Buck Regulator. AOZ3019 Datasheet

AOZ3019 Regulator. Datasheet pdf. Equivalent

AOZ3019 Datasheet
Recommendation AOZ3019 Datasheet
Part AOZ3019
Description Buck Regulator
Feature AOZ3019; AOZ3019 EZBuck™ 6 A Synchronous Buck Regulator General Description The AOZ3019 is a high efficiency.
Manufacture Alpha & Omega Semiconductors
Datasheet
Download AOZ3019 Datasheet




Alpha & Omega Semiconductors AOZ3019
AOZ3019
EZBuck™ 6 A Synchronous Buck Regulator
General Description
The AOZ3019 is a high efficiency, easy to use, 6A
synchronous buck regulator. The AOZ3019 works from
4.5V to 18V input voltage range, and provides up to 6A of
continuous output current with an output voltage
adjustable down to 0.8V.
The AOZ3019 comes in a DFN5x6 package and is rated
over a -40°C to +85°C operating ambient temperature
range.
Features
4.5V to 18V operating input voltage range
Synchronous Buck: 30mΩ internal high-side switch
and 15mΩ internal low-side switch (at 12V)
Up to 95% efficiency
External soft start
Output voltage adjustable to 0.8V
6A continuous output current
500kHz PWM operation
Cycle-by-cycle current limit
Pre-bias start-up
Short-circuit protection
Thermal shutdown
DFN5x6 package
Applications
Point of load DC/DC converters
LCD TV
Set top boxes
DVD and Blu-ray players/recorders
Cable modems
Typical Application
VIN
C1
10µF
R
C
CSS
VIN SS
EN
AOZ3019 LX
COMP
AGND
FB
PGND
VOUT
L1
1µH R1
C2, C3
22µF
R2
Figure 1. 1.05V, 6A Synchronous Buck Regulator, Fs = 500kHz
Rev. 1.0 December 2015
www.aosmd.com
Page 1 of 14



Alpha & Omega Semiconductors AOZ3019
Ordering Information
Part Number
AOZ3019DI
Ambient Temperature Range
-40°C to +85°C
Package
DFN5x6
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/media/AOSGreenPolicy.pdf for additional information.
Pin Configuration
VIN 1
AGND 2
SS 3
FB 4
LX
DFN5x6-8
(Top View)
8 PGND
7 LX
6 EN
5 COMP
AOZ3019
Environmental
Green Product
Pin Description
Pin Number
1
Pin Name
VIN
2 AGND
3 SS
4 FB
5 COMP
6 EN
7
8
Exposed Pad
LX
PGND
LX
Pin Function
Supply voltage input. When VIN rises above the UVLO threshold and EN is logic high,
the device starts up.
Analog ground. AGND is the reference point for controller section. AGND needs to be
electrically connected to PGND.
Soft-start pin. 5μA current charging current.
Feedback input. The FB pin is used to set the output voltage via a resistive voltage divider
between the output and AGND.
External loop compensation pin. Connect a RC network between COMP and AGND to
compensate the control loop.
Enable pin. Pull EN to logic high to enable the device. Pull EN to logic low to disable the
device. If on/off control in not needed, connect EN to VIN and do not leave it open.
Switching node. LX is the drain of the internal power PFET.
Power ground. PGND needs to be electrically connected to AGND.
Switching node. LX is the drain of the internal power PFET. LX is used as the thermal pad
of the power stage.
Rev. 1.0 December 2015
www.aosmd.com
Page 2 of 14



Alpha & Omega Semiconductors AOZ3019
Block Diagram
AOZ3019
VIN
EN
UVLO
& POR
5V LDO
Regulator
Internal +5V
OTP
Reference
& Bias
Softstart
SS
0.8V
FB
ss
5µA
+
EAmp
+
PWM
Comp
+
ILimit
+
ISen
PWM
Control
Logic
Level
Shifter
+
FET
Driver
COMP
500kHz
Oscillator
Q1
Q2
LX
AGND
PGND
Absolute Maximum Ratings
Exceeding the Absolute Maximum Ratings may damage the
device.
Parameter
Supply Voltage (VIN)
LX to AGND
LX to AGND (20ns)
EN to AGND
FB, SS, COMP to AGND
PGND to AGND
Junction Temperature (TJ)
Storage Temperature (TS)
ESD Rating(1)
Rating
20V
-0.7V to VIN+0.3V
-5V to 22V
-0.3V to VIN+0.3V
-0.3V to 6.0V
-0.3V to +0.3V
+150°C
-65°C to +150°C
2.0kV
Note:
1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model rating: 1.5 kΩ in series with 100 pF.
Recommended Operating Conditions
The device is not guaranteed to operate beyond the Maximum
Recommended Operating Conditions.
Parameter
Supply Voltage (VIN)
Output Voltage Range
Ambient Temperature (TA)
Package Thermal Resistance
DFN5x6 (JA)
Rating
4.5V to 18V
0.8V to 0.85*VIN
-40°C to +85°C
40°C/W
Rev. 1.0 December 2015
www.aosmd.com
Page 3 of 14







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