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LT3480HMSE#TRPBF

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IC REG BUCK ADJ 2A 10MSOP

Part Number: LT3480HMSE#TRPBF

Manufacturer: Analog Devices Inc.

Category: Voltage Regulators - DC DC Switching Regulators

Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad

Datasheet:: LT3480HMSE#TRPBF.pdf

Description: IC REG BUCK ADJ 2A 10MSOP

Select Quantity Stock: 14,956

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

LT3480HMSE#TRPBF 36V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current

A comprehensive technical overview of the LT3480HMSE#TRPBF, an adjustable frequency monolithic buck switching regulator from Analog Devices featuring a 3.6V to 36V input range (60V maximum transient), 2A maximum output current, 70µA quiescent current, Burst Mode® operation with output ripple below 15mV, an integrated boost Schottky diode, and a thermally enhanced 10-lead MSOP package with an exposed pad. The H-grade version is specified for operation from –40°C to +150°C junction temperature. Covers device function, core features, electrical specifications, pin configuration, typical applications, and replacement selection guidance.

Analog Devices 10-MSOP-EP (3mm × 3mm) 3.6V to 36V

Device Classification Step-Down Switching Regulator

Part Number: LT3480HMSE#TRPBF

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +150°C (T_J)

PRODUCT OVERVIEW

What Is the LT3480HMSE#TRPBF?

LT3480HMSE#TRPBF is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator from Analog Devices (Linear Technology) that accepts input voltages up to 36V, with a 60V maximum transient rating protected by overvoltage lockout. A high-efficiency 0.25Ω switch, a boost Schottky diode, and the necessary oscillator, control, and logic circuitry are integrated on the die[reference:0].

Current mode topology is used to achieve fast transient response and excellent loop stability. Low ripple Burst Mode® operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. Additionally, the LT3480 can further enhance low output current efficiency by drawing bias current from the output when V_OUT is above 3V[reference:1].

Shutdown mode reduces input supply current to less than 1µA, while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when V_OUT reaches 86% of the programmed output voltage. The device is available in a 10-lead MSOP package with an exposed pad for low thermal resistance[reference:2].

The LT3480HMSE#TRPBF is the H-grade version in a thermally enhanced 10-lead MSOP package (MSE), specified for operation from –40°C to +150°C junction temperature. The device is RoHS compliant, REACH unaffected, and in active production[reference:3].

Wide 3.6V to 36V Input Range Operates from 3.6V to 36V with overvoltage lockout protecting the circuit through 60V transients.

2A Output with 70µA Quiescent Current Delivers up to 2A output current while maintaining 70µA quiescent current (12V_IN to 3.3V_OUT) in Burst Mode® operation, with output ripple below 15mV.

Adjustable 200kHz to 2.4MHz Frequency A single resistor sets the switching frequency, with synchronization capability from 250kHz to 2MHz. Integrated boost Schottky diode reduces external component count.

DEVICE HIGHLIGHTS

Key Features and Benefits of LT3480HMSE#TRPBF

Wide 3.6V to 36V Input Range

Accepts input voltages from 3.6V to 36V, with overvoltage lockout that protects the circuit through 60V transients, making it suitable for automotive and industrial rails.

2A Output Current

The integrated 0.25Ω high-efficiency switch and current-mode topology deliver up to 2A of output current with fast transient response and good loop stability.

Low Ripple Burst Mode® (70µA I_Q)

70µA quiescent current (12V_IN to 3.3V_OUT) and output ripple below 15mV maintain high efficiency at low output currents for always-on and battery-powered systems.

Adjustable 200kHz to 2.4MHz Frequency

A single resistor on the RT pin sets the switching frequency from 200kHz to 2.4MHz. The SYNC pin allows synchronization to an external clock from 250kHz to 2MHz.

Integrated Boost Schottky Diode

The boost Schottky diode is integrated on the die, reducing external component count and simplifying the boost circuit for the internal NPN power switch.

H-Grade –40°C to +150°C

The H-grade version is specified for –40°C to +150°C junction temperature operation and is available in a thermally enhanced 10-lead MSOP package with an exposed pad.

REFERENCE DATA

Technical Specifications for LT3480HMSE#TRPBF

Part Number	LT3480HMSE#TRPBF	Manufacturer	Analog Devices
Device Type	Step-Down Switching Regulator	Topology	Buck
Input Voltage Range (V_IN)	3.6V to 36V (60V Maximum Transient)	Output Voltage Range (V_OUT)	0.79V to 20V (Adjustable)
Output Current (Max)	2A	Switching Frequency Range	200kHz to 2.4MHz
Synchronization Range	250kHz to 2MHz	Feedback Voltage Reference	0.790V
Quiescent Current (I_Q)	70µA (12V_IN to 3.3V_OUT)	Shutdown Current	< 1µA
Output Ripple (Burst Mode®)	< 15mV (Typical Application)	Switch On-Resistance	0.25Ω
Integrated Boost Diode	Yes	Power Good Flag	Signals When V_OUT Reaches 86% of Programmed Voltage
Soft-Start	Programmable via RUN/SS Pin (Resistor and Capacitor)	Control Mode	Current Mode
Package / Case	10-Lead MSOP with Exposed Pad (3mm × 3mm)	Supplier Device Package	MSOP-EP (MSE)
Pin Count	10 (Plus Exposed Pad)	Mounting Type	Surface Mount
Operating Junction Temperature (H-Grade)	-40°C to +150°C	RoHS	ROHS3 Compliant
REACH Status	REACH Unaffected	MSL Level	MSL 1 (Unlimited)
ECCN	EAR99	Product Status	Active
Packaging	Tape & Reel (2,500 per Reel)	Grade	H-Grade
Synchronous Rectifier	No (Internal NPN Power Switch)	External Catch Diode	Required

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for LT3480HMSE#TRPBF

Frequency, Soft-Start & Loop Compensation

The LT3480HMSE#TRPBF offers flexible configuration for switching frequency, soft-start, and compensation:

Switching Frequency (RT Pin): A resistor from RT to ground sets the switching frequency from 200kHz to 2.4MHz. This allows optimization of efficiency, external component size, and EMI.
Soft-Start (RUN/SS Pin): A resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp, reducing maximum input current during start-up. Tie to ground to shut down, or tie to 2.5V or more for normal operation[reference:4].
Loop Compensation (VC Pin): The VC pin is the output of the internal error amplifier. An external RC network from VC to ground compensates the control loop for stable operation[reference:5].
Output Voltage (FB Pin): Connect a resistor divider from V_OUT to the FB pin. The LT3480 regulates the FB pin to 0.790V[reference:6].
Synchronization (SYNC Pin): Ground the SYNC pin for Burst Mode® operation at light loads, or connect to an external clock (250kHz to 2MHz) for synchronization. Clock edges should have rise and fall times faster than 1µs[reference:7].

PCB and System-Level Guidance

Buck regulator performance depends on layout and component selection:

Input Capacitor: The V_IN pin must be locally bypassed with a low-ESR ceramic capacitor placed as close as possible to the pin[reference:8].
Catch Diode: An external catch diode is required. Connect the cathode to SW (Pin 3) and the anode to GND. The SW pin connects to the inductor, catch diode, and boost capacitor[reference:9].
Boost Capacitor: Connect a boost capacitor between the BOOST pin and SW pin to provide drive voltage higher than the input voltage for the internal NPN power switch[reference:10].
Exposed Pad: The exposed pad (Pin 11) is ground and must be soldered to the PCB for low thermal resistance[reference:11].
Power Good (PG Pin): The PG pin is an open collector output that remains low until the FB pin is within 14% of the final regulation voltage. It is valid when V_IN is above 3.6V and RUN/SS is high[reference:12].
Verify the recommended PCB footprint from the official datasheet prior to production.

10-LEAD MSOP WITH EXPOSED PAD (MSE)

Pin Configuration Reference for LT3480HMSE#TRPBF

LT3480

MSOP TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The MSOP package has 10 pins plus an exposed pad (Pin 11) with a 3mm × 3mm body size. The exposed pad must be soldered to the PCB for low thermal resistance.

1 BD Boost Diode Anode - Connects to the Anode of the Integrated Boost Schottky Diode; Also Supplies Current to the Internal Regulator

2 BOOST Boost Voltage - Provides Drive Voltage Higher Than V_IN to the Internal Bipolar NPN Power Switch

3 SW Switch Node - Output of the Internal Power Switch; Connect to Inductor, Catch Diode, and Boost Capacitor

4 V_IN Input Supply - Supplies Current to the Internal Regulator and Power Switch; Must Be Locally Bypassed

5 RUN/SS Run/Soft-Start - Tie to Ground to Shut Down; Tie to ≥2.5V for Normal Operation; Resistor and Capacitor Program Soft-Start

6 SYNC External Clock Synchronization Input - Ground for Burst Mode® Operation; Connect to Clock Source (250kHz to 2MHz) for Synchronization

7 PG Power Good - Open-Collector Output of Internal Comparator; Low Until FB Is Within 14% of Final Regulation Voltage

8 FB Feedback Input - Connect Resistor Divider Tap; Regulated to 0.790V

9 VC Error Amplifier Output - Voltage on This Pin Controls Peak Switch Current; Connect RC Network to Ground for Loop Compensation

10 RT Oscillator Resistor Input - Connect Resistor to Ground to Set Switching Frequency (200kHz to 2.4MHz)

11 GND Exposed Pad - Must Be Soldered to PCB for Low Thermal Resistance

APPLICATION AREAS

Typical Applications for LT3480HMSE#TRPBF

Automotive Battery Regulation

3.6V to 36V input with 60V transient protection and H-grade –40°C to +150°C operation suit automotive battery regulation and power conditioning.

Portable Product Power

70µA Burst Mode® quiescent current and high light-load efficiency extend battery life in portable instruments and battery-powered devices.

Distributed Power Regulation

High efficiency, 2A output capability, and adjustable frequency support distributed power architectures in telecom and datacom equipment.

Industrial Power

Wide input range, robust overvoltage protection, and H-grade temperature operation suit industrial control and automation power supplies.

Always-On Systems

Low shutdown current (<1µA) and Burst Mode® operation enable always-on system power rails with minimal standby power consumption.

Noise-Sensitive Applications

Output ripple below 15mV and external synchronization capability (250kHz to 2MHz) allow placement of switching harmonics away from critical bands.

REPLACEMENT GUIDANCE

Selecting an Alternative for LT3480HMSE#TRPBF

A replacement for the LT3480HMSE#TRPBF should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Analog Devices product pages and datasheets.

Topology: Step-Down Buck

Input voltage: 3.6V–36V (60V transient)

Output current: 2A

Switching frequency: 200kHz–2.4MHz

Quiescent current: 70µA

Package: 10-MSOP-EP

Temperature range: –40°C to 150°C (H-Grade)

Burst Mode® operation

Pin-to-pin and functionally compatible alternatives (same family, different temperature grade or packaging):

Part Number	Package	Temperature Range	Grade	Packaging
LT3480HMSE#TRPBF	10-MSOP-EP	–40°C to +150°C	H-Grade	Tape & Reel
LT3480HMSE#PBF	10-MSOP-EP	–40°C to +150°C	H-Grade	Tube
LT3480IMSE#TRPBF	10-MSOP-EP	–40°C to +125°C	I-Grade	Tape & Reel
LT3480EMSE#TRPBF	10-MSOP-EP	–40°C to +125°C	E-Grade	Tape & Reel
LT3480MPMSE#TRPBF	10-MSOP-EP	–55°C to +150°C	MP-Grade	Tape & Reel

All alternative part numbers listed above are documented in the official Analog Devices product pages and datasheets. The LT3480HMSE#TRPBF is the H-grade (–40°C to +150°C) version in a 10-lead MSOP package with an exposed pad and tape-and-reel packaging (2,500 units per reel). For tube packaging in the same grade, consider LT3480HMSE#PBF. For I-grade (–40°C to +125°C) operation, consider LT3480IMSE#TRPBF. For E-grade operation, consider LT3480EMSE#TRPBF. For MP-grade (–55°C to +150°C) operation, consider LT3480MPMSE#TRPBF. For the DFN package option, consider LT3480HUD#TRPBF. For different current ratings or input voltage ranges, consider LT3481 or LT3505. Select based on temperature grade, package, current requirement, and input voltage range.

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MANUFACTURER INFORMATION

Analog Devices

The LT3480 (LT3480HMSE#TRPBF) belongs to the LT3480 family of adjustable frequency monolithic buck switching regulators from Analog Devices (originally Linear Technology). The device integrates a 0.25Ω high-efficiency switch, a boost Schottky diode, and the necessary oscillator, control, and logic circuitry on a single die. It operates from a 3.6V to 36V input (60V maximum transient) and delivers up to 2A of output current. Current mode topology provides fast transient response, while low ripple Burst Mode® operation maintains high efficiency at low output currents with output ripple below 15mV. The LT3480 is available in 10-lead MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance, and is offered in E-grade, I-grade, H-grade, and MP-grade temperature versions. It is widely used in automotive battery regulation, portable product power, distributed power regulation, and industrial power applications.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: LT3480HMSE#TRPBF

Manufacturer: Analog Devices Inc.

Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad

Series: -

Package/Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad

Packaging: Tape & Reel (TR)

Product Status: Active

Function: Step-Down

Output Configuration: Positive

Topology: Buck

Output Type: Adjustable

Number of Outputs: 1

Voltage - Input (Min): 3.6V

Voltage - Input (Max): 36V

Voltage - Output (Min/Fixed): 0.79V

Voltage - Output (Max): 20V

Current - Output: 2A

Frequency - Switching: 200kHz ~ 2.4MHz

Synchronous Rectifier: No

Operating Temperature: -40°C ~ 150°C (TJ)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 10-MSOP-EP

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Submit an RFQ directly on this page with your required quantity, target price and delivery requirements. Our sales team will review the request and provide a quotation.

2. How does Haishengye Electronics verify the quality of LT3480HMSE#TRPBF?

We work with qualified suppliers and review sourcing channels, traceability, packaging and product condition before shipment.

3. Are the stock and price of LT3480HMSE#TRPBF updated in real time?

Electronic component inventory and prices may change frequently. Displayed values are references, and final stock and pricing will be confirmed in the quotation.

4. Which payment methods are supported?

Wire Transfer, PayPal, Alipay, WeChat, Credit Card, Western Union, MoneyGram and Escrow may be supported depending on the order and destination.

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6. What is the return or replacement process for LT3480HMSE#TRPBF?

Contact our sales team within the agreed period if there are quantity differences, incorrect items or clear external defects. Products should remain unused and in their original packaging.

7. Can I request technical support for LT3480HMSE#TRPBF?

Yes. Contact our team for datasheets, package details, product specifications, alternative parts and sourcing assistance.

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Part Number: LT3480HMSE#TRPBF

Manufacturer: Analog Devices Inc.

Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad

Category: Voltage Regulators - DC DC Switching Regulators

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