R1215 Series
PWM Step-up DC/DC Controller

Download Datasheet

  • Description

    The R1215 Series are low supply current CMOS PWM step-up DC/DC controllers. R1215 does not include an internal output transistor. By simply using a power MOS, an inductor, a diode, resistors, and capacitors as external components, a high-efficiency step-up DC/DC converter can be easily configured. The oscillator maximum duty cycle and soft start time as well as phase compensation can be set with external resistor and capacitor. (The oscillator maximum duty cycle does not include internal limit.)

    The oscillator frequency can be selected from 700kHz or 1.4MHz. The input voltage of R1215 is lower than the R1212. The voltage range is 1.8V (2.0V) to 5.5V. The latch type protection circuit embedded into the device latches the external driver in the "OFF" state when the oscillator maximum duty cycle continues for a predetermined period of time setting by an external capacitor. R1215 also includes an under-voltage lockout circuit (UVLO).

  • Spec
    Consumer
    Input Voltage Range 2.0 V to 5.5 V (6.5 V) (R1215D002A/B)
    1.8 V to 5.5 V (6.5 V) (R1215D002E/F)
    Operating Temperature Range -40°C to 85°C (125°C)
    Supply Current Typ. 600 µA (700 kHz)
    Typ. 900 µA (1.4 MHz)
    Feedback Voltage 1.0 V
    Feedback Voltage Accuracy ±15 mV
    Feedback Voltage Temperature Coefficient Typ. ±150 ppm/°C
    Oscillator Frequency Typ. 700 kHz, 1.4 MHz
    Maximum Duty Cycle Externally Adjustable
    Package SON-8

    Protections / Functions

    TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust
  • Technical
    Documents
    • Typical Application

      Typical Application

    • R1215D002E Efficiency vs. Output Current

      R1215D002E Efficiency vs. Output Current

  • Quality &
    Packages
    • Refer to the datasheets for the details on the product.
    • The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
    • Please contact us or our distributors for unpublished reliability information.

Download Datasheet

Functional Description

TSD Thermal Shutdown Function
ILX LX Current Limit Function
OCP Overcurrent Protection
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

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Category:DC/DC Switching Regulators

Topology Boost
VIN
min (V)
1.8
VIN
max (V)
5.5
ISS
(µA)
600