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PDF AP3427M Data sheet ( Hoja de datos )
| Número de pieza | AP3427M | |
| Descripción | 1.5MHZ Synchronous Step-down DC-DC Converter | |
| Fabricantes | BCD Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP3427M (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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Preliminary Datasheet
Dual 1A, 1.5MHZ Synchronous Step-down DC-DC Converter AP3427M
General Description
The AP3427M is a high efficiency step-down dual
channel DC-DC voltage converter. The chip
operation is optimized by peak-current mode
architecture with built-in synchronous power
MOSFET switchers. The oscillator and timing
capacitors are all built-in providing an internal
switching frequency of 1.5MHz that allows the use of
small surface mount inductors and capacitors for
portable product implementations.
Integrated Soft Start (SS), Under Voltage Lock Out
(UVLO), Thermal Shutdown Detection (TSD) and
Short Circuit Protection are designed to provide
reliable product applications.
The device is available in adjustable output voltage
ranging from 0.6V to 0.9×VIN when input voltage
range is from 2.5V to 5.5V, and is able to deliver up
to 1A.
The AP3427M is available in standard DFN-3×3-10
package.
Features
• High Efficiency Buck Power Converter
• Output Current: 1.0A
• Low RDS(ON) Internal Switches:200mΩ (VIN=5V)
• Adjustable Output Voltage from 0.6V to 0.9×VIN
• Wide Operating Voltage Range: 2.5V to 5.5V
• Built-in Power Switches for Synchronous
Rectification with High Efficiency
• Feedback Voltage: 600mV
• 1.5MHz Constant Frequency Operation
• Thermal Shutdown Protection
• Low Drop-out Operation at 100% Duty Cycle
• Input Over Voltage Protection
• No Schottky Diode Required
Applications
• Post DC-DC Voltage Regulation
• PDA and Notebook Computer
DFN-3×3-10
Figure 1. Package Type of AP3427M
Mar. 2013 Rev. 1.0
BCD Semiconductor Manufacturing Limited
1
1 page  
Preliminary Datasheet
Dual 1A, 1.5MHZ Synchronous Step-down DC-DC Converter AP3427M
Electrical Characteristics
TA=25°C, VIN=VIN1=VIN2=5V, VEN1=VEN2=5V, VFB1=VFB2=0.6V, L1=L2=2.2μH, CIN1=CIN2=4.7μF,
COUT1=COUT2=10μF, IMAX=1A per Channel, unless otherwise specified.
Parameter
Input Voltage Range
Shutdown Current
Active Current
Regulated Feedback
Voltage
Regulated Output
Voltage Accuracy
Peak Inductor Current
Oscillator Frequency
PMOSFET RDS(ON)
NMOSFET RDS(ON)
EN High-level Input
Voltage
EN Low-level Input
Voltage
EN Input Current
Soft Start Time
Maximum Duty Cycle
Input Over Voltage
Protection
Under Voltage Lock
Out Threshold
Thermal Shutdown
Symbol
Conditions
VIN
IOFF
ION
VFB
ΔVOUT/VOUT
IPK
VIN=VIN1=VIN2
VEN1=VEN2=0
VFB1=VFB2=0.7V,
IOUT1=IOUT2=0A
For Adjustable Output
Voltage
VIN=2.5V to 5.5V,
IOUT1 or IOUT2=0 to 1A
fOSC VIN=2.5V to 5.5V
RDS(ON)P
VIN=5V
RDS(ON)N
VIN=5V
VEN_H
VEN_L
IEN
tSS
DMAX
VIOVP
VUVLO
TSD
Rising
Falling
Hysteresis
Hysteresis=30°C
Min
2.5
0.588
-3
1.5
1.2
1.5
100
Typ
0.1
220
0.6
1.5
200
200
400
6.2
2.3
2.1
0.2
155
Max Units
5.5 V
1 μA
μA
0.612 V
3%
A
1.8 MHz
mΩ
mΩ
V
0.4 V
0.1 μA
μs
%
V
V
°C
Mar. 2013 Rev. 1.0
BCD Semiconductor Manufacturing Limited
5
5 Page 
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-
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11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AP3427M.PDF ] | |
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