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PDF AP3203 Data sheet ( Hoja de datos )
| Número de pieza | AP3203 | |
| Descripción | 3A Asynchronous DC - DC Buck Converter | |
| Fabricantes | BCD | |
| Logotipo |  |
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Preliminary Datasheet
380kHz, 3A Asynchronous DC - DC Buck Converter
AP3203
General Description
The AP3203 is a 380kHz fixed frequency, current
mode, PWM buck (step-down) DC-DC converter,
capable of driving a 3A load with high efficiency,
excellent line and load regulation. The device
integrates N-channel power MOSFET switch with
low on-resistance. The current mode control provides
fast transient response and cycle-by-cycle current
limit.
A standard series of inductors are available from
several different manufacturers optimized for use
with the AP3203. This feature greatly simplifies the
design of switch-mode power supplies.
This IC is available in PSOP-8 package.
Features
• Input Voltage Range: 4.75V to 18V
• Fixed 380kHz Frequency
• High Efficiency: up to 93%
• Output Current: 3A
• Current Mode Control
• Built-in Over Current Protection
• Built-in Thermal Shutdown Function
• Built-in UVLO Function
• Built-in Over Voltage Protection
• Programmable Soft-start
Applications
• Portable DVD
• DPF
• LCD-TV
• STB
Mar. 2011 Rev. 1. 0
PSOP-8
Figure 1. Package Type of AP3203
BCD Semiconductor Manufacturing Limited
1
1 page  
Preliminary Datasheet
380kHz, 3A Asynchronous DC - DC Buck Converter
AP3203
Electrical Characteristics
VIN=VEN=12V, VOUT=3.3V, TA=25oC, unless otherwise specified. And those in boldface type apply over
the full operating temperature rang (TA=-40ºC to +85ºC).
Parameter
Input Voltage
Quiescent Current
Shutdown Supply Current
Feedback Voltage
Feedback Over Voltage
Threshold
Feedback SCP Voltage Threshold
Feedback Bias Current
Upper Switch On-resistance
Lower Switch On-resistance
High-side Switch Leakage
Current
High-side Switch Current Limit
Low-side Switch Current Limit
EN Pin Threshold
EN Pull-up Current
Input UVLO Threshold
Input UVLO Hysteresis
Oscillator Frequency
Short Circuit Oscillator
Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Error Amplifier Voltage Gain (Note 3)
Error Amplifier Transconductance
COMP to Current
Transconductance
Sense
Thermal Shutdown (Note 3)
Thermal Shutdown Hysteresis (Note
3)
Soft-start Time (Note 3)
Soft-start Current
Symbol
VIN
IQ
ISHDN
VFB
VFBOV
VFB_SCP
IFB
RDSONH
RDSONL
ILEAKH
ILIMH
ILIML
VENH
VENL
IEN_PH
VUVLO
VHYS
fOSC1
fOSC2
DMAX
DMIN
AEA
GEA
GCS
TOTSD
THYS
tSS
ISS
Conditions
VEN=2V,
VFB=1.35V
VEN=0V
VFB= 1V
ISW=0.5A
ISW=0.05A
VIN=18V, VEN=0V
VSW=0V
From Drain to
Source
VEN=0V
VIN Rising
VFB=1.0V
VFB=1.35V
C4=0.1µF,
IOUT=500mA
Min
4.75
1.185
-0.1
4
1.5
3.55
700
Typ
1.0
1
1.222
1.48
0.6
0.12
10
0.1
5.2
0.15
1.0
3.85
0.3
380
80
90
400
950
5.4
160
30
10
6
Max
18
1.5
10
1.258
0.1
10
0.5
4.15
0
1200
Unit
V
mA
µA
V
V
V
µA
Ω
Ω
µA
A
A
V
V
µA
V
V
kHz
kHz
%
%
V/V
µA/V
A/V
ºC
ºC
ms
µA
Mar. 2011 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
5
5 Page 
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
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11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AP3203.PDF ] | |
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