My Inquiry
My Account
Analog Devices Inc. LTC7813EUH#TRPBF
- Part No.:
- LTC7813EUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC7813EUH#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK/BOOST
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7813EUH#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel synchronous Boost+Buck DC/DC controller driving all-N-channel MOSFET stages. It integrates independent 60V boost and buck controllers, supports input ranges from 4.5V to 60V (or 2.2V post-startup), delivers 34µA quiescent current with both channels active, and enables VIN-above/below/equal-to-VOUT regulation - ideal for automotive cold-crank power systems and high-power battery-operated equipment.
For engineers reviewing the LTC7813EUH#TRPBF datasheet, LTC7813EUH#TRPBF pinout, LTC7813EUH#TRPBF application, or LTC7813EUH#TRPBF equivalent, key selection criteria include cascaded topology support, OPTI-DRIVE gate voltage programmability (5–10V), phase-lockable 75–850kHz switching frequency, RSENSE/DCR current sensing, and operation across –40°C to 125°C junction temperature.
Technical Context
The LTC7813EUH#TRPBF implements a non-inverting cascaded architecture: the boost stage feeds the buck stage, enabling continuous input/output currents and low EMI. Its two independent control loops feature separate feedback (VFB1/VFB2) and compensation (ITH1/ITH2) nodes, allowing per-channel transient optimization without cross-coupling.
It uses internal floating gate drivers (TG1/TG2/BG1/BG2) with programmable DRVCC (5–10V), supports lossless DCR or discrete RSENSE sensing, and includes integrated UVLO (4.2V/7.8V thresholds), soft-start (TRACK/SS1, SS2), and PGOOD1 monitoring - all in a thermally enhanced 32-pin 5mm × 5mm QFN package with exposed GND pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V main bias; operates down to 2.2V after startup when biased from boost output - enables cold-crank survival in automotive 12V systems. |
| Buck Output Range | 0.8V to 60V regulated output - supports wide-range industrial and telecom rails including 3.3V, 5V, 12V, 24V, and 48V. |
| Boost Output Range | Up to 60V - suitable for LED backlights, PoE midspans, and isolated bias generation. |
| Quiescent Current | 34µA with both channels active - extends runtime in always-on battery-powered applications like telematics and remote sensors. |
| Switching Frequency | 75kHz to 850kHz, phase-lockable via PLLIN/MODE - allows EMI reduction through synchronization and layout-optimized frequency selection. |
| Gate Drive Voltage | Programmable 5V to 10V (OPTI-DRIVE) via DRVSET - optimizes RDS(on) vs. switching loss trade-off for diverse MOSFETs. |
| Current Sensing | RSENSE or lossless DCR sensing with three selectable max thresholds (43/75/90mV) via ILIM pin - enables accurate overcurrent protection across load conditions. |
Pinout & Package
Package: 32-lead 5mm × 5mm plastic QFN (UH), exposed thermal pad (Pin 33) soldered to PCB ground for optimal thermal performance (θJA = 44°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1, SW2 (1, 30) | Switch node connections | Direct connection points to buck and boost inductor switches - require low-inductance layout and local ceramic decoupling. |
| TG1, TG2 (2, 29) | Top-gate drivers | Floating N-channel gate drives referenced to SW nodes - supply gate voltage swing of DRVCC above SW voltage. |
| BG1, BG2 (31, 27) | Bottom-gate drivers | Ground-referenced N-channel gate drives - swing from GND to DRVCC; enable synchronous rectification. |
| VFB1, VFB2 (6, 19) | Buck/boost feedback inputs | High-impedance inputs (±50nA/±7µA) for resistive divider sensing - set regulated output voltages (0.8V/1.2V references). |
| ITH1, ITH2 (5, 20) | Error amplifier outputs | Compensation nodes for per-channel loop stability - connect RC networks to tailor bandwidth and phase margin. |
| SENSE1+, SENSE1– (7, 8) SENSE2+, SENSE2– (12, 13) | Differential current sense inputs | Measure MOSFET current via RSENSE or inductor DCR - define overcurrent trip point with precision offset control. |
| RUN1, RUN2 (16, 17) | Channel enable inputs | Logic-level controls (1.22–1.33V threshold) - allow independent startup sequencing or fault-induced shutdown. |
| PGOOD1 (14) | Power-good indicator | Open-drain output asserting when VFB1 deviates >±10% - used for system power sequencing and fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded Boost+Buck topology | Enables single-chip regulation where input may be above, below, or equal to output - eliminates need for separate buck-boost ICs or complex discrete solutions. |
| Independent loop compensation | Separate ITH1/ITH2 pins allow individual tuning of buck and boost transient response - critical for multi-rail systems with differing load dynamics. |
| OPTI-DRIVE gate voltage control | DRVSET pin adjusts DRVCC from 5V to 10V - balances conduction loss (lower RDS(on)) against gate charge loss and shoot-through risk. |
| No external bootstrap diodes required | Integrated bootstrapping circuitry on BOOST1/BOOST2 pins reduces BOM count and improves reliability versus discrete diode-based solutions. |
| Phase-lockable oscillator | PLLIN/MODE pin accepts external clock (75–850kHz) - synchronizes switching to system clock tree to suppress beat frequencies and simplify EMI filtering. |
Applications
| Automotive Infotainment Power Supply | Industrial Programmable Logic Controller (PLC) I/O Module |
|---|---|
Use Scenario: Powering 5V microcontroller, 3.3V FPGA, and 12V CAN transceiver from a 12V battery subject to cold-crank dips to 2.2V. IC Role / Device Role / Timing Role: LTC7813EUH#TRPBF acts as primary dual-output regulator - boost stage maintains stable 24V intermediate rail during cranking; buck stage derives clean 5V/3.3V. Use Value: Continuous regulation through 2.2V input dips ensures uninterrupted MCU operation; low 34µA IQ extends backup battery life in sleep mode. | Use Scenario: Generating isolated 24V sensor excitation and 5V logic rail from a 48V industrial bus with strict EMI limits. IC Role / Device Role / Timing Role: LTC7813EUH#TRPBF configures as cascaded boost+buck - first stage boosts 48V to 60V, second stage bucks to precise 24V/5V outputs. Use Value: Non-pulsating input/output currents reduce conducted EMI by >15dB versus conventional buck-boost; phase-locking aligns switching to PLC master clock. |
| High-Power Portable Test Equipment | Telecom Remote Radio Unit (RRU) Bias Supply |
Use Scenario: Battery-powered oscilloscope requiring 15V analog front-end rail and –5V reference from a 24V Li-ion pack. IC Role / Device Role / Timing Role: LTC7813EUH#TRPBF operates in boost-only mode (VPRG2 = GND) to generate 15V, while external inverting charge pump derives –5V from buck output. Use Value: 60V boost capability supports full battery range (24–32V); 29µA single-channel IQ maximizes runtime between charges. | Use Scenario: Providing 28V RF PA bias and 3.3V digital core supply from a 48V telecom rectifier with tight ripple specs. IC Role / Device Role / Timing Role: LTC7813EUH#TRPBF regulates 28V via buck channel (VFB1 = 0.8V) and 3.3V via boost-buck cascade - leveraging high light-load efficiency modes. Use Value: Burst Mode® operation achieves >90% efficiency at 10mA loads; fast transient response (<50µs) handles PA burst modulation without droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-stage DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7810EUH#TRPBF | Single-channel synchronous buck controller; no boost stage; 4.5–40V input; 35µA IQ. | Suitable only for step-down-only designs; cannot regulate VIN-above-VOUT or support cold-crank below 4.5V. | Select when only buck regulation is needed and input never falls below 4.5V - lower cost and smaller footprint. |
| LTC3891EUH#TRPBF | 60V input, dual-output synchronous buck controller; no integrated boost; 50µA IQ; supports tracking and margining. | Lacks cascaded topology - requires external boost stage for VIN < VOUT; higher IQ reduces battery runtime. | Prefer for high-precision dual-buck systems where tracking accuracy and margining are critical, and boost is handled separately. |
Compared with LTC7810EUH#TRPBF and LTC3891EUH#TRPBF, the LTC7813EUH#TRPBF uniquely integrates both boost and buck controllers in one package with cold-crank capability and ultra-low IQ - making it the only choice for compact, battery-sensitive, wide-input-range applications requiring VIN-above/below/equal-to-VOUT regulation.
Availability
LTC7813EUH#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC modules, portable test equipment, and telecom RRU bias supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC7813EUH#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 and continues its legacy of high-performance power management ICs with industry-leading efficiency, integration, and reliability.
The LTC7813EUH#TRPBF belongs to the LTC78xx family of high-voltage multi-phase controllers, designed specifically for demanding automotive, industrial, and telecom power systems requiring wide input range, low quiescent current, and flexible topology configuration.
FAQ
What is the minimum input voltage the LTC7813EUH#TRPBF can operate from after startup?
The LTC7813EUH#TRPBF can operate from an input as low as 2.2V after startup when biased from the output of its integrated boost regulator. This capability is essential for automotive cold-crank scenarios where battery voltage dips below 4.5V. The device maintains regulation of both output rails during such events, provided the boost stage remains functional and adequately biased.
How does the LTC7813EUH#TRPBF achieve low EMI compared to conventional buck-boost regulators?
The LTC7813EUH#TRPBF achieves low EMI through its cascaded Boost+Buck architecture, which delivers continuous, non-pulsating input and output currents - unlike conventional four-switch buck-boost topologies that produce discontinuous current waveforms. This inherent current continuity significantly reduces voltage ripple and high-frequency harmonic content, easing EMI filter design and improving system-level compliance.
Can the LTC7813EUH#TRPBF regulate both outputs independently, or must they be cascaded?
The LTC7813EUH#TRPBF supports both configurations: its boost and buck controllers can regulate two completely independent outputs (e.g., 12V and 5V from a common 24V input), or be cascaded so the boost output feeds the buck input (enabling VIN-above/below/equal-to-VOUT). Independent operation requires separate input sources or careful sequencing, while cascading provides inherent input-output flexibility and improved efficiency in wide-range applications.
What is the function of the VPRG2 pin on the LTC7813EUH#TRPBF, and how does it affect boost output configuration?
The VPRG2 pin on the LTC7813EUH#TRPBF selects the boost channel's output configuration: grounding VPRG2 enables adjustable output via external resistors at VFB2 (regulated to 1.2V); floating VPRG2 sets fixed 10V output; tying VPRG2 to INTVCC sets fixed 12V output. This pin eliminates external resistor networks for standard boost voltages while retaining full programmability when needed.
Does the LTC7813EUH#TRPBF support synchronization to an external clock, and what is the supported frequency range?
Yes, the LTC7813EUH#TRPBF supports external clock synchronization via the PLLIN/MODE pin, accepting input frequencies from 75kHz to 850kHz. When synchronized, both boost and buck channels lock phase to the external clock's rising edge and operate in forced continuous conduction mode - enabling deterministic switching, reduced beat frequencies, and simplified EMI mitigation in multi-converter systems.
LTC7813EUH#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Number of Outputs:
- 2
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 60V
- Frequency - Switching:
- 105kHz ~ 835kHz, 350kHz ~ 535kHz
- Duty Cycle (Max):
- 96%, 99%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Power Good, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC7813EUH#TRPBF FAQ
1.How can I place an order for LTC7813EUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7813EUH#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 LTC7813EUH#TRPBF reliable?
The price and inventory of LTC7813EUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7813EUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7813EUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7813EUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7813EUH#TRPBF?
LTC7813EUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7813EUH#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 LTC7813EUH#TRPBF?
For technical support, including LTC7813EUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7813EUH#TRPBF requirements.
6.How does Aetrix verify that LTC7813EUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7813EUH#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 LTC7813EUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7813EUH#TRPBF?
All LTC7813EUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7813EUH#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 LTC7813EUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC7813EUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7813EUH#TRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
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…
