R1240 Series
1.2A 30V Input PWM Step-down DC/DC Converter
R1240 Series
1.2A 30V Input PWM Step-down DC/DC Converter
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Description
The R1240 Series are 30V input, CMOS-based PWM step-down DC/DC converters featuring 1.2A* output current. R1240 include a soft start circuit and a latch or a fold-back protection circuit. By simply using an inductor, resistors, a diode, and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. Due to current mode PWM control, the R1240 provide a fast response and high efficiency.
*) This is an approximate value, because output current depending on conditions and external parts.
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Spec
Consumer Input Voltage Range 4.5 V to 30.0 V (32.0 V) Operating Temperature Range -40°C to 85°C (125°C) Supply Current Typ. 500 µA Standby Current Typ. 0 µA Output Voltage Range Externally Adjustable: 0.8 V to 15.0 V Feedback Voltage 0.8 V Feedback Voltage Accuracy ±12 mV Output Current 1.2 A Oscillator Frequency Typ. 1.25 MHz Maximum Duty Cycle Min. 75%, Typ. 85% Package DFN(PL)2527-10, SOT-23-6W Protections / Functions
TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust -
Quality &
PackagesProduct Name Compatibility Package Marking Reliability R1240K003x-TR DFN(PL)2527-10 See datasheet R1240K R1240N001x-TR-FE SOT-23-6W See datasheet R1240N-FE - Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Download Datasheet
Functional Description
TSD | Thermal Shutdown Function |
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ILX | LX Current Limit Function |
OCP | Overcurrent Protection |
OVP | Overvoltage Protection |
UVLO | Undervoltage Lockout Protection |
OVLO | Overvoltage Lockout Protection |
Reverse | Reverse Current Protection Circuit |
Shutdown | Shutdown Function |
Soft Start | Soft Start Function |
SSCG | Spread Spectrum Clock Generator Function |
PGOOD | Power Good Output |
Auto Discharge | Auto Discharge Function |
Anti-ringing | Anti-ringing Switch Function |
Sequencing | Start-up Sequencing Control |
Max Duty | Maximum Duty Cycle |
Ext. Phase | Externally Adjustable Phase Compensation |
LED Adjust | LED High-speed Dimming Control |