AP3407AKTR-G1 [BCDSEMI]
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter; 1.2A ， 1.4MHz的高效率同步DC-DC降压转换器
| 型号： | AP3407AKTR-G1 |
| 厂家： | 
BCD SEMICONDUCTOR MANUFACTURING LIMITED |
| 描述： | 1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter |
| 文件： | 总11页 (文件大小：336K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Features
General Description
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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
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.
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 AP3407/A. This feature greatly simplifies
the design of switch-mode power supplies.
The AP3407/A is available in SOT-23-5.
Applications
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Datacom
Portable Device
Smart Phone
SOT-23-5
Figure 1. Package Type of AP3407/A
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
1
Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Pin Configuration
K Package
(SOT-23-5)
1
2
3
5
VIN
GND
EN
SW
FB
1
2
3
5
EN
GND
SW
FB
4
VIN
4
(For AP3407)
(For AP3407A)
Figure 2. Pin Configuration of AP3407/A (Top View)
Pin Description
Pin Number
Pin Name
Function
AP3407
AP3407A
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 1.2A
1
3
EN
2
3
2
5
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
4
5
1
4
VIN
FB
greater ceramic capacitor
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.
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Functional Block Diagram
Figure 3. Functional Block Diagram of AP3407/A
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Ordering Information
AP3407
-
G1: Green
Circuit Type
TR: Tape & Reel
K: SOT-23-5
Blank: AP3407
A: AP3407A
Part Number
Green
AP3407KTR-G1
Marking ID
Temperature
Package
Packing Type
Range
Green
GJA
Tape & Reel
Tape & Reel
SOT-23-5
-40 to 85 ºC
AP3407AKTR-G1 GJB
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Input Voltage
VIN
VFB
VEN
VSW
-0.3 to 6.0
V
V
V
V
Feedback Voltage
EN Pin Voltage
SW Pin Voltage
-0.3 to VIN +0.3
-0.3 to VIN+0.3
-0.3 to VIN+0.3
Thermal Resistance
Thermal Resistance
Power Dissipation
265
60
0.377
ºC/W
ºC/W
W
θJA
θJC
PD
Operating Junction Temperature
Storage Temperature
TJ
150
-65 to 150
260
ºC
ºC
ºC
TSTG
TLEAD
Lead Temperature (Soldering, 10sec)
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.
Note 2: The junction temperature rise is given by TRISING=PD*θJA, where PD is the power dissipated by regulator,
θ
JA is the thermal resistance from junction of the die to the ambient temperature; The junction temperature, TJ is
given by TJ=TA+TR, where TA is the ambient temperature.
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Input Voltage
VIN
IOUT (MAX)
TA
2.5
1.2
-40
5.5
V
A
Maximum Output Current
Operating Ambient Temperature
85
ºC
Electrical Characteristics
VIN=VDD =VPVDD=3.3V, TA=25℃, unless otherwise specified.
Parameters
Input Voltage
Symbol
VIN
Conditions
Min
Typ
Max
5.5
Unit
2.5
V
Quiescent Current
IQ
VFB=0.65V
62
100
µA
Shutdown Supply Current
Reference Voltage
ISTBY
VREF
VEN=GND
0.1
1
µA
For Adjustable Output
Voltage
0.588
0.6
0.612
V
Feedback Bias Current
Output Voltage Accuracy
PMOSFET RON
IFB
VFB=VIN
-0.1
-2
0.1
2
µA
%
∆VOUT
0.28
RDS(ON)_ P
ISW = 200mA
Ω
0.25
2.0
NMOSFET RON
RDS(ON) _N
ILIM
ISW = -200mA
VFB=0.55V
Ω
1.5
1.5
A
Switch Current Limit
VH
EN Pin Threshold
V
V
VL
VUVLO
VHYS
fOSC
0.4
UVLO Threshold
UVLO Hysteresis
Oscillator Frequency
VDD Rising
2.3
0.2
1.12
100
1.40
1.68
0
MHz
%
Max. Duty Cycle
Min. Duty Cycle
DMAX
DMIN
VFB=0V
VFB=6.5V
N-MOS
Current
SW
Leakage
VIN=3.3V, VSW=3.3V
0.1
1
µA
ms
ºC
Soft-start Time
t
Thermal Shutdown
TOTSD
THYS
160
20
Thermal
Hysteresis
Shutdown
ºC
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Typical Performance Characteristics
100
95
96
90
85
80
88
75
70
65
80
60
VOUT=2.5V
55
IOUT=0.5A
50
VIN=3.3V
72
IOUT=1.0A
45
40
VOUT=2.5V
2
3
4
5
6
200
400
600
800
1000
1200
Input Voltage (V)
Output Current (mA)
Figure 4. Efficiency vs. Output Current
Figure 5. Efficiency vs. Input Voltage
1.8
1.7
1.6
1.5
1.4
1.3
2.51
2.50
2.49
2.48
2.47
VIN=3.3V
OUT=2.5V
IOUT=300mA
V
200
400
600
800
1000
1200
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Output Current (mA)
Input Voltage (V)
Figure 6. Output Voltage vs. Output Current
Figure 7. Frequency vs. Input Voltage
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Typical Performance Characteristics (Continued)
1.7
0.62
1.6
0.61
1.5
0.60
1.4
0.59
1.3
VIN=3.3V
0.58
0.57
V
OUT=2.5V
VIN=3.3V
120
1.2
-40
0
40
80
120
160
-40
0
40
80
160
Temperature (OC)
Temperature (OC)
Figure 8. Frequency vs. Temperature
Figure 9. Feedback Voltage vs. Temperature
2.2
2.0
1.8
1.6
1.4
1.2
0.5
0.4
0.3
0.2
0.1
VIN=3.3V
VIN=3.3V
VFB=0.55V
I
SW=200mA
0.0
-40
0
40
80
120
160
-40
0
40
80
120
160
Temperature (OC)
Temperature (OC)
Figure 10. OCP Current Limit vs. Temperature
Figure 11. RDS (ON)_UP vs. Temperature
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Typical Performance Characteristics (Continued)
0.32
0.28
0.24
0.20
0.16
VIN=3.3V
I
SW=200mA
0.12
-40
0
40
80
120
160
Temperature (OC)
Figure 12. RDS (ON)_LOW vs. Temperature
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
Typical Application
R2
R1
EN
VIN
FB
VOUT
VIN
L
SW
2.2 H
AP3407/A-ADJ
CIN
COUT
F
GND
F
Figure 13. Typical Application of AP3407/A
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
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)
Dec. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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