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PDF AP6502A Data sheet ( Hoja de datos )
| Número de pieza | AP6502A | |
| Descripción | 240kHz 23V 2A SYNCHRONOUS DC/DC BUCK CONVERTER | |
| Fabricantes | Diodes | |
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AP6502A
240kHz 23V 2A SYNCHRONOUS DC/DC BUCK CONVERTER
Description
The AP6502A is a 240kHz switching frequency external compensated
synchronous DCDC buck converter. It has integrated low RDSON high
and low side MOSFETs.
The AP6502A enables continues load current of up to 2A with efficiency
as high as 95%.
The AP6502A features current mode control operation, which enables
fast transient response times and easy loop stabilization.
The AP6502A simplifies board layout and reduces space requirements
with its high level of integration and minimal need for external
components, making it ideal for distributed power architectures.
The AP6502A is available in a standard Green SO-8EP package with
an exposed PAD for improved thermal performance and is RoHS
compliant.
Pin Assignments
(Top View)
BS
IN
SW
GND
1
2
3
4
8 SS
7 EN
6 COMP
5 FB
SO-8EP
Figure 1. Package Pin Out
Features
Applications
VIN 4.75V to 23V
2A Continuous Output Current, 3A Peak
VOUT Adjustable to 0.925 to 20V
240kHz Switching Frequency
Programmable Soft-Start
Enable Pin
Protection
- OCP
- Thermal Shutdown
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Gaming Consoles
Flat Screen TV Sets and Monitors
Set Top Boxes
Distributed Power Systems
Home Audio
Consumer Electronics
Network Systems
FPGA, DSP and ASIC Supplies
Green Electronics
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds.
Typical Applications Circuit
100
90
80
VIN = 5V
VIN = 12V
70
60
50
VOUT = 3.3V
L = 10µH
40
0 0.4 0.8 1.2 1.6
LOAD CURRENT (A)
Efficiency vs. Load Current
2
INPUT
C1
10μF
21
IN BST
3
ON 7
SW
OFF EN AP6502A
8
C4 SS
0.1μF
5
FB
6
COMP
4
GND
C5
10nF L1
10μH
R1
26.1kΩ
R2
10kΩ
C3
6.8nF
R3
6.8kΩ
OUTPUT
VOUT
3.3V
C2
2 x 22μF
Figure 2. Typical Application Circuit
AP6502A
Document number: DS35812 Rev. 4 - 2
1 of 14
www.diodes.com
August 2015
© Diodes Incorporated
1 page  
AP6502A
Typical Performance Graphs (VIN = 12V, VOUT = 3.3V, TA = +25°C, unless otherwise specified.)
0.6 0.074
0.58
0.56
0.54
0.52
0.5
0.064
0.054
0.044
0.034
0.024
0.014
0.48
0 5 10 15 20
INPUT VOLTAGE (V)
Quiescent Supply Current vs. Input Voltage
6.2
6
5.8
5.6
5.4
5.2
5
4.8
-60
-40 -20 0 20 40 60 80
TEMPERATURE (C)
Current Limit vs. Temperature
100
0.92
0.918
0.916
0.914
0.912
0.91
0.908
0.906
0.904
0.902
0.9
-60
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
Feedback Voltage vs. Temperature
100
0.004
0 5 10 15 20
INPUT VOLTAGE (V)
Shutdown Supply Current vs. Input Voltage
3.33
3.329
3.328
3.327
3.326
VIN = 12V
3.325
3.324
3.323
3.322
3.321
3.32
4
10 15
INPUT VOLTAGE (V)
Line Regulation
20
255
250
245
240
235
230
225
-60
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Oscillator Frequency vs. Temperature
AP6502A
Document number: DS35812 Rev. 4 - 2
5 of 14
www.diodes.com
August 2015
© Diodes Incorporated
5 Page 
AP6502A
Application Information (cont.)
PC Board Layout
This is a high switching frequency converter. Hence attention must be paid to the switching currents interference in the layout. Switching current
from one power device to another can generate voltage transients across the impedances of the interconnecting bond wires and circuit traces.
These interconnecting impedances should be minimized by using wide, short printed circuit traces.
External feedback resistor
dividers must be placed
close to the FB
52mm
Input capacitor C1must be placed as
close as possible to the IC and to L1
AP6502ASP-13 is exposed at the bottom of the package and must be soldered directly to a well designed thermal pad on the PCB. This will help
to increase the power dissipation.
External Bootstrap Diode
It is recommended that an external bootstrap diode be added when the input voltage is no greater than 5V or the 5V rail is available in the
system. This helps to improve the efficiency of the regulator. This solution is also applicable for D > 65%. The bootstrap diode can be a low cost
one such as BAT54 or a Schottky that has a low VF.
BST 4
AP6502A
5V
BOOST
DIODE
10nF
SW 3
Figure 7. External Bootstrap Compensation Components
Recommended Diodes:
Part Number
B130
SK13
Voltage/Current
Rating
30V, 1A
30V, 1A
Vendor
Diodes Inc.
Diodes Inc.
AP6502A
Document number: DS35812 Rev. 4 - 2
11 of 14
www.diodes.com
August 2015
© Diodes Incorporated
11 Page | ||
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| PDF Descargar | [ Datasheet AP6502A.PDF ] | |
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