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AP1512 Schematic ( PDF Datasheet ) - Diodes

Teilenummer AP1512
Beschreibung 2A/3A PWM BUCK DC/DC CONVERTER
Hersteller Diodes
Logo Diodes Logo 




Gesamt 12 Seiten
AP1512 Datasheet, Funktion
AP1512/A
50KHz, 2A/3A PWM BUCK DC/DC CONVERTER
Features
Output voltage: 3.3V, 5V, 12V and adjustable output
version
Adjustable version output voltage range, 1.23V to
37V+4%
50KHz +15% fixed switching frequency
Voltage mode non-synchronous PWM control
Thermal-shutdown and current-limit protection
ON/OFF shutdown control input
Operating voltage can be up to 60V
Output load current: 2A (for AP1512)
3A (for AP1512A)
Low power standby mode
Built-in switching transistor on chip
Lead Free Finish/ RoHS Compliant (Note 1)
General Description
The AP1512/A is a monolithic IC designed for use as a
step-down DC/DC converter with the ability of driving a 2A (3A for
AP1512A) load without additional transistor components. The
board space is reduced since AP1512/A requires few external
components. The external shutdown function is controlled by
logic level and can be put into standby mode. The internal
compensation ensures feedback control has good line and load
regulation without external design. Both an integrated Thermal
shutdown and Current Limit function are provided to prevent
damage from exceeding temperature operation and against
exceeding the current operating of the output switch. The
AP1512/A operates at a switching frequency of 50KHz thus
allowing smaller sized filter components than what would be
needed with lower frequency switching regulators. Other features
include a guaranteed +4% tolerance on output voltage under
specified input voltage and output load conditions, and +15%
tolerance on the oscillator frequency. The AP1512/A offers fixed
output voltages of 3.3V, 5V, 12V, plus Adjustable. The package is
available in a standard 5-lead TO263 package.
Applications
Simple High-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
Ordering Information
AP1512 X - XX XX X X
Part Number
Blank : 2A
A : 3A
Output Version
Blank : Adjustable
33 : 3.3V
50 : 5.0V
12 : 12V
Package
K5 : TO263-5L
Lead Free
Packing
L : Lead Free -U : Tube
-13 : Tape & Reel
Device
Package
Code
Packaging
(Note 2)
Tube
Quantity
Part Number
Suffix
13” Tape and Reel
Quantity
Part Number
Suffix
AP1512X-XXK5Lead-free
K5
TO263-5L
50
-U 800/Tape & Reel -13
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP1512/A Rev. 4
1 of 12
www.diodes.com
MAY 2008
© Diodes Incorporated






AP1512 Datasheet, Funktion
AP1512/A
50KHz, 2A/3A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics
AP1512A Current Limit vs. Temperature
( Vcc = 60V, Vout = 5V )
4
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3
-50
0
50 100 150
Temperature (TA) (°C)
AP1512A Efficiency vs. Supply Voltage
( Vout = 5V, Iout = 3A )
100
90
80
70
60
50
40
30
20
10
0
0
12 24 36 48
Supply Voltage(V)
60
AP1512 Efficiency vs. Temperature
( Vin = 12V, Vout = 5V, Io = 2A )
100
90
80
70
60
50
40
30
20
10
0
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
AP1512 Efficiency vs. Temperature
( Vin = 12V, Vout = 3.3V, Io = 2A )
100
90
80
70
60
50
40
30
20
10
0
-50 -30 -10 10 30 50 70 90 110 130 150
Temperature (TA) (°C)
AP1512 Supply Current vs. Temperature
( Vcc = 12V, No Load, Von/off = 0V (Switch ON), Von/off = 5V (Switch OFF))
8
7
6
Sw itch ON
5
4
3
2
1
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (TA) (°C)
100
90
80 Sw itch OFF
70
60
50
40
30
20
10
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (TA) (°C)
AP1512/A Rev. 4
6 of 12
www.diodes.com
MAY 2008
© Diodes Incorporated

6 Page









AP1512 pdf, datenblatt
AP1512/A
50KHz, 2A/3A PWM BUCK DC/DC CONVERTER
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
AP1512/A Rev. 4
12 of 12
www.diodes.com
MAY 2008
© Diodes Incorporated

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