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電子部品 AP3419 Datasheet 詳細情報 ( 特性, スペック, ピン接続図 )

部品番号 AP3419
部品説明 2A STEP-DOWN DC-DC BUCK CONVERTER
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AP3419 Datasheet, AP3419 PDF,ピン配置, 機能
AP3419
1.0MHZ, 2A STEP-DOWN DC-DC BUCK CONVERTER
Description
The AP3419 is a 2A step-down DC-DC converter. At heavy load, the
constant frequency PWM control performs excellent stability and
transient response. No external compensation components are
required.
Pin Assignments
(Top View)
Pin 1 Mark
The AP3419 supports a range of input voltages from 2.7V to 5.5V,
allowing the use of a single Li+/Li- polymer cell, multiple
Alkaline/NiMH cell, and other standard power sources. The output
voltage is adjustable from 0.6V to the input voltage. The AP3419
employs internal power switch and synchronous rectifier to minimize
external part count and realize high efficiency. During shutdown, the
input is disconnected from the output and the shutdown current is less
than 1μA. Other key features include over-temperature and short
circuit protection, and under-voltage lockout to prevent deep battery
discharge.
The AP3419 delivers 2A maximum output current while consuming
only 90μA of no-load quiescent current. Ultra-low RDS(ON) integrated
MOSFETs and 100% duty cycle operation make the AP3419 an ideal
choice for high output voltage, high current applications which require
a low dropout threshold.
The AP3419 is available in TSOT26 package.
EN 1
GND 2
LX 3
6 FB
5 NC
4 VIN
TSOT26
Applications
5V or 3.3V Point of Load Conversion
Telecom/Networking Equipment
Set Top Boxes
Storage Equipment
Video Cards
DDR Power Supply
Features
Output Current: Up to 2A
Output Voltage: 0.6V to VIN
Input Voltage: 2.7V to 5.5V
Peak Efficiency Up to 95%
90μA (Typ) No Load Quiescent Current
Shutdown Current: <1μA
100% Duty Cycle Operation
1MHz Switching Frequency
Internal Soft Start
No External Compensation Required
Current Limit Protection
Thermal Shutdown
TSOT26 package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
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.
AP3419
Document number: DS36543 Rev. 3 - 2
1 of 9
www.diodes.com
August 2015
© Diodes Incorporated

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AP3419 pdf, 電子部品, 半導体, ピン配列
Functional Block Diagram
AP3419
1M OSC
FB 6
FREQ
SHIFT
VIN
1
EN 0.6V REF
SLOPE COMP
____
OSC
+
PWM
+ COMP
_
IAMP
_
EA
+
SQ
_
RQ
SWITCHING
LOGIC AND
BLOCKING
CIRCUIT
ANTI-
SHOOT
THRU
SHUTDOWN
4
VIN
3
LX
2
GND
Absolute Maximum Ratings (Note 4)
Symbol
Parameter
Rating
Unit
VIN
VEN
VLX
VFB
θJA
TJ
TSTG
TLEAD
VMM
VHBM
Input Voltage
EN Pin Voltage
LX Pin Voltage
Feedback Pin Voltage
Thermal Resistance (Junction to Ambient)
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 5 sec)
ESD (Machine Model)
ESD (Human Body Model)
-0.3 to 6
-0.3 to VIN+0.3
-0.3 to VIN+0.3
-0.3 to VIN+0.3
220
+150
-65 to +150
+300
200
2000
V
V
V
V
°C/W
°C
°C
°C
V
V
Note 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.
AP3419
Document number: DS36543 Rev. 3 - 2
3 of 9
www.diodes.com
August 2015
© Diodes Incorporated





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