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R1240K003x-TR

Richo
Part Number R1240K003x-TR
Manufacturer Richo
Description 30V Input PWM Step-down DC/DC Converter
Published Mar 28, 2014
Detailed Description R1240x/R1244N Series 1.2A∗ 30V Input PWM Step-down DC/DC Converter The R1240x/R1244N Series are 30V input, CMOS-based PW...
Datasheet PDF File R1240K003x-TR PDF File

R1240K003x-TR
R1240K003x-TR

Overview
R1240x/R1244N Series 1.
2A∗ 30V Input PWM Step-down DC/DC Converter The R1240x/R1244N Series are 30V input, CMOS-based PWM step-down DC/DC converters featuring 1.
2A∗ output current.
R1240x/R1244N include a soft start circuit and a latch or a fold-back protection circuit.
(R1244N includes a fold-back Protection Circuit only.
) 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 R1240x/R1244N provide a fast response and high efficiency.
Ceramic output capacitors can be used.
Two different pin layout of SOT-23-6W package as R1240N and R1244N are available.
FEATURES • Supply Current (IDD) ······································ Typ.
500μA (No switching) • Standby Current (Istandby) ······························· Max.
5μA (CE="L") • Input Voltage Range (VIN) ····························· 4.
5V to 30.
0V • Output Voltage Range (VOUT)························ 0.
8V to 15.
0V (Externally adjustable) • Feedback Voltage Accuracy ························· ± 12mV • Output Current (IOUT)····································· 1.
2A∗ • Oscillator Frequency (fosc)····························· 1.
25MHz • Oscillator Maximum Duty Cycle (Maxduty)··· R1240x : Min.
75%, Typ.
85% • Minimum ON Time (tMIN) ······························· Typ.
100ns R1244N : Typ.
85% (Feedback voltage : 0.
8V) • UVLO Detect Voltage (VUVLO) ···········Typ.
3.
8V • Soft Start Time (tstart) ·······················Typ.
0.
4ms • High Side Switch Limit Current ·······Typ.
2A • Thermal Shutdown Circuit ··············Stops at 160°C.
• Latch Protection Circuit ··················Delay time for protection • Fold-back Protection Circuit ···········Fold-back frequency • Packages ········································DFN(PLP)2527-10, SOT-23-6W Typ.
2ms (A Version) Typ.
310kHz (B Version) ∗) This is an approximate value, because output current depending on conditions and external parts.
BLO...


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