My Inquiry
My Account
Analog Devices Inc. LT3995IMSE#PBF
- Part No.:
- LT3995IMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3995IMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 3A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,296
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3995IMSE#PBF from Analog Devices is a monolithic 60V input, 3A synchronous step-down switching regulator with current-mode control, 2.7µA no-load quiescent current, adjustable 200kHz–2MHz switching frequency, and 500mV dropout voltage-designed for automotive cold-crank battery regulation in 12V/24V systems.
For engineers reviewing the LT3995IMSE#PBF datasheet, LT3995IMSE#PBF pinout, LT3995IMSE#PBF application, or LT3995IMSE#PBF equivalent, key selection criteria include ultralow IQ performance under light load, Burst Mode® ripple control (<15mVP-P), AEC-Q100 qualification, programmable UVLO via EN pin (1.02V threshold), and thermal derating support up to 125°C junction temperature.
Technical Context
The LT3995IMSE#PBF employs an internally compensated current-mode architecture with fixed-frequency PWM and automatic transition to low-ripple Burst Mode® at light loads. Its bipolar NPN power switch features 85mΩ on-resistance and is driven by a charge-pump boosted gate voltage from the BOOST pin.
It integrates a 1.197V precision feedback reference, soft-start via SS pin (1.8µA internal pull-up), open-drain power-good flag (PG) triggered at 91.6% of VOUT, and current-limit foldback that reduces peak switch current from 6.3A to 3.1A during overload-overridden during startup by SS voltage <2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.3V to 60V - supports wide automotive battery transients including cold-crank down to 4.3V. |
| Max Output Current | 3A continuous - limited by thermal design and 85mΩ switch RDS(on) with foldback to 3.1A under short-circuit. |
| No-Load Quiescent Current | 2.7µA at 12VIN/3.3VOUT - enables >10-year battery life in always-on automotive modules. |
| Switching Frequency | 200kHz to 2MHz - set by RT resistor; synchronizable externally from 250kHz to 2MHz. |
| Feedback Reference Voltage | 1.197V ±1.2% - enables accurate output programming with high-impedance resistor dividers (MΩ range). |
| Dropout Voltage | 500mV - enforced minimum (VIN – VOUT) ensures boost capacitor remains charged and switch stays saturated during dropout. |
| Power-Good Threshold | 91.6% of regulated VOUT - open-drain PG pin asserts high when FB reaches this level; valid above VIN = 2V. |
| Operating Junction Temp | –40°C to 125°C - qualified per AEC-Q100 Grade I; exposed-pad MSOP enables θJA = 40°C/W. |
Pinout & Package
LT3995IMSE#PBF is housed in a thermally enhanced 16-lead plastic MSOP package with exposed pad (Pin 17 = GND), requiring PCB soldering of the pad for optimal thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (1) | Feedback input | Regulated to 1.197V; connects to resistor divider tap; phase-lead capacitor (10pF) recommended between FB and VOUT. |
| SS (2) | Soft-start control | 1.8µA internal pull-up charges external capacitor; actively discharged during shutdown/UVLO/thermal fault. |
| OUT (3) | Boost diode anode & dropout sense | Connects to output when VOUT < 16V; supplies bias to internal regulator if >3.2V; inputs dropout comparator. |
| BOOST (4) | Charge-pump drive | Provides >VIN voltage to saturate internal bipolar NPN switch; requires external capacitor to SW. |
| SW (5,6,7) | Switch node | Drives external inductor, catch diode, and BOOST capacitor; three pins paralleled for low-inductance, high-current routing. |
| NC (8,9) | No connect | Not bonded internally; must remain unconnected on PCB. |
| VIN (10,11,12) | Main power input | Supplies internal circuitry and switch; local ceramic bypassing required; three pins reduce IR drop and ESR. |
| EN (13) | Enable / UVLO input | Hysteretic threshold: 1.02V (falling), 1.08V (rising); accurate only when VIN ≥4.3V; ties directly to microcontroller GPIO. |
| RT (14) | Frequency setting | Resistor to GND sets fSW from 200kHz–2MHz; e.g., 182kΩ = 300kHz (see datasheet Table 1). |
| PG (15) | Power-good flag | Open-drain output; pulled low during startup/fault/shutdown; high-Z when VFB ≥91.6% × VREF. |
| SYNC (16) | External clock input | Ground for Burst Mode®; drive with CMOS clock (250kHz–2MHz) for synchronization; floating prohibited. |
| GND (17) | Power ground | Exposed thermal pad; must be soldered to large PCB copper area for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 2.7µA IQ enables >10-year standby in automotive telematics and always-on ECUs without battery drain. |
| Low-ripple Burst Mode® | Maintains <15mVP-P output ripple at light loads using controlled pulse-bursting-critical for noise-sensitive RF and sensor circuits. |
| Programmable undervoltage lockout | Accurate 1.02V EN threshold allows custom battery brown-out detection without external comparators. |
| Thermal-enhanced MSOP-16EP | Exposed pad + 40°C/W θJA supports 3A operation on 2-layer boards without heatsinks in industrial ambient (≤85°C). |
| AEC-Q100 Grade I qualification | Validated for –40°C to +125°C operation with HTOL, TC, ESD, and board-level reliability testing-suitable for engine bay and ADAS modules. |
| Current limit foldback with SS override | Reduces switch current from 6.3A to 3.1A during overload to limit TJ; disabled during startup (SS <2V) to ensure reliable turn-on. |
Applications
| Automotive Battery Regulation | Portable Medical Devices |
|---|---|
|
Use Scenario: Powering infotainment head units and ADAS cameras from 12V vehicle battery with cold-crank survival (down to 4.3V). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3V/5V with 500mV dropout and 2.7µA IQ to extend parking-mode runtime. Use Value: Eliminates need for external LDO post-regulation; maintains system wakefulness during 14V→4.3V battery sag without reset. |
Use Scenario: Supplying ultra-low-power glucose monitors and portable ECG devices from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: High-efficiency step-down converter enabling multi-year battery life via Burst Mode® and MΩ feedback networks. Use Value: Reduces average supply current to sub-µA levels at µA loads-directly extending clinical device operational lifetime. |
| Industrial IoT Sensors | Railway Control Modules |
|
Use Scenario: Powering wireless vibration sensors mounted on motors or pipelines operating from 24V DC industrial rails. IC Role / Device Role / Timing Role: Wide-input buck regulator providing 3.3V to MCU, BLE radio, and MEMS accelerometer with robust EMI immunity. Use Value: Withstands 60V transients and delivers 3A peak for radio transmission bursts while maintaining <15mV ripple during sensing. |
Use Scenario: Regulating 36V/72V railway auxiliary power to 5V for onboard PLCs and safety controllers in rolling stock. IC Role / Device Role / Timing Role: AEC-Q100-qualified buck controller meeting EN 50155 shock/vibe and temperature requirements. Use Value: Ensures uninterrupted operation across –40°C to +125°C junction range and survives 100V line surges per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8614EMSE#PBF | 42V max input, 4A output, 2.5µA IQ, Silent Switcher® architecture; no BOOST pin (integrated MOSFETs). | Better EMI performance; lacks 60V rating and external BOOST flexibility for ultra-low dropout. | Select when EMI is critical and input ≤42V; not suitable for 48V+ automotive or cold-crank below 4.3V. |
| TPS54360BQPWPRQ1 | 60V input, 3.5A, 14µA IQ, integrated FETs; no Burst Mode®, uses Eco-mode™ with higher light-load ripple. | Higher IQ increases battery drain; no programmable UVLO; lower thermal performance (MSOP-8EP). | Choose for cost-sensitive automotive apps where 14µA IQ is acceptable and 15mV ripple tolerance is >±5mV. |
Compared with LT3995IMSE#PBF, LT8614EMSE#PBF offers superior EMI suppression but sacrifices 60V capability and BOOST-driven dropout control, while TPS54360BQPWPRQ1 provides pin-compatible packaging but doubles quiescent current and lacks Burst Mode®'s sub-15mV ripple guarantee.
Availability
LT3995IMSE#PBF is available at Aetrix Electronics and suitable for automotive battery regulation, portable medical instrumentation, industrial IoT sensor nodes, and railway control modules requiring stable component supply with AEC-Q100 compliance and long-term lifecycle assurance.
Supply support for LT3995IMSE#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LT3995 belongs to Linear's high-voltage monolithic buck regulator family, engineered specifically for automotive and industrial applications demanding ultralow IQ, wide VIN range, and robust thermal performance under sustained load.
FAQ
What is the guaranteed operating temperature range for LT3995IMSE#PBF?
The LT3995IMSE#PBF is specified and guaranteed over –40°C to +125°C junction temperature, meeting AEC-Q100 Grade I requirements. This rating is validated through HTOL, temperature cycling, and board-level reliability testing-not just design simulation-and applies to all electrical parameters in the datasheet's "l"-marked rows.
How does LT3995IMSE#PBF achieve 2.7µA quiescent current?
The LT3995IMSE#PBF achieves 2.7µA IQ through a combination of low-leakage bipolar process design, adaptive circuit disabling in Burst Mode®, and optimized biasing-measured at 12VIN/3.3VOUT with SYNC grounded and no load. This value excludes feedback resistor current and catch diode leakage, which must be minimized separately for full benefit.
Can LT3995IMSE#PBF operate with input voltage below 4.3V?
No-4.3V is the absolute minimum input voltage for normal regulation per datasheet Absolute Maximum Ratings and Electrical Characteristics. Below this, internal UVLO forces shutdown. The 500mV dropout behavior only applies when VIN drops *toward* but remains *above* the programmed VOUT, not below 4.3V.
What is the purpose of the BOOST pin on LT3995IMSE#PBF?
The BOOST pin on LT3995IMSE#PBF supplies a charge-pump–generated voltage (>VIN) to fully saturate the internal bipolar NPN power switch, enabling low 85mΩ on-resistance and stable 500mV dropout performance-even during automotive cold-crank events where VIN sags near VOUT.
Is LT3995IMSE#PBF pin-compatible with other LT3995 variants like LT3995EMSE#PBF?
Yes-LT3995IMSE#PBF shares identical pinout, package (16-lead MSOP-EP), and electrical interface with LT3995EMSE#PBF and LT3995HMSE#PBF. The only differences are temperature grade (I = –40°C to 125°C), internal test limits, and qualification level (AEC-Q100 applies only to I-grade automotive-marked parts).
LT3995IMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (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):
- 4.3V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.197V
- Voltage - Output (Max):
- 55.8V
- Current - Output:
- 3A
- Frequency - Switching:
- 200kHz ~ 2.25MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT3995IMSE#PBF FAQ
1.How can I place an order for LT3995IMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3995IMSE#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 LT3995IMSE#PBF reliable?
The price and inventory of LT3995IMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3995IMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT3995IMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3995IMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3995IMSE#PBF?
LT3995IMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3995IMSE#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 LT3995IMSE#PBF?
For technical support, including LT3995IMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3995IMSE#PBF requirements.
6.How does Aetrix verify that LT3995IMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT3995IMSE#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 LT3995IMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT3995IMSE#PBF?
All LT3995IMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3995IMSE#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 LT3995IMSE#PBF part is unused and in its original packaging.
Return procedure for LT3995IMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3995IMSE#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…
