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部品番号 AP3407A
部品説明 1.4MHZ HIGH EFFICIENCY SYNCHRONOUS DC-DC BUCK CONVERTER
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AP3407A Datasheet, AP3407A PDF,ピン配置, 機能
AP3407/A
1.2A, 1.4MHZ HIGH EFFICIENCY SYNCHRONOUS DC-DC BUCK CONVERTER
Description
The AP3407/A is a 1.4MHz fixed frequency, current mode, PWM
synchronous buck (step-down) DC-DC converter, capable of driving a
1.2A load with high efficiency, excellent line and load regulation. The
device integrates synchronous P-channel and N-channel power
MOSFET switches with low on-resistance. It is ideal for powering
portable equipment that runs from a single Li-ion battery.
A standard series of inductors are available from several different
manufacturers optimized for use with the AP3407/A. This feature
greatly simplifies the design of switch-mode power supplies.
The AP3407/A is available in SOT-23-5.
Features
Input Voltage Range: 2.5V to 5.5V
Output Voltage: 0.6V to VIN
ADJ Output
Fixed 1.4MHz Frequency
High Efficiency up to 95%
Output Current: 1.2A
Current Mode Control
100% Duty Cycle in Dropout
Built-in Over Current Protection
Built-in Short Circuit Protection
Built-in Thermal Shutdown Protection
Built-in UVLO Function
Built-in Soft-start
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(Top View)
EN 1
GND 2
SW 3
5 FB
4 VIN
SOT-23-5 for AP3407
(Top View)
VIN 1
GND 2
EN 3
5 SW
4 FB
SOT-23-5 for AP3407A
Applications
Datacom
Portable Device
Smart Phone
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
R2
R1
VIN EN FB
VINAP3407/A-ADJSW
CIN
4.7F
GND
L
2.2H
COUT
22F
VOUT
AP3407/A
Document number: DS37553 Rev. 2 - 2
1 of 10
www.diodes.com
May 2016
© Diodes Incorporated

--------------------------------------------
AP3407A pdf, 電子部品, 半導体, ピン配列
AP3407/A
Absolute Maximum Ratings (Note 4)
Symbol
Parameter
Rating
Unit
VIN Input Voltage
-0.3 to 6.0
V
VFB Feedback Voltage
-0.3 to VIN +0.3
V
VEN EN Pin Voltage
-0.3 to VIN+0.3
V
VSW SW Pin Voltage
θJA Thermal Resistance (Junction to Ambient)
θJC Thermal Resistance (Junction to Case)
-0.3 to VIN+0.3 (Note 6)
265
60
V
°C/W
°C/W
PD Power Dissipation
0.377
W
TJ Operating Junction Temperature (Note 5)
+150
°C
TSTG
Storage Temperature
-65 to +150
°C
Notes:
TLEAD
Lead Temperature (Soldering, 10sec)
+260
°C
4. 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.
5. The junction temperature rise is given by TRISING = PD*θJA, where PD is the power dissipated by regulator, θJA is the thermal resistance from junction of
the die to the ambient temperature; The junction temperature, TJ is given by TJ = TA+TR, where TA is the ambient temperature.
6. DC voltage rating, for short period of spike voltage, the minimum voltage rating is -1V, in 20nS.
Recommended Operating Conditions
Symbol
VIN
IOUT (MAX)
TA
Parameter
Input Voltage
Maximum Output Current
Operating Ambient Temperature
Min Max Unit
2.5 5.5 V
1.2 A
-40 +85 ºC
AP3407/A
Document number: DS37553 Rev. 2 - 2
3 of 10
www.diodes.com
May 2016
© Diodes Incorporated





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