My Inquiry
My Account
Analog Devices Inc. LTC3637EMSE#TRPBF
- Part No.:
- LTC3637EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3637EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,246
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3637EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, wide-input 76V step-down DC/DC regulator with integrated 350mΩ P-channel MOSFET, programmable 0.1–1A output current, 12µA no-load quiescent current, and 0.8V ±1% feedback reference-designed for industrial control supplies and battery-operated systems requiring robust input voltage handling and low standby power.
For engineers reviewing the LTC3637EMSE#TRPBF datasheet, LTC3637EMSE#TRPBF pinout, LTC3637EMSE#TRPBF application, or LTC3637EMSE#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping to MSE16, real-world efficiency vs. load data, and two rigorously cross-checked alternative parts for fixed-output and adjustable configurations.
Technical Context
The LTC3637EMSE#TRPBF implements Burst Mode® operation with hysteretic peak-current control, enabling ultra-low 12µA sleep-mode supply current while maintaining regulation across 4V–76V input. Its internal P-channel high-side switch supports 100% duty cycle dropout operation and eliminates external compensation components.
Output voltage is selectable via VPRG1/VPRG2 pins for 1.8V/3.3V/5V fixed outputs or fully adjustable (0.8V–VIN) using an external resistor divider. Peak inductor current is precisely programmed via ISET pin (0.1A–1A typical average output), directly influencing ripple, component size, and light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports direct regulation from 24V/48V industrial rails, automotive batteries, and PoE+ injectors without pre-regulation. |
| Max Output Current | 1A average - derived from 2.4A typical peak current limit; enables compact 12V@1A or 5V@1A designs with minimal thermal derating in MSE16 package. |
| Quiescent Current | 12µA in Burst Mode - sustains regulation at microamp-level loads (e.g., RTC backup, sensor sleep states) without battery drain. |
| Feedback Reference | 0.8V ±1% - enables precise output setting down to 0.8V; tolerance directly impacts output accuracy in adjustable configurations. |
| Switch RDS(on) | 350mΩ - limits conduction loss at 1A; combined with P-channel architecture, enables 100% duty cycle for low-VIN dropout. |
| Soft-Start Time | 0.8ms internal or user-programmable - prevents inrush current on power-up; capacitor on SS pin scales ramp time linearly (1ms per 16.5nF). |
| Overvoltage Lockout | Programmable via OVLO pin - disables switching when input exceeds set threshold (e.g., 60V), protecting downstream circuitry during transients. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE16), 3mm × 4.9mm × 1.0mm profile, exposed pad (Pin 17) tied to GND for thermal performance (θJA = 45°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connects to inductor and catch diode; carries pulsed high-side switch current; requires low-inductance layout. |
| VIN (3) | Main input supply | Accepts 4V–76V; bypassed with ceramic capacitor to GND for stability and EMI suppression. |
| FBO (5) | Feedback comparator output | Open-drain flag indicating regulation status; 20µA pull-up, 70Ω pull-down for fault signaling. |
| VPRG1/VPRG2 (6,7) | Output voltage selection | Configure fixed 1.8V/3.3V/5V or adjustable mode by grounding or tying to SS pin. |
| GND (8,16,17) | Ground reference & thermal path | Multiple GND pins + exposed pad must be soldered to PCB ground plane for thermal integrity. |
| VFB (9) | Feedback input | Compares divided output to 0.8V reference; connects to resistor divider (adjustable) or directly to VOUT (fixed). |
| SS (10) | Soft-start control | Capacitor-to-GND sets output ramp time; internal 0.8ms default; 5µA charging current enables precise timing. |
| ISET (11) | Peak current programming | Resistor-to-GND sets peak current (0.1A–1A avg); floating = 2.4A peak; shorted = 0.24A peak. |
| OVLO (12) | Input overvoltage lockout | Resistive divider sets shutdown threshold >1.21V; ensures safe operation during input surges. |
| RUN (14) | Enable/disable control | 1.21V threshold enables operation; <0.7V forces 3µA shutdown; supports undervoltage lockout via divider. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Delivers 12µA no-load IQ while sustaining regulation-critical for battery longevity in portable instruments and remote sensors. |
| Programmable peak current limit | Adjusts max output from 0.1A to 1A via single resistor on ISET pin-optimizes inductor/capacitor sizing and reduces BOM cost. |
| Integrated P-channel MOSFET | 350mΩ RDS(on) enables 100% duty cycle dropout and eliminates external high-side switch, simplifying layout and reducing footprint. |
| No external compensation required | Stable with standard ceramic output capacitors-removes loop compensation design effort and avoids phase-margin tuning errors. |
| Precise RUN and OVLO thresholds | 1.21V rising threshold with 110mV hysteresis enables accurate input voltage windowing for automotive and avionics applications. |
Applications
| Industrial Control Supplies | Medical Devices |
|---|---|
Use Scenario: Powering PLC I/O modules, fieldbus transceivers, and isolated sensor interfaces from unregulated 24V/48V factory rails. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 5V/3.3V to microcontrollers and analog front-ends. Use Value: 76V input rating withstands 48V rail transients; 12µA quiescent current extends uptime during brownouts. |
Use Scenario: Supplying patient monitoring equipment (ECG, pulse oximeters) operating from rechargeable Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Main system regulator providing low-noise 3.3V to ADCs, op-amps, and wireless SoCs in sleep-active cycles. Use Value: Burst Mode® maintains regulation at µA loads without wake-up latency; programmable ISET minimizes output ripple during signal acquisition. |
| Distributed Power Systems | Automotive |
Use Scenario: Local point-of-load conversion in telecom base stations or server racks where 48V or 54V backplanes feed multiple subsystems. IC Role / Device Role / Timing Role: Secondary buck converter stepping 48V down to 12V/5V for FPGA, memory, or interface ICs. Use Value: Wide 4V–76V range accommodates both nominal 48V and degraded input; MSE16 package fits dense board layouts. |
Use Scenario: Powering infotainment head units, ADAS camera modules, or body control modules from 12V vehicle battery with load dump immunity. IC Role / Device Role / Timing Role: Input-stage regulator handling cold-crank (4.5V) to load-dump (60V+) conditions before LDOs or PMICs. Use Value: Programmable OVLO disables switching above 36V to protect downstream electronics; RUN pin enables controlled startup after ignition. |
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#TRPBF | Lower 36V max input; 2A output; no programmable peak current; fixed 3.3V/5V only (no adjustable mode) | Suitable for lower-voltage industrial or consumer systems where 76V rating is unnecessary | Select when input never exceeds 36V and fixed output suffices-reduces design complexity but sacrifices flexibility. |
| LM5164QPWPRQ1 | 4.5V–65V input; 1A output; external MOSFET drive; requires compensation; AEC-Q100 qualified | Targeted for automotive under-hood applications requiring qualification and higher ambient temperature support | Choose for automotive production where AEC-Q100 compliance and extended temp range (–40°C to 150°C) are mandatory. |
Compared with LTC3637EMSE#TRPBF, LTC3631EMSE#TRPBF trades input voltage range and adjustability for simpler fixed-output implementation, while LM5164QPWPRQ1 provides automotive qualification and external FET control at the cost of added external components and compensation design effort.
Availability
LTC3637EMSE#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, medical devices, and distributed power systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3637EMSE#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 acquired Linear Technology in 2017 and maintains its high-performance power management portfolio with rigorous reliability testing and military-grade process controls.
The LTC3637EMSE#TRPBF belongs to Linear's high-voltage monolithic buck regulator product line, engineered for rugged environments including industrial automation, avionics, and battery-powered instrumentation where wide input range and ultra-low quiescent current are critical.
FAQ
What is the maximum input voltage rating for the LTC3637EMSE#TRPBF?
The LTC3637EMSE#TRPBF has an absolute maximum input voltage rating of 80V, with guaranteed operation across 4V to 76V. This allows direct connection to 48V industrial buses, 60V PoE++ sources, and automotive systems experiencing load dump transients up to 65V-provided OVLO is configured to disable switching above safe thresholds. The LTC3637EMSE#TRPBF integrates protection circuitry that sustains 80V indefinitely in shutdown mode.
How does the ISET pin program output current in the LTC3637EMSE#TRPBF?
The ISET pin on the LTC3637EMSE#TRPBF sources a 5µA (active) or 1µA (sleep) current; connecting a resistor from ISET to GND sets the peak inductor current threshold. Using RISET = 140k·IPEAK – 24k (for 0.2A ≤ IPEAK ≤ 2A), a 100kΩ resistor yields ~1A peak current → 0.5A average output. The LTC3637EMSE#TRPBF's architecture limits average output to half the peak current, so 2.4A peak (floating ISET) delivers 1A max average load.
Can the LTC3637EMSE#TRPBF operate in 100% duty cycle dropout mode?
Yes-the LTC3637EMSE#TRPBF uses an internal P-channel MOSFET high-side switch, enabling true 100% duty cycle operation when VIN approaches VOUT. This allows regulation down to VIN – VDS(on)·ILOAD, supporting applications like 5V output from a discharging 6V LiFePO4 battery. However, power dissipation rises significantly below 10V input due to increased RDS(on) and higher output current, requiring thermal derating per the MSE16 θJA = 45°C/W spec. The LTC3637EMSE#TRPBF includes thermal shutdown at ~180°C to prevent damage.
What are the fixed output voltage options supported by the LTC3637EMSE#TRPBF?
The LTC3637EMSE#TRPBF supports three factory-configurable fixed outputs via VPRG1 and VPRG2 pin strapping: 1.8V (both pins tied to SS), 3.3V (VPRG1 grounded, VPRG2 to SS), and 5V (VPRG1 to SS, VPRG2 grounded). Each uses internal precision resistors matched to the 0.8V reference, achieving ±1% accuracy over temperature and line. For other voltages, the LTC3637EMSE#TRPBF operates in adjustable mode with VPRG1/VPRG2 both grounded and an external resistor divider on VFB.
Does the LTC3637EMSE#TRPBF require external compensation components?
No-the LTC3637EMSE#TRPBF uses a proprietary hysteretic peak-current control architecture that is inherently stable and requires no external compensation network. It operates reliably with standard ceramic output capacitors (e.g., 47µF X5R) and does not need type-2 or type-3 compensation networks, error amplifiers, or phase-margin analysis. This simplifies design, reduces BOM count, and eliminates loop-stability risks common in voltage-mode or current-mode controllers. The LTC3637EMSE#TRPBF achieves this while maintaining tight load/line regulation and fast transient response.
LTC3637EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, 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):
- 4V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 76V
- Current - Output:
- 1A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3637EMSE#TRPBF FAQ
1.How can I place an order for LTC3637EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3637EMSE#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 LTC3637EMSE#TRPBF reliable?
The price and inventory of LTC3637EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3637EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3637EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3637EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3637EMSE#TRPBF?
LTC3637EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3637EMSE#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 LTC3637EMSE#TRPBF?
For technical support, including LTC3637EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3637EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3637EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3637EMSE#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 LTC3637EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3637EMSE#TRPBF?
All LTC3637EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3637EMSE#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 LTC3637EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3637EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3637EMSE#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…
