AME
300mA CMOS LDO with
RESET Function
AME1300
n Detailed Description
The AME1300 is a combination of a fixed output, low
drop-out regulator and microprocessor monitor. Unlike
bipolar regulators, the AME1300 supply current does not
increase with load current. In addition,VOUTremains stable
andwithin regulation at very low load currents(an impor-
tant consideration in RTC and CMOS RAM battery back-
up applications) as well as with any type of capacitor (see
below). AME1300 pin functions are detailed below:
RESETB
OUT
VDET
VDET
RESETB
C1
IN
C1
1mF
2.2mF
+
1300
GND
BYP
NC
EN
Battery
CBypass
(Option)
EN Control
(from Power
Control Logic)
470pF
n Pin Description
Pin Number
Pin Name
Pin Description
RESETB output remains low while VDET is below the reset voltage
threshold, and for 300msec VDET rises above reset theshold.
1
RESETB
2
3
4
OUT
GND
BYP
Regulated Voltage Output.
Ground Terminal.
Reference Bypass Input.
Connecting a 1000pF to this input further reduces output noise.
Shutdown Control Input. The regulator is fully enabled when a logic
high is applied to this input. The regulator enters shutdown when a
logic low is applied to this input. During shutdown, regulator output
voltage falls to zero, RESETB output remains valid and supply
current is reduced to 10mA (typ.)
5
EN
6
7
8
NC
IN
No connect.
Power Supply Input.
VDET
Detected input Voltage. VDET and VOUT can be connected together.
Rev.C.02
7
AME [ ANALOG MICROELECTRONICS ]
