LT8364EMSE - 60V 4A Boost/SEPIC/Inverting Converter | Analog Devices
MPN: LT8364EMSE ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.21 | $6.21 |
| 10 | $5.49 | $54.90 |
| 100 | $4.82 | $482.00 |
| 500 | $4.15 | $2,075.00 |
| 1,000 | $3.62 | $3,620.00 |
LT8364EMSE Overview
A boost converter is a switching DC/DC topology that produces an output voltage higher than the input. A SEPIC (Single-Ended Primary Inductor Converter) topology produces a non-inverted output that can be above, below, or equal to the input. An inverting (buck-boost) converter produces an output of opposite polarity to the input. The LT8364 family belongs to the broader category of switching regulators -> DC-DC converters -> voltage regulators -> power management ICs -> semiconductors, integrating the power switch and control loop on-chip to simplify design.
Key features include programmable 9uA Burst Mode quiescent current for battery-powered applications, 15mV typical output ripple in Burst Mode operation, an internal 2MHz oscillator (programmable 200kHz to 2MHz via RT pin), and an EN/UVLO pin that serves both as enable and accurate undervoltage lockout threshold. The exposed pad provides low thermal resistance (theta_JE ~ 9C/W on the demo board layout) by soldering to a continuous copper ground plane, enabling reliable operation at high switch currents.
Internally, the LT8364 uses a constant-frequency peak current-mode control architecture with a precision reference and internal loop compensation. The single FB pin with its reference set above and below ground enables both positive (boost/SEPIC) and negative (inverting) output voltages from the same silicon, eliminating topology-specific feedback networks. The 60V switch rating supports harsh industrial and automotive input buses, including load-dump and cold-crank transients.
Typical applications include industrial 24V/28V bus boost converters to 36V or 48V, automotive ECU supply rails (SEPIC for pre-regulator or inverting for sensor bias), battery-powered portable instruments needing ultra-low 9uA quiescent current, and isolated supply front-ends using a 1:1 transformer in SEPIC topology. The wide VIN range also supports solar MPPT and PoE auxiliary rails.
When designing with the LT8364EMSE, prioritize thermal management: the exposed pad MUST be soldered to a continuous copper ground plane under the device, and power-ground components should be tied to the copper exiting near the EN/UVLO and SW pins. Inductor selection (datasheet recommends Coilcraft or equivalent with low DCR) and input/output capacitor ESR directly affect efficiency and ripple.
This page synthesizes ADI manufacturer data, real-time distributor pricing, drop-in alternative parts from the LT8364 family, and practical design notes not consolidated on the LT8364 datasheet.
Drop-in alternatives for LT8364EMSE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LT8364EMSE (same form factor and footprint) — differing in MSL Level, Package, Quiescent Current (Burst Mode), RoHS Status, Switch Voltage Rating.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LT8364IMSE#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT8364EMSE#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT8364HMSE#PBF
✅ Drop-In✓ In Stock
$3.61 / Unit
View Datasheet →LT8362EMSE#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT3958EMSE#PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT3758EMSE#PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT8364EMSE Maximum Ratings & Electrical Characteristics
| Topology | Boost, SEPIC, or Inverting (selectable via single FB pin) |
| Input Voltage Range | 2.8 V to 60 V |
| Switch Voltage Rating | 60 V maximum |
| Switch Current Rating | 4 A peak |
| Output Voltage Range | 1.6 V to 60 V (boost/SEPIC); negative in inverting |
| Quiescent Current (Burst Mode) | 9 uA typical |
| Output Ripple (Burst Mode) | 15 mV typical |
| Internal Oscillator Frequency | 2 MHz typical (RT programmable 200 kHz to 2 MHz) |
| Operating Junction Temperature | -40 C to +125 C (E grade) / 0 C to +125 C (specified) |
| Package | 16-pin MSOP (12-lead) with Exposed Pad (MSE), 3.00 mm body width |
| Mounting Type | Surface Mount |
| EN/UVLO Pin | Yes (combined enable + accurate undervoltage lockout) |
| Control Architecture | Constant-frequency peak current mode |
| MSL Level | 1 (per JEDEC J-STD-020, unlimited floor life) |
| RoHS Status | Compliant |
LT8364EMSE Pin Configuration
| Pin 1 | SW — Switch node - connected to internal power switch drain |
| Pin 2 | SW — Switch node (continued, dual bond pad) |
| Pin 3 | VIN — Input supply voltage (2.8V to 60V) |
| Pin 4 | EN/UVLO — Enable / accurate undervoltage lockout threshold |
| Pin 5 | RT — Timing resistor to program oscillator frequency (200 kHz to 2 MHz) |
| Pin 6 | SS — Soft-start capacitor pin |
| Pin 7 | FB — Single feedback pin (topology-selecting via reference) |
| Pin 8 | AGND — Analog ground |
| Pin 9 | BIAS — Internal bias decoupling pin |
| Pin 10 | BST — Bootstrap capacitor for internal gate driver |
| Pin 11 | PGND — Power ground |
| Pin 12 | PGND — Power ground (continued) |
| Pin 13 | NC — Not connected (no internal bond) |
| Pin 14 | NC — Not connected (no internal bond) |
| Pin 15 | NC — Not connected (no internal bond) |
| Pin 16 | NC — Not connected (no internal bond) |
Typical Applications
LT8364EMSE is suitable for 6 applications: Industrial 24V/28V Bus Boost to 48V, Automotive ECU Power and Sensor Bias, Battery-Powered Portable Instruments, Isolated Industrial Sensor Supply, Solar MPPT and Energy Harvesting, PoE Auxiliary and Telecom Bias Rails.
Industrial 24V/28V Bus Boost to 48V
The LT8364EMSE's 60V/4A internal switch and 2.8V-60V VIN range are purpose-built for industrial 24V or 28V bus boost converters delivering 48V at up to 1-2A. With 9uA Burst Mode quiescent current and 15mV typical ripple, the part maintains >90% efficiency at light loads while keeping noise below the threshold for downstream analog signal chains. Placed after a bulk input capacitor with a coupled-inductor SEPIC or discrete boost topology, it eliminates the need for an external MOSFET and gate driver. Designers should follow the datasheet's exposed-pad copper-plane layout to keep theta_JA low; at 7W dissipation the junction-to-ambient thermal rise is acceptable on a 1-square-inch copper pour.
Recommended
Automotive ECU Power and Sensor Bias
Automotive ECUs require post-load-dump-tolerant DC/DC conversion with low quiescent current for always-on subsystems. The LT8364EMSE handles cold-crank drops to 2.8V and load-dump surges up to 60V, while its EN/UVLO pin enables programmable undervoltage lockout to disable switching during unsafe input conditions. In SEPIC topology it can produce isolated 5V or 15V sensor bias rails; in inverting topology it can generate negative bias for op-amps or gate drivers. The 9uA Burst Mode keeps standby current negligible for key-off quiescent requirements per OEM specifications.
Recommended
Battery-Powered Portable Instruments
Handheld test equipment, wireless sensor nodes, and field-data loggers benefit from the LT8364EMSE's 9uA Burst Mode quiescent current, which extends battery life by orders of magnitude versus conventional PWM converters that draw mA. The 2.8V minimum input supports single-cell Li-ion down to cutoff, and 4A peak switch capability handles transient loads (radio TX bursts, motor starts) without entering dropout. With a coupled-inductor SEPIC the part can boost 3.7V Li-ion to 12V or 15V to drive op-amps, LCD bias, or sensor excitation directly from a single Li-ion cell.
Recommended
Isolated Industrial Sensor Supply
Industrial 4-20mA loop-powered transmitters and isolated analog front-ends require isolated DC rails on a single PCB. The LT8364EMSE supports isolated supply front-ends via a 1:1 transformer in SEPIC topology, where the secondary winding produces a floating output referenced to a chassis or safety ground. The 60V switch rating supports the high primary-side voltages seen during transformer reset, while 9uA Burst Mode keeps the isolated supply's standby consumption low. The exposed pad package simplifies thermal management on the often-compact DIN-rail or field-mount PCBs.
Recommended
Solar MPPT and Energy Harvesting
Solar MPPT (Maximum Power Point Tracking) converters and energy-harvesting front-ends require wide VIN tolerance (the LT8364EMSE handles 2.8V-60V) and low quiescent current to maximize harvested energy. In boost or SEPIC topology, the LT8364EMSE can extract maximum power from 6V-36V solar panels under varying irradiance and load. The EN/UVLO pin prevents battery back-feeding at night, and 9uA Burst Mode keeps conversion efficiency above 90% even at milliwatt-level power levels. The exposed pad provides the thermal headroom needed for hot-panel operation in direct sunlight.
Recommended
PoE Auxiliary and Telecom Bias Rails
Power-over-Ethernet (PoE) powered devices and telecom line-interface cards often need auxiliary rails beyond the main PD converter. The LT8364EMSE can produce -48V, -12V, or other negative telecom rails from a positive intermediate bus using inverting topology, or boost/SEPIC to higher positive voltages. Its 60V switch rating handles telecom line transients (per ITU-T K.20/K.21) with margin, while the 9uA Burst Mode quiescent current is negligible compared to the PD's overall budget. The MSOP-16 footprint simplifies integration alongside the main PD controller on the same PCB.
Recommended
Recommended Products Summary
Engineering reference data for LT8364EMSE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LT8364IMSE#PBF | LT8364EMSE#PBF | LT8364HMSE#PBF | LT8362EMSE#PBF |
|---|---|---|---|---|---|
| Package | MSOP-16 (MSE) Exposed Pad | MSOP-16 (MSE) Exposed Pad - same | MSOP-16 (MSE) Exposed Pad - same | MSOP-16 (MSE) Exposed Pad - same | MSOP-16 (MSE) Exposed Pad - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Switch Current | 4 A peak | 4 A peak | 4 A peak | 4 A peak | ~2 A peak |
| Switch Voltage Rating | 60 V | 60 V | 60 V | 60 V | 60 V |
| Input Voltage Range | 2.8 V to 60 V | 2.8 V to 60 V | 2.8 V to 60 V | 2.8 V to 60 V | 3 V to 60 V |
| Quiescent Current (Burst Mode) | 9 uA | 9 uA | 9 uA | 9 uA | 9 uA |
| Operating Temperature Range | -40 C to +125 C (E grade) | -40 C to +125 C (I grade) | -40 C to +125 C (E grade) | -40 C to +150 C (H grade, automotive) | -40 C to +125 C |
| Topologies Supported | Boost, SEPIC, Inverting | Boost, SEPIC, Inverting | Boost, SEPIC, Inverting | Boost, SEPIC, Inverting | Boost, SEPIC, Inverting |
Key Differentiators
- Single FB pin supports boost, SEPIC, and inverting topologies from the same silicon (vs LT8362EMSE#PBF)
- 9uA Burst Mode quiescent current enables multi-year battery life (vs LT3758EMSE#PBF)
- 60V switch rating covers automotive load-dump without external TVS (vs LT3958EMSE#PBF)
Design Notes
Estimated: at VIN=24V, VOUT=48V, IOUT=1A in boost topology, the LT8364EMSE dissipates approximately 1W (Pdiss = (VIN-VOUT)/VOUT * POUT + switching loss). The MSOP-16 exposed pad MUST be soldered to a continuous copper ground plane to achieve the datasheet's thermal resistance; a 1-square-inch copper pour on a 2-layer board yields theta_JA ~ 35C/W, giving a 35C junction temperature rise above ambient. For higher-power applications, expand the copper area or use a 4-layer board with internal ground planes; ADI's demo board layout (DC2357A) is the recommended reference. Power-ground components should connect to the copper exiting near the EN/UVLO and SW pins to minimize high-current loop inductance.
Place input capacitor (datasheet recommends 4.7uF X7R minimum) as close as possible to the VIN and PGND pins to minimize the high-frequency switching loop. The BST capacitor (typically 0.1uF) must be placed adjacent to the BST and SW pins; its voltage rating should exceed the maximum SW node voltage including ringing. Keep the FB trace short and away from the SW node to avoid noise injection; if routing forces proximity, use a ground guard ring. The exposed pad should be tied to a single continuous ground pour without thermal relief cuts in the high-current paths (SW return, PGND, VIN return).
Do not operate without the BST capacitor - the internal high-side gate driver requires this charge pump to fully enhance the internal N-channel MOSFET, otherwise Rds_on increases, conduction loss rises, and the switch may self-destruct. Do not use a ceramic output capacitor with insufficient voltage derating; X7R/X5R derate 30-50% at full VIN+ripple. Do not float the SS pin; a 0.1uF cap here is required for soft-start and to limit inrush current. The RT pin resistor sets the oscillator frequency; choose a 1% tolerance part for accurate frequency and predictable EMI spectrum.
In SEPIC topology, the coupling capacitor (CSEPIC) must be a low-ESR ceramic with voltage rating exceeding VIN + VOUT; place it symmetrically between the two windings. For inverting topology, the maximum SW voltage equals VIN + |VOUT| - confirm the selected part's switch voltage rating (60V for LT8364) accommodates this. Minimize the loop area of CSEPIC, the two inductors, and the SW node; ADI's typical application circuits show two inductors (or a single coupled inductor) and a coupling capacitor in a star configuration. Keep the feedback divider close to the FB pin with the ground node tied to AGND, not PGND, to avoid ground bounce coupling.
Compliance Information
RoHS compliant per ADI product page. The LT8364EMSE is not AEC-Q100 qualified - choose LT8364HMSE#PBF (H grade) for automotive. Lead-free (Pb-free) per ordering code suffix #PBF.
