My Inquiry
My Account
Analog Devices Inc. LTC3630AIDHC#TRPBF
- Part No.:
- LTC3630AIDHC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3630AIDHC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,441
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3630AIDHC#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, wide-input synchronous step-down DC/DC converter with integrated high-side P-channel and low-side N-channel MOSFETs. It operates from 4V to 76V input, delivers up to 500mA output current, maintains regulation down to 0.8V output, and draws only 12µA quiescent current in Burst Mode® at no load - enabling long battery life in industrial sensors and avionics power supplies.
For engineers reviewing the LTC3630AIDHC#TRPBF datasheet, LTC3630AIDHC#TRPBF pinout, LTC3630AIDHC#TRPBF application, or LTC3630AIDHC#TRPBF equivalent, key selection criteria include its programmable peak current limit (100mA–1.2A), 0.8V ±1% feedback reference, 100% duty-cycle dropout capability, and support for parallel operation via FBO pin - all in a thermally enhanced 16-lead 5mm × 3mm DFN package.
Technical Context
The LTC3630AIDHC#TRPBF uses Burst Mode® control with hysteretic feedback to achieve ultra-low quiescent current while maintaining regulation across 4V–76V input. Its internal P-channel high-side and N-channel low-side switches eliminate external gate drivers and reduce BOM count.
Peak inductor current is set by an external resistor on ISET (100kΩ → 450mA peak → 225mA avg), and output voltage is selected via VPRG1/VPRG2 pins for fixed 1.8V/3.3V/5V or adjustable mode using 0.8V reference. The FBO pin enables master-slave paralleling for >500mA applications without external current-sharing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports unregulated automotive, avionics, and industrial rails without pre-regulation. |
| Output Current | Up to 500mA - maximum average output limited to half the programmed peak current (e.g., 1A peak → 500mA avg). |
| Quiescent Current | 12µA typical in Burst Mode® - enables multi-year battery operation in always-on remote sensors. |
| Feedback Reference | 0.8V ±1% - enables precise low-voltage regulation (e.g., 1.2V @ 0.8V ref + divider) with minimal error contribution. |
| Package | 16-lead 5mm × 3mm DFN with exposed thermal pad - θJA = 43°C/W, requires soldered GND pad for thermal reliability. |
| Operating Temp | –40°C to +125°C junction - qualified for industrial control and under-hood automotive environments. |
| Switch RON | Top switch: 1.00Ω, bottom switch: 0.53Ω - determines conduction loss and thermal rise at full load. |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 3mm), 0.75mm height, exposed thermal pad (Pin 17) connected to GND. Requires PCB thermal relief and soldering of exposed pad for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connection point between internal high-side and low-side MOSFETs; ties to inductor; high dv/dt node requiring tight layout. |
| VIN (3) | Main input supply | Accepts 4V–76V; requires local 10µF ceramic bypass to GND for stability and EMI reduction. |
| RUN (5) | Enable/control input | 1.21V threshold enables operation; 0.7V shutdown; supports UVLO via resistor divider from VIN. |
| VPRG1/VPRG2 (6,7) | Output voltage selection | Configures fixed 1.8V/3.3V/5V or adjustable mode; eliminates external resistors for standard outputs. |
| GND (8,14,16,17) | Ground reference & thermal path | Pins 8/14/16 are signal GND; Pin 17 is exposed thermal pad - must be soldered to PCB ground plane. |
| VFB (9) | Feedback input | Compares divided output to 0.8V reference; connects directly to output in fixed-mode or to divider in adjustable-mode. |
| SS (10) | Soft-start control | Capacitor to GND sets ramp time (1ms per 16.5nF); internal 0.8ms default if floating. |
| ISET (11) | Peak current programming | Resistor to GND sets peak current (100mA–1.2A); determines max output current and component sizing. |
| FBO (12) | Feedback comparator output | Open-drain output (20µA pull-up, 70Ω pull-down) for paralleling multiple LTC3630As in higher-current designs. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces quiescent current to 12µA at no load while maintaining ±1% output regulation - critical for energy harvesting and battery-backed systems. |
| Integrated power switches | Eliminates need for external high-side driver and discrete MOSFETs; reduces solution size and improves efficiency over 4V–76V range. |
| Programmable peak current limit | Adjusts from 100mA to 1.2A via single resistor on ISET - enables optimization of inductor/capacitor size and light-load ripple vs. efficiency trade-off. |
| 100% duty-cycle dropout | Enables regulation down to VIN – VDS(ON); supports operation during brownout when input drops near output voltage. |
| Parallel operation support | FBO pin allows master-slave configuration of multiple LTC3630As without external current-sense or control ICs - scales output current beyond 500mA. |
Applications
| Industrial Control Supply | Avionics Power Module |
|---|---|
Use Scenario: Powering isolated analog front-ends and microcontrollers in PLC I/O modules operating from 24V or 48V DC rails with strict standby current limits. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering 3.3V/500mA with <12µA quiescent draw during sleep cycles. Use Value: Enables >10-year battery backup life in remote sensor nodes while maintaining fast wake-up response via RUN pin control. |
Use Scenario: Generating 5V for flight data recorders and inertial measurement units (IMUs) from 28V aircraft bus with transient tolerance up to 76V. IC Role / Device Role / Timing Role: High-reliability step-down converter with built-in UVLO and thermal shutdown, supporting MIL-STD-704 compliance. Use Value: Sustains regulated output during engine cranking dips and load dump transients without external protection circuitry. |
| Portable Medical Instrument | Automotive Telematics Unit |
Use Scenario: Powering low-noise ADCs and wireless SoCs in handheld ultrasound probes powered by Li-ion batteries (8.4V–12.6V) with strict EMI constraints. IC Role / Device Role / Timing Role: Efficient 1.8V/300mA supply using adjustable mode and optimized inductor value to minimize conducted emissions. Use Value: Achieves >85% efficiency at 10mA–500mA loads while meeting CISPR-22 Class B radiated emission limits. |
Use Scenario: Regulating 3.3V for GPS/GNSS receivers and cellular modems in vehicle infotainment systems exposed to cold-crank (4.5V) and load-dump (60V+) events. IC Role / Device Role / Timing Role: Input-robust buck converter with programmable UVLO and 76V absolute max rating - replaces discrete protection + LDO solutions. Use Value: Reduces bill-of-materials by integrating overvoltage clamping, enable sequencing, and current limiting into single IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 300mA, 1.5MHz fixed-frequency, no integrated low-side switch - requires external sync rectifier. | Higher switching frequency enables smaller magnetics but lacks Burst Mode® efficiency below 10mA. | Choose LM5164QDDARQ1 for space-constrained designs needing >1MHz operation and AEC-Q100 qualification; avoid where <15µA IQ is mandatory. |
| MAX20004AATP+T | 3.5V–65V input, 600mA, 2.2MHz, integrated MOSFETs, 2.5µA shutdown current - no programmable peak current or FBO pin. | Superior light-load efficiency via skip-mode, but no master-slave paralleling or wide 4V–76V range. | Choose MAX20004AATP+T for automotive body electronics requiring AEC-Q100 Grade 1 and lower EMI; avoid for >65V input or current scaling needs. |
Compared with LM5164QDDARQ1 and MAX20004AATP+T, the LTC3630AIDHC#TRPBF uniquely combines 76V input capability, 12µA Burst Mode® IQ, programmable peak current, and FBO-based paralleling - making it optimal for high-voltage industrial and avionics applications where input range, ultra-low standby power, and scalable current are jointly required.
Availability
LTC3630AIDHC#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power modules, portable medical instruments, and automotive telematics units requiring stable component supply across extended temperature and voltage ranges.
Supply support for LTC3630AIDHC#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 LTC3630AIDHC#TRPBF belongs to ADI's Power by Linear™ family of high-voltage DC/DC converters, designed specifically for ruggedized power conversion in industrial, aerospace, and automotive systems where wide input range and ultra-low quiescent current are essential.
FAQ
What is the maximum input voltage rating for the LTC3630AIDHC#TRPBF?
The LTC3630AIDHC#TRPBF has an absolute maximum input voltage rating of 80V and a recommended operating range of 4V to 76V. Operation above 76V is not guaranteed and may trigger internal overvoltage protection or cause permanent damage. The 76V upper limit ensures reliable operation across automotive load-dump and industrial rail transients while maintaining specified electrical characteristics.
How does the ISET pin function in the LTC3630AIDHC#TRPBF?
The ISET pin on the LTC3630AIDHC#TRPBF programs the peak inductor current limit via an external resistor to GND. A 100kΩ resistor sets ~450mA peak current (225mA average), while floating yields 1.2A peak (600mA avg). The internal 5µA current source generates a voltage that adjusts the current comparator threshold, directly determining inductor size, output ripple, and light-load efficiency trade-offs.
Can multiple LTC3630AIDHC#TRPBF devices be paralleled for higher output current?
Yes, the LTC3630AIDHC#TRPBF supports current sharing via its FBO (Feedback Comparator Output) pin. Connecting the FBO of a master device to the VFB pins of one or more slave devices forces all units to regulate to the same output voltage, enabling combined output currents exceeding 500mA without external current-sense resistors or control ICs - verified in Linear Technology Application Note 158.
What is the purpose of the exposed thermal pad (Pin 17) on the LTC3630AIDHC#TRPBF DFN package?
The exposed thermal pad (Pin 17) on the LTC3630AIDHC#TRPBF is electrically and thermally connected to GND. It must be soldered to a PCB copper pour to achieve the specified θJA of 43°C/W. Omitting this connection degrades thermal performance by >25°C/W, risking thermal shutdown under 500mA load at elevated ambient temperatures.
Does the LTC3630AIDHC#TRPBF support fixed-output voltages without external resistors?
Yes, the LTC3630AIDHC#TRPBF supports factory-configurable fixed outputs of 1.8V, 3.3V, or 5V using its VPRG1 and VPRG2 pins - eliminating external feedback resistors and reducing noise sensitivity. Shorting VPRG1 and VPRG2 to SS selects 1.8V; VPRG1 to SS and VPRG2 to GND selects 5V; VPRG1 to GND and VPRG2 to SS selects 3.3V. This feature simplifies design and improves accuracy versus discrete resistor dividers.
LTC3630AIDHC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 0.8V (1.8V, 3.3V, 5V)
- Voltage - Output (Max):
- 76V
- Current - Output:
- 500mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3630AIDHC#TRPBF FAQ
1.How can I place an order for LTC3630AIDHC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AIDHC#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 LTC3630AIDHC#TRPBF reliable?
The price and inventory of LTC3630AIDHC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AIDHC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630AIDHC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AIDHC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AIDHC#TRPBF?
LTC3630AIDHC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AIDHC#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 LTC3630AIDHC#TRPBF?
For technical support, including LTC3630AIDHC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AIDHC#TRPBF requirements.
6.How does Aetrix verify that LTC3630AIDHC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AIDHC#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 LTC3630AIDHC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630AIDHC#TRPBF?
All LTC3630AIDHC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AIDHC#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 LTC3630AIDHC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630AIDHC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3630AIDHC#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…
