AP3410B [BCDSEMI]
1.5MHz Synchronous Step-down DC-DC Converter;
| 型号： | AP3410B |
| 厂家： | 
BCD SEMICONDUCTOR MANUFACTURING LIMITED |
| 描述： | 1.5MHz Synchronous Step-down DC-DC Converter |
| 文件： | 总12页 (文件大小：545K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Features
General Description
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High Efficiency Buck Power Converter
The AP3410B is a high efficiency step-down 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.
Wide Input Voltage Range: 2.5V to 5.5V
Adjustable Output Voltage: 0.6V to 0.9×VIN
Low RDS(ON) Internal Switches:200mΩ (VIN=5V)
Built-in Power Switches for Synchronous
Rectification with High Efficiency
Output Current: 1.2A
Feedback Voltage: 600mV
1.5MHz Constant Frequency Operation
Thermal Shutdown Protection
Low Dropout Operation at 100% Duty Cycle
No Schottky Diode Required
Input Over Voltage Protection
Output Over Voltage Protection
Over Current Protection
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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
version 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 1.2A.
Applications
The AP3410B is available in SOT-23-5 package.
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Post DC-DC Voltage Regulation
PDA and Notebook Computer
SOT-23-5
Figure 1. Package Type of AP3410B
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Pin Configuration
K Package
(SOT-23-5)
VIN
GND
EN
LX
FB
1
2
3
5
4
Figure 2. Pin Configuration of AP3410B (Top View)
Pin Description
Pin
Number
Pin Name
Function
1
2
3
4
5
VIN
GND
EN
Power supply
Ground pin
Chip enable pin. Active high
Feedback voltage of output
Switch output pin
FB
LX
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Functional Block Diagram
Figure 3. Functional Block Diagram of AP3410B
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Ordering Information
AP3410B
-
Circuit Type
G1: Green
Package
Blank: Tube
K: SOT-23-5
TR: Tape & Reel
Temperature
Range
Package
Part Number
Marking ID
Packing Type
AP3410BK-G1
AP3410BKTR-G1
G3U
G3U
Tube
SOT-23-5
-40 to 85ºC
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" in the part number, are RoHS compliant and
green.
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
VIN
Value
0 to 6.0
-0.3 to VIN+0.3
1.8
Unit
V
Input Voltage for the MOSFET Switch
Enable Input Voltage
VEN
V
LX Pin Switch Current
ILX
A
Power Dissipation (On PCB, TA=25°C)
PD
0.4
W
Thermal Resistance (Junction to Ambient,
Simulation)
Thermal Resistance (Junction to Case,
Simulation)
ºC/W
θJA
θJC
250
130
ºC/W
Operating Junction Temperature
Storage Temperature
TJ
155
-55 to 150
-40 to 85
200
ºC
ºC
ºC
V
TSTG
TOP
Operating Temperature
ESD (Machine Model)
VMM
VHBM
ESD (Human Body Model)
2000
V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
VIN
Min
2.5
Max
5.5
Unit
V
Supply Input Voltage
Operating Ambient Temperature
Operating Junction Temperature
TA
-40
85
ºC
TJ
-40
125
ºC
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Electrical Characteristics
VIN=VEN=5V, VOUT=1.2V, VFB=0.6V, L=2.2μH, CIN=4.7μF, COUT=10μF, TA=25°C, unless otherwise
specified.
Parameters
Symbol
VIN
Conditions
Min
Typ
Max
5.5
Unit
V
Input Voltage Range
Shutdown Current
Active Current
2.5
IOFF
VEN=0
0.1
μA
μA
V
ION
VFB=0.55V
220
0.6
Regulated Feedback
Voltage
Regulated Output
Voltage Accuracy
VFB
0.588
0.612
3
VIN=2.5V to 5.5V,
IOUT=0 to 1.2A
-3
%
A
ΔVOUT/VOUT
IPK
Peak Inductor Current
Oscillator Frequency
PMOSFET RDS(ON)
NMOSFET RDS(ON)
1.5
1.2
1.9
1.5
fOSC
VIN=2.5V to 5.5V
VIN=5V
1.8
MHz
mΩ
mΩ
V
RDS(ON)P
RDS(ON)N
VEN_H
200
200
VIN=5V
EN High Level Input
Voltage
1.5
EN Low Level Input
Voltage
VEN_L
IEN
0.4
0.1
V
EN Input Current
Soft Start Time
μA
μs
%
tSS
400
Maximum Duty Cycle
DMAX
100
Rising
2.3
2.1
0.2
155
Under Voltage Lock
Out Threshold
VUVLO
Falling
V
Hysteresis
Hysteresis=30°C
Thermal Shutdown
TSD
160
°C
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Typical Performance Characteristics
VIN=5V, TA=25°C, unless otherwise noted.
100
95
90
85
80
75
70
65
60
55
50
45
40
0.70
0.68
0.66
0.64
0.62
0.60
0.58
0.56
0.54
0.52
0.50
VIN=5.0V
VOUT=1.0V
VOUT=1.2V
VOUT=1.8V
VOUT=2.5V
VOUT=3.3V
VIN=5.0V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
-40
-20
0
20
40
60
80
100
120
140
Temperature (oC)
Output Current (A)
Figure 4. Efficiency vs. Output Current
Figure 5. Regulated Feedback Voltage vs. Temperature
VOUT_AC
10mV/div
VOUT_AC
10mV/div
VSW
2V/div
VSW
2V/div
IL
IL
1A/div
500mA/div
Time 400ns/div
Time 800μs/div
Figure 6. Output Ripple (IOUT=0A)
Figure 7. Output Ripple (IOUT=1.2A)
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Typical Performance Characteristics (Continued)
VIN=5V, TA=25°C, unless otherwise noted.
VEN
5V/div
VEN
5V/div
VSW
VSW
5V/div
5V/div
VOUT
1V/div
VOUT
1V/div
IL
IL
500mA/div
500mA/div
Time 800μs /div
Time 200μs/div
Figure 8. Enable Turn On (IOUT=1.2A)
Figure 9. Enable Turn Off (IOUT=1.2A)
VOUT
1V/div
VOUT
1V/div
VSW
VSW
5V/div
5V/div
IL
IL
2A/div
2A/div
Time 200μs /div
Time 200μs/div
Figure 10. Short Circuit Protection (IOUT=1.2A) Figure 11. Short Circuit Protection Recovery (IOUT=1.2A)
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Typical Application
Figure 12. Typical Application of AP3410B
Table 1. Component Guide
VOUT (V)
3.3
R1 (kΩ)
450
R2 (kΩ)
100
L (μH)
2.2
2.5
320
100
2.2
1.8
200
100
2.2
1.2
100
100
2.2
1.0
66
100
2.2
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Mechanical Dimensions
SOT-23-5
Unit: mm(inch)
2.820(0.111)
3.100(0.122)
0.100(0.004)
0.200(0.008)
0.200(0.008)
0.700(0.028)
REF
0.300(0.012)
0.500(0.020)
0°
8°
0.950(0.037)
TYP
1.800(0.071)
2.000(0.079)
0.000(0.000)
0.150(0.006)
0.900(0.035)
1.300(0.051)
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
Mounting Pad Layout
SOT-23-5
E2
G
Z
E1
Y
X
Z
G
X
Y
E1
E2
Dimensions
Value
(mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch)
3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037 1.900/0.075
Jun. 2013 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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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-
cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any
particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
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