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PDF AP3417B Data sheet ( Hoja de datos )
| Número de pieza | AP3417B | |
| Descripción | 1.4MHz High Efficiency Synchronous DC-DC Buck Converter | |
| Fabricantes | BCD Semiconductor | |
| Logotipo |  |
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3417B
General Description
The AP3417B is a 1.4MHz fixed frequency, current
mode, PWM synchronous buck (step-down) DC-DC
converter, capable of driving a 1.2A load with high
efficiency, excellent line and load regulation. The
device integrates synchronous P-channel and
N-channel power MOSFET switches with low
on-resistance. It is ideal for powering portable
equipment that runs from a single Li-ion battery.
A standard series of inductors are available from
several different manufacturers optimized for use
with the AP3417B. This feature greatly simplifies the
design of switch-mode power supplies.
The AP3417B is available in SOT-23-5 package.
Features
• Input Voltage Range: 2.5V to 5.5V
• Output Voltage: 0.6V to VIN
• ADJ Output
• Fixed 1.4MHz Frequency
• High Efficiency up to 95%
• Output Current: 1.2A
• Current Mode Control
• 100% Duty Cycle in Dropout
• Built-in Over Current Protection
• Built-in Short Circuit Protection
• Built-in Thermal Shutdown Protection
• Built-in UVLO Function
• Built-in Soft-start
• Built-in Input Over Voltage Protection (IOVP)
Applications
• Set-top Box
• Datacom
• Portable Device
• Smart Phone
Jan. 2013 Rev. 1. 0
SOT-23-5
Figure 1. Package Type of AP3417B
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3417B
Electrical Characteristics
VIN=5V, TA=25ºC, unless otherwise specified.
Parameters
Input Voltage
Quiescent Current
Shutdown Supply Current
Reference Voltage
Feedback Bias Current
PMOSFET RON
NMOSFET RON
Switch Current Limit
EN Pin Threshold
UVLO Threshold
UVLO Hysteresis
Oscillator Frequency
Max. Duty Cycle
Min. Duty Cycle
SW Leakage Current
Soft-start Time
Thermal Shutdown
Thermal
Hysteresis
Shutdown
Input OVP Threshold
Input OVP Hysteresis
Symbol
VIN
IQ
ISTBY
VREF
IFB_H
IFB_L
RDS(ON)_ P
RDS(ON) _N
ILIM
VH
VL
VUVLO
VHYS
fOSC
DMAX
DMIN
ISW_H
ISW_L
tSS
TOTSD
THYS
VIOVP
VIOVP_HYS
Conditions
VFB=0.65V
VEN=GND
VFB=1V
VFB=0V
ISW=200mA
ISW=-200mA
VFB=0.55V
VIN Rising
VSW=0V
VSW=5V
VIN Rising
Min Typ Max Unit
2.5 5.5 V
62 100 µA
0.1 1 µA
0.588 0.6 0.612
V
-0.1
-0.1
0.25
0.2
1.5 2.0
0.1
0.1
µA
Ω
Ω
A
1.5
V
0.4
2.3
V
0.2
1.12 1.40 1.68 MHz
100
%
0
0.1
µA
0.1
1 ms
160 ºC
20 ºC
6.3 V
0.5 V
Jan. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
5
5 Page 
Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3417B
Typical Application
Figure 22. Typical Application of AP3417B
Jan. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AP3417B.PDF ] | |
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