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Analog Devices Inc. LTC3630AMPDHC#TRPBF
- Part No.:
- LTC3630AMPDHC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3630AMPDHC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,896
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Product details
Overview
LTC3630AMPDHC#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 76V-input synchronous step-down DC/DC converter with integrated high-side P-channel and low-side N-channel MOSFETs. It delivers up to 500mA output current, operates from 4V to 76V input, maintains regulation down to 0.8V output, and draws only 12µA quiescent current in Burst Mode® at no load - ideal for industrial control supplies and avionics power rails requiring wide VIN tolerance and ultra-low standby power.
For engineers reviewing the LTC3630AMPDHC#TRPBF datasheet, LTC3630AMPDHC#TRPBF pinout, LTC3630AMPDHC#TRPBF application, or LTC3630AMPDHC#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature grade, programmable peak current limit (100mA–1.2A), 0.8V ±1% feedback reference, 100% duty-cycle dropout capability, and FBO-enabled parallel operation for higher-current designs.
Technical Context
The LTC3630AMPDHC#TRPBF implements a hysteretic Burst Mode® control architecture with internal feedback comparators and peak current limiting. Its dual-stage soft-start (0.8ms internal + external capacitor-programmable) prevents input droop, while the RUN pin provides precise undervoltage lockout (1.21V enable threshold, 110mV hysteresis) and shutdown mode (5µA IQ).
It integrates synchronous switching with 1.00Ω top-switch and 0.53Ω bottom-switch on-resistance, supports fixed 1.8V/3.3V/5V outputs via VPRG1/VPRG2 pin strapping, and enables adjustable outputs using an external resistor divider tied to VFB - all without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports direct regulation from 24V, 48V, and 72V industrial/avionic bus rails without pre-regulation. |
| Output Current | Up to 500mA average - limited by 100mA–1.2A programmable peak inductor current (IPEAK = 2 × IOUT(avg)). |
| Quiescent Current | 12µA typical in Burst Mode® - enables multi-year battery life in always-on remote sensors or backup systems. |
| Feedback Reference | 0.800V ±1% - sets precise output voltage with minimal divider error; supports 0.8V–VIN output range. |
| Operating Temp Range | –55°C to 150°C - qualified for harsh-environment aerospace, downhole, and military applications. |
| Package | 16-lead (5mm × 3mm) plastic DFN with exposed thermal pad - θJA = 43°C/W, requires PCB ground plane soldering for thermal reliability. |
| Switch On-Resistance | Top switch: 1.00Ω, bottom switch: 0.53Ω - determines conduction loss and thermal rise at full load. |
Pinout & Package
Package: 16-lead (5mm × 3mm) plastic DFN (DHC), thermally enhanced with exposed GND pad (Pin 17) requiring PCB soldering for thermal performance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connection point between internal high-side and low-side MOSFETs; ties to inductor; carries high di/dt switching current. |
| VIN (3) | Main input supply | Accepts 4V–76V input; requires local ceramic bypass capacitor to GND for stability and EMI reduction. |
| RUN (5) | Enable/control input | 1.21V rising threshold enables operation; 0.7V falling forces 5µA shutdown; supports resistor-divider UVLO programming. |
| VPRG1/VPRG2 (6,7) | Output voltage selection | Strap combinations set fixed 1.8V/3.3V/5V outputs; both grounded for adjustable mode using external divider. |
| GND (8,14,16,17) | Ground reference | Multiple ground pins plus exposed thermal pad (Pin 17) - must be soldered to PCB ground plane for thermal and electrical integrity. |
| VFB (9) | Feedback input | Monitors divided output voltage; compared to 0.8V reference; directly connected to output in fixed-output configurations. |
| SS (10) | Soft-start control | Capacitor-to-GND sets ramp time (1ms per 16.5nF); floating defaults to 0.8ms internal soft-start. |
| ISET (11) | Peak current programming | Resistor-to-GND sets IPEAK (100mA–1.2A); floating = max current; shorted = min current; also filters light-load ripple. |
| FBO (12) | Feedback comparator output | Open-drain output (20µA pull-up, 70Ω pull-down) enables paralleling multiple LTC3630As for >500mA total current. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET integration | Eliminates external diode, reduces conduction loss, and improves efficiency across 1mA–500mA load range. |
| Burst Mode® operation | Maintains 80%+ efficiency at 1mA load while drawing only 12µA VIN supply current - critical for energy-harvesting and battery-backed systems. |
| Programmable peak current limit | Adjusts IPEAK from 100mA to 1.2A via single resistor on ISET, enabling optimized component sizing and reduced output ripple. |
| 100% duty-cycle dropout | P-channel high-side switch allows continuous conduction when VIN ≈ VOUT - essential for brownout resilience in automotive and avionics. |
| Parallel operation support | FBO pin enables master-slave configuration of multiple LTC3630AMPDHC#TRPBF units without external logic or timing synchronization. |
Applications
| Industrial Control Supplies | Avionics Power Rails |
|---|---|
Use Scenario: Regulating 28V aircraft bus to 5V/3.3V for flight data recorders and sensor interface modules. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable, low-noise power under wide input transients (e.g., engine start dips, load dump). Use Value: 76V absolute max rating and –55°C to 150°C operation ensure uninterrupted function during extreme environmental stress and voltage surges. | Use Scenario: Powering inertial measurement units (IMUs) and GPS receivers in unmanned aerial vehicles (UAVs) with constrained thermal mass. IC Role / Device Role / Timing Role: High-efficiency, low-IQ DC/DC converter supplying regulated 3.3V from variable 12–50V LiPo/LiFe battery packs. Use Value: 12µA Burst Mode® IQ extends mission duration; programmable IPEAK allows compact 2.2µH inductor selection without sacrificing transient response. |
| Medical Diagnostic Equipment | Downhole Oil & Gas Sensors |
Use Scenario: Generating isolated auxiliary rails (e.g., ±15V analog supplies) via post-regulation from a 12V intermediate bus in portable ultrasound devices. IC Role / Device Role / Timing Role: Pre-regulator stepping 12V down to 5V with minimal heat generation near sensitive analog front-ends. Use Value: No external compensation required and low output voltage ripple (<10mV p-p) preserve signal integrity in high-resolution ADC/DAC paths. | Use Scenario: Powering MEMS pressure/temperature sensors in borehole telemetry tools operating at 150°C ambient. IC Role / Device Role / Timing Role: Primary buck converter accepting 36V–72V surface-supplied power and delivering 3.3V to radiation-hardened microcontrollers. Use Value: Extended –55°C to 150°C qualification and 80V absolute max VIN withstand capability ensure reliability in deep-well thermal and overvoltage conditions. |
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 |
|---|---|---|---|
| LTC3630AHDHC#TRPBF | Same silicon, –40°C to 150°C temp grade (vs. –55°C to 150°C); no exposed pad thermal enhancement optimization. | Not rated for extended cold-start below –40°C; unsuitable for polar/military cold-soak requirements. | Select LTC3630AMPDHC#TRPBF when operation below –40°C or enhanced thermal reliability is mandatory. |
| LM5164QPWPRQ1 | 4.5V–65V input, 500mA, 1.5MHz fixed-frequency; no Burst Mode®, higher 40µA IQ; requires external compensation. | Higher switching frequency enables smaller magnetics but sacrifices light-load efficiency and adds loop design complexity. | Choose LM5164QPWPRQ1 only if fixed-frequency EMI control or automotive AEC-Q100 qualification (Grade 1) is prioritized over ultra-low IQ. |
Compared with LTC3630AHDHC#TRPBF, the LTC3630AMPDHC#TRPBF offers verified cold-start capability to –55°C and optimized thermal pad layout for high-power-density designs; versus LM5164QPWPRQ1, it delivers superior 12µA light-load IQ and simplified design via no-compensation architecture - critical for battery-constrained and thermally isolated applications.
Availability
LTC3630AMPDHC#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power rails, medical diagnostic equipment, and downhole oil & gas sensors requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC3630AMPDHC#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 automotive, industrial, and aerospace qualification standards.
The LTC3630A product line delivers robust, wide-input synchronous buck converters optimized for harsh-environment applications where input voltage extremes, ultra-low quiescent current, and extended temperature operation are non-negotiable.
FAQ
What is the maximum input voltage rating for the LTC3630AMPDHC#TRPBF?
The LTC3630AMPDHC#TRPBF has a maximum operating input voltage of 76V and an absolute maximum rating of 80V. It is designed for direct connection to 24V, 48V, and 72V industrial and avionic bus systems. Operation above 76V is not guaranteed and may trigger overvoltage protection or permanent damage.
Does the LTC3630AMPDHC#TRPBF require external compensation components?
No, the LTC3630AMPDHC#TRPBF uses a hysteretic Burst Mode® control architecture that does not require external compensation components. Its internal feedback loop is inherently stable across the full 0.8V–VIN output range and all load conditions, simplifying design and reducing bill-of-materials count.
How is the output voltage configured on the LTC3630AMPDHC#TRPBF?
The LTC3630AMPDHC#TRPBF supports both fixed and adjustable outputs. Fixed 1.8V, 3.3V, or 5V outputs are selected by strapping VPRG1 and VPRG2 pins to GND or SS (soft-start). Adjustable outputs use an external resistor divider from VOUT to GND, with VFB connected to the divider midpoint and both VPRG pins grounded.
Can multiple LTC3630AMPDHC#TRPBF units be paralleled for higher output current?
Yes, the LTC3630AMPDHC#TRPBF includes a dedicated FBO (Feedback Comparator Output) pin that enables master-slave paralleling. Connecting the FBO of a master unit to the VFB pins of slave units synchronizes regulation and shares load current - supporting scalable solutions beyond the 500mA per device limit.
What thermal considerations apply to the LTC3630AMPDHC#TRPBF in the DFN package?
The LTC3630AMPDHC#TRPBF in the DFN (DHC) package has θJA = 43°C/W and requires the exposed thermal pad (Pin 17) to be soldered to a minimum 200mm² PCB copper ground plane. Without proper thermal pad soldering, junction temperature rise exceeds specifications, risking thermal shutdown or long-term reliability degradation at loads above 250mA.
LTC3630AMPDHC#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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3630AMPDHC#TRPBF FAQ
1.How can I place an order for LTC3630AMPDHC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AMPDHC#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 LTC3630AMPDHC#TRPBF reliable?
The price and inventory of LTC3630AMPDHC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AMPDHC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630AMPDHC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AMPDHC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AMPDHC#TRPBF?
LTC3630AMPDHC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AMPDHC#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 LTC3630AMPDHC#TRPBF?
For technical support, including LTC3630AMPDHC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AMPDHC#TRPBF requirements.
6.How does Aetrix verify that LTC3630AMPDHC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AMPDHC#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 LTC3630AMPDHC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630AMPDHC#TRPBF?
All LTC3630AMPDHC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AMPDHC#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 LTC3630AMPDHC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630AMPDHC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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