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PDF AP3211 Data sheet ( Hoja de datos )
| Número de pieza | AP3211 | |
| Descripción | 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER | |
| Fabricantes | BCD | |
| Logotipo |  |
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Data Sheet
1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211
General Description
The AP3211 is a 1.4MHz fixed frequency, current
mode, PWM buck (step-down) DC-DC converter,
capable of driving a 1.5A load with high efficiency,
excellent line and load regulation. The device
integrates N-channel power MOSFET switch with
low on-resistance. 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 AP3211. This feature greatly simplifies the
design of switch-mode power supplies.
The AP3211 is available in SOT-23-6 package.
Features
• Input Voltage Range: 4.5V to 18V
• Output Voltage Adjustable from 0.81V to 15V
• Fixed 1.4MHz Frequency
• High Efficiency: up to 92%
• Output Current: 1.5A
• Current Mode Control
• Built-in Over Current Protection
• Built-in Thermal Shutdown Function
• Built-in UVLO Function
• Built-in Over Voltage Protection
• Built-in Soft-start
Applications
• LCD TV
• DPF
• Portable DVD
SOT-23-6
Apr. 2013 Rev. 1. 4
Figure 1. Package Type of AP3211
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211
Electrical Characteristics
VIN=VEN=12V, VOUT=3.3V, TA=25ºC, unless otherwise specified.
Parameter
Input Voltage
Quiescent Current
Shutdown Supply Current
Feedback Voltage
Feedback Over Voltage Threshold
Feedback Bias Current
Switch On-resistance
Switch Leakage Current
Switch Current Limit
EN Pin Threshold
Input UVLO Threshold
Input UVLO Hysteresis
Oscillator Frequency
Max. Duty Cycle
Min. Duty Cycle
Minimum On Time
Thermal Shutdown
Thermal Shutdown Hysteresis
Soft-start Time
Symbol
VIN
IQ
ISHDN
VFB
VFBOV
IFB
RDSON
ILEAK
ILIM
VENH
VENL
VUVLO
VHYS
fOSC1
fOSC2
DMAX
DMIN
tON
TOTSD
THYS
tSS
Conditions
VFB=0.9V
VEN=0V
VFB=0.85V
ISW=1A
VIN=18V,
VEN=0V
VIN Rising
Short Circuit
VFB=0.6V
VFB=0.9V
Note 2: RDSON , tON, TOTSD, THYS and tSS are guaranteed by design.
Min Typ
4.5
0.8
0.1
0.785 0.810
0.972
-0.1
0.35
0.1
1.8 2.4
1.5
3.3 3.8
0.2
1.1 1.4
460
90
100
160
20
200
Max
18
1.1
1.0
0.835
0.1
10
0.4
4.3
1.7
0
Unit
V
mA
μA
V
V
μA
Ω
μA
A
V
V
V
MHz
kHz
%
%
ns
ºC
ºC
μs
Apr. 2013 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
5
5 Page 
Data Sheet
1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211
Mechanical Dimensions
SOT-23-6
Unit: mm(inch)
2.820(0.111)
3.100(0.122)
0.300(0.012)
0.500(0.020)
6 54
0.300(0.012)
0.600(0.024)
0°
8°
0.200(0.008)
Pin 1 Mark
12
3
0.950(0.037)TYP
1.800(0.071)
2.000(0.079)
0.700(0.028)REF
0.000(0.000)
0.150(0.006)
0.100(0.004)
0.200(0.008)
0.900(0.035) 1.450(0.057)
1.300(0.051)
MAX
Apr. 2013 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AP3211.PDF ] | |
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