Datasheet Details
- Part number
- R1212D
- Manufacturer
- Nisshinbo
- File Size
- 3.92 MB
- Datasheet
- R1212D-Nisshinbo.pdf
- Description
- PWM Step-up DC/DC Controller
R1212D Description
R1212D Series PWM Step-up DC/DC Controller NO.EA-109-220608 OUTLINE The R1212D is a CMOS-based PWM step-up DC/DC controller with low supply current.
Pin Description Pin No 1 2 3 4 5 6 7 8
Symbol EXT GND DTC
DELAY VFB
VREFOUT AMPOUT
VIN
Description External FET Drive Pin (CMOS Output) Ground Pin.
R1212D Features
* Input Voltage Range 2.2 V to 5.5 V
* Built-in Latch-type Protection Function (Output Delay Time can be set with an external capacitor)
* Two Options of Basic Oscillator Frequency 700 kHz, 1.4 MHz, 300 kHz
* Maximum Duty Cycle/Soft-start time Adjustable with extern
R1212D Applications
* Constant Voltage Power Source for portable equipment
* Constant Voltage Power Source for LCD and CCD
1
BLOCK DIAGRAM
R1212D
NO. EA-109-220608
VREFOUT DTC VFB
AMPOUT
Internal VR
VREFOUT Oscillator
UVLO
PWM Comp. VREF
Er. Amp. Latch
DELAY R1212D Block Diagram
VIN EXT GND
2
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