ELM603 Datasheet, PDF (1/7 Pages) ELM Electronics – 1.5A 1.5MHz high efficiency PWM step down DC/DC converter

ELM603xB 1.5A 1.5MHz ^{high efficiency PWM step down DC/DC converter}
■General description
ELM603xB 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 only 110µA during operation and drops to less than 1µA in
shutdown. ELM603xB can supply 1.5A of load current from 2.5V to 5.5V supply voltage. The switching
frequency is set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. It can run 100%
duty cycle for low dropout application.
■Features
• Current mode operation
• Thermal shutdown protection
• Constant frequency operation : Typ.1.5MHz
• Output current
: 1.5A
• High efficiency
: Max.95%
• Shutdown current
: <1µA
• Supply voltage
: 2.5V to 5.5V
• Low quiescent current
: Typ.90µA
• Full duty ratio
: 0 to 100% (in dropout)
• Package
: DFN6-2x2, TSOT-25
■Application
• Cellular phone
• PDA and smart phone
• MP3 player
• Digital still camera
• Slim-type DVD
• Wireless and DSL card
• Microprocessors and DSP core supply
• Portable instruments
■Maximum absolute ratings
Parameter
Symbol
Limit
Unit
VIN power supply voltage
Vin
-0.3 to +6.0
V
Apply voltage to SW
Vsw
GND-0.3 to Vin+0.3
V
Apply voltage to EN
Ven
GND-0.3 to Vin
V
Apply voltage to FB
Vfb
GND-0.3 to Vin
V
SW peak current
Isw
3
A
Power dissipation
Pd
200 (DFN6-2x2)
200 (TSOT-25)
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
ELM603xB-X
Symbol
a
Package
b
Product version
c
Taping direction
* ^{Taping direction is one way.}
G: DFN6-2x2
L: TSOT-25
B
N: DFN6-2x2(Refer to PKG file)
S: TSOT-25(Refer to PKG file)
ELM603 x B - X
↑↑ ↑
ab c
7- 1
Rev.1.1