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Analog Devices Inc. LTC7880IUKG#PBF
- Part No.:
- LTC7880IUKG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC7880IUKG#PBF.pdf
- Description:
- 60V DUAL STEP-UP CONTROLLER WITH
- Quantity:
- Payment:
- Shipping:
Inventory:1,959
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Product details
Overview
LTC7880IUKG#PBF from Analog Devices is a dual-output, 60V synchronous step-up DC/DC controller with PMBus/I²C digital power system management, constant-frequency current-mode control, and independent programmable loop compensation for each channel. It supports up to 6-phase PolyPhase® operation, delivers ±0.5% output voltage accuracy over temperature, and integrates 16-bit ADCs and 12-bit DACs for telemetry readback in industrial and automotive start-stop power systems.
For engineers reviewing the LTC7880IUKG#PBF datasheet, LTC7880IUKG#PBF pinout, LTC7880IUKG#PBF application, or LTC7880IUKG#PBF equivalent, key selection considerations include its 52-lead QFN package, dual 5V–40V input / up-to-60V output capability, I²C/PMBus telemetry (input/output voltage/current, temperature, faults), programmable gate drive (6.3V–9V), and independent FAULT/PGOOD per channel.
Technical Context
The LTC7880IUKG#PBF implements analog current-mode control with digitally configurable PWM loop compensation via internal EEPROM-stored parameters. Its two independent boost channels support phase interleaving up to six total phases using external SYNC clocking, enabling high-current, low-ripple output with accurate PolyPhase® current sharing (±1% typical).
It embeds a full PMBus v1.3-compliant interface with telemetry readback, fault logging, digital soft-start/stop, sequencing, margining, and OV/UV/OC protection. Internal 16-bit ADCs monitor VIN, VOUT, IIN, IOUT, and temperature (internal/external), while 12-bit DACs enable precise voltage programming and servo-based regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 40V continuous; operates down to 2.5V after startup when VBIAS is powered from VOUT - enables cold-crank and automotive start-stop compatibility. |
| Output Voltage Range | Up to 60V per channel (VOUT0: ≤60V; VOUT1: ≤30V) - supports high-voltage bias rails for amplifiers, sensors, and industrial actuators. |
| Switching Frequency | 50kHz to 500kHz, programmable via resistor or PMBus - allows optimization of efficiency vs. size for 6.8µH inductors and ceramic output capacitors. |
| Output Accuracy | ±0.5% over temperature (8V–58V range) - achieved via auto-zeroed ADC feedback and digital servo mode, critical for precision analog supply rails. |
| PolyPhase® Support | Up to 6 phases with accurate current sharing (±1%) - reduces input/output ripple, thermal stress, and EMI in high-power (>50A) applications. |
| Digital Interface | PMBus v1.3 / I²C compliant with 10–400kHz clock, integrated EEPROM with ECC, CRC-protected commands - enables firmware-updatable power policies and field calibration. |
| Package | 52-lead (7mm × 8mm) QFN with exposed GND pad - provides low thermal resistance (θJC = 2°C/W) for high-efficiency operation at 125°C junction temperature. |
Pinout & Package
Package: 52-lead plastic QFN (7mm × 8mm), exposed thermal pad (Pin 53 = GND). Requires soldering of exposed pad to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN0, VIN1 | Primary input voltage inputs | Accept independent 5V–40V supplies per channel; support split-rail or redundant input configurations. |
| BOOST0, BOOST1 | Bootstrap supply for high-side N-MOSFET gates | Enable 6.3V–9V programmable gate drive; tolerate up to 76V transient - ensures robust high-side switching in 60V boost topologies. |
| TG0, TG1 | Top-gate drivers (high-side N-MOSFET) | Drive external high-side MOSFETs with 30ns rise/fall time (3300pF load); support >92% max duty cycle for wide VIN–VOUT ratios. |
| BG0, BG1 | Bottom-gate drivers (low-side N-MOSFET) | Complement TG outputs with 20ns rise/fall time and 50ns dead-time control - prevents shoot-through in synchronous rectification. |
| ISENSE0+, ISENSE0− ISENSE1+, ISENSE1− |
Differential current sense inputs | Support DCR or discrete shunt sensing (±100A full-scale); 10-bit resolution with programmable gain (2x/4x/8x) for accurate load monitoring. |
| PGOOD0, PGOOD1 | Open-drain power-good indicators | Assert after soft-start and voltage regulation validation; 60µs digital filtering eliminates false triggers during transients. |
| FAULT0, FAULT1 | Open-drain fault indicators | Signal OV, UV, OC, OT, or timing faults per channel; 3µs digital filtering ensures fast, noise-immune response. |
| SDA, SCL, ALERT | PMBus/I²C bidirectional interface | Support multi-drop bus with address selection (RCONFIG pins); ALERT signals register events without polling - reduces host CPU overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 16-bit ADC + 12-bit DAC | Enables closed-loop digital servo mode for ±0.5% VOUT accuracy and real-time telemetry (VIN, VOUT, IIN, IOUT, TINT/TEXT) without external components. |
| EEPROM with ECC and fault logging | Stores configuration, calibration data, and up to 16 fault records with timestamps - supports field diagnostics and failure root-cause analysis. |
| Programmable gate drive (6.3V–9V) | Optimizes RDS(on) vs. switching loss trade-off for diverse MOSFETs; improves efficiency by up to 1.5% at 10A output in 24V→48V conversion. |
| Independent soft-start, sequencing, margining | Per-channel digital ramp control (0.1–255ms) and voltage offset (±5%) - meets strict power-up timing requirements in FPGA and ASIC supplies. |
| Discontinuous or continuous conduction mode | Configurable pulse-skipping or forced CCM operation - balances light-load efficiency (≥93% at 100mA) with output ripple control (<20mVpp) at full load. |
Applications
| Automotive Start-Stop Systems | Industrial High-Voltage Bias Rails |
|---|---|
|
Use Scenario: Maintaining stable 24V/48V auxiliary rail during engine cranking (VIN drops to 2.5V) in 12V/48V dual-battery vehicles. IC Role / Device Role / Timing Role: Dual-channel synchronous boost controller managing pre-biased startup, cold-crank recovery, and seamless transition between battery sources. Use Value: Delivers uninterrupted power to ADAS cameras and radar modules with <100µs fault response and ±0.5% regulation across –40°C to 125°C. |
Use Scenario: Generating 60V bias for piezoelectric actuators and high-voltage op-amps in semiconductor test equipment. IC Role / Device Role / Timing Role: Precision programmable boost controller with digital margining and telemetry for calibration-critical analog subsystems. Use Value: Enables remote voltage tuning (±5%) and real-time current monitoring (±1.5% TUE) via PMBus - eliminates manual potentiometer adjustments. |
| Telecom Point-of-Load Conversion | Medical Imaging Power Supplies |
|
Use Scenario: Stepping up 12V intermediate bus to 48V for optical transceivers and RF power amplifiers in 5G base stations. IC Role / Device Role / Timing Role: PolyPhase® current-sharing controller synchronizing up to six phases to reduce EMI and thermal hotspots on dense PCBs. Use Value: Achieves 97% peak efficiency at 20A and <10mVpp output ripple - meets stringent EN55022 Class B conducted emissions limits. |
Use Scenario: Providing isolated, tightly regulated ±60V supplies for CT detector bias and ultrasound beamforming ASICs. IC Role / Device Role / Timing Role: Dual-output digital power controller with independent fault management and EEPROM-stored safety-critical startup sequences. Use Value: Supports IEC 62304 Class C compliance via logged fault history, CRC-protected configuration, and dual-channel isolation monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7882IUKG#PBF | Single-chip dual 60V boost with enhanced 18-bit ADC, faster 1MHz PMBus, and improved light-load efficiency (94% @ 100mA). | Targets next-gen telecom and medical systems requiring higher telemetry resolution and lower quiescent current (IQ = 18mA vs. 26mA). | Choose for new designs needing tighter current measurement (±0.7% TUE) and faster bus communication; not drop-in due to different register map. |
| TPS546D24RSAR | 60V dual-channel buck-boost controller with PMBus, but limited to 36V max VOUT and no native boost-only mode. | Suitable for bidirectional 12V/48V bus architectures, but lacks dedicated high-voltage boost topology and PolyPhase® current sharing. | Consider only if topology flexibility (buck/boost/SEPIC) outweighs need for pure high-voltage boost performance and ±0.5% accuracy. |
Compared with LTC7880IUKG#PBF, the LTC7882IUKG#PBF offers higher ADC resolution and lower IQ but requires firmware revalidation, while the TPS546D24RSAR supports buck-boost operation at lower VOUT range and reduced accuracy - making LTC7880IUKG#PBF optimal for fixed-ratio, high-accuracy 60V boost applications.
Availability
LTC7880IUKG#PBF is available at Aetrix Electronics and suitable for automotive start-stop systems, industrial high-voltage bias rails, telecom point-of-load conversion, and medical imaging power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC7880IUKG#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC7880IUKG#PBF belongs to ADI's Power by Linear™ digital power controller family, designed specifically for high-reliability, software-configurable DC/DC conversion in harsh environments where precision, telemetry, and fault resilience are mandatory.
FAQ
What is the maximum output voltage supported by the LTC7880IUKG#PBF?
The LTC7880IUKG#PBF supports up to 60V on Channel 0 (VOUT0) and up to 30V on Channel 1 (VOUT1), as defined by its two independent voltage ranges. This is confirmed in the Electrical Characteristics table (VOUTR0 MAX = 60V, VOUTR1 MAX = 30V) and Absolute Maximum Ratings (BOOST0/BOOST1 up to 76V). Operation beyond these values risks damage or specification violation.
Does the LTC7880IUKG#PBF support pre-biased output startup?
Yes, the LTC7880IUKG#PBF supports controlled startup into a pre-biased output, as verified in the Typical Application section and Operation chapter (page 18). Its soft-start circuitry actively manages gate drive during initial ramp, preventing reverse current flow and ensuring monotonic voltage rise - critical for powering live downstream circuits.
How does the LTC7880IUKG#PBF handle fault conditions like overvoltage or overtemperature?
The LTC7880IUKG#PBF features per-channel open-drain FAULT0/FAULT1 outputs with configurable response (latch-off or retry), plus internal EEPROM fault logging. Overvoltage faults trigger within 35µs (tPROPOV1), and overtemperature faults activate internal shutdown above 150°C (TJ), with hysteresis. All fault events are timestamped and stored in nonvolatile memory for post-event analysis.
Can the LTC7880IUKG#PBF operate with only one output enabled?
Yes, the LTC7880IUKG#PBF allows independent enable/disable of each channel via RUN0 and RUN1 pins or PMBus commands (ON_OFF_CONFIG). When one channel is disabled, the other continues full operation with unchanged loop compensation, telemetry, and fault reporting - enabling flexible power sequencing in multi-rail systems.
What is the purpose of the RCONFIG pins on the LTC7880IUKG#PBF?
The RCONFIG pins (ASEL0, ASEL1, VOUT0_CFG, VOUT1_CFG, FREQ_CFG, PHAS_CFG) provide resistor-based configuration for device address, output voltage, switching frequency, and phase count - allowing hardware-defined defaults that persist without PMBus communication. These pins set factory-programmed values used during power-up before digital interface initialization.
LTC7880IUKG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 5V ~ 40V
- Frequency - Switching:
- 50kHz ~ 500kHz
- Duty Cycle (Max):
- 92%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Current Limit, Enable, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-QFN (7x8)
LTC7880IUKG#PBF FAQ
1.How can I place an order for LTC7880IUKG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7880IUKG#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 LTC7880IUKG#PBF reliable?
The price and inventory of LTC7880IUKG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7880IUKG#PBF is usually 5 days.
3.What payment methods are accepted for LTC7880IUKG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7880IUKG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7880IUKG#PBF?
LTC7880IUKG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7880IUKG#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 LTC7880IUKG#PBF?
For technical support, including LTC7880IUKG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7880IUKG#PBF requirements.
6.How does Aetrix verify that LTC7880IUKG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC7880IUKG#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 LTC7880IUKG#PBF meets industry standards.
7.What is the process for return or replacement of LTC7880IUKG#PBF?
All LTC7880IUKG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7880IUKG#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 LTC7880IUKG#PBF part is unused and in its original packaging.
Return procedure for LTC7880IUKG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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