ELM603 Datasheet, PDF (3/7 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
■Block diagram
Vin
EN
Reference
Slope comp
●
+
_
Current
●
sense
amplifier
M1
UG
0.6V
FB/Vout
●
Error
amplifier
+
_
PWM
Comparator
PWM
Logic
Oscillator
Clock
●●
M2
LG
DCC
●
Zero-current
comparator
SW
GND
■Standard circuit
Vin
●
●
C1=
C5
4.7µF
●
4 _VIN
2 _GND
1
●
EN
L=2.2µH
SW ₃
FB ⁵
ELM603LB
C6
R3
●
R1
●
R2
●
●
C3
●
C4
Vout
●
C2=
10µF
Vin
* Vout=Vref×(1+R1/R2)
* Passive components without specified values in the above figure are optional.
7- 3
Rev.1.1