APE8901_14 Datasheet, PDF (1/8 Pages) Advanced Power Electronics Corp. – 1A ULTRA LOW DROPOUT LINEAR REGULATOR

Advanced Power
Electronics Corp.
APE8901
1A ULTRA LOW DROPOUT LINEAR REGULATOR
FEATURES
DESCRIPTION
Ultra Low Dropout - 0.2V(typical) at 1A 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 2x2 Pb-Free Packages.
The APE8901 is a 1A 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
APE8901 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 APE8901 can be enabled by
other power system. Pulling and holding the EN pin below
0.3V shuts off the output.
The APE8901 is available in ESOP-8 and DFN 2x2
packages. That features small size as SOP-8 with an
Exposed Pad to reduce the junction-to-case resistance,
being applicable in 2~3W applications.
TYPICAL APPLICATION CIRCUIT
1. Using an Output Capacitor with ESR > 20mΩ
VCNTL=5V
C1
1uF
ON
OFF
R3
1K
U1
VCNTL
VIN
POK
EN
NC
VOUT
GND
FB
APE8901
C2
C3
100uF 0.1uF
VIN=1.5V
Vout=1.2V/1A
R1
C6
1K
12~48nF
C4
C5
220uF 0.1u
R2
2K
2. Using an MLCC as the Output Capacitor
R3
1K
VCNTL=5V
U2
VCNTL
VIN
ON
OFF
C1
1uF
POK
EN
NC
VOUT
GND
FB
APE8901
VOUT=VFB x (1+R1/R2)
VFB =0.8V
C3
22uF
VIN=1.5V
R1
C6 C5
39K
56pF 22u
R2
78K
Vout=1.2V/1A
Data and specifications subject to change without notice
1
201010203