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R1215 Series
PWM Step-up DCDC Controller

Product Specifications

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).

FEATURES

Input Voltage Range (Maximum Rating) 2.0 V to 5.5 V (6.5 V) (R1215D002A/B)
1.8 V to 5.5 V (6.5 V) (R1215D002E/F)
Supply Current Typ. 600 µA (700 kHz)
Typ. 900 µA (1.4 MHz)
Oscillator Frequency Typ. 700 kHz, 1.4 MHz
Built-in Latch-type Protection Function Output Delay Time can be set with an external capacitor
Maximum Duty Cycle Adjustable with external capacitors
Soft-start Time
Feedback Voltage 1.0 V
Feedback Voltage Accuracy ±1.5%
Temperature-Drift Coefficient of Feedback Voltage Typ. ±150ppm/°C
UVLO Detector Threshold Typ. 1.6 V/ 1.79 V by mask option
Package SON-8 (t=MAX. 0.9mm)

APPLICATION INFORMATION

L: 10µH, C1: 1µF, C2: 1µF, C3: 15µF, C4: 1000pF, C5: 2200pF, C6: 0.1µF, C7: 0.1µF, R3: 1kΩ, R4: 4.7kΩ, R5: 68kΩ, R6: 240kΩ
Output voltage set value 9V…R1: 160kΩ, R2: 20kΩ

TYPICAL CHARACTERISTICS

R1215D002E Efficiency vs. Output Current

PIN DESCRIPTION

SON-82.9 mm × 3.0 mm

SON-8

1 EXT
2 GND
3 DTC
4 DELAY
5 VFB
6 VREFOUT
7 AMPOUT
8 VIN

*) The tab suspension leads are substrate level (GND).


R1215 Series for Consumer

APPLICATIONS

  • Constant Voltage Power Source for portable equipment
  • Constant Voltage Power Source for LCD and CCD

SELECTION GUIDE

In the R1215, the oscillator frequency and UVLO detector threshold can be selected at the user's request.

Product Name   Package Quantity per Reel
R1215D002x-TR-FE Consumter SON-8 3,000
  • x … Designation of Oscillator Frequency and Detector Threshold
Code Oscillator Frequency UVLO Detector Threshold
A Typ. 700 kHz Typ. 1.79 V
B Typ. 1.4 MHz Typ. 1.79 V
E Typ. 700 kHz Typ. 1.60 V
F Typ. 1.4 MHz Typ. 1.60 V

DOCUMENT/CONTACT

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Package *1 Marking Reliability *2
SON-8 R1215D R1215D (-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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