My Inquiry
My Account
Analog Devices Inc. LT3480EMSE#PBF
- Part No.:
- LT3480EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3480EMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 2A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,760
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3480EMSE#PBF from Analog Devices (formerly Linear Technology) is a 36V input, 2A monolithic step-down switching regulator with current-mode control, 2.4MHz max switching frequency, 70µA quiescent current in Burst Mode, and integrated boost Schottky diode - used for automotive battery regulation and portable power supplies.
For engineers reviewing the LT3480EMSE#PBF datasheet, LT3480EMSE#PBF pinout, LT3480EMSE#PBF application, or LT3480EMSE#PBF equivalent, key selection criteria include input voltage range (3.6–36V), output voltage adjustability (0.79V–20V), thermal performance in MSOP-10 package, and low-noise operation via programmable frequency and Burst Mode.
Technical Context
The LT3480EMSE#PBF implements constant-frequency current-mode PWM control with an internal 0.25Ω NPN switch, oscillator adjustable from 200kHz to 2.4MHz via RT resistor, and active soft-start via RUN/SS pin ramp. It features frequency foldback during startup/overload and automatic transition to low-ripple Burst Mode at light loads.
Its bias architecture draws current from VIN by default but switches to BD pin when VBD > 3V - enabling higher efficiency in regulated-output configurations. The power good (PG) flag asserts when FB reaches 86% of 0.790V reference, and overvoltage lockout disables switching above 38V (with 60V transient tolerance).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6V to 36V continuous; withstands 60V transients - supports 12V/24V automotive and industrial rails. |
| Max Output Current | 2A DC - sufficient for powering microcontrollers, FPGAs, and sensor subsystems. |
| Switching Frequency | 200kHz to 2.4MHz (RT-programmable) - enables compact magnetics and noise spectrum control. |
| Quiescent Current | 70µA at 12VIN/3.3VOUT in Burst Mode - extends battery life in always-on portable systems. |
| Feedback Reference | 0.790V ±10mV - allows precise output regulation from 0.79V to 20V using external resistive divider. |
| Switch On-Resistance | 0.25Ω typical - minimizes conduction loss and thermal rise at full load. |
| Shutdown Current | <1µA - enables ultra-low-power system-level sleep modes. |
| Power Good Threshold | 86% of feedback voltage (±12mV hysteresis) - provides reliable output monitoring without external comparators. |
Pinout & Package
The LT3480EMSE#PBF is housed in a thermally enhanced 10-lead MSOP package (3mm × 3mm footprint) with exposed pad (Pin 11) soldered to PCB ground for low θJA = 45°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BD (1) | Bias Diode Anode | Supplies internal regulator; connects to boost diode anode and optionally to VOUT ≥3V to reduce IQ. |
| BOOST (2) | Boost Drive | Provides >VIN voltage to saturate internal NPN switch; requires external capacitor/diode network. |
| SW (3) | Switch Node | High-side switch output; connects to inductor, catch diode cathode, and boost capacitor. |
| VIN (4) | Main Input Supply | Powers internal regulator and switch; must be locally bypassed with ≥4.7µF ceramic capacitor. |
| RUN/SS (5) | Enable & Soft-Start | Logic input (≥2.5V = on); RC ramp here controls output voltage slew rate during startup. |
| SYNC (6) | External Clock Input | Accepts 250kHz–2MHz clock for EMI reduction; grounded for Burst Mode operation. |
| PG (7) | Power Good Flag | Open-collector output asserting high when VOUT ≥86% of setpoint; requires pull-up resistor. |
| FB (8) | Feedback Input | Regulated to 0.790V; connects to resistor divider tap for output voltage programming. |
| VC (9) | Error Amplifier Output | Controls peak switch current; RC compensation network here stabilizes loop dynamics. |
| RT (10) | Frequency Set | Resistor-to-ground sets switching frequency (e.g., 8.66kΩ = 2.4MHz). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boost Schottky Diode | Eliminates external boost diode, reducing BOM count and layout area in buck converter designs. |
| Low-Ripple Burst Mode® Operation | Maintains <15mV output ripple at light loads while achieving 70µA IQ, critical for battery-powered IoT nodes. |
| Synchronizable Switching | Accepts external clock (250kHz–2MHz) to align switching edges - essential for multi-rail systems avoiding beat frequencies. |
| Overvoltage Lockout Protection | Disables switching above 38V (min 36V) while sustaining 60V transients - protects downstream circuitry in automotive environments. |
| Thermally Enhanced MSOP Package | Exposed pad (Pin 11 = GND) enables θJC = 10°C/W - supports 2A operation without heatsink in compact layouts. |
| Adjustable Soft-Start | RC network on RUN/SS pin controls output voltage ramp time - prevents inrush current and overshoot during power-up. |
Applications
| Automotive Battery Regulation | Portable Product Power |
|---|---|
Use Scenario: Regulating 12V/24V vehicle battery to 3.3V/5V for infotainment MCU and CAN transceivers under cold-crank (4.5V) and load-dump (60V) conditions. IC Role / Device Role / Timing Role: Primary buck controller providing stable, protected DC-DC conversion with OVP, thermal shutdown, and PG signaling. Use Value: Withstands 60V transients and operates down to 3.6V input - ensures uninterrupted operation across full automotive voltage envelope. | Use Scenario: Powering handheld medical monitors and industrial data loggers from single-cell Li-ion (3.0–4.2V) or dual-cell alkaline (1.8–3.2V) batteries. IC Role / Device Role / Timing Role: High-efficiency step-down regulator delivering 2A peak current with 70µA quiescent draw in standby. Use Value: Burst Mode extends battery runtime by >3× versus forced-continuous operation at sub-10mA loads. |
| Distributed Supply Regulation | Industrial Supplies |
Use Scenario: Local point-of-load regulation from 24V/48V backplane to 1.2V/1.8V for FPGA I/O banks and ADC/DAC analog supplies. IC Role / Device Role / Timing Role: Adjustable-frequency buck converter synchronized to system clock to minimize conducted EMI. Use Value: 200kHz–2.4MHz programmability allows optimization for size (high-freq) or efficiency (low-freq) per rail requirement. | Use Scenario: Providing isolated 5V/12V auxiliary power in PLC modules and motor drives where wide input range and reliability are mandatory. IC Role / Device Role / Timing Role: Robust primary regulator with –40°C to 125°C operating range, exposed-pad thermal path, and fault-flag reporting. Use Value: MSOP-10 package with soldered exposed pad achieves 2A output in <10mm² footprint - ideal for space-constrained industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3631EMSE#PBF | Higher 36V input rating, 1.5A output, no integrated boost diode, requires external bootstrap cap. | Lower output current; lacks BD pin bias optimization - less efficient at light loads. | Select when needing tighter output tolerance (±0.5%) or lower cost in lower-current designs. |
| MP2451DT-LF-Z | 36V input, 0.6A output, 2MHz fixed frequency, no PG flag or SYNC, smaller TSOT23-6 package. | Not suitable for 2A loads; missing power-good signaling and synchronization capability. | Select only for space-constrained, low-current applications where PG and SYNC are unnecessary. |
Compared with LTC3631EMSE#PBF and MP2451DT-LF-Z, the LT3480EMSE#PBF uniquely combines 2A output, integrated boost diode, programmable frequency, and PG flag in a thermally optimized MSOP - making it the preferred choice for demanding 12V/24V-to-3.3V/5V conversion where reliability and feature completeness matter.
Availability
LT3480EMSE#PBF is available at Aetrix Electronics and suitable for automotive battery regulation, portable product power, and distributed supply regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3480EMSE#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its high-performance power management portfolio with rigorous qualification standards.
The LT3480 series was designed specifically for rugged, wide-input DC-DC conversion in automotive, industrial, and portable systems - emphasizing transient robustness, low quiescent current, and thermal efficiency in compact packages.
FAQ
What is the maximum input voltage the LT3480EMSE#PBF can safely handle?
The LT3480EMSE#PBF operates continuously up to 36V input and withstands non-repetitive transients up to 60V. Its overvoltage lockout activates at ~38V (min 36V), disabling switching to protect internal circuitry while maintaining safe biasing. This makes the LT3480EMSE#PBF suitable for automotive applications subject to load-dump events.
How does the LT3480EMSE#PBF achieve 70µA quiescent current?
The LT3480EMSE#PBF achieves 70µA quiescent current through low-ripple Burst Mode® operation: during light loads, it shuts down all control circuitry between energy bursts, minimizing switching losses and bias current. This mode is automatic and maintains output ripple below 15mV - a key advantage of the LT3480EMSE#PBF over standard pulse-skipping regulators.
Can the LT3480EMSE#PBF synchronize to an external clock?
Yes, the LT3480EMSE#PBF supports external clock synchronization via the SYNC pin (Pin 6), accepting frequencies from 250kHz to 2MHz with fast edge requirements (<1µs rise/fall). When SYNC is grounded, the device defaults to low-ripple Burst Mode operation - giving designers flexibility to manage EMI in dense multi-rail systems using the LT3480EMSE#PBF.
What package type and thermal characteristics does the LT3480EMSE#PBF use?
The LT3480EMSE#PBF uses a 10-lead plastic MSOP package with exposed pad (Pin 11 = GND), offering θJA = 45°C/W and θJC = 10°C/W. The exposed pad must be soldered to PCB ground plane to realize full thermal performance - enabling 2A continuous output without heatsink in ambient temperatures up to 85°C.
Does the LT3480EMSE#PBF require an external boost diode?
No, the LT3480EMSE#PBF integrates a boost Schottky diode on-die, eliminating the need for an external component. The BD pin (Pin 1) connects directly to the anode of this internal diode and also supplies bias current to the internal regulator - simplifying design and reducing board area compared to controllers requiring external bootstrap networks.
LT3480EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT3480EMSE#PBF FAQ
1.How can I place an order for LT3480EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3480EMSE#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT3480EMSE#PBF reliable?
The price and inventory of LT3480EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3480EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT3480EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3480EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3480EMSE#PBF?
LT3480EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3480EMSE#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT3480EMSE#PBF?
For technical support, including LT3480EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3480EMSE#PBF requirements.
6.How does Aetrix verify that LT3480EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT3480EMSE#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT3480EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT3480EMSE#PBF?
All LT3480EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3480EMSE#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT3480EMSE#PBF part is unused and in its original packaging.
Return procedure for LT3480EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3480EMSE#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
