Diodes AP3410 User Manual
1.5MHz Synchronous Step-down DC-DC Converter AP3410
Preliminary Datasheet
General Description
The AP3410 is a high efficiency step-down DC-DC
voltage converter. The chip operation is optimized by
peak-current mode architecture with built-in
synchronous power MOSFET switchers. The
oscillator and timing capacitors are all built-in
providing an internal switching frequency of 1.5MHz
that allows the use of small surface mount inductors
and capacitors for portable product implementations.
Integrated Soft Start (SS), Under Voltage Lock Out
(UVLO), Thermal Shutdown Detection (TSD) and
Short Circuit Protection are designed to provide
reliable product applications.
The device is available in adjustable output voltage
version ranging from 0.6V to 0.9×V
voltage range is from 2.5V to 5.5V, and is able to
deliver up to 1.2A.
The AP3410 is available in SOT-23-5 and
DFN-2×2-6 packages.
when input
IN
Features
• High Efficiency Buck Power Converter
• Wide Input Voltage Range: 2.5V to 5.5V
• Adjustable Output Voltage: 0.6V to 0.9×V
• Low R
• Built-in Power Switches for Synchronous
Rectification with High Efficiency
• Output Current: 1.2A
• Feedback Voltage: 600mV
• 1.5MHz Constant Frequency Operation
• Thermal Shutdown Protection
• Low Dropout Operation at 100% Duty Cycle
• No Schottky Diode Required
• Input Over Voltage Protection
• Output Over Voltage Protection
• Over Current Protection
Internal Switches:200mΩ (VIN=5V)
DS(ON)
IN
Applications
• Post DC-DC Voltage Regulation
• PDA and Notebook Computer
SOT-23-5 DFN-2×2-6
Figure 1. Package Types of AP3410
Mar. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter AP3410
Pin Configuration
K Package DN Package
(SOT-23-5) (DFN-2×2-6)
EN
GND
LX
1
2
34
Pin Description
Pin Number
SOT-23-5 DFN-2×2-6
FB
5
VIN
Figure 2. Pin Configuration of AP3410 (Top View)
Pin Name Function
1 2 EN Chip enable pin. Active high
2 5 GND Ground pin
3 4 LX Switch output pin
4 3 VIN Power supply
5 6 FB Feedback voltage of output
1 NC No internal connection
Mar. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter AP3410
Functional Block Diagram
Figure 3. Functional Block Diagram of AP3410
Mar. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
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Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter AP3410
Ordering Information
AP3410 -
G1: Green
Circuit Type
K: SOT-23-5
DN: DFN-2×2-6
Package
SOT-23-5 -40 to 85ºC AP3410KTR-G1 GHW Tape & Reel
Temperature
Range
Part Number
TR: Tape & Reel
Marking
ID
Packing Type
DFN-2×2-6 -40 to 85ºC AP3410DNTR-G1 CJ Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Absolute Maximum Ratings (Note 1)
Parameter Symbol Value Unit
Input Voltage for the MOSFET Switch VIN 0 to 6.0 V
Enable Input Voltage VEN -0.3 to VIN+0.3 V
LX Pin Switch Current ILX 1.8 A
Power Dissipation (on PCB, TA=25°C) PD
Thermal Resistance (Junction to Ambient,
Simulation)
Thermal Resistance (Junction to Case,
Simulation)
Operating Junction Temperature TJ 155 ºC
Storage Temperature T
Operating Temperature TOP -40 to 85 ºC
ESD (Machine Model) VMM 200 V
ESD (Human Body Model) V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
θ
JA
θ
JC
-55 to 150 ºC
STG
2000 V
HBM
SOT-23-5 0.4
DFN-2×2-6 1.89
SOT-23-5
DFN-2×2-6
SOT-23-5 130 ºC/W
250
53
W
ºC/W
Mar. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
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