EUP7559
Pin Configurations
Package Type
Pin Configurations
TDFN-8
Pin Description
PIN
Pin
DESCRIPTION
LDO A Regulator Input. Connect to INB. Input voltage can range from 2.5V to 6V. Bypass
INA with a ceramic capacitor to GND.
INA
1
Shutdown A Input. A logic-low on ENA shuts down regulator A. If ENA and ENB are both
low, both regulators and the internal reference are off and the supply current is reduced to
10nA (typ). If either ENA or ENB is a logic high, the internal reference is on. Connect
ENA to INA for always-on operation of regulator A.
ENA
ENB
2
3
Shutdown B Input. A logic-low on ENB shuts down regulator B. If ENA and ENB are both
low, both regulators and the internal reference are off and the supply current is reduced to
10nA (typ). If either ENA or ENB is a logic high, the internal reference is on. Connect
ENB to INB for always-on operation of regulator B.
LDO B Regulator Input. Connect to INA. Input voltage can range from 2.5V to 6V. Bypass
INB with a ceramic capacitor to GND.
Regulator B Output. OUTB can source up to 300mA continuous current. Bypass OUTB
with a ceramic capacitor to GND. During shutdown, OUTB is internally discharged to
GND through a 300Ω. resistor.
INB
4
5
OUTB
GND
BP
6
7
Ground.
Reference Noise Bypass. Bypass BP with a low-leakage 0.01µF ceramic capacitor for
reduced noise at both outputs.
Regulator A Output. OUTA can source up to 300mA continuous current. Bypass OUTA
with a ceramic capacitor to GND. During shutdown, OUTA is internally discharged to
GND through a 300Ω. resistor.
OUTA
8
DS7559 Ver 1.0 May. 2007
3
EUTECH [ EUTECH MICROELECTRONICS INC ]
