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AOZ1031AI PDF даташит

Спецификация AOZ1031AI изготовлена ​​​​«Alpha & Omega Semiconductors» и имеет функцию, называемую «3A Synchronous Buck Regulator».

Детали детали

Номер произв AOZ1031AI
Описание 3A Synchronous Buck Regulator
Производители Alpha & Omega Semiconductors
логотип Alpha & Omega Semiconductors логотип 

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AOZ1031AI Даташит, Описание, Даташиты
AOZ1031AI
EZBuck™ 3A Synchronous Buck Regulator
General Description
The AOZ1031A is a high efficiency, easy to use, 3A
synchronous buck regulator. The AOZ1031A works from
4.5V to 18V input voltage range, and provides up to 3A of
continuous output current with an output voltage adjust-
able down to 0.8V.
The AOZ1031A comes in a SO-8 package and is rated
over a -40°C to +85°C operating ambient temperature
range.
Features
z 4.5V to 18V operating input voltage range
z Synchronous Buck: 80mΩ internal high-side switch
and 30mΩ internal low-side switch with integrated
schottky diode
z High efficiency: up to 95%
z Internal soft start
z Output voltage adjustable to 0.8V
z 3A continuous output current
z Fixed 600kHz PWM operation
z Pulse skipping at light load for high efficiency over
entire load range
z Cycle-by-cycle current limit
z Pre-bias start-up
z Short-circuit protection
z Thermal shutdown
z SO-8 package
Applications
z Point of load DC/DC converters
z LCD TV
z Set top boxes
z DVD/Blu-ray players/recorders
z Cable modems
z PCIe graphics cards
z Telecom/Networking/Datacom equipment
Typical Application
VIN
C1
22µF
RC
CC
VIN
EN
AOZ1031 LX
COMP
FB
AGND
PGND
L1 4.7µH
R1
R2
VOUT
C2, C3
22µF
Rev. 1.6 March 2010
Figure 1. 3.3V 3A Synchronous Buck Regulator
www.aosmd.com
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AOZ1031AI Даташит, Описание, Даташиты
AOZ1031AI
Ordering Information
Part Number
AOZ1031AI
Ambient Temperature Range
-40°C to +85°C
Package
SO-8
Environmental
RoHS Compliant
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
SO-8
(Top View)
8 LX
7 LX
6 EN
5 COMP
Pin Description
Pin Number Pin Name
1 PGND
2 VIN
3 AGND
4 FB
5 COMP
6 EN
7, 8 LX
Pin Function
Power ground. PGND needs to be electrically connected to AGND.
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.
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. Do not leave it open.
Switching node. PWM output connection to inductor.
Rev. 1.6 March 2010
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AOZ1031AI Даташит, Описание, Даташиты
Block Diagram
AOZ1031AI
VIN
EN
UVLO
5V LDO
Internal
OTP
& POR
Regulator
+5V
Reference
& Bias
Softstart
0.8V
FB
+
EAmp
COMP
Frequency
Foldback
Comparator
+
0.2V
0.96V
Over-Voltage
Protection
+ Comparator
+
PWM
Comp
+
ILimit
PWM
Control
Logic
600kHz
+
ISen
Level
Shifter
+
FET
Driver
Q1
Q2
LX
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
-3V for 20 nS
-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.
AGND
PGND
Recommend Operating Ratings
The device is not guaranteed to operate beyond the Maximum
Operating Ratings.
Parameter
Rating
Supply Voltage (VIN)
Output Voltage Range
Ambient Temperature (TA)
Package Thermal Resistance
SO-8 (ΘJA)
SO-8 (ΘJC)
Package Power Dissipation (PD) @
25°C Ambient
SO-8
4.5V to 18V
0.8V to VIN
-40°C to +85°C
87°C/W
30°C/W
1.15W
Rev. 1.6 March 2010
www.aosmd.com
Page 3 of 15










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AOZ1031AI3A Synchronous Buck RegulatorAlpha & Omega Semiconductors
Alpha & Omega Semiconductors

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