APE8973 Datasheet, PDF (1/9 Pages) Advanced Power Electronics Corp. – 3A ULTRA LOW DROPOUT LINEAR REGULATOR

Advanced Power
Electronics Corp.
APE8973
3A ULTRA LOW DROPOUT LINEAR REGULATOR
FEATURES
Ultra Low Dropout - 0.23V(typical) at 3A
Output Current
Low ESR Output Capacitor (Multi-layer
Chip Capacitors (MLCC) Applicable
0.8V Reference Voltage
Fast Transient Response
Adjustable Output Voltage by External Resistors
Power-On-Reset Monitoring on Both
VCNTL and VIN Pins
Internal Soft-Start
Under-Voltage Protection
Current-Limit and Thermal Shutdown Protection
Power-OK Output with a Delay Time
ESOP-8 and DFN 3x3-10L Pb-Free Package.
DESCRIPTION
The APE8973 is a 3A ultra low dropout linear regulator.
This product is specifically designed to provide well supply
voltage for front-side-bus termination on motherboards and
NB applications. The IC needs two supply voltages, a
control voltage for the circuitry and a main supply voltage for
power conversion, to reduce power dissipation and provide
extremely low dropout. The APE8973 integrates many
functions. A Power-On-Reset (POR) circuit monitors both
supply voltages to prevent wrong operations. A thermal
shutdown and current limit functions protect the device
against thermal and current over-loads. A POK indicates the
output status with time delay which is set internally. It can
control other converter for power sequence. The APE8973
can be enabled by other power system. Pulling and holding
the EN pin below 0.3V shuts off the output.
The APE8973 is available in ESOP-8 and DFN 3x3-
10L packages which features small size as an Exposed Pad
to reduce the junction-to-case resistance, being applicable
in 2~3W applications.
TYPICAL APPLICATION
1.Using an Output Capacitor with ESR > 20mΩ
VCNTL=5V
R3
1K
U1
VCNTL
VIN
C1
1uF
ON
OFF
POK
EN
VOUT
VOUT
GND
FB
APE8973
C2
C3
100uF 0.1uF
VIN=1.5V
Vout=1.2V/3A
R1
C6
1K
12~48nF
C4
C5
220uF 0.1u
R2
2K
2.Using an MLCC as the Output Capacitor
ESOP- 8
R3
10K
VCNTL=5V
U2
VCNTL
VIN
ON
OFF
C1
1uF
POK
EN
VOUT
VOUT
GND
FB
APE8973MP
VOUT=VFB*(1+R1/R2)
VFB = 0.8V
VIN=1.5V
C3
10uF
R1
39K
C6
56pF
Vout=1.2V/3A
C5
10uF
R2
78K
Data and specifications subject to change without notice
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201005311