ap1518t5ra ETC-unknow, ap1518t5ra Datasheet

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ap1518t5ra

Manufacturer Part Number
ap1518t5ra
Description
300khz, 3a Pwm Buck Dc/dc Converter
Manufacturer
ETC-unknow
Datasheet
1.AP1518T5RA.pdf (12 pages)
300KHz, 3A PWM Buck DC/DC Converter
- Adjustable version output voltage range, 0.8V to
- 300KHz +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 22V
- Output load current: 3A
- TO220-5L and TO263-5L Pb-Free packages
- Low power standby mode
- Built-in switching transistor on chip
- Simple High-efficiency step-down regulator
- On-card switching regulators
- Positive to negative converter
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
18V+4%
Pin Assignments
Features
Applications
Metal Tab GND
( Top View )
( Top View )
TO263-5L
TO220-5L
1 V
5 SD
3 Gnd
4 FB
2 Output
5 SD
4 FB
3 Gnd
2 Output
1 V
IN
IN
1/12
The AP1518 series are monolithic IC designed for a
step-down DC/DC converter, and own the ability of
driving a 3A load without external transistor. 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 to prevent over current operating
of the output switch.
occurred and V
switching frequency will be reduced. The AP1518
series operate at a switching frequency of 300KHz
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
packages are available in a standard 5-lead
TO-220 package or a 5-lead TO-263.
Output
Name
General Description
Pin Descriptions
GND
SD
V
FB
IN
Operating voltage input
Switching output
Output voltage feedback control
Ground
ON /OFF Shutdown
FB
is down to 0.5V below, the
Description
If current limit function
Rev.1.1 Oct 29, 2004
AP1518

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ap1518t5ra Summary of contents

Page 1

PWM Buck DC/DC Converter Features - Adjustable version output voltage range, 0.8V to 18V+4% - 300KHz +15% fixed switching frequency - Voltage mode non-synchronous PWM control - Thermal-shutdown and current-limit protection - ON /OFF shutdown control input - ...

Page 2

PWM Buck DC/DC Converter Ordering Information Block Diagram Current 0.8V Source Reference bias + Amp _ FB Anachip Corp. www.anachip.com.tw AP1518 X X Package Packing Blank : Tube T5: TO220-5L K5: TO263- Taping T5R: TO220-5L(R) SD ...

Page 3

PWM Buck DC/DC Converter Absolute Maximum Ratings Symbol Parameter V Supply Voltage /OFF Pin input voltage SD V Feedback Pin voltage FB V Output voltage to Ground OUT P Power dissipation D T Storage temperature ...

Page 4

PWM Buck DC/DC Converter Electrical Characteristics (Continued) Sym. Parameter Output V FB Feedback η Efficiency AP1518 η Efficiency η Efficiency η Efficiency Specifications with boldface type are for full operating temperature range, the other type are for T ...

Page 5

PWM Buck DC/DC Converter Typical Performance Characteristics AP1518 Efficiency v.s. Temperature (Vin=12V,Vout=5V,Io=3A -50 -30 - Temperature (TA) (°C) AP1518 Saturation Voltage v.s. ...

Page 6

PWM Buck DC/DC Converter Typical Performance Characteristics (Continued) AP1518 Threshold Voltage v.s. Temperature (Vcc=12V , Io=100mA) 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 -50 -30 - Temperature (TA) (°C) AP1518 Frequency ...

Page 7

PWM Buck DC/DC Converter Typical Application Circuit (1) Normal Circuit R2 12V DC Input Vin Cin Capacitor Vout = (2) Delay Start Circuit R2 12V DC Input Vin C DELAY 0.1uF ...

Page 8

PWM Buck DC/DC Converter Function Description Pin Functions +V IN 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 ...

Page 9

PWM Buck DC/DC Converter Function Description Package thermal resistance 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 ...

Page 10

PWM Buck DC/DC Converter Package Information (1) Package Type: TO220-5L Dimensions In Millimeters Symbol Min. A 4.07 b 0.76 C 0.36 D 14.22 E 9.78 e 1.57 e1 6.68 F 1.14 H1 5.46 J1 2.29 L 13.21 Øp ...

Page 11

PWM Buck DC/DC Converter Package Information (Continued) (2) Package Type: TO263- Dimensions In Millimeters Symbol Min. A 4.07 B 0.66 C 0.36 C2 1.14 D 8.65 E 9.78 e 1.57 L 14. ...

Page 12

PWM Buck DC/DC Converter Package Information (Continued) (3) Package Type: TO220-5L(R) Mechanical drawing Dimensions In Millimeters Symbol Min. A 4.4 b 0 9.91 e 1.6 F 1.2 ...

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