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Analog Devices Inc. LTC3630EDHC#TRPBF
- Part No.:
- LTC3630EDHC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3630EDHC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:13,896
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Product details
Overview
LTC3630EDHC#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 4V–65V input, synchronous step-down DC/DC converter with integrated high-side P-channel and low-side N-channel MOSFETs, delivering up to 500mA output current, featuring 12µA quiescent current in Burst Mode® operation, 0.8V ±1% feedback reference, and programmable peak current limit from 120mA to 1.2A. It enables compact, robust power supplies for battery-backed industrial sensors and avionics subsystems.
For engineers reviewing the LTC3630EDHC#TRPBF datasheet, LTC3630EDHC#TRPBF pinout, LTC3630EDHC#TRPBF application, or LTC3630EDHC#TRPBF equivalent, key selection considerations include its wide 4V–65V input range, internal synchronous switches, 0.8ms internal soft-start, precise RUN pin threshold (1.21V rising), and support for fixed (1.8V/3.3V/5V) or adjustable (0.8V–VIN) output configurations.
Technical Context
The LTC3630EDHC#TRPBF employs Burst Mode® control with hysteretic feedback, where regulation is maintained by alternating short burst cycles (with switching enabled) and sleep cycles (with both power switches off and only 12µA VIN supply current drawn). Its peak current comparator sets switching duration per burst, while the 0.8V feedback reference and programmable VPRG1/VPRG2 pins enable fixed-output selection without external resistors.
Startup is controlled via the RUN pin (1.21V enable threshold, 110mV hysteresis), and soft-start is implemented either internally (0.8ms) or externally via SS pin capacitor. The FBO pin provides feedback comparator output for paralleling multiple units to scale output current beyond 500mA, with pull-up current of 20µA and 70Ω pull-down impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 65V - supports direct regulation from 12V, 24V, 48V industrial rails and automotive batteries up to 60V transients. |
| Max Output Current | 500mA average - determined as half the programmable peak inductor current (up to 1.2A typical). |
| Quiescent Current | 12µA in Burst Mode® - enables multi-year battery life in always-on remote sensors and IoT edge nodes. |
| Feedback Reference | 0.800V ±1% - enables precise output regulation down to 0.8V with minimal external components in adjustable mode. |
| Peak Current Limit | Programmable 120mA–1.2A via ISET resistor - allows optimization of inductor size, output ripple, and light-load efficiency. |
| Soft-Start Time | 0.8ms internal or user-programmable via SS pin capacitor - prevents input rail droop during cold start in distributed power systems. |
| Operating Junction Temp | –40°C to +125°C - qualified for industrial control and avionics environments with full performance guaranteed. |
Pinout & Package
Package: 16-lead (5mm × 3mm) plastic DFN with exposed thermal pad (Pin 17 = GND), θJA = 43°C/W, requiring soldering of exposed pad to PCB ground plane for thermal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connection point between internal high-side and low-side MOSFETs; ties directly to inductor; voltage swings from GND to VIN. |
| VIN (3) | Main input supply | Accepts 4V–65V input; requires local ceramic bypass capacitor to GND for stability and EMI suppression. |
| RUN (5) | Enable control input | 1.21V rising threshold enables operation; 0.7V falling forces shutdown (5µA IQ); supports precision UVLO via resistor divider. |
| VPRG1 / VPRG2 (6,7) | Output voltage configuration | Set fixed outputs: both grounded = adjustable; VPRG1=SS/VPRG2=GND = 5V; VPRG1=GND/VPRG2=SS = 3.3V; both=SS = 1.8V. |
| GND (8,14,16,17) | Ground reference & thermal path | Multiple GND pins plus exposed pad (Pin 17) must be soldered to PCB ground plane for thermal performance and noise immunity. |
| VFB (9) | Feedback input | Compares divided output voltage to 0.8V reference; connected directly to output in fixed-mode or to resistor divider in adjustable mode. |
| SS (10) | Soft-start timing 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 peak current threshold (120mA–1.2A); open = max, shorted = min; also filters light-load ripple when capacitor added. |
| FBO (12) | Feedback comparator output | Open-drain output (20µA pull-up, 70Ω pull-down) used to parallel multiple LTC3630s by connecting master FBO to slave VFB pins. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET integration | Eliminates need for external catch diode and reduces conduction losses - enables >90% efficiency at 500mA with 12V→5V conversion. |
| Burst Mode® operation | Maintains regulation at ultra-light loads while drawing only 12µA - critical for energy-harvesting and battery-powered applications. |
| Programmable peak current limit | Adjusts switching behavior across load range: lower IPEAK reduces component size and output ripple; higher IPEAK increases max output capability. |
| No compensation required | Internal loop compensation eliminates external RC networks - simplifies layout, reduces BOM count, and improves reliability in harsh environments. |
| 100% duty cycle dropout operation | P-channel high-side switch enables regulation down to VIN – VDS(on) - supports brownout tolerance in automotive and industrial 24V systems. |
Applications
| Industrial Control Supplies | Avionics Power Modules |
|---|---|
Use Scenario: Regulating 24V or 48V aircraft bus to 3.3V/5V for flight data recorders and sensor interface boards. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing isolated, low-noise, high-reliability power with UVLO and thermal protection. Use Value: Withstands 65V transients and operates up to +125°C junction temperature - meets DO-160 Section 22 surge and MIL-STD-810H thermal requirements. |
Use Scenario: Powering FPGA configuration circuitry and ADC front-ends in airborne telemetry units. IC Role / Device Role / Timing Role: High-efficiency, low-quiescent-current DC/DC converter enabling extended battery runtime during pre-flight diagnostics. Use Value: 12µA Burst Mode® IQ extends lithium-thionyl chloride battery life to >5 years in standby; programmable ISET ensures stable startup under cold-cranking conditions. |
| Medical Diagnostic Sensors | Distributed Battery-Operated Instruments |
Use Scenario: Supplying 1.8V to low-power medical-grade analog front-ends in portable ECG monitors. IC Role / Device Role / Timing Role: Adjustable-output buck converter with precise 0.8V reference and low output ripple for noise-sensitive signal chains. Use Value: 0.8V ±1% VFB reference and programmable peak current enable <10mVpp output ripple - preserves SNR in sub-µV biomedical measurements. |
Use Scenario: Converting 9V alkaline or Li-ion battery voltage to regulated 5V for handheld multimeters and calibration tools. IC Role / Device Role / Timing Role: Wide-input buck regulator with soft-start and RUN-controlled sequencing for safe power-up in field-deployed instruments. Use Value: Internal 0.8ms soft-start prevents input droop during battery insertion; RUN pin enables microcontroller-controlled power gating to minimize idle leakage. |
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 |
|---|---|---|---|
| LT8609S | 4.5V–42V input, 2A output, 2.5µA IQ, Silent Switcher® architecture; no programmable peak current, fixed 3.3V/5V options only. | Better EMI performance and higher current, but narrower input range and no adjustable output mode. | Select LT8609S for noise-sensitive RF or audio systems where EMI compliance is critical and 42V max input suffices. |
| TPS54202 | 4.5V–28V input, 2A output, 26µA IQ, integrated compensation; no Burst Mode®, uses PWM-only control at light loads. | Higher light-load IQ and no true zero-load regulation - unsuitable for multi-year battery life requirements. | Select TPS54202 for cost-sensitive industrial PLC modules where 28V input ceiling and moderate efficiency are acceptable. |
Compared with LT8609S and TPS54202, the LTC3630EDHC#TRPBF uniquely combines 65V input capability, 12µA Burst Mode® IQ, and flexible output configuration (adjustable or fixed) in a thermally enhanced DFN - making it optimal for high-voltage, ultra-low-power, and design-flexible applications.
Availability
LTC3630EDHC#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power modules, and medical diagnostic sensors requiring stable component supply, long-lifecycle availability, and guaranteed parametric performance over –40°C to +125°C.
Supply support for LTC3630EDHC#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3630EDHC#TRPBF belongs to Linear's high-voltage monolithic buck converter product line, designed specifically for rugged, wide-input industrial and aerospace power applications where reliability, low IQ, and design simplicity are critical.
FAQ
What is the maximum input voltage rating for the LTC3630EDHC#TRPBF?
The LTC3630EDHC#TRPBF has an absolute maximum input voltage rating of 70V, with a specified operating input range of 4V to 65V. Operation within the 4V–65V range guarantees full electrical performance across the –40°C to +125°C junction temperature range. Exceeding 65V may trigger internal undervoltage lockout or reduce reliability, though the device remains protected up to 70V per Absolute Maximum Ratings.
How does the LTC3630EDHC#TRPBF achieve 12µA quiescent current?
The LTC3630EDHC#TRPBF achieves 12µA typical quiescent current through Burst Mode® operation: during light loads, it enters sleep cycles where both internal power switches and most control circuitry are disabled, leaving only essential bias currents active. This architecture maintains regulation while minimizing average supply current - a key enabler for battery-operated devices requiring multi-year operational life.
Can the LTC3630EDHC#TRPBF be configured for a 1.8V fixed output without external resistors?
Yes, the LTC3630EDHC#TRPBF can be configured for a precise 1.8V fixed output by connecting both VPRG1 and VPRG2 pins to the SS pin (soft-start node). This activates internal feedback resistors calibrated for 1.8V ±1.5%, eliminating the need for external divider resistors and reducing component count, board space, and sensitivity to routing noise on the VFB node.
What thermal considerations apply to the LTC3630EDHC#TRPBF in DFN package?
The LTC3630EDHC#TRPBF in the 5mm × 3mm DFN package has θJA = 43°C/W and requires soldering of the exposed thermal pad (Pin 17) to a PCB ground plane for effective heat dissipation. In dropout operation near 100% duty cycle, power dissipation rises significantly - thermal design must ensure junction temperature stays ≤125°C under worst-case load, ambient, and airflow conditions to maintain guaranteed specifications.
Is the LTC3630EDHC#TRPBF pin-compatible with other variants in the LTC3630 family?
Yes, the LTC3630EDHC#TRPBF shares identical pinout and footprint with all other DFN-package variants (e.g., LTC3630IDHC#TRPBF, LTC3630HDHC#TRPBF), differing only in temperature grade and screening. All DFN versions use the same 16-lead (5mm × 3mm) layout with exposed pad (Pin 17 = GND), enabling drop-in replacement across E/I/H/MP grades without PCB redesign.
LTC3630EDHC#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):
- 65V
- Voltage - Output (Min/Fixed):
- 0.8V (1.8V, 3.3V, 5V)
- Voltage - Output (Max):
- 65V
- 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)
LTC3630EDHC#TRPBF FAQ
1.How can I place an order for LTC3630EDHC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630EDHC#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 LTC3630EDHC#TRPBF reliable?
The price and inventory of LTC3630EDHC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630EDHC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630EDHC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630EDHC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630EDHC#TRPBF?
LTC3630EDHC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630EDHC#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 LTC3630EDHC#TRPBF?
For technical support, including LTC3630EDHC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630EDHC#TRPBF requirements.
6.How does Aetrix verify that LTC3630EDHC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630EDHC#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 LTC3630EDHC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630EDHC#TRPBF?
All LTC3630EDHC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630EDHC#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 LTC3630EDHC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630EDHC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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