ap3409 BCD Semiconductor Manufacturing Limited, ap3409 Datasheet

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ap3409

Manufacturer Part Number
ap3409
Description
3a, 4mhz High Efficiency Synchronous Buck Converter
Manufacturer
BCD Semiconductor Manufacturing Limited
Datasheet

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Part Number:
ap3409DNTR-G1
Manufacturer:
BCD
Quantity:
16 240
Company:
Part Number:
ap3409DNTR-G1
Quantity:
75 000
General Description
The AP3409 is a current mode, PWM synchronous
buck DC/DC converter, capable of driving a 3A load
with high efficiency, excellent line and load
regulation. It operates in continuous PWM mode.
The AP3409 integrates synchronous P-channel and
N-channel power MOSFET switches with low
on-resistance. It is ideal for portable applications
powered from a single Li-ion battery. 100% duty
cycle and low on-resistance P-channel internal power
MOSFET can maximize the battery life.
The switching frequency of AP3409 can be
programmable from 300kHz to 4MHz, which allows
small-sized components, such as capacitors and
inductors
different manufacturers are available. This feature
greatly simplifies the design of switch-mode power
supplies.
The AP3409 is available in DFN-3×3-10 package.
Jul. 2010 Rev. 1. 0
3A, 4MHz High Efficiency Synchronous Buck Converter
.
A standard series of inductors from several
Figure 1. Package Type of AP3409
DFN-3×3-10
1
Features
Applications
Input Voltage Range: 2.6 to 5.5V
Current Mode Control
Forced Continuous-mode Operation
100% Duty Cycle
Built-in Soft-start
Built-in Short Circuit Protection
Built-in Thermal Shutdown Protection
DFN-3×3-10 package
Adjustable Output from 0.8 to 5V
Output Current: 3A
High Efficiency up to 95%
Built-in Current Limit Function
0.8V Reference Voltage with ± 2% Precision
Low R
Programmable Frequency: 300kHz to 4MHz
Portable Media Player
Digital Still and Video Cameras
Notebook
BCD Semiconductor Manufacturing Limited
DSON
Internal Switches
Preliminary Datasheet
AP3409

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ap3409 Summary of contents

Page 1

... High Efficiency Synchronous Buck Converter General Description The AP3409 is a current mode, PWM synchronous buck DC/DC converter, capable of driving a 3A load with high efficiency, excellent line and load regulation. It operates in continuous PWM mode. The AP3409 integrates synchronous P-channel and N-channel power MOSFET switches with low on-resistance ...

Page 2

... High Efficiency Synchronous Buck Converter Pin Configuration SHDN/RT PGND Figure 2. Pin Configuration of AP3409 (Top View) Pin Description Pin Pin Name Number 1 SHDN/RT 2 GND PGND 6, 7 PVDD 8 VDD COMP Jul. 2010 Rev Package (DFN-3×3-10) Pin 1 Dot ...

Page 3

... High Efficiency Synchronous Buck Converter Functional Block Diagram Figure 3. Functional Block Diagram of AP3409 Jul. 2010 Rev Preliminary Datasheet BCD Semiconductor Manufacturing Limited 3 AP3409 ...

Page 4

... Symbol PVDD COMP θ STG T LEAD BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet AP3409 G1: Green TR: Tape & Reel Packing Type Green Tape & Reel Value Unit - 110 º ...

Page 5

... No Switching Shutdown, I SHDN V =5. Rising UVLO DD V HUVLO =5.5V SHDN/ BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet AP3409 Max Unit 5 125 ºC Min Typ Max Unit 2.6 5.5 V µA 460 µA 1 2.2 V 300 mV 0.784 0.8 0.816 V µA 0.1 0.4 Ω 0.2 µ ...

Page 6

... FB I =500mA PDSON SW I =-500mA NDSON SW V =2 OUT V =2.5V OUT V =2.7 to 5.5V DD LNR I =100mA OUT LOD I =0. OUT =10mA OUT T OTSD T HYS 6 Preliminary Datasheet AP3409 Typ Max Unit 0.8 0.84 0.8 1 1.2 0.3 4 3.2 4.2 0.11 0.16 0.11 0.17 V -0 0.4 ±0.2 1.5 160 20 BCD Semiconductor Manufacturing Limited V MHz MHz % A Ω Ω ...

Page 7

... V =0.75V FB 100 -60 5.5 6.0 Figure 5. Supply Current vs. Ambient Temperature 140 120 100 80 =2.5V OUT V =5. =3.3V IN -60 3000 3500 Figure 7. PMOS ON Reisistance vs. 7 Preliminary Datasheet AP3409 V =3. =0.75V FB - 120 o Ambient Temperature ( C) V =3. =0.75V FB - 120 O Ambient Temperature ( ...

Page 8

... V =3. =0.85V FB 0.7 90 120 150 - Figure 9. Frequency vs. Ambient Temperature =3. =2.5V OUT 2 120 150 -60 Figure 11. Current Limit vs. Ambient Temperature 8 Preliminary Datasheet AP3409 V =3. =2.5V OUT - 120 O Ambient Temperature ( =3. =0.75V FB - 120 O Ambient Temperature ( C ) BCD Semiconductor Manufacturing Limited ...

Page 9

... Jul. 2010 Rev (AC) OUT 50mV/div I OUT 1A/div Figure 13. Load Transient Response =3A OUT 1V/div I OUT 1A/div Figure 15. Short Circuit Recovery BCD Semiconductor Manufacturing Limited 9 Preliminary Datasheet AP3409 Time 200µs/div =3.3V, V =2.5V, I =0.5 to 3A) OUT OUT Time 4ms/div (V =3.3V, V =2.5V) IN OUT ...

Page 10

... Typical Application 330k OSC SHDN/RT GND SW PGND Jul. 2010 Rev 30k COMP COMP FB VDD PVDD C1 22pF 2.0 H Figure 16. Typical Application of AP3409 10 Preliminary Datasheet AP3409 C 1000pF COMP R2 240k R1 510k V OUT 2.5V/3A C OUT 22 F ×2 BCD Semiconductor Manufacturing Limited ...

Page 11

... High Efficiency Synchronous Buck Converter Mechanical Dimensions Jul. 2010 Rev Preliminary Datasheet DFN-3×3-10 BCD Semiconductor Manufacturing Limited 11 AP3409 Unit: mm(inch) ...

Page 12

... BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. ...

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