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R1245S003G

Richo
Part Number R1245S003G
Manufacturer Richo
Description 30 V Step Down DC/DC Converter
Published Jun 5, 2014
Detailed Description R1245x Series AEC-Q100 Grade 2 Certified 1.2 A, 30 V Step Down DC/DC Converter for Automotive Applications NO. EC-269-14...
Datasheet PDF File R1245S003G PDF File

R1245S003G
R1245S003G

Overview
R1245x Series AEC-Q100 Grade 2 Certified 1.
2 A, 30 V Step Down DC/DC Converter for Automotive Applications NO.
EC-269-140311 OUTLINE The R1245x is a Step-down DC/DC converter with internal N-channel high side Tr.
That is developed with CMOS process technology.
The ON resistance of the built-in high-side transistor is 0.
35 Ω and the R1245x can provide the maximum 1.
2 A output current.
Each of the ICs consists of an oscillator, a PWM control circuit, a voltage reference unit, an error amplifier, a phase compensation circuit, a slope compensation circuit, a soft-start circuit, protection circuits, an internal voltage regulator, and a switch for bootstrap circuit.
The ICs can make up a step-down DC/DC converter with an inductor, resistors, a diode, and capacitors.
The R1245x is a current mode operating type DC/DC converter without an external current sense resistor, and realizes fast response and high efficiency.
As an output capacitor, a ceramic type capacitor can be used with the R1245x.
The options of the internal oscillator frequency are preset at 330 kHz for version A and B, 500 kHz for version C and D, 1000 kHz for version E and F, 2400 kHz for version G and H.
As for protection, an Lx peak current limit circuit cycle by cycle, a thermal shutdown function and an under voltage lockout (UVLO) function are built in.
Furthermore, there are two types for short protection, for A/C/E/G version, a latch protection function which makes the output latch off if the output voltage keeps lower than the set output voltage for a certain time after detecting current limit is built in, for B/D/F/H version, a fold-back protection function which changes the oscillator frequency slower after detecting short circuit or equivalent.
As for the packages of the R1245x, HSOP-8E and DFN2020-8 are available.
FEATURES ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● Input Voltage Range (Maximum Rating) ················ 4.
5 V to 30 V (32 V) Operating Temperature ······································ −40°C to ...


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