ELM601BA 1.5A 2.5MHz
high efficiency synchronous PWM step-down DC/DC converter
■Selection guide
ELM601BA-S
Symbol
ELM601BA - S
↑ ↑ ↑
a
b
c
Package
Product version
Taping direction
B: SOT-25
A
S: Refer to PKG file
a b c
Taping direction is one way.
*
■Pin configuration
SOT-25(TOP VIEW)
5
4
Pin No.
Pin name
Pin description
1
2
3
4
5
VIN
GND
EN
FB
SW
Input power supply
Ground
Enable control input
Feedback input
Switching node.
1
2
3
■Pins description
VIN : Input power supply. Powers the internal circuitry and is connected to the source of high side P channel
MOSFET.
GND : Ground.
EN : Enable pin. When connected to logic high or tied to VIN pin, ELM601BA is on. When connected to
logic low, the device enters shutdown and current consumption Typ.1uA. The enable pin has a 1MΩ
internal pull-down resistor. This resistor is switched in circuit whenever the EN pin is below the enable
input high threshold, or when the part is in under-voltage lockout.
FB : Input to control output voltage.
SW : Switching node. The inductor should be connected between this pin and output capacitor.
Rev.1.0
7 - 2
ELM-TECH [ ELM Technology Corporation ]
