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.
ELM611DA
2A 23V
■Features
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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
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Distributed power system
Network system
FPGA, DSP, ASIC power supply
Laptop
Domestic appliance
■Maximum absolute ratings
Parameter
VIN power supply voltage
Apply voltage to SW
Apply voltage to BS
Apply voltage to FB
Apply voltage to COMP
Apply voltage to EN
Apply voltage to SS
Power dissipation
Operating temperature range
Storage temperature range
Symbol
Vin
Vsw
Vbs
Vfb
Vcomp
Ven
Vss
Pd
Top
Tstg
Limit
-0.3 to +24
GND-0.3 to Vin+0.3
Vsw-0.3 to Vsw+6
-0.3 to +6
-0.3 to +6
-0.3 to Vin+0.3
-0.3 to +6
630
-40 to +85
-65 to +150
Unit
V
V
V
V
V
V
V
mW
°C
°C
Caution:Permanent damage to the device may occur when ratings above maximum absolute ones are used.
■Selection guide
Symbol
a
b
c
ELM611DA-N
Package
Product version
Taping direction
D: SOP-8
A
N: Refer to PKG file
ELM611DA - N
↑↑ ↑
ab c
* Taping direction is one way.
11 - 1
Rev.1.2