Harman Kardon AVR 171/230, Service Manual

Page: 96 / 174

DB1514A
1.5A, Low Dropout Regulator with Power Good
Datasheet AT1514AF-00
16. Sep. 2010
1 of 10
DESCRIPTION
The DB1514A is a very low dropout voltage linear
regulator which can operate from the input
voltages as low as 2.5V and is capable of
delivering the continuous output load current up
to 1.5A.
It has a low dropout voltage (maximum 300mV at
1A), a very low quiescent current (typically 300uA
at 0.1A) and very high PSRR up to 86dB at 1A
load current.
The output voltage can be set from 0.5V to (VIN -
V
DRP
) with an external resistor divider and it has
±
2% accuracy through all temperature ranges
include the line as well as load variations.
It is allowed to use a small 4.7 μ F MLCC input and
output capacitor to deliver the current with the
stable operation.
An internal Soft-Start function reduces the inrush
current and the other features are include over
current protection (OCP), short-circuit protection
(SCP), and thermal shut down protection (TSD).
The DB1514A is available in 8-SOP-EP package
with exposed pad for optimal power dissipation
and 8-TDFN(3mmx3mm).
FEATURES
„
Input Voltage Range: 2.5V to 6.0V
„
Low Quiescent Current: Typ. 300uA @
„
Current limit : Min. 1.8A
„
Adjustable Output from 0.5V
„
DB1514A: Typ 0.4V Dropout @ I
OUT
=1.5A
Max 0.28V Dropout @ I
OUT
=1A
Max 0.2V Dropout @ I
OUT
=0.5A
„
Compatible with MLCC Capacitors
„
Soft-Start Limits Inrush Current
„
Thermal Shutdown Protection
„
Over Current & Short Circuit Protection
APPLICATIONS
„ TV & STB application
„ Servers
„ Networking
„ Notebook
„ Optical Modules
„ Post Regulators
ORDERING INFORMATION
PART NUMBER PACKAGE
DB1514AHETR 8-SOP-EP
DB1514ADLTR 8-TDFN(3x3)
TYPICAL APPLICATION
Harman Kardon AVR 171 Service Manual
Page 96 of 174