be selected at the user's request.

Product Name   Package Quantity per Reel
R1210Nxx#$-TR-FE Consumter SOT-23-5 3,000
  • xx … Specify the output voltage within the range of 2.2V (22) to 6.0V (60) in 0.1V steps. (up to 3.5V (35) for xx1A)
  • # … 1: Internal output transistor type
    2: External transistor type
  • $ … A: Oscillator frequency 100 kHz, built-in basic frequency change-over circuit
    C: Oscillator frequency 100 kHz
    D: Oscillator frequency 180 kHz
    (R1210Nxx2A-TR-FE is not available.)

DOCUMENT/CONTACT

Package *1 Marking Reliability *2
SOT-23-5 R1210N R1210N (-FE)

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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