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Analog Devices Inc. LTC7813MPUH#PBF
- Part No.:
- LTC7813MPUH#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC7813MPUH#PBF.pdf
- Description:
- IC REG CTRLR BUCK/BOOST 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,021
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Product details
Overview
LTC7813MPUH#PBF from Analog Devices (formerly Linear Technology) is a high-performance, dual-channel synchronous Boost+Buck DC/DC controller driving all-N-channel MOSFET stages. It integrates independent boost and buck controllers capable of regulating two isolated outputs or cascading to support VIN above, below, or equal to VOUT - up to 60V - with 4.5V–60V bias input range, 34µA no-load quiescent current (both channels active), and operation down to 2.2V after startup. It is used in automotive cold-crank power systems requiring stable dual-rail regulation under wide input transients.
For engineers reviewing the LTC7813MPUH#PBF datasheet, LTC7813MPUH#PBF pinout, LTC7813MPUH#PBF application, or LTC7813MPUH#PBF equivalent, key selection considerations include its –55°C to 150°C extended temperature grade, OPTI-DRIVE gate drive level programming (5V–10V), phase-lockable 75kHz–850kHz switching frequency, RSENSE/DCR current sensing flexibility, and cascaded topology enabling continuous input/output current for low EMI in battery-powered and industrial power supplies.
Technical Context
The LTC7813MPUH#PBF implements a true cascaded Boost+Buck architecture: the boost stage feeds the buck stage, enabling seamless regulation across input voltages spanning 2.2V to 60V while maintaining non-pulsating input and output currents. Its dual independent control loops feature separate feedback (VFB1/VFB2), compensation (ITH1/ITH2), and soft-start (TRACK/SS1/SS2) paths, allowing per-channel transient optimization and output tracking.
It supports three light-load operating modes via PLLIN/MODE pin configuration - Burst Mode®, pulse-skipping, or forced continuous conduction - and includes programmable current limit thresholds (50mV/75mV/100mV via ILIM), adjustable DRVCC (5V–10V via DRVSET), and EXTVCC switchover for gate driver supply redundancy. The controller operates with internal 5V INTVCC and externally regulated DRVCC, both decoupled independently for noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V bias supply; operates down to 2.2V after startup when biased from boost output - enables cold-crank survival in automotive systems. |
| Quiescent Current | 34µA (both channels active, sleep mode) - extends runtime in always-on battery systems like telematics or ADAS sensors. |
| Switching Frequency | 75kHz to 850kHz, phase-lockable via PLLIN/MODE - allows EMI reduction through synchronization with system clocks. |
| Buck Output Range | 0.8V to 60V (via external resistive divider on VFB1) - supports wide-range core logic or analog rail generation. |
| Boost Output Range | Up to 60V (VPRG2 = GND); fixed 10V/12V options (VPRG2 = FLOAT/INTVCC) - simplifies design for auxiliary rails or LED drivers. |
| Operating Temperature | –55°C to +150°C (MP grade) - qualified for under-hood automotive, aerospace, and harsh industrial environments. |
| Package | 32-pin 5mm × 5mm QFN (UH) with exposed thermal pad - provides low θJA (44°C/W) for high-power density layouts. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN (UH), exposed pad (Pin 33) soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1, SW2 (1, 30) | Switch node connections | Interface directly to inductor legs; require low-inductance layout to minimize switching losses and EMI. |
| TG1, TG2 (2, 29) | Top-gate drivers | Floating N-channel gate drives with DRVCC-referenced swing - eliminate need for external bootstrap diodes. |
| BG1, BG2 (31, 27) | Bottom-gate drivers | GND-referenced N-channel gate drives; complement TG outputs for synchronous rectification. |
| VFB1, VFB2 (6, 19) | Buck/boost feedback inputs | High-impedance inputs (±50nA/±7µA) for precision voltage regulation; support remote sensing and output tracking. |
| SENSE1+, SENSE1– (7, 8) SENSE2+, SENSE2– (12, 13) | Differential current sense inputs | Enable lossless DCR or discrete RSENSE sensing; common-mode range up to 60V (SENSE2+) supports high-side boost sensing. |
| DRVCC (24) | Gate driver supply output | Regulated LDO output (5V–10V programmable) powering all gate drivers - requires ≥4.7µF low-ESR ceramic decoupling. |
| VBIAS (26) | Main bias supply input | Primary power source for analog/digital circuitry; must be bypassed with ≥0.1µF ceramic capacitor near pin. |
| PLLIN/MODE (10) | Synchronization & light-load mode control | Accepts external clock (75kHz–850kHz) for synchronization; also selects Burst Mode®, pulse-skipping, or forced CCM. |
Key Features
| Feature | Design Value |
|---|---|
| Cascaded Boost+Buck topology | Delivers continuous, non-pulsating input and output currents - reduces EMI filter size and improves EMC compliance vs. conventional buck-boost. |
| Independent loop compensation | Separate ITH1/ITH2 pins allow per-channel loop tuning - enables fast transient response on both rails without cross-coupling. |
| OPTI-DRIVE gate drive level | DRVSET pin programs DRVCC from 5V to 10V - optimizes MOSFET RDS(on) vs. switching loss trade-off for diverse FET selections. |
| Wide-input cold-crank operation | Maintains regulation during automotive cranking dips to 2.2V - eliminates need for backup LDOs or supercapacitors in critical subsystems. |
| Three-level current limit programming | ILIM pin selects 50mV/75mV/100mV sense thresholds - simplifies overcurrent protection design across varying RSENSE or DCR values. |
| Extended temperature MP grade | –55°C to +150°C operation with full performance guarantee - meets AEC-Q100 Grade 1 requirements for under-hood deployment. |
Applications
| Automotive Cold-Crank Power Supply | Industrial Dual-Rail Bias Generator |
|---|---|
Use Scenario: Powering infotainment head units and ADAS cameras during engine start, where battery voltage dips to 2.2V for >100ms. IC Role / Device Role / Timing Role: LTC7813MPUH#PBF acts as primary cascaded regulator - boost stage maintains stable intermediate rail, buck stage delivers clean 5V/3.3V to SoC and sensors. Use Value: Eliminates need for pre-bias hold-up capacitors or secondary regulators; achieves <1% output deviation during 2.2V input dip at full load. |
Use Scenario: Generating isolated 12V and 5V rails from a 24V factory automation bus with strict EMI limits. IC Role / Device Role / Timing Role: LTC7813MPUH#PBF configures boost channel for 12V output and buck channel for 5V output, synchronized via PLLIN/MODE to avoid beat frequencies. Use Value: Continuous input current reduces conducted EMI by >15dB compared to SEPIC; dual-loop control ensures <50µs recovery from 50% load steps on either rail. |
| High-Power Battery-Operated System | Aerospace Payload Power Manager |
Use Scenario: Portable test equipment powered by 3S Li-ion (9–12.6V) requiring 15V analog front-end and 1.8V FPGA core rails. IC Role / Device Role / Timing Role: LTC7813MPUH#PBF operates in cascaded mode: boost generates 15V, buck regulates 1.8V; TRACK/SS1 enables controlled ramp-up sequence. Use Value: 34µA quiescent current extends shelf life; programmable frequency avoids sensitive RF bands; RSENSE/DCR flexibility accommodates space-constrained inductor choices. |
Use Scenario: Satellite payload subsystem needing radiation-tolerant, wide-temperature DC/DC conversion from 28V bus to 5V and 3.3V rails. IC Role / Device Role / Timing Role: LTC7813MPUH#PBF serves as primary point-of-load controller - MP-grade qualification ensures reliability at –55°C to +150°C; EXTVCC supports redundant gate drive sourcing. Use Value: No external bootstrap diodes reduce component count and failure points; independent shutdown (RUN1/RUN2) enables selective rail disable for power budgeting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous Boost+Buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7813HUH#PBF | Same architecture and pinout; rated for –40°C to +150°C (H grade) instead of –55°C to +150°C (MP grade). | Not qualified for extended low-temperature operation required in aerospace or polar instrumentation. | Select LTC7813MPUH#PBF when operation below –40°C is mandatory; H grade suffices for standard automotive under-hood use. |
| LTC7812MPUH#PBF | Single-output synchronous boost controller (no buck stage); shares same package, pinout, and MP temperature rating. | Cannot replace LTC7813MPUH#PBF in dual-rail or cascaded topologies - lacks buck control, VFB2, SENSE2, and associated pins. | Choose only if application requires only boost conversion; not a functional substitute for LTC7813MPUH#PBF's dual-channel capability. |
Compared with LTC7813HUH#PBF, the LTC7813MPUH#PBF adds guaranteed operation at –55°C - critical for cryogenic or high-altitude deployments - while retaining identical electrical performance and layout compatibility. Unlike LTC7812MPUH#PBF, it delivers true dual-output regulation, eliminating need for external buck controllers in space- or weight-constrained systems.
Availability
LTC7813MPUH#PBF is available at Aetrix Electronics and suitable for automotive cold-crank systems, industrial dual-rail power supplies, and high-reliability aerospace payloads requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC7813MPUH#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 its high-performance power management portfolio with rigorous automotive and industrial qualification standards.
The LTC7813MPUH#PBF belongs to Linear's high-voltage synchronous controller family, designed specifically for demanding applications requiring wide VIN, ultra-low IQ, and robust operation across extreme temperatures - especially automotive, aerospace, and industrial power systems.
FAQ
What is the minimum input voltage the LTC7813MPUH#PBF can regulate from after startup?
The LTC7813MPUH#PBF can maintain regulation with input voltage as low as 2.2V after startup when biased from the boost output rail. This capability is enabled by its internal charge pump and low-quiescent-current design, making it ideal for automotive cold-crank scenarios where battery voltage collapses temporarily. Below 2.2V, the device shuts down unless reinitialized via RUN pins.
How does the LTC7813MPUH#PBF achieve low EMI compared to conventional buck-boost converters?
The LTC7813MPUH#PBF uses a cascaded Boost+Buck topology that delivers continuous, non-pulsating input and output currents - unlike single-stage buck-boost or SEPIC converters that produce discontinuous current waveforms. This inherent current continuity significantly reduces high-frequency harmonics and conducted EMI, easing compliance with CISPR 25 Class 5 and EN 55022 standards without oversized filters.
Can the LTC7813MPUH#PBF operate with only the buck or only the boost channel enabled?
Yes, the LTC7813MPUH#PBF supports independent channel operation: pulling RUN1 low disables only the buck channel while RUN2 remains active, and vice versa. Both channels can be disabled simultaneously by pulling RUN1 and RUN2 below 0.7V, reducing quiescent current to ~3.6µA. This flexibility enables staged power-up, fault isolation, and dynamic rail management in complex systems.
What is the purpose of the VPRG2 pin on the LTC7813MPUH#PBF?
The VPRG2 pin on the LTC7813MPUH#PBF selects the boost channel's output configuration: grounding VPRG2 enables adjustable output (0.8V–60V) via external resistors on VFB2; floating VPRG2 sets a fixed 10V output; tying VPRG2 to INTVCC sets a fixed 12V output. This eliminates external resistor networks for common auxiliary rails while preserving flexibility for custom voltages.
Does the LTC7813MPUH#PBF require external bootstrap diodes for high-side gate drive?
No, the LTC7813MPUH#PBF integrates internal charge pumps for BOOST1 and BOOST2, eliminating the need for external bootstrap diodes. Its TG1/TG2 drivers are floating N-channel gate drivers referenced to SW1/SW2, with voltage swing equal to DRVCC superimposed on the switch node - simplifying layout, improving reliability, and reducing BOM count in high-density designs.
LTC7813MPUH#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC7813MPUH#PBF FAQ
1.How can I place an order for LTC7813MPUH#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7813MPUH#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 LTC7813MPUH#PBF reliable?
The price and inventory of LTC7813MPUH#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7813MPUH#PBF is usually 5 days.
3.What payment methods are accepted for LTC7813MPUH#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7813MPUH#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7813MPUH#PBF?
LTC7813MPUH#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7813MPUH#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 LTC7813MPUH#PBF?
For technical support, including LTC7813MPUH#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7813MPUH#PBF requirements.
6.How does Aetrix verify that LTC7813MPUH#PBF is sourced from the original manufacturer or authorized distributors?
All LTC7813MPUH#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 LTC7813MPUH#PBF meets industry standards.
7.What is the process for return or replacement of LTC7813MPUH#PBF?
All LTC7813MPUH#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7813MPUH#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 LTC7813MPUH#PBF part is unused and in its original packaging.
Return procedure for LTC7813MPUH#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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