The R1232D Series are low supply current CMOS-based PWM step-down DC/DC converters with synchronous rectifier. R1232D includes a soft start circuit, under-voltage lockout circuit (UVLO) and latch type protection circuit. By simply using an inductor, a capacitor, and (resistors) as external components, a high-efficiency step-down DC/DC converter can be easily configured. R1232D comes in two types: R1232Dxx1A/B with internally fixed output voltage and R1232D001C/D with adjustable output voltage with external resistors.
The R1232D Series are low supply current CMOS-based PWM step-down DC/DC converters featuring a synchronous rectifier. The series includes soft start and under-voltage lockout circuits, along with latch-type protection. It is available in two types: the R1232Dxx1A/B with internally fixed output voltage and the R1232D001C/D with adjustable output voltage using external resistors.
| Supply Current (Ip) | Typ. 140A (1 MHz), 240A (2.25MHz) @ Vin=Vout=5.5V |
|---|---|
| UVLO Detect Voltage (Vuvio) | Typ. 2.25V |
| Soft Start Time (tstar) | Typ. Ims (1MHz), Typ. 0.4ms (2.25MHz) |
| Input Voltage Range (Vin) | 2.6V to 5.5V |
| Output Voltage Range (Vou) - Fixed Type | .9V to 3.3V |
| Coil-current Limit Circuit | Current limit Typ. 1.44 |
| Output Voltage Accuracy | <= 2% |
| Oscillator Frequency (fosc) | 1MHz, 2.25MHz |
| Package | SON-8 |
The series comes in two types: R1232Dxx1A/B with internally fixed output voltage and R1232D001C/D with adjustable output voltage.
The typical supply current (Ip) is 140A when operating at 1 MHz.
It is used as a power source for hand-held communication equipment, cameras, VCRs, battery-powered equipment, and home appliances.