My Inquiry
My Account
Analog Devices Inc. LTC7103RUHE-1#TRPBF
- Part No.:
- LTC7103RUHE-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 36-WFQFN, 26 Leads, Exposed Pad
- Datasheet:
-
LTC7103RUHE-1#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2.3A 36QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,134
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7103RUHE-1#TRPBF from Analog Devices is a 105V, 2.3A monolithic synchronous step-down DC/DC regulator with average current mode control, operating from 4.4V to 105V input and delivering adjustable 1V to VIN output. It features 40ns minimum on-time, 100% duty cycle capability, and integrated current programming/monitoring without external sense resistors - enabling high-ratio conversion in battery charger and industrial power supply applications.
For engineers reviewing the LTC7103RUHE-1#TRPBF datasheet, LTC7103RUHE-1#TRPBF pinout, LTC7103RUHE-1#TRPBF application, or LTC7103RUHE-1#TRPBF equivalent, key selection criteria include wide-input voltage handling (up to 105V), fast current programming accuracy (±2.5% ILIM), CISPR 25-compliant low-EMI operation, and support for Burst Mode®, pulse-skipping, or forced continuous light-load modes.
Technical Context
The LTC7103RUHE-1#TRPBF implements constant-frequency average current mode control using internal top/bottom switch current sensing and lossless inductor current reconstruction via RIND-based ramp generation. Its dual-loop architecture separates fast average current regulation (via ITH) from voltage loop compensation (via VFB/ITH), enabling precise CC/CV control without external RSENSE.
It integrates a programmable 200kHz–2MHz oscillator with PLL synchronization capability, OPTI-LOOP® or fixed internal compensation, EXTVCC-powered LDO for efficiency optimization, and comprehensive protection including input/output overvoltage, thermal shutdown, and brick-wall current limiting - all within a thermally enhanced 5mm × 6mm QFN package rated for –40°C to 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4V to 105V - supports direct connection to 48V/72V/96V industrial and automotive battery buses without pre-regulation. |
| Max Output Current | 2.3A continuous - delivers full-rated load at high step-down ratios (e.g., 72V→5V) with minimal derating. |
| Min On-Time | 40ns - enables stable 300kHz switching at 72V→3.3V (4.6% duty cycle) without pulse skipping. |
| Quiescent Current | 2µA at 48VIN→3.3VOUT - extends battery life in always-on systems such as telematics and remote sensors. |
| Current Programming Accuracy | ±2.5% average output current limit - enables precise CC/CV battery charging without calibration. |
| EMI Performance | CISPR 25 Class 5 compliant - meets automotive radiated emission limits without added filtering in typical layouts. |
| Package Thermal Resistance | θJC = 5°C/W - allows >2W dissipation with moderate heatsinking on PCB exposed pad. |
Pinout & Package
Package: 36-lead (5mm × 6mm) plastic QFN with exposed PGND pad (Pin 37), rated for –40°C to 150°C junction temperature. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (3) | Enable control input | Holding <1.1V disables regulator; <0.7V reduces IQ to 0.7µA - enables undervoltage lockout via resistor divider from VIN. |
| VIN (30,31,32) | Main power input | Supplies high-side MOSFET drain and internal VIN LDO - requires local 10µF+ ceramic decoupling to PGND. |
| SW (24,25,26) | Switch node | Connects internal top/bottom FETs to external inductor - high di/dt path requiring tight layout and Kelvin connection. |
| BOOST (27) | Floating gate drive supply | Requires 0.1µF ceramic capacitor to SW - sustains high-side drive during 100% duty cycle operation via internal charge pump. |
| ICTRL (16) | Average current setpoint | 0.4V–1.3V input programs 0–2.5A average output current - internal 20µA pull-up enables single-resistor programming. |
| IMON (17) | Current monitor output | 0.4V–1.3V analog voltage proportional to average output current - enables real-time telemetry without sense resistor losses. |
| FREQ (11) | Switching frequency control | Sets fSW from 200kHz–2MHz via resistor to SGND - higher frequencies reduce inductor size but increase switching loss. |
| PLLIN/MODE (12) | Sync input / light-load mode select | Accepts external clock for phase alignment; tied to INTVCC for pulse-skipping, SGND for Burst Mode®, or floating for forced continuous. |
| PGOOD (14) | Open-drain status flag | Pulled low when VFB deviates >10% from target - provides system-level power-good signaling with 24µs fault delay. |
| EXTVCC (20) | Efficiency-optimized bias supply | Accepts 3.3V–40V to power INTVCC LDO - bypasses VIN LDO, reducing power loss in high-VIN applications. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current programming & monitoring | Eliminates external RSENSE and sense amplifier - saves board space, improves accuracy, and avoids 1–2% power loss from sense resistor. |
| PassThru™ 100% duty cycle operation | Enables dropout-free operation down to VIN – VOUT ≈ 0.5V - critical for maintaining output during cold-crank or brownout conditions. |
| OPTI-LOOP® compensation | Automatically adjusts voltage loop compensation based on switching frequency - ensures stability across full 200kHz–2MHz range without manual tuning. |
| Eight-pin-selectable fixed outputs | Configurable 1.2V–15V fixed outputs via VPRG1/VPRG2 pins - simplifies design for common rail voltages without feedback divider. |
| Thermally enhanced QFN | 5mm × 6mm footprint with exposed PGND pad - achieves θJC = 5°C/W, enabling 2.3A operation at 150°C junction temperature with proper PCB copper. |
Applications
| Battery Chargers | Automotive Power Systems |
|---|---|
Use Scenario: Constant-current/constant-voltage charging of 12S Li-ion packs (up to 50.4V) from 72V traction battery or 48V auxiliary bus. IC Role / Device Role / Timing Role: Primary buck regulator providing programmable CC/CV output with real-time current monitoring via IMON pin. Use Value: Eliminates external current sense resistor and amplifier, reducing BOM cost and thermal stress while maintaining ±2.5% current regulation accuracy. | Use Scenario: Powering ADAS domain controllers and radar modules from vehicle 48V or 12V battery with cold-crank immunity. IC Role / Device Role / Timing Role: High-input-voltage buck converter supporting PassThru™ mode to sustain 3.3V/5V rails during 4V–6V cranking events. Use Value: 100% duty cycle operation maintains regulated output down to VIN = VOUT + 0.5V, preventing system reset during engine start. |
| Industrial HVDC Supplies | Avionics Power Conversion |
Use Scenario: Converting 96V telecom rectifier output to isolated 12V intermediate bus for downstream POL converters. IC Role / Device Role / Timing Role: Front-end non-isolated buck stage delivering 2.3A with ultralow EMI per CISPR 25 Class 5. Use Value: Integrated spread-spectrum and optimized switching edge rates meet stringent radiated emissions requirements without ferrite beads or shielding. | Use Scenario: Powering flight control computers and inertial measurement units from 28V aircraft bus with AEC-Q100-aligned reliability. IC Role / Device Role / Timing Role: High-reliability buck regulator with input/output overvoltage protection and –40°C to 150°C operation. Use Value: Dual OVLO protection (VIN and VOUT) prevents latch-up during transients; exposed-pad QFN ensures thermal margin in conduction-cooled avionics enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7103RUHE#TRPBF | Lacks continuous inductor current mode; no pulse-skipping option at light loads. | Not suitable for applications requiring smooth light-load regulation without output ripple. | Select only if Burst Mode® is sufficient and continuous conduction is not required. |
| LM5164QPWPRQ1 | 65V max input, 1A output, no integrated current monitoring or programming; requires external RSENSE. | Lower voltage/current rating; lacks IMON/ICTRL interface for battery management systems. | Choose for cost-sensitive 48V automotive apps where 2.3A and precision current control are unnecessary. |
Compared with LTC7103RUHE#TRPBF, the LTC7103RUHE-1#TRPBF adds continuous inductor current mode and pulse-skipping operation - enabling smoother light-load regulation and wider control flexibility. Versus LM5164QPWPRQ1, it offers 105V input, 2.3A output, and integrated current sensing - making it suitable for high-power, high-accuracy industrial and aerospace applications where the TI part falls short on voltage, current, and feature integration.
Availability
LTC7103RUHE-1#TRPBF is available at Aetrix Electronics and suitable for battery chargers, automotive power systems, industrial HVDC supplies, and avionics power conversion requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC7103RUHE-1#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC7103 product line delivers high-voltage, high-efficiency synchronous buck regulators with advanced current-mode control and integrated power management features - designed specifically for demanding battery-powered, automotive, and industrial systems requiring wide input range and precision regulation.
FAQ
What is the maximum input voltage rating for the LTC7103RUHE-1#TRPBF?
The LTC7103RUHE-1#TRPBF has an absolute maximum input voltage rating of 110V, with a specified operating input voltage range of 4.4V to 105V. This allows direct connection to 48V, 72V, and 96V industrial and automotive battery systems without external pre-regulation. Operation above 105V is not guaranteed and may trigger internal overvoltage protection.
Does the LTC7103RUHE-1#TRPBF require an external current sense resistor?
No, the LTC7103RUHE-1#TRPBF does not require an external current sense resistor. It implements lossless average current sensing using internal top and bottom switch current monitoring combined with RIND-based inductor current reconstruction. Current programming (ICTRL) and monitoring (IMON) are fully integrated, eliminating RSENSE-related power loss and board area.
How does the EXTVCC pin improve efficiency in the LTC7103RUHE-1#TRPBF?
The EXTVCC pin on the LTC7103RUHE-1#TRPBF powers an internal LDO that generates INTVCC, bypassing the higher-loss VIN-based LDO when EXTVCC is between 3.1V and 40V. In a typical 48V→5V application, connecting EXTVCC to VOUT reduces total IC power dissipation by ~30%, lowering junction temperature and improving full-load efficiency by up to 1.2 percentage points.
Can the LTC7103RUHE-1#TRPBF synchronize to an external clock?
Yes, the LTC7103RUHE-1#TRPBF supports external clock synchronization via the PLLIN/MODE pin. When an external clock is applied, its phase-locked loop aligns the rising edge of the SW signal to the external clock's rising edge. This enables deterministic timing across multiple regulators in parallel or multi-phase configurations, reducing beat frequencies and system-level EMI.
What thermal considerations apply to the LTC7103RUHE-1#TRPBF package?
The LTC7103RUHE-1#TRPBF uses a 36-lead 5mm × 6mm QFN with exposed PGND pad (Pin 37). For rated thermal performance, the exposed pad must be soldered to a minimum 400mm² PCB copper area with ≥4 thermal vias. With this layout, θJC = 5°C/W enables 2.3A operation at 150°C junction temperature; insufficient copper or missing vias will cause premature thermal shutdown.
LTC7103RUHE-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-WFQFN, 26 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):
- 4.4V
- Voltage - Input (Max):
- 105V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 105V
- Current - Output:
- 2.3A
- Frequency - Switching:
- 200kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-QFN (5x6)
LTC7103RUHE-1#TRPBF FAQ
1.How can I place an order for LTC7103RUHE-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7103RUHE-1#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 LTC7103RUHE-1#TRPBF reliable?
The price and inventory of LTC7103RUHE-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7103RUHE-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7103RUHE-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7103RUHE-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7103RUHE-1#TRPBF?
LTC7103RUHE-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7103RUHE-1#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 LTC7103RUHE-1#TRPBF?
For technical support, including LTC7103RUHE-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7103RUHE-1#TRPBF requirements.
6.How does Aetrix verify that LTC7103RUHE-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7103RUHE-1#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 LTC7103RUHE-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7103RUHE-1#TRPBF?
All LTC7103RUHE-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7103RUHE-1#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 LTC7103RUHE-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC7103RUHE-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7103RUHE-1#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…
