ELM613DB 3A 23V 700kHz synchronous step-down DC/DC converter

ELM613DB is a high efficiency synchronous step-down DC/DC converter series with 3A continuous output current supplied. Included on the substrate with the features listed is a high performance trans-conductance error amplifier that provides tight voltage regulation and accuracy under transient conditions. A built-in Under Voltage Lockout (UVLO) circuit is provided to prevent start-up until the input voltage reaches to 4.5V. In addition, it features over-current protection and thermal shutdown. To improve the light load efficiency, it is designed as the power saving mode (PSM) to minimize the switching loss by reducing the switching frequency.

Programmable soft start
Short circuit protection
Thermal shutdown protection
Current mode operation
Input under voltage lockout (UVLO)
Power saving mode (PSM) during the light load operation
Input voltage range4.5V to 23.0V
Output voltage0.8V to 15.0V
Continuous output current3A
High efficiency93%
Shutdown currentTyp.10µA
Fixed frequencyTyp.700kHz
PackageSOP-8
DatasheetELM613DB
Application
Data comm. xDSL CPE graphics cards
Set-Top-Box, DVD
Servers/Networking
DSP and FPGA power supply
Telecom equipments
DC/DC regulator modules
LCD monitor and LCD TV

Absolute Maximum Ratings

ParameterSymbolLimitUnit
VIN supply voltageVin+26.0V
Apply voltage to SWVsw-1 to 27V
Apply voltage to SW(<10ns)Vsw-5 to 30V
Apply voltage to ENVen-0.3 to Vin+0.3V
Apply voltage to BSVbsVsw+6V
Apply voltage to FBVfb-0.3 to +6V
Apply voltage to COMPVcomp-0.3 to +6V
Apply voltage to SSVss-0.3 to +6V
Power dissipationPd1961mW
Operating temperatureTop-40 to +85°C
Storage temperature rangeTstg-65 to +150°C

Block diagram

block-diagram