ELM611DA Datasheet, PDF (1/11 Pages) ELM Technology Corporation – high efficiency synchronous PWM step down DC/DC converter

ELM611DA 2A 23V
high efficiency synchronous PWM step down DC/DC converter
■General description
ELM611DA is 350kHz fixed frequency PWM synchronous step-down regulator, whose input voltage can
be set within the range from 4.75V to 23V and output one is adjustable within the range from 0.923V to 18V;
maximum output current of ELM611DA can reach 2A. ELM611DA includes 2 switching MOSFETs whose ON
resistance is 85mΩ. Current mode control of ELM611DA makes it possible to provide fast transient response
and current protection of cycle-by-cycle. Shutdown current is Typ.1μA. Soft start is programmable by external
capacitor during start and limits inrush current to the appropriate value. ELM611DA is equipped with thermal
shutdown protection.
■Features
• Programmable soft start
• Short circuit protection
• Thermal shutdown protection
• Input voltage
: 4.75V to 23V
• Output voltage
: 0.923V to 18V
• Output current
: 2A
• High efficiency
: Max.93%
• Power MOSFET switches : 85mΩ
• Shutdown current
: Typ.1µA
• Fixed frequency
: Typ.350kHz
• Package
: SOP-8
■Application
• Distributed power system
• Network system
• FPGA, DSP, ASIC power supply
• Laptop
• Domestic appliance
■Maximum absolute ratings
Parameter
Symbol
Limit
Unit
VIN power supply voltage
Vin
-0.3 to +24
V
Apply voltage to SW
Vsw
GND-0.3 to Vin+0.3
V
Apply voltage to BS
Vbs
Vsw-0.3 to Vsw+6
V
Apply voltage to FB
Vfb
-0.3 to +6
V
Apply voltage to COMP
Vcomp
-0.3 to +6
V
Apply voltage to EN
Ven
-0.3 to Vin+0.3
V
Apply voltage to SS
Vss
-0.3 to +6
V
Power dissipation
Pd
630
mW
Operating temperature range
Top
-40 to +85
°C
Storage temperature range
Tstg
-65 to +150
°C
Caution:Permanent damage to the device may occur when ratings above maximum absolute ones are used.
■Selection guide
ELM611DA-N
Symbol
a
Package
b
Product version
c
Taping direction
* ^{Taping direction is one way.}
D: SOP-8
A
N: Refer to PKG file
ELM611DA - N
↑↑ ↑
ab c
11 - 1
Rev.1.2