LTC3621HMS8E-3.3#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock

Name: LTC3621HMS8E-3.3#PBF
Brand: Analog Devices
SKU: LTC3621HMS8E-3.3#PBF
Availability: InStock

LTC3621HMS8E-3.3#PBF is a synchronous step-down switching regulator from Analog Devices with a fixed 3.3 V output, 1 A current capability, 1 MHz switching frequency, and 2.7 V to 17 V input range featuring ultralow quiescent current in an 8-pin MSOP-EP package. From $3.20, in stock, worldwide shipping.

ACTIVEIntegrated CircuitVerified Jun 2026

Package / Visual Reference

LTC3621HMS8E-3.3#PBFSmall Outline Packages

Quick Facts

Manufacturer: Analog Devices
Package: Small Outline Packages
Pin Count: 8
Lifecycle: ACTIVE
Datasheet: LTC3621HMS8E-3.3#PBF Datasheet PDF
Category: Integrated Circuit
Price: From $4.2200(MOQ 19)
Temp Range: -40.0°C to 150.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of LTC3621HMS8E-3.3#PBF?

Fixed 3.3 V output with 1 A continuous current supports standard logic, MCU, and RF module power rails directly
Ultralow quiescent current via pulse-skip mode extends battery life in always-on IoT and portable applications
1 MHz switching frequency reduces external inductor and capacitor size, enabling ultra-compact PCB footprints
Wide 2.7 V to 17 V input range accommodates Li-ion battery, 5 V USB, 12 V automotive, and industrial bus inputs
Synchronous rectification maximizes conversion efficiency, reducing heat generation at full 1 A load

What is LTC3621HMS8E-3.3#PBF used for?

The LTC3621HMS8E-3.3#PBF is ideal for battery-powered IoT devices, wearables, and wireless sensor nodes where its ultralow quiescent current in pulse-skip mode minimizes standby drain from Li-ion or primary cells. It efficiently powers 3.3 V microcontrollers, Bluetooth/Wi-Fi SoCs, and sensor front-ends from 12 V industrial rails or 2-cell Li-ion batteries within a small 8-pin MSOP-EP footprint. Its 1 MHz operation enables the use of sub-1 µH inductors and small ceramic capacitors, making it well-suited for space-constrained portable instruments and compact embedded systems.

What are the specifications of LTC3621HMS8E-3.3#PBF?

Pbfree Code	No
Manufacturer Package Code	05-08-1662
YTEOL	10
Analog IC - Other Type	SWITCHING REGULATOR
Control Mode	CURRENT-MODE
Control Technique	PULSE SKIP MODE
Input Voltage-Max	17V
Input Voltage-Min	2.7V
Input Voltage-Nom	12V
JESD-30 Code	S-PDSO-G8
JESD-609 Code	e3
Number of Functions	1
Output Current-Max	1A
Output Voltage-Max	3.35V
Output Voltage-Min	3.25V
Output Voltage-Nom	3.3V
Package Body Material	PLASTIC/EPOXY
Package Equivalence Code	TSSOP8,.19
Package Shape	SQUARE
Package Style	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Surface Mount	YES
Switcher Configuration	BUCK
Switching Frequency-Max	1160kHz
Technology	CMOS
Temperature Grade	AUTOMOTIVE
Terminal Finish	Matte Tin (Sn)
Terminal Form	GULL WING
Terminal Pitch	0.65mm
Terminal Position	DUAL
Package	Small Outline Packages

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
Moisture Sensitivity Level	MSL 1
ECCN	EAR99
HTS Code	8542.39.00.01

Where can I find the LTC3621HMS8E-3.3#PBF datasheet?

LTC3621HMS8E-3.3#PBF Datasheet Download

Official datasheet from Analog Devices

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Frequently Asked Questions

How does the LTC3621HMS8E-3.3#PBF's pulse-skip mode reduce quiescent current for battery-powered IoT devices?

In pulse-skip mode, the LTC3621HMS8E-3.3#PBF skips switching cycles when the load current falls below the inductor's peak current threshold, reducing switching losses dramatically. This lowers quiescent current to microamp levels at light loads, extending the runtime of battery-operated IoT nodes powered from 3 V to 17 V cells. At a 3.3 V output supplying a sleeping MCU drawing less than 1 mA, efficiency remains above 80%, versus much higher losses in continuous-conduction regulators.

What passive component sizes does the 1 MHz switching frequency of the LTC3621HMS8E-3.3#PBF enable in a compact design?

Operating at 1 MHz, the LTC3621HMS8E-3.3#PBF allows the use of a 2.2 µH to 4.7 µH inductor and 10 µF ceramic output capacitor, both in small 0402 or 0603 case sizes. This reduces total solution footprint to under 25 mm², compared to 100 kHz designs requiring 22 µH to 47 µH inductors in larger 1210 packages, making the LTC3621 well-suited for wearable and miniaturized embedded modules.

Which input voltage rails can the LTC3621HMS8E-3.3#PBF accept to produce a regulated 3.3 V output at 1 A?

The LTC3621HMS8E-3.3#PBF accepts input voltages from 2.7 V to 17 V, covering single-cell Li-ion (3.0 V to 4.2 V), 2-cell Li-ion (6 V to 8.4 V), USB 5 V, 9 V wall adapters, 12 V automotive or industrial bus voltages, and up to 17 V automotive crank transients. This single device consolidates multiple power-tree supply options into one fixed-output 3.3 V regulator, reducing BOM complexity.

How does the LTC3621HMS8E-3.3#PBF's synchronous rectification compare to a diode-rectified buck converter at 1 A output?

Synchronous rectification replaces the catch diode with a low-resistance MOSFET switch, reducing the rectifier voltage drop from approximately 0.4 V to 0.05 V at 1 A. This cuts conduction losses by up to 350 mW at full load, improving efficiency from approximately 85% to over 92% at a 12 V input and 3.3 V/1 A output, and significantly reducing PCB temperature rise in the 8-pin MSOP-EP package during continuous operation.

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About Analog Devices

Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.

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AvailabilityIn Stock

Reference Price (USD)

From $4.2200

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
19+	$5.5900	$106.21
100+	$5.0126	$501.26
250+	$4.5875	$1146.88
1000+	$4.2200	$4220.00

pcs

Unit price: $5.5900 · Total: $106.21

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Direct Contact

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

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Procurement Manager, VoltEdge Energy, India

LTC3621HMS8E-3.3#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock

What are the key features of LTC3621HMS8E-3.3#PBF?

What is LTC3621HMS8E-3.3#PBF used for?

What are the specifications of LTC3621HMS8E-3.3#PBF?

Compliance & Regulatory

Where can I find the LTC3621HMS8E-3.3#PBF datasheet?

What are equivalent replacements for LTC3621HMS8E-3.3#PBF?

Frequently Asked Questions

How does the LTC3621HMS8E-3.3#PBF's pulse-skip mode reduce quiescent current for battery-powered IoT devices?

What passive component sizes does the 1 MHz switching frequency of the LTC3621HMS8E-3.3#PBF enable in a compact design?

Which input voltage rails can the LTC3621HMS8E-3.3#PBF accept to produce a regulated 3.3 V output at 1 A?

How does the LTC3621HMS8E-3.3#PBF's synchronous rectification compare to a diode-rectified buck converter at 1 A output?

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