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PDF AP3512E Data sheet ( Hoja de datos )
| Número de pieza | AP3512E | |
| Descripción | 2A Synchronous DC-DC Buck Converter | |
| Fabricantes | BCD | |
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Preliminary Datasheet
18V, 2A Synchronous DC-DC Buck Converter
AP3512E
General Description
The AP3512E is a 500kHz fixed frequency, current
mode, PWM synchronous buck (step-down) DC-DC
converter, capable of driving a 2A load with high
efficiency, excellent line and load regulation. The
AP3512E exhibits high efficiency at light load. 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.
The AP3512E employs complete protection to ensure
system security, including output Over Voltage
Protection, input Under Voltage Lock Out,
programmable Soft-start, Over Temperature
Protection and hiccup mode Short Circuit Protection.
This IC is available in SOIC-8 and PSOP-8 packages.
Features
• Input Voltage Range: 4.5V to 18V
• Fixed 500kHz Frequency
• High Efficiency at Light Load
• Output Current: 2A
• 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
• Hiccup Mode SCP
Applications
• Monitor
• TV
• STB
• Datacom
SOIC-8
PSOP-8
Figure 1. Package Types of AP3512E
Dec. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
1
1 page  
Preliminary Datasheet
18V, 2A Synchronous DC-DC Buck Converter
AP3512E
Electrical Characteristics
VIN=VEN=12V, VOUT=3.3V, TA=25ºC, unless otherwise specified.
Parameter
Symbol
SUPPLY VOLTAGE (IN PIN)
Input Voltage
Quiescent Current
Shutdown Supply Current
UNDER VOLTAGE LOCKOUT
Input UVLO Threshold
Input UVLO Hysteresis
ENABLE (EN PIN)
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysteresis (Note 2)
EN Lockout Threshold Voltage
EN Lockout Hysteresis
VIN
IQ
ISHDN
VUVLO
VHYS
VOLTAGE REFERENCE (FB PIN)
Feedback Voltage
Feedback Over Voltage Threshold
Feedback Bias Current
VFB
VFBOV
IFB
MOSFET
High-side Switch On-resistance
(Note 3)
Low-side Switch On-resistance
(Note 3)
RDSONH
RDSONL
CURRENT LIMIT
High-side Switch Leakage
Current
High-side Switch Current Limit
ILEAKH
ILIMH
Low-side Switch Current Limit
ILIML
SWITCHING REGULATOR
Oscillator Frequency
Short Circuit
Frequency
Oscillator
fOSC1
fOSC2
Conditions Min
VFB=1V,
VEN=3.3V
VEN=0V
4.5
VIN Rising
3.65
1.1
2.2
0.907
VFB=1V
-0.1
ISW=0.2A&0.7A
ISW=-0.2A&-0.7A
VIN=18V, VEN=0V,
VSW=0V
From drain to
source
4.3
410
Typ
1.2
0.1
4.0
0.2
1.5
350
2.5
210
0.925
1.1
100
100
0.1
5.6
50
500
180
Max Unit
18 V
1.4 mA
1.0 µA
4.25 V
V
2V
mV
2.7 V
mV
0.943
0.1
V
V
µA
mΩ
mΩ
10 μA
A
mA
590 kHz
kHz
Dec. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
5 Page 
18V, 2A Synchronous DC-DC Buck Converter
Mechanical Dimensions
SOIC-8
Preliminary Datasheet
AP3512E
Unit: mm(inch)
4.700(0.185)
5.100(0.201)
7°
1.350(0.053)
1.750(0.069)
0.320(0.013)
8°
7°
1.270(0.050)
TYP
0.100(0.004)
0.300(0.012)
0.675(0.027)
0.725(0.029)
8°
D 5.800(0.228)
6.200(0.244)
D
20:1 0.800(0.031)
0.200(0.008)
1.000(0.039)
3.800(0.150)
4.000(0.157)
0°
8°
0.330(0.013)
0.510(0.020)
0.190(0.007)
0.250(0.010)
0.900(0.035)
1°
5°
R0.150(0.006)
0.450(0.017)
0.800(0.031)
Note: Eject hole, oriented hole and mold mark is optional.
Dec. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AP3512E.PDF ] | |
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