Product Information

AX3121ESA

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Datasheet
DC-DC Converters SOP-8L-EP RoHS
Manufacturer: Axelite



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From 0.4984

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AX3121ESA
Axelite

1 : $ 0.7796
10 : $ 0.5909
30 : $ 0.5554
100 : $ 0.5197
500 : $ 0.5055
1000 : $ 0.4984

     
Manufacturer
Axelite
Product Category
Isolated DC/DC Converters
Category
Isolated Dc/Dc Converters
Rohs
Y
Package
SOP-8L-EP
Brand Category
Axelite
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AX3121 3.5A Synchronous buck Converter GENERAL DESCRIPTION AX3121 consists of step-down switching regulator with synchronous PWM converter. These devise include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and NMOS etc. AX3121 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to the duty ratio linearly form 0 up to 100%. This converter also contains an error amplifier circuit as well as an enable/soft-start circuit that prevents overshoot at startup. An enable function, an over current protect function and short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced. Also, an external compensation is easily to system stable. With the addition of internal PMOS and NMOS, a coil and capacitors externally, these ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices when coupled with the SOP-8L-EP package, providing such outstanding features as low current consumption. Since this converter can accommodate an input voltage up to 23V. FEATURES - Input voltage 4.5V to 23V - Output voltage V to V FB CC - Duty ratio 0% to 100% PWM control - Oscillation frequency 250KHz typ. - Enable/Soft-Start and Current Limit (CL). - Thermal Shutdown function. - Short Circuit Protect (SCP). - Built-in internal SW P-channel and N-channel MOS. - SOP-8L with Exposed Pad Pb-Free package. - RoHS and Halogen free compliance. 1/12 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.5 Oct.16, 2019 AX3121 BLOCK DIAGRAM EN/SS PVcc SVcc 6uA 3.5V V EN CLM Soft-Start PMOS FB PWM Switched - Control Circuit SW NMOS 0.62V Thermal Oscillation PGND SGND Shutdown Circuit COMP PIN ASSIGNMENT The package of AX3121 is SOP-8L-EP; the pin assignment is given by: Name Description FB Feedback pin ( Top View ) ON/OFF Shutdown and Soft-start EN/SS EN/SS 1 8 pin COMP Compensation pin COMP 2 7 SGND FB Exposed PV Driver power supply pin Pad CC SVcc 3 6 PGND (SW) SVcc IC power supply pin PVcc 4 5 SW Switch pin. Connect external SW inductor here. SOP-8L-EP PGND Power ground pin SGND Signal ground pin ORDER/MARKING INFORMATION Order Information Top Marking (SOP-8L-EP) Logo AX 3 1 2 1 Part number AX3121 XX X YY WWX ID code:internal WW : 01~52 Year : 18=2018 19=2019 Packing Package Type 20=2020 Blank : Tube ES: SOP-8L-EP 21=2021 22=2022 A : Taping : 45=2045 2/12 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.5 Oct.16, 2019 + -

Tariff Concession Code
Tariff Desc

9601650
8504.40.90 POWER SUPPLIES, having BOTH:
(a) input voltages of 176V-246VAC, 47Hz-63Hz single phase OR 200V-230VAC, 50Hz-60Hz single phase
(b) multiple DC output voltages from minus 200 V to positive 200V
TC 9603032

8504.40.90 CHARGERS, ADAPTERS AND INVERTERS, AC/DC OR DC/DC OR DC/AC having ALL of the following:
(a) input voltage NOT less than 10V and NOT greater than 252V
(b) output voltage NOT less than 2V and NOT greater than 252V
(c) wattage NOT less than 40 W and NOT greater than 160W
(d) output current NOT greater than 17A - TC 1021920

8504.50.10 81
(a) designed for use with equipment of 8471
(b) for telecommunication apparatus of 8517 Free

8504.40.90 POWER SUPPLY UNITS, DC AND/OR AC output, complying with AS/NZS 60950 & AS/NZS CISPR 22, having ALL of:
(a) voltage NOT less than 2.5 V and NOT greater than 55V
(b) wattage NOT less than 0.02 W and NOT greater than 105W
(c) current output NOT less than 0.01 amp and NOT greater than 2.5amp
TC 1014564

8504.40.90 POWER SUPPLY MODULES having ALL of the following:
(a) input power at EITHER of the following voltages:
(i) 120VAC/240VAC
(ii) 24VDC /48VDC
(b) output power at EITHER of the following voltages:
(i) 5VDC, +15VDC, -15VDC, and 24VDC field I/O
(ii) 24VDC field I/O only
(c) circuitry monitors
(d) output adjusters
TC 9810001

8504.40.90 POWER SUPPLIES DC having BOTH:
(a) variable voltage NOT exceeding 30V
(b) maximum current output NOT exceeding 25amps
TC 9900597

8504.40.90 CONVERTERS, DC/DC, power output not exceeding 5W, being ANY of:
(a) single in line package
(b) dual in line
(c) surface mount device
TC 9601650

8543.90.20 20 Electronic microassemblies Free

8504.40.30 Static converters
(a) separately housed units, designed to be housed in the same cabinet as the central processing unit of equipment of 8471
(b) for telecommunication apparatus of 8517
60 No Electric current rectifying assemblies Free
63 No Other Free

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