ELM630BA Datasheet, PDF (1/7 Pages) ELM Technology Corporation – 1.5A 5.5V 2.5MHz Synchronous step down DC/DC converter

ELM630BA 1.5A 5.5V 2.5MHz Synchronous step down DC/DC converter
http://www.elm-tech.com
■General description
ELM630BA is a high efficiency step down DC/DC converter operated with current mode and constant
frequency. The internal switch and synchronous rectifier are integrated for high efficiency. External Schottky
diodes are not required. The supply current is 300µA during operation and drops to 1µA in shutdown.
ELM630BA can supply 1.5A of load current from 2.9V to 5.5V supply voltage. The output voltage of
ELM630BA is from 1V to 5V, and is adjustable from the FB pin.
The switching frequency is set at 2.5MHz, allowing the use of small surface mount inductors and capacitors. It
can run 100% duty cycle for low dropout application.
■Features
• Low output noise across load range
• Excellent transient response
• Start up into pre-bias output
• Internal soft start
• Input under-voltage lockout
• Output over voltage protection
• Output current limit protection
• Over temperature protection
• Supply Voltage
: 2.9V to 5.5V
• Output voltage (adj.)
: 1V to 5V
• Output current
: 1.5A
• Shutdown current
: < Typ.1µA
• High efficiency
: Max.93%
• Switching frequency
: Typ.2.5MHz
• duty-cycle low dropout operation : 100%
• Package
: SOT-25
■Application
• Bluetooth radios
• DSC and PMPs
• GPS devices
• xDSL systems
• POL regulators
• Portable HDD
• Wireless LAN
■Maximum absolute ratings
Parameter
Symbol
Limit
Unit
Vin power supply voltage
Vin
-0.3 to +6.0
V
Vout Voltage
Vout
–0.3 to Vin+0.3
V
Apply voltage to SW
Vsw
-1 to Vin+1 (Max.6V)
-3 (Max.20ns)
V
Apply voltage to EN
Ven
-0.3 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.1.0
7- 1