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PDF AP3407A Data sheet ( Hoja de datos )
| Número de pieza | AP3407A | |
| Descripción | 1.4MHz High Efficiency Synchronous DC-DC Buck Converter | |
| Fabricantes | BCD Semiconductor | |
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
General Description
The AP3407/A 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 AP3407/A. This feature greatly simplifies
the design of switch-mode power supplies.
The AP3407/A is available in SOT-23-5.
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
Applications
• Datacom
• Portable Device
• Smart Phone
Dec. 2011 Rev. 1. 3
SOT-23-5
Figure 1. Package Type of AP3407/A
BCD Semiconductor Manufacturing Limited
1
1 page  
Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Recommended Operating Conditions
Parameter
Input Voltage
Maximum Output Current
Operating Ambient Temperature
Symbol
VIN
IOUT (MAX)
TA
Min
2.5
1.2
-40
Max
5.5
85
Unit
V
A
ºC
Electrical Characteristics
VIN=VDD =VPVDD=3.3V, TA=25℃, unless otherwise specified.
Parameters
Input Voltage
Quiescent Current
Shutdown Supply Current
Reference Voltage
Feedback Bias Current
Symbol
Conditions
Min Typ Max Unit
VIN
IQ VFB=0.65V
2.5 5.5 V
62 100 µA
ISTBY
VEN=GND
0.1 1 µA
VREF
For Adjustable Output
Voltage
0.588
0.6
0.612
V
IFB VFB=VIN
-0.1
0.1 µA
Output Voltage Accuracy
PMOSFET RON
∆VOUT
RDS(ON)_ P
ISW = 200mA
-2
0.28
2
%
Ω
NMOSFET RON
Switch Current Limit
EN Pin Threshold
RDS(ON) _N
ILIM
VH
VL
ISW = -200mA
VFB=0.55V
0.25
1.5 2.0
1.5
0.4
Ω
A
V
UVLO Threshold
UVLO Hysteresis
VUVLO
VHYS
VDD Rising
2.3
V
0.2
Oscillator Frequency
fOSC
1.12 1.40 1.68 MHz
Max. Duty Cycle
Min. Duty Cycle
DMAX
DMIN
VFB=0V
VFB=6.5V
100
%
0
N-MOS SW Leakage
Current
VIN=3.3V, VSW=3.3V
0.1
µA
Soft-start Time
t
1 ms
Thermal Shutdown
Thermal
Hysteresis
Shutdown
TOTSD
THYS
160 ºC
20 ºC
Dec. 2011 Rev. 1. 3
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 AP3407A.PDF ] | |
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