LTC7821IUH#PBF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
Analog Devices LTC7821IUH#PBF is a hybrid step-down synchronous controller supporting 10 V to 72 V input in a 32-lead QFN package. It combines voltage-mode PWM control with hybrid switching to achieve high efficiency at wide input ranges. Targeted at 48 V telecom, server, and industrial DC-DC power conversion applications.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 32
- Lifecycle
- ACTIVE
- Datasheet
- LTC7821IUH#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $7.8700(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC7821IUH#PBF?
- Hybrid step-down architecture achieves high efficiency across a 10 V to 72 V input range, reducing thermal management burden
- Voltage-mode PWM control with 32-lead QFN packaging enables compact, high-density power supply board layouts
- Supports 48 V nominal bus applications common in telecom, data-center, and industrial power distribution systems
What is LTC7821IUH#PBF used for?
The LTC7821IUH#PBF is designed for 48 V bus DC-DC conversion in telecom infrastructure, data center server racks, and industrial power supplies. Its 10 V to 72 V input range accommodates wide-input industrial systems that must handle significant bus voltage variation. The hybrid control topology makes it well suited for high-density power modules where efficiency and thermal performance are critical.
What are the specifications of LTC7821IUH#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1693 |
| YTEOL | 9 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 72V |
| Input Voltage-Min | 10V |
| Input Voltage-Nom | 48V |
| JESD-30 Code | S-PQCC-N32 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 33.5V |
| Output Voltage-Min | 0.9V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 500kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LTC7821IUH#PBF datasheet?
LTC7821IUH#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC7821IUH#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LTC7821IUH#PBF support, and which bus standards does that cover?
The LTC7821IUH#PBF operates from a 10 V to 72 V input, with a 48 V nominal operating point. This range covers the 48 V telecom bus, the 48 V data-center bus standard, and 24 V industrial supply rails, making the controller versatile for server power conversion, telecom rectifiers, and motor-drive auxiliary supplies without additional input conditioning components.
How does the LTC7821IUH#PBF hybrid step-down topology improve efficiency compared to a conventional synchronous buck controller?
The hybrid step-down topology splits the conversion ratio between a switched-capacitor stage and a PWM inductor stage, reducing the voltage stress across each switch. This allows the use of lower-voltage MOSFETs with smaller on-resistance, cutting switching and conduction losses at 48 V input. The result is higher efficiency across the full load range versus a traditional single-stage buck handling the full 48 V input swing.
What package does the LTC7821IUH#PBF use, and what are the thermal implications for a 48 V to 12 V conversion design?
The LTC7821IUH#PBF is housed in a 32-lead QFN package with an exposed thermal pad that conducts heat directly into the PCB copper pour. At 48 V input converting to 12 V output at several amperes, the exposed pad lowers junction-to-board thermal resistance to under 10 °C/W with proper copper area, keeping the IC junction temperature within the industrial operating range of -40 °C to 125 °C.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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