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PDF AUR9719 Data sheet ( Hoja de datos )
| Número de pieza | AUR9719 | |
| Descripción | STEP DOWN DC-DC CONVERTER | |
| Fabricantes | BCD | |
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Data Sheet
1.5MHz, 2A, STEP DOWN DC-DC CONVERTER
AUR9719
General Description
The AUR9719 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.
Integrated Soft Start (SS), Under Voltage Lock Out
(UVLO), Thermal Shutdown Detection (TSD) and
Short Circuit Protection are designed to provide
reliable product applications.
The device is available in adjustable output voltage
versions ranging from 0.8V to 9×VIN when input
voltage range is from 2.7V to 5.5V , and is able to
deliver up to 2.0A.
The AUR9719 is available in DFN-3×3-6 package.
Features
• High Efficiency Buck Power Converter
• Output Current: 2A
• Low RDS(ON) Internal Switch: 100mΩ
• Adjustable Output Voltage from 0.8V to 9×VIN
• Wide Operating Voltage Range: 2.7V to 5.5V
• Built-in Power Switches for Synchronous
Rectification with High Efficiency
• 800mV Feedback Voltage
• 1.5MHz Constant Frequency Operation
• 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
• PDA and Notebook Computers
DFN-3×3-6
Nov. 2011 Rev. 1. 0
Figure 1. Package Type of AUR9719
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
1.5MHz, 2A, STEP DOWN DC-DC CONVERTER
AUR9719
Electrical Characteristics
VIN_SW=VIN_A=VEN=5V, VOUT=1.2V, VFB=0.8V, L=3.3µH, CIN=4.7µF, COUT=22µF, 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
Symbol
VIN
IOFF
ION
VFB
∆VOUT
/VOUT
IPK
fOSC
Test Condition
VIN=VIN_SW=VIN_A
VEN=0V
VFB=0.95V
For Adjustable Output Voltage
VIN=2.7V to 5.5V, IOUT=10mA to
2A
Min
2.7
0.784
-3
2.2
1.2
Typ
4
460
0.8
3.2
1.5
Max
5.5
Unit
V
µA
µA
0.816 V
3%
A
1.8 MHz
PMOSFET RON
RON(P) ISW=0.75A
100 mΩ
NMOSFET RON
EN Input High
Threshold Voltage
EN Input Low
Threshold Voltage
EN Input Current
Soft-start Time
Maximum Duty
Cycle
Under Voltage Lock
Out Threshold
Thermal Shutdown
RON(N)
VEN_H
VEN_L
IEN
tSS
DMAX
VUVLO
TSD
ISW=0.75A
Rising
Falling
Hysteresis
Hysteresis=30°C
100 mΩ
1.5 V
0.4 V
2 µA
450 µs
90 %
2.4
2.3 V
0.1
150 °C
Nov. 2011 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
5
5 Page 
1.5MHz, 2A, STEP DOWN DC-DC CONVERTER
Typical Performance Characteristics (Continued)
Data Sheet
AUR9719
Figure 24. Output Ripple Voltage
(VIN=5.0V, VOUT=1.0V, IOUT=1.0A)
Figure 25. Output Ripple Voltage
(VIN=5.0V, VOUT =1.0V, IOUT=2.0A)
Figure 26. Output Ripple Voltage
(VIN=5.0V, VOUT=3.3V, IOUT=1.0A)
Nov. 2011 Rev. 1. 0
Figure 27. Output Ripple Voltage
( VIN=5.0V, VOUT=3.3V, IOUT=2.0A)
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet AUR9719.PDF ] | |
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