R1245x00xD Datasheet PDF - Richo
| Part Number | R1245x00xD | |
| Description | 30 V Step Down DC/DC Converter | |
| Manufacturers | Richo | |
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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 105°C
● Internal N-channel MOSFET Driver ······················ RON = 0.35 Ω Typ.
● Adjustable Output Voltage with External Resistor····· 0.8 V or more
● Feedback Voltage and Tolerance ························· 0.8 V±1.0%
● Peak Current Limit ············································ Typ. 2.0 A
● UVLO Function Released Voltage ························ Typ. 4.0 V
● Operating Frequency········································· 330 kHz (A/B version), 500 kHz (C/D version),
1000 kHz (E/F version), 2400 kHz (G/H version)
● Fold-back Protected Frequency ··························· 170 kHz (B/D version), 250 kHz (F version),
400 kHz (H version)
● Latch Protection Delay Time ······························· Typ. 4 ms for A/C/E/G version
● Built-in Thermal Shutdown Circuit ························ Typ. 160°C
● Ceramic Capacitors Recommended for Input and Output
● Stand-by Current ·············································· Typ. 0 μA
● Packages ······················································· HSOP-8E, DFN2020-8
● AEC-Q100 Certified Product Package Type············ HSOP-8E
APPLICATIONS
● Power source for car accessories including car audio equipment, car navigation system, and ETC system.
● Power source for control units including EV inverter and charge control.
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R1245x
NO. EC-269-140311
ABSOLUTE MAXMUM RATINGS
Symbol Item
VIN Input Voltage
VBST BST Pin Voltage
VLX LX Pin Voltage
VCE CE Pin Input Voltage
VFB Feedback Pin Voltage
Power Dissipation
PD (Ultra High Wattage Land Pattern)*1
HSOP-8E 3600
Power Dissipation (Standard Land Pattern)*1 DFN2020-8
Tj Junction Temperature
Tstg Storage Temperature Range
*1 Refer to PACKAGE INFORMATION for detailed information.
Rating
−0.3 to 32
VLX - 0.3 to VLX + 6
−0.3 to VIN + 0.3
−0.3 to VIN + 0.3
−0.3 to 6
(GND = 0 V)
Unit
V
V
V
V
V
1100
−40 to 150
−55 to 150
mW
°C
°C
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanic al stress momentaril y exceeded absolute ma ximum ratings ma y cause the perma nent
damages and may degrade the lifetime and safety for both device and system using the device in the field.
The functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS
Symbol Item
VIN
Ta
Input Voltage
Operating Temperature Range
Rating
4.5 to 30
−40 to 105
Unit
V
°C
RECOMMENDED OPERATING CONDITIONS
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the recommended
operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the
semiconductor devices may receive serious damage when they continue to operate over the recommended operating
conditions.
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for R1245x00xD electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ R1245x00xD.PDF Datasheet ] | |
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