View AP1501A-XXK5L-13_4945989.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

AP1501A
150KHz, 5A 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% 150Khz +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 40V Output load current: 5A Low power standby mode Built-in switching transistor on chip Lead Free packages: TO263-5L and TO220-5L(R) TO263-5L and TO220-5L(R): Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1)
General Description
The AP1501A series are monolithic ICs that are designed for a step-down DC/DC converter, and possess the ability to drive a 5A load without additional transistor component. Due to reducing the number of external component, the board space can be saved easily. The external shutdown function can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control have good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. The AP1501A series operates at a switching frequency of 150Khz 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% on the oscillator frequency. The output version includes fixed 3.3V, 5V, 12V, and an adjustable type. The packages are available in a standard 5-lead TO263 and TO220 packages.
Applications
* * * Simple High-efficiency step-down regulator On-card switching regulators Positive to negative converter
Typical Application Circuit
(1) Fixed Type Circuit
FB 12V DC Input Vin Cin Capacitor 1 5 SD
4
AP1501A 2 -33 3
Output
L1 18uH Inductor D1 Schottky Diode
3.3V/5A Output Load
Gnd
Co Capacitor
AP1501A Rev. 10
DS31191
1 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Typical Application Circuit
(2) Adjustable Type Circuit
R2
(Continued)
R1 FB
12V DC Input Vin Cin Capacitor 1 5 SD
4 AP1501A 2 3 Gnd Output
L1 22uH
5V/ 5A Output Load
D1 Schottky Diode
Co Capacitor
Vout = VFB x (1 + VFB = 1.23V R2 = 1K ~ 3K
R1 R2
)
(3) Delay Start Circuit
R2 FB 12V DC Input Vin Cin Capacitor CDELAY 0.1uF 1 5 SD RDELAY 10K 4 AP1501A 2 3 Gnd D1 Schottky Diode Co Capacitor Output L1 22uH 5V/ 5A Output Load R1
AP1501A Rev. 10
DS31191
2 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Ordering Information
AP1501A - XX XXX X - X Output Version Blank : Adjustable 33 : 3.3V 50 : 5.0V 12 : 12V Package K5 : TO263-5L T5 : TO220-5L T5R : TO220-5L(R) Lead Free L : Lead Free G : Green Packing U : Tube 13 : Tape & Reel
Device
Lead-free
Package Code
K5 K5 K5 K5 T5 T5 T5R T5R
Packaging (Note 2)
TO263-5L TO263-5L TO263-5L TO263-5L TO220-5L TO220-5L TO220-5L(R) TO220-5L(R)
Quantity
50 NA 50 NA 50 50 50 50
Tube Part Number Suffix
-U NA -U NA -U -U -U -U
13" Tape and Reel Quantity Part Number Suffix
NA 800/Tape & Reel NA 800/Tape & Reel NA NA NA NA NA -13 NA -13 NA NA NA NA
Lead-free
Lead-free
Lead-free
AP1501A-XXK5L-U AP1501A-XXK5L-13 AP1501A-XXK5G-U AP1501A-XXK5G-13 AP1501A-XXT5L-U AP1501A-XXT5G-U AP1501A-XXT5RL-U AP1501A-XXT5RG-U
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html 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.
Pin Assignments
( Top View ) 5 SD 4 FB 3 Gnd 2 Output 1 VIN
Metal Tab GND
( Top View ) 5 SD 4 FB 3 Gnd 2 Output 1 VIN TO220-5L/TO220-5L(R)
TO263-5L
AP1501A Rev. 10
DS31191
3 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Pin Descriptions
Name VIN Output Gnd FB SD
Description Operating voltage input Switching output Ground Output voltage feedback control ON/OFF shutdown
Block Diagram
SD
VIN
200mV Current Source bias 1.235V Reference 2.5V Regulator Start up 220mV
+ Comp _
Comp +
FB
AP1501A Rev. 10
DS31191
4 of 14 www.diodes.com
_
+ Amp _
Freq. Compensation
Comp +
Pre-driver
150kHz OSC.
Thermal Shutdown
_
5A Switch
Output Gnd
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Absolute Maximum Ratings
Symbol ESD MM VCC VSD VFB VOUT PD TST TJ Supply Voltage ON/OFF Pin input voltage Feedback Pin voltage Output voltage to Ground Power dissipation Storage temperature Operating Junction Temperature Parameter Machine Model ESD Protection Rating 400 +45 -0.3 to +40 -0.3 to +40 -1 Internally limited -65 to +150 -20 to +125 Unit V V V V V W
o o
C C
Recommended Operating Conditions
Symbol VOP TA Parameter Operating voltage Operating Ambient Temperature Rating 4.5 to 40 -20 to 85 Units V
o
C
AP1501A Rev. 10
DS31191
5 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Electrical Characteristics
( All Output Voltage Versions )
Unless otherwise specified, VIN = 12V for 3.3V, 5V, adjustable version and VIN = 24V for the 12V version. ILOAD = 0.5A Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25C.
Symbol IFB FOSC VSAT DC ICL
Parameter Feedback Bias Current Oscillator Frequency Saturation Voltage Max. Duty Cycle(ON) Min. Duty Cycle(OFF) Current Limit Output = 0V Output Leakage Output = -1V Current Quiescent Current Standby Quiescent Current
Conditions VFB = 1.3V (Adjustable version only)
Min
Typ. 40
127 110 IOUT = 5A no outside circuit VFB = 0V force driver on VFB = 0V force driver on VFB = 12V force driver off peak current no outside circuit VFB = 0 force driver on no outside circuit VFB = 12 force driver off (Note 3) VIN = 40V VFB = 12 force driver off ON/OFF pin = 5V VIN = 40V
150
Max 60 100 173 173 1.6 1.7
Unit nA Khz V %
1.5 100 0
6.5 5.5 6.0 7.5 200 2 5 150 1.3 2.0 15 0.02 37
o
A uA mA mA uA V
IL IQ ISTBY VIL VIH IH IL
60 10 250 300 0.6
Low (regulator ON) ON/OFF Pin Logic Input Threshold Voltage High (regulator OFF) ON/OFF Pin Logic Input Current ON/OFF Pin Input Current Thermal Resistance Junction-to-Ambient VLOGIC = 2.5V (OFF) VLOGIC = 0.5V (ON) TO263-5L (Note 4) TO220-5L(R) (Note 4) TO263-5L (Note 4) TO220-5L(R) (Note 4)
25 uA 5
JA
C/W
31 6
o
JC
Notes:
Thermal Resistance Junction-to-Case
C/W
5
3. Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. 4. Test condition: Device mounted with copper area of approximately 3in2, 1oz, no air flow.
AP1501A Rev. 10
DS31191
6 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Electrical Characteristics
( Continued )
Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25C.
Symbol
VFB
Parameter Output Feedback Efficiency Output Voltage Efficiency Output Voltage Efficiency
Conditions 5V < VIN < 40V 0.2A < ILOAD < 5A VOUT programmed for 3V VIN = 12V, ILOAD=5A 5.5V < VIN < 40V 0.2A < ILOAD < 5A VIN = 12V, ILOAD=5A 8V < VIN < 40V 0.2A < ILOAD < 5A VIN = 12V, ILOAD = 5A
Typ. 1.23 72 3.3 71 5 78
Limit 1.193/1.18 1.267/1.28
Unit V VMIN VMAX %
AP1501A-ADJ
VOUT
AP1501A-3.3V
VOUT
3.168/3.135 3.432/3.465
V VMIN VMAX %
AP1501A-5V
4.8/4.75 5.2/5.25
V VMIN VMAX %
VOUT
AP1501A-12V
Output Voltage Efficiency
15V < VIN < 40V 0.2A < ILOAD < 5A VIN = 16V, ILOAD = 5A
12 88
11.52/11.4 12.48/12.6
V VMIN VMAX %
AP1501A Rev. 10
DS31191
7 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics
Typical Performance Characteristics Normalized Output Voltage
5.10
OUTPUT VOLTAGE CHANGE
VIN =20V, ILOAD=3A Normalized at TJ = 25C
Efficiency
100 95
EFFICIENCY (%)
5.05
90 85 80 75 70
5A Load
5.00
5V
4.95
3.3V
4.90 -50 -25 0 25 50 75 100 125
65 8 10 15 20 25 30 35 40
JUNCTION TEMPERATURE(C) INPUT VOLTAGE
Switch Saturation Voltage 1 : -40o C 2 : 25 o C 3 : 125o C
SWITCH CURRENT LIMIT (A)
Switch Current Limit
7.5
1.7
SATURATION VOLTAGE (V)
VIN =12V, V =5V OUT
7.0
1.6 1.5 1.4
6.5
1 1.3 1.2 3 2
6.0
5.5 2.0 3 4 5 -50 -25 0 25 50 75 100 125
SWITCH CURRENT(A) JUNCTION TEMPERATURE(C)
Operating Quiescent Current
25.0
SUPPLY CURRENT (mA)
Shutdown Quiescent Current
200.0 160.0
CURRENT (uA)
20.0 15.0
Switch ON
10.0 5.0 0.0 -50 -25 0 25 50 75 100 125
120.0 80.0 40.0 0.0
1 2 3
Switch OFF
V ON/OFF=5V 1 : -40 o C 2 : 25 o C 3 : 125 o C
10 20 30 40
JUNCTION TEMPERATURE(C)
SUPPLY VOLTAGE (V)
AP1501A Rev. 10
DS31191
8 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Typical Performance Characteristics
Minimum Operating Supply Voltage
5.0
(Continued)
ON/OFF Threshold Voltage
5.0
THRESHOLD VOLTAGE (V)
SUPPLY VOLTAGE (V)
4.0 3.0 2.0 1.0 0.0 -50 -25 0 25 50 75 100 125
4.0 3.0 2.0 1.0 0.0 -50 -25 0 25 50 75 100 125
VOUT=1.23V ILOAD=120mA
JUNCTION TEMPERATURE (oC)
JUNCTION TEMPERATURE (oC)
ON/OFF Pin Current (Sinking)
150.0
FREQUENCY (kHz)
Switch Frequency
200.0
120.0
CURRENT (uA)
VIN=40V -40oC TJ 125oC
150.0
90.0 60.0 30.0 0.0 1.4 5 10 15 20 22 23 24 25
ON/OFF PIN VOLTAGE (V)
100.0
50.0
0.0 -50 -25 0 25 50 75 100
o
125
JUNCTION TEMPERATURE ( C)
Feedback Pin Bias Current
50.0
BIAS CURRENT (nA)
40.0 30.0 20.0
Adjustable Version Only
10.0 0.0 -50 -25 0 25 50 75
o
100 125
JUNCTION TEMPERATURE( C)
AP1501A Rev. 10
DS31191
9 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Functional Description
Pin Functions +VIN This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. Ground Circuit ground. Output Internal switch. The voltage at this pin switches between (+VIN - VSAT) and approximately - 0.5V, with a duty cycle of approximately VOUT / VIN. To minimize coupling to sensitive circuitry, the PC board copper area connected to this pin should be kept a minimum. Feedback Senses the regulated output voltage to complete the feedback loop. ON/OFF Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 150uA. Pulling this pin below a threshold voltage of approximately 1.3V turns the regulator on, and pulling this pin above 1.3V (up to a maximum of 40V) shuts the regulator down. If this shutdown feature is not needed, the ON/OFF pin can be wired to the ground pin or it can be left open, in either case the regulator will be in the ON condition. Thermal Considerations The AP1501A is available in two packages, a 5-pin surface mount TO-263 and TO-220. The TO-220 package needs a heat sink under most conditions. The size of the heat sink depends on the input voltage, the output voltage, the load current and the ambient temperature. The AP1501A junction temperature rises above ambient temperature for a 5A load and different input and output voltages. The data for these curves was taken with the AP1501A (TO-220 package) operating as a buck switching regulator in o an ambient temperature of 25 C (still air). These temperature rise numbers are all approximate and there are many factors that can affect these temperatures. Higher ambient temperatures require more heat sinking. The TO-263 surface mount package tab is designed to be soldered to the copper on a printed circuit board. The copper and the board are the heat sink for this package and the other heat producing components, such as the catch diode and inductor. The PC board copper area that 2 the package is soldered to should be at least 0.8 in , and ideally should have 2 or more square inches of 2 oz. Additional copper area improves the thermal characteristics, but with copper areas greater than 2 approximately 6 in , only small improvements in heat dissipation are realized. If further thermal improvements are needed, double sided, multilayer PC boards with large copper areas and/or airflow are recommended. The AP1501A (TO-263 package) junction temperature rise above ambient temperature with a 2A load for various input and output voltages. This data was taken with the circuit operating as a buck switching regulator with all components mounted on a PC board to simulate the junction temperature under actual operating conditions. This curve can be used for a quick check for the approximate junction temperature for various conditions, but be aware that there are many factors that can affect the junction temperature. When load currents higher than 3A are used, double sided or multilayer PC boards with large copper areas and/or airflow might be needed, especially for high ambient temperatures and high output voltages. For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper should be used in the board layout. (Once exception to this is the output (switch) pin, which should not have large areas of copper.) Large areas of copper provide the best transfer of heat (lower thermal resistance) to the surrounding air, and moving air lowers the thermal resistance even further. Package thermal resistance and junction temperature rise numbers are all approximate, and there are many factors that will affect these numbers. Some of these factors include board size, shape, thickness, position, location, and even board temperature. Other factors are, trace width, total printed circuit copper area, copper thickness, single or double-sided, multilayer board and the amount of solder on the board. The effectiveness of the PC board to dissipate heat also depends on the size, quantity and spacing of other components on the board, as well as whether the surrounding air is still or moving. Furthermore, some of these components such as the catch diode will add heat to the PC board and the heat can vary as the input voltage changes. For the inductor, depending on the physical size, type of core material and the DC resistance, it could either act as a heat sink taking heat away from the board, or it could add heat to the board.
AP1501A Rev. 10
DS31191
10 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Marking Information
(1) TO263-5L
( Top View )
Logo Output Type : 1501A : ADJ 1501A33 : 3.3V 1501A50 : 5.0V 1501A12 : 12V
1501A XX YY WW X X
L : Lead Free G : Green ID code Xth week : 01~52 Year : "08" = 2008 "09" = 2009
~
(2) TO220-5L(R)
( Top View )
Logo Output Type : 1501A : ADJ 1501A33 : 3.3V 1501A50 : 5.0V 1501A12 : 12V
1501AXX YY WW X X
L : Lead Free G : Green ID code Xth week: 01~52 Year: "08" = 2008 "09" = 2009
~
AP1501A Rev. 10
DS31191
11 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Package Information
(1) Package Type: TO263-5L
(All Dimensions in mm)
(2) Package Type: TO220-5L
AP1501A Rev. 10
DS31191
12 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
Package Information
(Continued)
(3) Package Type: TO220-5L(R) Mechanical drawing
AP1501A Rev. 10
DS31191
13 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated
AP1501A
150KHz, 5A PWM BUCK DC/DC CONVERTER
IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein 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 Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright (c) 2009, Diodes Incorporated www.diodes.com
AP1501A Rev. 10
DS31191
14 of 14 www.diodes.com
SEPTEMBER 2009
(c) Diodes Incorporated

▲Up To Search▲

Price & Availability of AP1501A-XXK5L-13

	To Download AP1501A-XXK5L-13 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .