ELM612DA_17 Datasheet, PDF (1/8 Pages) ELM Technology Corporation – 3A 36V PWM step down DC/DC converter

ELM612DA 3A 36V PWM step down DC/DC converter
http://www.elm-tech.com
■General description
ELM612DA is a of step-down switching regulator with PWM control, reference voltage source, oscillation
circuit, error amplifier, internal PMOS, etc. ELM612DA provides low-ripple power, high efficiency, and
excellent transient characteristics; PWM control circuit is able to vary the duty ratio linearly from 0 up to 100%.
ELM612DA also contains error amplifier circuit as well as soft-start circuit that prevents overshoot at during
startup. Internal enable function, over current protect function and short circuit protect function will reduce the
operation frequency from 150kHz to 30kHz when overmuch current or short circuit occurs. Meanwhile, internal
compensation block is able to minimize the quantity of required external component. With internal P-channel
Power MOS, and externally connected coil, capacitor, and diode, ELM612DA is able to function as step-
down switching regulator. By the small package of SOP-8, ELM612DA is capable of working as ideal power
supply units for many devices while providing outstanding features such as low current consumption. Since this
converter accommodates input voltage up to 36V, ELM612DA is also suitable for AC adapter applications.
■Features
• Input voltage
: 5.5V to 36V
• Output voltage
: 0.8V to Vin
• Output current
: 3.0A
• Duty ratio
: 0% to 100%
• Constant frequency : Typ.150kHz
• Soft-start
• Thermal shutdown protection
• Short circuit protection
• Built-in internal P-channel MOS
• Package
: SOP-8
■Application
• PC motherboard
• LCD monitor
• Graphic card
• DVD, Blu-ray player
• Telecom equipment
• ADSL modem
• Printer and other peripheral equipment
• Microcomputer power supply
• Network power supply
■Maximum absolute ratings
Parameter
Symbol
Limit
Unit
VIN power supply voltage
Vin
-0.3 to +40
V
Apply voltage to FB
Vfb
GND-0.3 to Vin
V
Apply voltage to EN
Ven
GND-0.3 to Vin+0.3
V
Apply voltage to SW
Vsw
GND-0.3 to Vin+0.3
V
Apply voltage to VC
Vc
Vin-20 to Vin+0.3
V
Power dissipation
Pd
300
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.
Rev.1.2
8- 1