LTC2928CUHF#PBF - 4-Channel Power Sequencer & Supervisor | ADI
MPN: LTC2928CUHF#PBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.43 | $5.43 |
| 10 | $4.89 | $48.90 |
| 100 | $4.35 | $435.00 |
| 500 | $3.91 | $1,955.00 |
| 1,000 | $3.48 | $3,480.00 |
Drop-in alternatives for LTC2928CUHF#PBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2928IUHF#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2928CUHF#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2928CUHF#PBF
✅ Drop-In✓ In Stock
$3.48 / Unit
View Datasheet →LTC4234IWHH#PBF
⚡ Same Package📋 Reference alternative (not in catalog)
LTC2928CUHF#PBF Maximum Ratings & Electrical Characteristics
| Number of Channels | 4 |
| Type | Power Supply Sequencer and Supervisor |
| Package | 38-QFN (5x7 mm) |
| Supply Voltage Range | [DATA_NEEDED: Supply Voltage Range] |
| Operating Temperature Range | 0°C to 70°C (Commercial) |
| Cascadable | Yes |
| Sequencing Thresholds | Resistor-Programmable |
| Timing Configuration | External Components |
| Fault Output | Open-Drain |
| Over-Voltage Indication | Yes |
| Fault Event Reporting | Yes |
| Selectable System Shutdown | Yes |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
| MSL Level | [DATA_NEEDED: MSL Level] |
LTC2928CUHF#PBF Pin Configuration
| Pin 1 | VCC — Positive supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | SEQ1 — Sequencing output for supply 1 |
| Pin 4 | SEQ2 — Sequencing output for supply 2 |
| Pin 5 | SEQ3 — Sequencing output for supply 3 |
| Pin 6 | SEQ4 — Sequencing output for supply 4 |
| Pin 7 | FAULT — Open-drain fault output |
| Pin 8 | OV — Over-voltage indication output |
| Pin 9 | SHDN — Shutdown input |
| Pin 10 | CASC — Cascade input/output for multiple devices |
| Pin 11 | REF — Reference voltage output |
| Pin 12 | GND — Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LTC2928CUHF#PBF is suitable for 6 applications: FPGA Power Sequencing, Server and Storage Systems, Telecom and Networking Equipment, Industrial Control Systems, Medical Equipment, Test and Measurement Equipment.
FPGA Power Sequencing
The LTC2928CUHF#PBF sequences multiple FPGA supply rails (VCCINT, VCCAUX, VCCO) in the correct order to prevent latch-up and damage. Its resistor-programmable thresholds and timing allow easy configuration without software. With 4 channels per device and cascading capability, it can handle the multiple rails required by modern FPGAs, ensuring reliable power-up and power-down sequences. The high-accuracy supervision provides over-voltage and fault indication, protecting the FPGA from abnormal supply conditions.
Recommended
Server and Storage Systems
In servers and storage systems, multiple voltage rails (e.g., 12V, 5V, 3.3V, 1.8V) must be sequenced to ensure proper operation of CPUs, memory, and peripherals. The LTC2928CUHF#PBF provides a compact, configurable solution that sequences up to four supplies per device, with cascading for additional rails. Its fault reporting and selectable shutdown enhance system reliability, making it ideal for high-availability data center equipment.
Recommended
Telecom and Networking Equipment
Telecom and networking equipment often have multiple supply rails that must be sequenced to avoid damage to line cards, switches, and routers. The LTC2928CUHF#PBF's resistor-programmable sequencing simplifies design changes without software updates, and its cascading feature supports systems with many rails. The device's high-accuracy supervision and fault indication help maintain uptime in critical communication infrastructure.
Recommended
Industrial Control Systems
Industrial control systems require reliable power sequencing for PLCs, motor drives, and sensors. The LTC2928CUHF#PBF operates over 0°C to 70°C, suitable for many industrial environments, and its cascading capability allows expansion for complex systems. The device's fault reporting and selectable shutdown provide robust protection, ensuring safe operation in harsh conditions.
Recommended
Medical Equipment
Medical devices often have stringent power sequencing requirements to ensure patient safety and reliable operation. The LTC2928CUHF#PBF provides precise sequencing and supervision, with configurable thresholds and timing to meet specific design needs. Its small 38-QFN package is suitable for space-constrained medical devices, and its fault indication helps in diagnostics and maintenance.
Recommended
Test and Measurement Equipment
Test and measurement instruments require clean, sequenced power supplies to ensure accurate measurements. The LTC2928CUHF#PBF's low-noise operation and precise sequencing help maintain signal integrity. Its cascading capability allows it to manage multiple rails in complex instruments, and its fault reporting aids in troubleshooting, making it a reliable choice for benchtop and automated test equipment.
Recommended
Recommended Products Summary
Engineering reference data for LTC2928CUHF#PBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2928IUHF#PBF | LTC2928CUHF#TRPBF | ADM1186-1ARMZ-R7 |
|---|---|---|---|---|
| Package | 38-QFN (5x7 mm) | 38-QFN (5x7 mm) | 38-QFN (5x7 mm) | 10-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 |
| Temperature Grade | Commercial (0°C to 70°C) | Industrial (-40°C to 85°C) | Commercial (0°C to 70°C) | Industrial (-40°C to 85°C) |
| Cascadable | Yes | Yes | Yes | Yes |
| Fault Output | Open-Drain | Open-Drain | Open-Drain | Open-Drain |
| RoHS Compliant | Yes | Yes | Yes | Yes |
| Pin Compatibility | Reference | Pin-compatible | Pin-compatible | Not pin-compatible |
Key Differentiators
- Cascadable to unlimited supplies (vs ADM1186-1ARMZ-R7)
- Resistor-programmable configuration (vs LTC4234IWHH#PBF)
- High-accuracy supervision with fault reporting (vs ADM1186-1ARMZ-R7)
Design Notes
For optimal performance, place the LTC2928CUHF#PBF close to the power supplies it is sequencing. Use a solid ground plane and keep traces short and wide to minimize inductance. Place decoupling capacitors (0.1uF and 10uF) close to the VCC pin. Ensure the exposed pad is soldered to the ground plane for thermal and electrical connectivity.
The LTC2928CUHF#PBF requires a clean supply voltage for accurate threshold detection. Use a low-noise LDO or a well-filtered switching regulator to power the VCC pin. Avoid sharing the VCC pin with high-current loads that can cause voltage dips. According to the datasheet, the supply voltage range is [DATA_NEEDED: Supply Voltage Range], so verify the input voltage is within spec.
A common mistake is incorrect configuration of sequencing thresholds and timing resistors. Use precision resistors (1% or better) to set thresholds accurately. Also, ensure the cascading pins are properly connected when using multiple LTC2928s. Refer to the datasheet's typical application circuits for correct resistor values and connections.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.
