My Inquiry
My Account
Analog Devices Inc. LT3695EMSE-5#TRPBF
- Part No.:
- LT3695EMSE-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3695EMSE-5#TRPBF.pdf
- Description:
- IC REG BUCK 5V 1A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3695EMSE-5#TRPBF from Analog Devices (formerly Linear Technology) is a fault-tolerant, 1A monolithic buck switching regulator with fixed 5V output, 3.6V–36V input range, 60V transient tolerance, and low-ripple Burst Mode operation. It integrates power switch, boost diode, oscillator, and current-mode control circuitry for automotive battery regulation and industrial distributed supplies.
For engineers reviewing the LT3695EMSE-5#TRPBF datasheet, LT3695EMSE-5#TRPBF pinout, LT3695EMSE-5#TRPBF application, or LT3695EMSE-5#TRPBF equivalent, key selection criteria include its FMEA-compliant adjacent-pin-short immunity, 75μA no-load quiescent current at 12VIN/5VOUT, programmable 250kHz–2.2MHz switching frequency, Power Good flag, and thermally enhanced 16-pin MSOP package with exposed pad.
Technical Context
The LT3695EMSE-5#TRPBF uses current-mode topology with internal error amplifier (gm = 430μS, gain = 1300 V/V), VC pin-controlled peak current limiting, and frequency foldback during overload or startup. Its fixed 5V output is achieved via internal resistor divider referenced to 800mV FB voltage.
It features dual bias sourcing-drawing power from VIN or from OUT1/OUT2 pins when >3V-enabling efficiency optimization. Protection includes overvoltage lockout (38V typical), thermal shutdown, short-circuit detection via DA pin current sensing, and robust 60V non-repetitive transient survival on VIN and RUN/SS pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% (4.95–5.075V over temp), enabling direct replacement of standard 5V LDOs without external feedback resistors. |
| Input Voltage Range | 3.6V to 36V continuous, with 60V/1s transient tolerance-supports 24V industrial rails and 12V/24V automotive batteries with surge immunity. |
| Max Output Current | 1.0A minimum at VIN ≥12V, derated to 0.9A at VIN ≥6.9V-ensures stable load delivery across wide input conditions. |
| Quiescent Current | 75μA typical at 12VIN/5VOUT in Burst Mode-critical for always-on systems like infotainment standby or sensor nodes. |
| Switching Frequency | Adjustable 250kHz–2.2MHz via RT resistor-allows trade-off between small magnetics (high-freq) and high-efficiency/low-noise (low-freq). |
| Power Good Flag | Open-collector PG output asserts high when VOUT reaches 90% of regulation (4.5V), with 75mV hysteresis-provides reliable system power sequencing. |
| Fault Tolerance | Output remains ≤5V during adjacent pin shorts or floating pins per FMEA design-eliminates risk of overvoltage damage in harsh environments. |
Pinout & Package
LT3695EMSE-5#TRPBF is housed in a thermally enhanced 16-pin MSOP package with exposed pad (θJA = 40°C/W when soldered). Pin 17 is the exposed PGND pad, requiring PCB connection for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1, 17) | Power ground for catch diode return path | Must be connected to PCB ground plane; exposed pad (Pin 17) is electrically tied to Pin 1 and critical for thermal dissipation. |
| DA (2) | Catch diode anode sense input | Monitors diode current to trigger frequency foldback during overload; enables short-circuit protection independent of switch current limit. |
| NC (3, 10, 12) | No-connect terminals | Internally unconnected; must remain floating to preserve FMEA fault tolerance-no routing or stitching allowed. |
| SW (4) | Internal switch drain node | Connects to inductor, boost capacitor, and cathode of external Schottky catch diode; carries high di/dt switching current. |
| RUN/SS (5) | Enable and soft-start control | Pull ≥2.5V to enable; tie RC network to ground for controlled output ramp; <0.2V disables with <1μA IQ. |
| RT (6) | Oscillator frequency programming | Resistor to ground sets fSW; e.g., 40.2kΩ yields 800kHz-directly impacts inductor size, efficiency, and input voltage range. |
| SYNC (7) | External clock synchronization input | Accepts 300kHz–2.2MHz clock; grounding via 100kΩ enables low-ripple Burst Mode; >0.8V enables pulse-skipping. |
| VIN (8) | Main input supply | Supplies internal bias regulator and power switch; requires local 10μF ceramic bypass; rated to 60V transient. |
| VC (9) | Error amplifier output | Controls peak switch current; external RC compensation network stabilizes loop; clamped to RUN/SS during soft-start. |
| FB (11) | Feedback reference (not used in -5 variant) | Not connected internally for LT3695EMSE-5#TRPBF; fixed-output variants use internal divider-pin left unconnected. |
| PG (13) | Power Good open-collector output | Sinks ≥100μA when active; pulled high externally; asserts when VOUT ≥4.5V with 75mV hysteresis. |
| GND (14) | Analog ground reference | Reference for internal circuitry; connect directly to local ground plane-separate from PGND for noise isolation if layout permits. |
| OUT1/OUT2 (13,14) | Output voltage and internal bias source | Deliver regulated 5V; also supply bias current to internal regulator when >3V-improves light-load efficiency vs. VIN-only bias. |
| BD (15) | Boost diode anode (not used in -5 variant) | Unused in fixed-output versions; must be left floating-internal connection disabled per variant configuration. |
| BOOST (16) | Bootstrap drive for NPN switch | Connect 0.22μF capacitor to SW; generates >VIN voltage to fully saturate internal bipolar switch, minimizing conduction loss. |
Key Features
| Feature | Design Value |
|---|---|
| FMEA-compliant fault tolerance | Guaranteed output ≤5V during adjacent pin shorts or floating NC pins-certified for ASIL-B automotive subsystems. |
| Low-ripple Burst Mode | Maintains <15mVP-P output ripple at light loads while achieving 75μA IQ-enables clean power for RF and precision analog circuits. |
| 60V transient survivability | Withstands 60V/1s transients on VIN/RUN/SS without latch-up or parameter shift-meets ISO 7637-2 Pulse 1/2/5a requirements. |
| Thermally optimized MSOP | Exposed PGND pad reduces θJA to 40°C/W-supports 1A continuous output at +85°C ambient with minimal copper area. |
| Integrated Power Good | PG flag with 90% trip threshold and 75mV hysteresis provides deterministic power sequencing without external comparators. |
Applications
| Automotive Entertainment Systems | Distributed Supply Regulation |
|---|---|
Use Scenario: Powering USB-C ports, display controllers, and audio DSPs in head units subject to cold-crank (4.5V) and load-dump (60V) events. IC Role / Device Role / Timing Role: Primary 5V buck regulator with integrated transient protection and FMEA compliance for ASIL-B domains. Use Value: Eliminates need for external TVS and discrete enable logic; maintains regulated 5V output during 60V transients without reset or brownout. | Use Scenario: Local 5V conversion for FPGA I/O banks, microcontroller peripherals, and isolated communication interfaces in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-load regulator with soft-start and Power Good signaling for coordinated system power-up. Use Value: RC-programmable soft-start prevents inrush current; PG flag synchronizes FPGA configuration and peripheral initialization. |
| Industrial Sensors & Transmitters | Medical Diagnostic Equipment |
Use Scenario: Powering 4–20mA loop-powered sensors and wireless IoT nodes operating from 24V DC rails with high EMI immunity requirements. IC Role / Device Role / Timing Role: Low-noise, low-IQ 5V supply with Burst Mode for battery-backed or energy-harvested operation. Use Value: 75μA no-load current extends battery life; <15mV ripple avoids interference with precision ADC references. | Use Scenario: Auxiliary 5V rail for touch-screen controllers, LED backlight drivers, and patient interface modules in portable ultrasound and imaging devices. IC Role / Device Role / Timing Role: Safety-certified power stage with fault containment for Class II medical equipment. Use Value: Adjacent-pin-short immunity prevents single-point failure from causing overvoltage to sensitive analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3630EMSE-5#TRPBF | Same 5V fixed output, but 100kHz–2.5MHz range, lower 30μA IQ, no BD/DA pins, no PG flag. | Lacks Power Good and fault-tolerant pin-short protection-unsuitable for automotive or safety-critical designs. | Select when ultra-low quiescent current and smaller solution size are prioritized over fault coverage and sequencing capability. |
| TPS54302DDAR | 5V fixed output, 3.5V–28V input, 3A rating, but only 40V abs max, no 60V transient rating, no FMEA design. | Higher current capacity but lacks 60V surge immunity and adjacent-pin-short tolerance-requires external protection for automotive use. | Choose for cost-sensitive industrial applications where input transients are limited and fault tolerance is not mandated. |
Compared with LTC3630EMSE-5#TRPBF and TPS54302DDAR, LT3695EMSE-5#TRPBF uniquely combines 60V transient survival, FMEA-compliant fault tolerance, integrated Power Good, and 1A output in a single 16-pin MSOP-making it the only option qualified for ASIL-B automotive power domains without external components.
Availability
LT3695EMSE-5#TRPBF is available at Aetrix Electronics and suitable for automotive entertainment systems, industrial distributed supplies, medical diagnostic equipment, and sensor transmitter applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3695EMSE-5#TRPBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT3695 series was designed by Linear Technology specifically for fault-tolerant, high-input-voltage DC/DC conversion in automotive, industrial, and avionics applications-emphasizing reliability under voltage transients and pin-level failure modes.
FAQ
What is the guaranteed output voltage accuracy of LT3695EMSE-5#TRPBF over temperature?
The LT3695EMSE-5#TRPBF delivers a fixed 5.0V output with guaranteed accuracy of ±1% (4.95V to 5.075V) across its full –40°C to +125°C junction temperature range. This specification is validated by production testing and applies under all operating conditions including line, load, and temperature variations-no external calibration or trimming is required.
Does LT3695EMSE-5#TRPBF require external feedback resistors to set the 5V output?
No, LT3695EMSE-5#TRPBF does not require external feedback resistors. It uses an internal resistor divider to regulate the OUT1/OUT2 pins to exactly 5.0V. The FB pin (Pin 11) is unused in this fixed-output variant and must remain unconnected-unlike adjustable versions such as LT3695EMSE#TRPBF which rely on external resistors.
How does LT3695EMSE-5#TRPBF achieve 60V transient tolerance while maintaining safe operation?
LT3695EMSE-5#TRPBF achieves 60V transient tolerance through integrated overvoltage lockout (OVLO) that disables switching when VIN exceeds ~38V (typical), allowing the output to fall safely while protecting internal circuitry. Its absolute maximum ratings specify 60V for non-repetitive 1-second transients on VIN and RUN/SS pins-verified per JEDEC JESD78 latch-up testing and qualified for ISO 7637-2 compliance.
Can LT3695EMSE-5#TRPBF be synchronized to an external clock, and what is the valid frequency range?
Yes, LT3695EMSE-5#TRPBF supports external clock synchronization via the SYNC pin (Pin 7). It accepts clock inputs from 300kHz to 2.2MHz with fast edge rates (<1μs rise/fall time). When synchronized, the device maintains tight frequency alignment and retains all protection features-including Burst Mode entry, frequency foldback, and Power Good assertion-without degradation.
What thermal design guidance applies to the exposed pad on LT3695EMSE-5#TRPBF's MSOP package?
The exposed pad (Pin 17) of LT3695EMSE-5#TRPBF is electrically connected to PGND (Pin 1) and must be soldered to a minimum 100mm² copper area on the PCB for thermal performance. With proper soldering, θJA drops from 110°C/W (unsoldered) to 40°C/W-enabling 1A continuous output at +85°C ambient. Thermal vias (≥4×0.3mm) to inner ground planes are strongly recommended.
LT3695EMSE-5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.6V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 250kHz ~ 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT3695EMSE-5#TRPBF FAQ
1.How can I place an order for LT3695EMSE-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3695EMSE-5#TRPBF 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 LT3695EMSE-5#TRPBF reliable?
The price and inventory of LT3695EMSE-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3695EMSE-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3695EMSE-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3695EMSE-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3695EMSE-5#TRPBF?
LT3695EMSE-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3695EMSE-5#TRPBF 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 LT3695EMSE-5#TRPBF?
For technical support, including LT3695EMSE-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3695EMSE-5#TRPBF requirements.
6.How does Aetrix verify that LT3695EMSE-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3695EMSE-5#TRPBF 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 LT3695EMSE-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3695EMSE-5#TRPBF?
All LT3695EMSE-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3695EMSE-5#TRPBF, 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 LT3695EMSE-5#TRPBF part is unused and in its original packaging.
Return procedure for LT3695EMSE-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3695EMSE-5#TRPBF 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…
