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Buck Regulator. AOZ1034 Datasheet

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Buck Regulator. AOZ1034 Datasheet






AOZ1034 Regulator. Datasheet pdf. Equivalent




AOZ1034 Regulator. Datasheet pdf. Equivalent





Part

AOZ1034

Description

4A Synchronous Buck Regulator



Feature


AOZ1034 EZBuck™ 4A Synchronous Buck Re gulator General Description The AOZ1034 is a synchronous high efficiency, simp le to use, 4A buck regulator. The AOZ10 34 works from a 4.5V to 18V input volta ge range, and provides up to 4A of cont inuous output current with an output vo ltage adjustable down to 0.8V. The AOZ1 034 comes in both a 5x4 DFN-8 and an ex posed pad SO-8 packa.
Manufacture

Alpha & Omega Semiconductors

Datasheet
Download AOZ1034 Datasheet


Alpha & Omega Semiconductors AOZ1034

AOZ1034; ge and is rated over a -40°C to +85°C ambient temperature range. Features z 4.5V to 18V operating input voltage ran ge z Synchronous rectification: 60mΩ i nternal high-side z z z z z z z z z z switch and 20mΩ Internal low-side swit ch High efficiency: up to 95% Internal soft start Output voltage adjustable to 0.8V 4A continuous output current Fixe d 500kHz PWM operation.


Alpha & Omega Semiconductors AOZ1034

Cycle-by-cycle current limit Pre-bias s tart-up Short-circuit protection Therma l shutdown Thermally enhanced 5x4 DFN-8 and exposed pad SO-8 packages Applica tions z Point of load DC/DC conversion z PCIe graphics cards z Set top boxes z DVD drives and HDD z LCD panels z Cabl e modems z Telecom/Networking/Datacom e quipment Typical Application VIN C1 22 µF Ceramic VIN EN.


Alpha & Omega Semiconductors AOZ1034

COMP RC CC L1 4.7µH AOZ1034 LX R1 VOUT FB AGND PGND R2 C2, C3 22µF Cer amic Figure 1. 3.3V 4A Synchronous Buc k Regulator Rev. 1.1 September 2010 ww w.aosmd.com Page 1 of 18 Free Datashe et http://www.datasheet4u.com/ AOZ1034 Ordering Information Part Number AOZ10 34DI AOZ1034PI Ambient Temperature Ran ge -40°C to +85°C Package 5x4 DFN-8 Exposed Pad SO-8 Envi.

Part

AOZ1034

Description

4A Synchronous Buck Regulator



Feature


AOZ1034 EZBuck™ 4A Synchronous Buck Re gulator General Description The AOZ1034 is a synchronous high efficiency, simp le to use, 4A buck regulator. The AOZ10 34 works from a 4.5V to 18V input volta ge range, and provides up to 4A of cont inuous output current with an output vo ltage adjustable down to 0.8V. The AOZ1 034 comes in both a 5x4 DFN-8 and an ex posed pad SO-8 packa.
Manufacture

Alpha & Omega Semiconductors

Datasheet
Download AOZ1034 Datasheet




 AOZ1034
AOZ1034
EZBuck™ 4A Synchronous Buck Regulator
General Description
The AOZ1034 is a synchronous high efficiency, simple to
use, 4A buck regulator. The AOZ1034 works from a 4.5V
to 18V input voltage range, and provides up to 4A of
continuous output current with an output voltage
adjustable down to 0.8V.
The AOZ1034 comes in both a 5x4 DFN-8 and an
exposed pad SO-8 package and is rated over a
-40°C to +85°C ambient temperature range.
Features
z 4.5V to 18V operating input voltage range
z Synchronous rectification: 60mΩ internal high-side
switch and 20mΩ Internal low-side switch
z High efficiency: up to 95%
z Internal soft start
z Output voltage adjustable to 0.8V
z 4A continuous output current
z Fixed 500kHz PWM operation
z Cycle-by-cycle current limit
z Pre-bias start-up
z Short-circuit protection
z Thermal shutdown
z Thermally enhanced 5x4 DFN-8 and exposed pad
SO-8 packages
Applications
z Point of load DC/DC conversion
z PCIe graphics cards
z Set top boxes
z DVD drives and HDD
z LCD panels
z Cable modems
z Telecom/Networking/Datacom equipment
Typical Application
VIN
C1
22µF
Ceramic
RC
CC
VIN
EN AOZ1034 LX
COMP
AGND
FB
PGND
L1
4.7µH
VOUT
R1
C2, C3
22µF
Ceramic
R2
Rev. 1.1 September 2010
Figure 1. 3.3V 4A Synchronous Buck Regulator
www.aosmd.com
Page 1 of 18
Free Datasheet http://www.datasheet4u.com/




 AOZ1034
AOZ1034
Ordering Information
Part Number
AOZ1034DI
AOZ1034PI
Ambient Temperature Range
-40°C to +85°C
Package
5x4 DFN-8
Exposed Pad SO-8
Environmental
Green Product
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.
Pin Configuration
PGND 1
VIN 2
AGND 3
FB 4
LX
GND
8 LX
7 LX
6 EN
5 COMP
5x4 DFN-8
(Top View)
PGND 1
VIN 2
AGND 3
FB 4
PAD
(LX)
8 NC
7 NC
6 EN
5 COMP
Exposed Pad SO-8
(Top View)
Pin Description
Pin Number
5x4 DFN-8
Exposed
Pad SO-8
11
22
33
44
55
66
7, 8 Pad
7, 8
Pin Name
PGND
VIN
AGND
FB
COMP
EN
LX
NC
Pin Function
Power ground. Electrically needs to be connected to AGND.
Supply voltage input. When VIN rises above the UVLO threshold the
device starts up.
Reference connection for controller section. Also used as thermal
connection for controller section. Electrically needs to be connected
to PGND.
The FB pin is used to determine the output voltage via a resistor
divider between the output and GND.
External loop compensation pin.
The enable pin is active high. Connect it to VIN if not used and do
not leave it open.
PWM output connection to inductor.
No Connect. Pin 7 and 8 are not internally connected. Connect
these two pins externally to LX and use them for better thermal
performance.
Rev. 1.1 September 2010
www.aosmd.com
Page 2 of 18
Free Datasheet http://www.datasheet4u.com/




 AOZ1034
Block Diagram
AOZ1034
VIN
EN
UVLO
5V LDO
Internal
OTP
& POR
Regulator
+5V
Reference
& Bias
Softstart
0.8V
FB
+
EAmp
COMP
0.2V
Short Circuit
Detection
Comparator
+
+
PWM
Comp
+
ILimit
PWM
Control
Logic
500kHz
Oscillator
+
ISen
Level
Shifter
+
FET
Driver
Q1
Q2
LX
AGND
PGND
Absolute Maximum Ratings
Exceeding the Absolute Maximum ratings may damage the
device.
Parameter
Rating
Supply Voltage (VIN)
LX to AGND
LX to AGND
EN to AGND
FB to AGND
COMP to AGND
PGND to AGND
Junction Temperature (TJ)
Storage Temperature (TS)
ESD Rating(1)
20V
-0.7V to VIN+0.3V
23V (<50ns)
-0.3V to VIN+0.3V
-0.3V to 6V
-0.3V to 6V
-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: 1.5kΩ in series with 100pF.
Recommended Operating Conditions
The device is not guaranteed to operate beyond the Maximum
Recommended Operating Conditions.
Parameter
Rating
Supply Voltage (VIN)
Output Voltage Range
Ambient Temperature (TA)
Package Thermal Resistance (ΘJA)
5x4 DFN-8
Exposed Pad SO-8
4.5V to 18V
0.8V to VIN
-40°C to +85°C
50°C/W
50°C/W
Note:
2. The value of ΘJA is measured with the device mounted on 1-in2 FR-4
board with 2oz. Copper, in a still air environment with TA = 25°C. The
value in any given application depends on the user's specific board
design.
Rev. 1.1 September 2010
www.aosmd.com
Page 3 of 18
Free Datasheet http://www.datasheet4u.com/






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