AME
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,V
OUT
remains stable
and within 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:
300mA CMOS LDO with
RESET Function
RESETB
RESETB
V
DET
V
DET
C1
2.2µF
OUT
IN
C1
1µF
Battery
GND
1300
+
NC
BYP
EN
CBypass
EN Control
(Option)
(from Power
470pF
Control Logic)
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Pin Description
Pin Number
1
2
3
4
Pin Name
RESETB
OUT
GND
BYP
Pin Description
RESETB output remains low while V
DET
is below the reset voltage
threshold, and for 300msec V
DET
rises above reset theshold.
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 10µA (typ.)
No connect.
Power Supply Input.
Detected input Voltage. V
DET
and V
OUT
can be connected together.
5
EN
6
7
8
NC
IN
V
DET
Rev.C.02
7
AME [ ANALOG MICROELECTRONICS ]
