2A 23V
step down DC/DC converter
ELM611DA
synchronous PWM
high efficiency
■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
■Application
• Programmable soft start
• Short circuit protection
• Thermal shutdown protection
• Input voltage
• Distributed power system
• Network system
• FPGA, DSP, ASIC power supply
• Laptop
: 4.75V to 23V
: 0.923V to 18V
: 2A
• Output voltage
• Domestic appliance
• Output current
• High efficiency
: Max.93%
: 85mΩ
• Power MOSFET switches
• Shutdown current
• Fixed frequency
• Package
: Typ.1µA
: Typ.350kHz
: SOP-8
■Maximum absolute ratings
Parameter
VIN power supply voltage
Apply voltage to SW
Apply voltage to BS
Symbol
Vin
Vsw
Vbs
Limit
-0.3 to +24
GND-0.3 to Vin+0.3
Vsw-0.3 to Vsw+6
-0.3 to +6
Unit
V
V
V
V
Apply voltage to FB
Vfb
Apply voltage to COMP
Apply voltage to EN
Apply voltage to SS
Vcomp
Ven
Vss
-0.3 to +6
-0.3 to Vin+0.3
-0.3 to +6
V
V
V
Power dissipation
Operating temperature range
Storage temperature range
Pd
Top
Tstg
630
-40 to +85
-65 to +150
mW
°C
°C
Caution:Permanent damage to the device may occur when ratings above maximum absolute ones are used.
■Selection guide
ELM611DA-N
Symbol
ELM611DA - N
a
b
c
Package
Product version
Taping direction
D: SOP-8
A
N: Refer to PKG file
↑ ↑ ↑
a b c
Taping direction is one way.
*
Rev.1.2
11 - 1
ELM-TECH [ ELM Technology Corporation ]
