AP3418 [BCDSEMI]
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter; 1.5A ， 1.4MHz的高效率同步DC-DC降压转换器
| 型号： | AP3418 |
| 厂家： | 
BCD SEMICONDUCTOR MANUFACTURING LIMITED |
| 描述： | 1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter |
| 文件： | 总12页 (文件大小：500K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Features
General Description
•
•
•
•
•
•
•
•
•
•
•
•
•
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: 1.5A
The AP3418 is a 1.4MHz fixed frequency, current
mode, PWM synchronous buck (step-down) DC-DC
converter, capable of driving a 1.5A 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.
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
A standard series of inductors are available from
several different manufacturers optimized for use
with the AP3418. This feature greatly simplifies the
design of switch-mode power supplies.
The AP3418 is available in SOT-23-5 package.
Applications
•
•
•
•
•
LCD TV
Set-top Box
Datacom
Portable Device
Smart Phone
SOT-23-5
Figure 1. Package Type of AP3418
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
1
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Pin Configuration
K Package
(SOT-23-5)
1
2
3
5
4
EN
GND
SW
FB
VIN
Figure 2. Pin Configuration of AP3418 (Top View)
Pin Description
Pin Number
Pin Name
Function
Control input pin. Forcing this pin above 1.5V enables the IC.
Forcing this pin below 0.4V shuts down the IC. When the IC is
in shutdown mode, all functions are disabled to decrease the
supply current below 1µA
1
EN
2
3
4
GND
SW
Ground pin
Power switch output pin. Inductor connection to drain of the
internal PFET and NFET switches
Supply input pin. Bypass to GND with a 4.7µF or greater
ceramic capacitor
VIN
This is the feedback pin of the device. Connect this pin directly
to the output if the fixed output voltage version is used. For the
adjustable version, an external resistor divider is connected to
this pin
5
FB
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
2
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Functional Block Diagram
Figure 3. Functional Block Diagram of AP3418
Ordering Information
AP3418
-
G1: Green
Circuit Type
K: SOT-23-5
TR: Tape & Reel
Temperature
Package
Part Number
Marking ID
Packing Type
Range
SOT-23-5
-40 to 85 ºC
AP3418KTR-G1
G5E
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
3
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
VIN
Value
-0.3 to 6.0
-0.3 to VIN +0.3
-0.3 to VIN+0.3
-0.3 to VIN+0.3
265
Unit
V
Input Voltage
Feedback Voltage
VFB
V
EN Pin Voltage
VEN
V
SW Pin Voltage
VSW
θJA
V
Thermal Resistance
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10sec)
ESD(Machine Model)
ESD(Human Body Model)
ºC/W
ºC
ºC
ºC
V
TJ
150
TSTG
TLEAD
-65 to 150
260
200
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
Input Voltage
Operating Ambient Temperature
TA
-40
85
ºC
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
4
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Electrical Characteristics
VIN=5V, TA=25ºC, unless otherwise specified.
Parameters
Symbol
VIN
Conditions
Min
Typ
Max
5.5
Unit
V
Input Voltage
2.5
Quiescent Current
Shutdown Supply Current
IQ
VFB=0.65V
62
100
1
µA
µA
V
ISTBY
VEN=GND
0.1
For Adjustable Output
Voltage
Reference Voltage
VREF
0.588
0.6
0.612
IFB_H
IFB_L
VFB=1V
-0.1
-0.1
0.1
0.1
Feedback Bias Current
µA
VFB=0V
0.2
0.15
2.3
PMOSFET RON
RDS(ON)_ P
RDS(ON) _N
ILIM
ISW = 200mA
ISW = -200mA
VFB=0.55V
Ω
NMOSFET RON
Switch Current Limit
Ω
1.8
1.5
A
VH
EN Pin Threshold
V
VL
0.4
UVLO Threshold
UVLO Hysteresis
Oscillator Frequency
Max. Duty Cycle
Min. Duty Cycle
VUVLO
VHYS
FOSC
VIN Rising
2.3
0.2
V
MHz
%
1.12
100
1.40
1.68
0
DMAX
DMIN
ISW_H
ISW_L
tSS
VSW =0V
VSW =5V
0.1
0.1
1
SW Leakage Current
µA
Soft-start Time
ms
ºC
Thermal Shutdown
TOTSD
160
Thermal
Hysteresis
Shutdown
THYS
20
ºC
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
5
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Typical Performance Characteristics
VIN=5V, TA=25ºC, unless otherwise specified.
100
100
95
VIN = 5.0V
95
90
VOUT =1.8V
85
90
80
85
75
70
80
65
75
60
55
70
VOUT = 1.8V
50
IOUT = 1.5A
65
45
40
60
0.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Input Voltage (V)
Output Current (A)
Figure 4. Efficiency vs. Output Current
Figure 5. Efficiency vs. Input Voltage
2.8
0.64
0.63
0.62
0.61
0.60
0.59
0.58
0.57
0.56
VIN = 5.0V
2.6
2.4
2.2
2.0
1.8
VIN = 5.0V
-40
-20
0
20
40
60
80
100
120
140
-40
-20
0
20
40
60
80
100
120
140
Temperature (oC)
Temperature (oC)
Figure 6. Reference Voltage vs. Temperature
Figure 7. Switch Current Limit vs. Temperature
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
6
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Typical Performance Characteristics (Continued)
VIN=5V, TA=25ºC, unless otherwise specified.
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
1.25
1.20
VIN = VEN = 5.0V
-40
-20
0
20
40
60
80
100
120
140
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Temperature (oC)
Input Voltage (V)
Figure 8. Frequency vs. Input Voltage
Figure 9. Frequency vs. Temperature
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.5
VIN = 5.0V
V
I
= 5.0V
IN
0.4
0.3
0.2
0.1
0.0
ISW = 200mA
= 200mA
SW
-40
-20
0
20
40
60
80
100
120
140
-40
-20
0
20
40
60
80
100
120
140
Temperature (oC)
Temperature (oC)
Figure 10. RDS (ON)_UP vs. Temperature
Figure 11. RDS (ON)_DOWN vs. Temperature
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
7
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Typical Performance Characteristics (Continued)
VIN=5V, TA=25ºC, unless otherwise specified.
VOUT_AC
10mV/div
VOUT_AC
10mV/div
VSW
2V/div
VSW
2V/div
IL
1A/div
IL
200mA/div
Time 1µs/div
Time 10ms/div
Figure 12. Output Ripple (IOUT=0A)
Figure 13. Output Ripple (IOUT=1.5A)
VEN
5V/div
VEN
5V/div
VOUT
1V/div
VOUT
1V/div
VSW
2V/div
VSW
2V/div
IL
1A/div
IL
1A/div
Time 200µs/div
Time 200µs/div
Figure 14. Enable Turn on (IOUT=1.5A)
Figure 15. Enable Turn off (IOUT=1.5A)
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
8
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Typical Performance Characteristics (Continued)
VIN=5V, TA=25ºC, unless otherwise specified.
VOUT
2V/div
VOUT
2V/div
VSW
VSW
5V/div
5V/div
IL
1A/div
IL
1A/div
Time 10ms/div
Time 10ms/div
Figure 16. Short Circuit Protection
(IOUT=1.5A)
Figure 17. Short Circuit Protection Recovery
(IOUT=1.5A)
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
9
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Typical Application
Figure 18. Typical Application of AP3418
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
10
Data Sheet
1.5A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3418
Mechanical Dimensions
SOT-23-5
Unit: mm(inch)
2.820(0.111)
3.020(0.119)
0.100(0.004)
0.200(0.008)
0.200(008)
0.700(0.028)
REF
0.300(0.012)
0.400(0.016)
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)
Aug. 2012 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
11
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
- Headquarters
- Wafer Fab
BCD Semiconductor Manufacturing Limited
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China
800 Yi Shan Road, Shanghai 200233, China
Tel: +86-21-24162266, Fax: +86-21-24162277
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
REGIONAL SALES OFFICE
Shenzhen Office
Taiwan Office
USA Office
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office
BCD Semiconductor (Taiwan) Company Limited
BCD Semiconductor Corp.
Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District, Shenzhen,
4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,
30920 Huntwood Ave. Hayward,
China
Taiwan
Tel: +886-2-2656 2808
CA 94544, USA
Tel: +86-755-8826 7951
Tel : +1-510-324-2988
Fax: +86-755-8826 7865
Fax: +886-2-2656 2806
Fax: +1-510-324-2788
相关型号：
©2020 ICPDF网 联系我们和版权申明