My Inquiry
My Account
Analog Devices Inc. LTC3630HDHC#PBF
- Part No.:
- LTC3630HDHC#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3630HDHC#PBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,531
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3630HDHC#PBF 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 no-load quiescent current, programmable peak current limit (100mA–1.2A), and 0.8V ±1% feedback reference - used in industrial control supplies and avionics power regulation.
For engineers reviewing the LTC3630HDHC#PBF datasheet, LTC3630HDHC#PBF pinout, LTC3630HDHC#PBF application, or LTC3630HDHC#PBF equivalent, this page delivers verified package mapping (16-lead 5mm × 3mm DFN), thermal specs (–40°C to 150°C junction), Burst Mode® operation details, ISET-programmable current limit, and FBO-enabled paralleling capability - all confirmed from official Linear Technology documentation.
Technical Context
The LTC3630HDHC#PBF implements a hysteretic Burst Mode® control architecture with internal 0.8V feedback reference and dual-stage RUN pin comparator (1.21V rising / 1.10V falling threshold, 110mV hysteresis), enabling ultra-low-noise, high-efficiency regulation across wide load ranges. Its P-channel high-side switch supports true 100% duty-cycle dropout operation down to VIN ≈ VOUT.
Peak current is set via external resistor on ISET pin (5µA current source), directly determining maximum average output current (IOUT_MAX = 0.5 × IPEAK); soft-start is implemented via internal 0.8ms timer or external capacitor on SS pin (5µA charge current), while FBO pin provides open-drain feedback-comparator output for master-slave paralleling of multiple converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 65V - supports wide-range industrial, automotive, and avionics inputs without pre-regulation. |
| Output Current | Up to 500mA - determined by programmable peak current limit (100mA–1.2A), with IOUT_MAX = 0.5 × IPEAK. |
| Quiescent Current | 12µA typical in Burst Mode® sleep - enables multi-year battery life in always-on portable instruments. |
| Feedback Reference | 0.800V ±1% - precise internal voltage reference enabling accurate adjustable output regulation. |
| Operating Temperature | –40°C to 150°C junction - qualified for high-reliability industrial and avionics applications. |
| Switching Architecture | Synchronous Buck with integrated P-ch high-side and N-ch low-side MOSFETs - eliminates external diode, improves efficiency. |
| Package Thermal Resistance | θJA = 43°C/W, θJC = 5°C/W - thermally enhanced 5mm × 3mm DFN with exposed GND pad for PCB heat sinking. |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 3mm, 0.75mm height), exposed GND pad (Pin 17) requiring solder connection to PCB ground plane for thermal and electrical performance.
| 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 dv/dt switching waveform. |
| VIN (3) | Main Input Supply | Primary power input (4V–65V); requires local ceramic bypass capacitor to GND for stability and EMI suppression. |
| RUN (5) | Enable/UVLO Control | Logic-level enable with precise 1.21V rising threshold; resistor divider from VIN sets input undervoltage lockout. |
| VPRG1/VPRG2 (6,7) | Output Voltage Selection | Configure fixed 1.8V/3.3V/5V or adjustable output by grounding or connecting to SS pin per datasheet truth table. |
| GND (8,14,16,17) | Ground Reference | Four dedicated ground terminals plus exposed thermal pad (Pin 17) - must be soldered to PCB ground for thermal integrity. |
| VFB (9) | Feedback Input | Compares divided output voltage against 0.8V reference; connects to resistive divider (adjustable mode) or directly to VOUT (fixed mode). |
| SS (10) | Soft-Start Control | Capacitor-to-GND sets output ramp time (1ms per 16.5nF); internal 0.8ms default if floating. |
| ISET (11) | Peak Current Programming | Resistor-to-GND sets peak inductor current (100mA–1.2A); 5µA current source enables simple, predictable IOUT scaling. |
| FBO (12) | Feedback Comparator Output | Open-drain output (20µA pull-up, 70Ω pull-down) for paralleling multiple LTC3630s in higher-current applications. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Enables 12µA no-load IQ while maintaining regulation - critical for battery-powered medical devices and remote sensors. |
| Programmable Peak Current Limit | Adjustable 100mA–1.2A via single resistor on ISET pin - optimizes component size, ripple, and efficiency for specific load profiles. |
| 100% Duty-Cycle Dropout | P-channel high-side switch allows continuous conduction when VIN approaches VOUT - essential for brownout resilience in avionics. |
| Internal Soft-Start + External SS Pin | Guaranteed controlled startup: 0.8ms internal timer or user-defined ramp via capacitor - prevents input droop in distributed power systems. |
| Master-Slave Paralleling via FBO | Single FBO pin drives VFB of slave converters - enables scalable 1A+ outputs without external controllers or complex timing alignment. |
Applications
| Industrial Control Supplies | Avionics Power Regulation |
|---|---|
Use Scenario: Regulating 24V or 28V aircraft bus to 3.3V/5V for flight control microcontrollers and sensor interfaces. IC Role / Device Role / Timing Role: Primary non-isolated point-of-load regulator with precise RUN threshold and thermal robustness. Use Value: 150°C junction rating and 65V max input withstand transient surges common in MIL-STD-704 avionics power buses. |
Use Scenario: Powering fault-tolerant data acquisition modules in engine monitoring systems requiring long-term reliability. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with Burst Mode® for low-power wake-up states. Use Value: 12µA quiescent current extends battery backup runtime during extended ground maintenance periods. |
| Medical Devices | Portable Instruments |
Use Scenario: Providing isolated 5V rail for patient-connected diagnostic sensors in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Main DC/DC regulator with low EMI Burst Mode® operation and precise 0.8V reference for stable analog front-end biasing. Use Value: No external compensation required reduces BOM count and layout sensitivity - critical for compact Class II medical designs. |
Use Scenario: Converting Li-ion battery (3.0–4.2V) or 12V field supply to 1.8V/3.3V for handheld test equipment logic and ADCs. IC Role / Device Role / Timing Role: Wide-input synchronous buck with programmable ISET to match varying load demands across measurement modes. Use Value: Adjustable peak current (100mA–1.2A) allows optimization of inductor/capacitor size for handheld form factor constraints. |
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 | 42V max input, 2A output, Silent Switcher® architecture; higher IQ (2.5µA) but no programmable peak current. | Preferred where EMI-sensitive environments (e.g., MRI-adjacent circuits) demand spread-spectrum switching. | Select LT8609S only if EMI compliance is primary concern and 2A output is needed; LTC3630HDHC#PBF retains advantage in 65V input and programmable light-load behavior. |
| TPS54360B | 60V max input, 3.5A output, external MOSFETs; higher IQ (14µA), no integrated low-side switch or Burst Mode®. | Suitable for higher-current industrial motor drives where thermal headroom exceeds DFN limits. | Choose TPS54360B when >500mA output or discrete FET control is required; LTC3630HDHC#PBF offers superior integration and lower IQ for space-constrained 500mA apps. |
Compared with LT8609S and TPS54360B, the LTC3630HDHC#PBF uniquely combines 65V input tolerance, 12µA Burst Mode® IQ, and resistor-programmable peak current in a thermally optimized DFN - making it optimal for high-voltage, low-quiescent, and size-sensitive embedded power rails.
Availability
LTC3630HDHC#PBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power regulation, and portable instruments requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC3630HDHC#PBF 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 full product support, qualification, and documentation for legacy Linear parts including the LTC3630 series.
The LTC3630 product line was designed for high-input-voltage, low-quiescent-current synchronous buck conversion in harsh-environment applications - emphasizing thermal robustness, programmable operation, and minimal external components.
FAQ
What is the maximum input voltage rating for the LTC3630HDHC#PBF?
The LTC3630HDHC#PBF has an absolute maximum input voltage rating of 70V, with guaranteed operation from 4V to 65V. This 65V operating range enables direct regulation from unregulated 48V telecom, 24V industrial, or 28V avionics bus supplies without pre-regulation stages. Exceeding 65V may trigger internal overvoltage protection or reduce lifetime reliability.
How does the ISET pin on the LTC3630HDHC#PBF control output current?
The ISET pin on the LTC3630HDHC#PBF sources a 5µA (1µA in sleep mode) current that develops a voltage across an external resistor to ground, setting the peak inductor current threshold. Since maximum average output current equals half the peak current, a 220kΩ resistor yields ~500mA output, while 100kΩ gives ~100mA - enabling precise, resistor-based current scaling without feedback loop redesign.
Can the LTC3630HDHC#PBF operate in 100% duty cycle mode?
Yes, the LTC3630HDHC#PBF supports true 100% duty cycle operation due to its P-channel high-side MOSFET, allowing continuous conduction when input voltage drops near the output voltage. This dropout capability ensures uninterrupted regulation during brownout conditions - critical for avionics and industrial systems where input transients are common.
What is the purpose of the FBO pin on the LTC3630HDHC#PBF?
The FBO (Feedback Comparator Output) pin on the LTC3630HDHC#PBF is an open-drain output that replicates the internal feedback comparator state. Connecting the FBO of a master LTC3630HDHC#PBF to the VFB pins of slave units forces synchronized regulation and current sharing - enabling scalable output currents beyond 500mA without external current-sense or timing circuitry.
Does the LTC3630HDHC#PBF require external compensation components?
No, the LTC3630HDHC#PBF uses a hysteretic Burst Mode® control architecture that requires no external compensation components. Its internal feedback loop is inherently stable across all loads and input/output combinations - reducing BOM count, layout complexity, and validation effort compared to voltage-mode or current-mode controllers needing RC networks.
LTC3630HDHC#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3630HDHC#PBF FAQ
1.How can I place an order for LTC3630HDHC#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630HDHC#PBF 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 LTC3630HDHC#PBF reliable?
The price and inventory of LTC3630HDHC#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630HDHC#PBF is usually 5 days.
3.What payment methods are accepted for LTC3630HDHC#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630HDHC#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630HDHC#PBF?
LTC3630HDHC#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630HDHC#PBF 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 LTC3630HDHC#PBF?
For technical support, including LTC3630HDHC#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630HDHC#PBF requirements.
6.How does Aetrix verify that LTC3630HDHC#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3630HDHC#PBF 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 LTC3630HDHC#PBF meets industry standards.
7.What is the process for return or replacement of LTC3630HDHC#PBF?
All LTC3630HDHC#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630HDHC#PBF, 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 LTC3630HDHC#PBF part is unused and in its original packaging.
Return procedure for LTC3630HDHC#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3630HDHC#PBF 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…
