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PDF AUR9721 Data sheet ( Hoja de datos )
| Número de pieza | AUR9721 | |
| Descripción | Step-down DC-DC Converter | |
| Fabricantes | BCD | |
| Logotipo |  |
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Data Sheet
5V, 2A, 1.5MHz, Step-down DC-DC Converter
AUR9721
General Description
The AUR9721 is a high efficiency step-down
DC-DC voltage converter. The chip operation is
optimized by peak-current mode architecture with
built-in synchronous power MOS switchers. The
oscillator and timing capacitors are all built-in
providing an internal switching frequency of
1.5MHz that allows the use of small surface mount
inductors and capacitors for portable product
implementations.
Additional features including Soft Start (SS), Under
Voltage Lock Out (UVLO), Thermal Shutdown
Detection (TSD) and short circuit protection are
integrated to provide reliable product applications.
The device is available in adjustable output voltage
versions ranging from 0.8V to 0.9×VIN when input
voltage range is from 2.7V to 5.5V, and is able to
deliver up to 2A.
The AUR9721 is available in DFN-3×3-10 package.
Features
• High Efficiency Buck Power Converter
• Output Current: 2A
• Adjustable Output Voltage from 0.8V to 0.9×VIN
• Wide Operating Voltage Range: 2.7V to 5.5V
• Built-in Power Switches for Synchronous
Rectification with High Efficiency
• Feedback Voltage Allows Output: 800mV
• 1.5MHz Switching Frequency
• Thermal Shutdown Protection
• Low Drop-out Operation at 90% Duty Cycle
• No Schottky Diode Required
Applications
• LCD TV
• Set Top Box
• Post DC-DC Voltage Regulation
• PCI Card
• PDA and Notebook Computer
DFN-3×3-10
Figure 1. Package Type of AUR9721
Aug. 2012 Rev. 1.0
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
5V, 2A, 1.5MHz, Step-down DC-DC Converter
AUR9721
Electrical Characteristics
VIN=VEN=5V, VFB=0.8V, L=1.2µH, CIN=47µF, COUT=47µF, TA=25°C, unless otherwise specified.
Parameter
Input Voltage Range
Shutdown Current
Active Current
Regulated Feedback
Voltage
Regulated Output
Voltage Accuracy
Peak
Current
Inductor
Oscillator Frequency
PMOSFET RON
NMOSFET RON
EN Input Current
EN High-threshold
Input Voltage
EN Low-threshold
Input Voltage
Soft Start Time
Maximum
Cycle
Duty
Under Voltage Lock
Out Threshold
Thermal Shutdown
Symbol
VIN
IOFF
ION
VFB
∆VOUT/VOUT
IPK
fOSC
RON(P)
RON(N)
IEN
VEN_H
VEN_L
tSS
DMAX
VUVLO
TSD
Conditions
VEN=0V
VFB=0.95V
For Adjustable Output Voltage
VIN=2.7V to 5.5V,
IOUT=10mA to 2A
ISW=0.75A
ISW=0.75A
Rising
Falling
Hysteresis
Hysteresis=30°C
Min Typ Max Unit
2.7 5.5 V
0.1 1
460
µA
µA
0.784 0.8 0.816 V
-3 3 %
2.2 3.2
A
1.2 1.5 1.8 MHz
100 mΩ
100 mΩ
2 µA
1.5 V
0.4
800
90
2.4
2.3
0.1
150
V
µs
%
V
°C
Aug. 2012 Rev. 1.0
BCD Semiconductor Manufacturing Limited
5
5 Page 
5V, 2A, 1.5MHz, Step-down DC-DC Converter
Mechanical Dimensions
DFN-3×3-10
Data Sheet
AUR9721
Unit: mm(inch)
2.900(0. 114)
3.100(0. 122)
1.600(0. 063)
1.800(0. 071)
0.500(0. 020)
TYP
N6
0.300(0. 012)
0.500(0. 020)
N10
Pin 1 Mark
2.900(0. 114)
3.100(0. 122)
2.300(0. 090)
2.500(0. 098)
PIN#1 IDENTIFICATION
See DETAIL A
0. 700(0. 028)
0.800(0. 031)
0.000(0. 000)
0.050(0. 002)
N5
0.200(0. 008)
0.300(0. 012)
N1
DETAIL A
0.153(0. 006)
0.253(0. 010)
21
21
Pin 1 options
21
Aug. 2012 Rev. 1.0
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AUR9721.PDF ] | |
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