My Inquiry
My Account
Analog Devices Inc. LT3510EFE#TRPBF
- Part No.:
- LT3510EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3510EFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A DL 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3510EFE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic dual-channel current-mode PWM step-down DC/DC converter with two internal 2.5A NPN switches, designed for precision tracking/sequencing power supplies in DSP, disc drives, and PCI cards. It supports independent input supplies (3.1V–25V), 250kHz–1.5MHz adjustable/synchronizable switching frequency, 180° antiphase operation, and delivers up to 2A per channel with 95% max duty cycle for low-dropout operation.
For engineers reviewing the LT3510EFE#TRPBF datasheet, LT3510EFE#TRPBF pinout, LT3510EFE#TRPBF application, or LT3510EFE#TRPBF equivalent, key selection considerations include dual-channel tracking capability, independent soft-start and power-good signaling, BST capacitor-driven high-side NPN drive, thermal performance in the 20-lead TSSOP with exposed pad, and robust short-circuit protection with current-sense-based overload recovery.
Technical Context
The LT3510EFE#TRPBF implements two identical current-mode buck regulators sharing shutdown control, internal reference (0.8V FB), RT/SYNC oscillator (resistor- or clock-synchronized), and undervoltage lockout, while maintaining independent VIN1/VIN2 inputs, feedback (FB1/FB2), soft-start (SS/TRACK1/2), and power-good (PG1/PG2) pins. Each channel uses an internal 2.5A NPN switch with BST-driven base bias and integrated current-sense resistor on IND/VOUT pins.
Antiphase 180° switching reduces input/output ripple and EMI; dropout is enhanced by allowing multi-cycle on-time when BST voltage remains sufficient, enabling ~95% duty cycle. The VC pin serves as error amplifier output and peak-current comparator input, supporting loop compensation, current clamping, and overload-induced regulation-point reduction via SS pin discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A per channel - supports dual 2A loads such as 3.3V/1.8V DSP core/memory rails without external MOSFETs. |
| Input Voltage Range | 3.1V to 25V - enables direct regulation from wide-input sources including wall adapters, distributed 12V/24V buses, and battery-backed systems. |
| Switching Frequency | 250kHz to 1.5MHz - programmable via RT/SYNC resistor or external clock; allows optimization of efficiency vs. inductor/capacitor size. |
| Feedback Reference | 0.8V ±2% over –40°C to 125°C - precise setpoint for stable output regulation across temperature and load. |
| Duty Cycle Max | ~95% - enables ultra-low dropout operation (e.g., 3.3V out from 3.6V in), critical for post-regulation in tight-vin scenarios. |
| Shutdown Current | 9μA typical from VIN1 - ensures minimal system standby power in always-on applications like modems or embedded controllers. |
| Thermal Range | –40°C to 125°C junction - qualified for industrial and automotive under-hood environments with exposed-pad TSSOP package. |
Pinout & Package
LT3510EFE#TRPBF is housed in a 20-lead plastic TSSOP package with exposed leadframe (Pin 21 = GND), offering low θJA = 45°C/W and θJC = 10°C/W for high-power-density designs. The exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (1) | Channel 1 input supply & control bias source | Powers both channels' internal circuitry and connects to collector of Ch1 NPN switch; requires local high-dI/dt decoupling. |
| SW1 (2) | Channel 1 switch emitter node | Drives external Schottky catch diode; swings below ground during off-time - demands tight layout to minimize ringing. |
| IND1 (3) | Channel 1 inductor current sense input | Connects to inductor side of internal sense resistor; bias current flows out if voltage <1.6V - used for current limiting. |
| VOUT1 (4) | Channel 1 output current sense return | Completes current-sense path; bias current flows out if voltage <1.6V - works with IND1 to enable cycle-by-cycle current mode control. |
| PG1 (5) | Channel 1 power-good open-collector output | Sinks current when FB1 falls below 90% of 0.8V; hysteresis = 30mV - enables sequencing and fault monitoring. |
| PG2 (6) | Channel 2 power-good open-collector output | Independent PG signal for Ch2; can be tied to PG1 for combined status or left floating for discrete monitoring. |
| VOUT2 (7) | Channel 2 output current sense return | Matches VOUT1 function for Ch2; enables independent current-mode regulation and overload detection per channel. |
| IND2 (8) | Channel 2 inductor current sense input | Matches IND1 function for Ch2; supports independent current limit setting and antiphase timing coordination. |
| SW2 (9) | Channel 2 switch emitter node | Matches SW1 for Ch2; 180° antiphase with SW1 reduces input ripple and eases input capacitor sizing. |
| VIN2 (10) | Channel 2 input supply collector | Independent input for Ch2 - may tie to VIN1 or use separate rail; also requires local decoupling due to high dI/dt. |
| BST1 (20) | Channel 1 bootstrap capacitor connection | Provides >VIN base drive to Ch1 NPN; comparator forces minimum off-time if BST1 drops too low - enables 95% duty cycle. |
| SS/TRACK1 (19) | Channel 1 soft-start and tracking control | Capacitor-to-ground sets ramp rate; also accepts external voltage for ratiometric/absolute tracking with Ch2 output. |
| VC1 (18) | Channel 1 error amplifier output & current clamp | Drives peak-current comparator; clamps at ~2.1V to limit max switch current - used for loop compensation and overload response. |
| FB1 (17) | Channel 1 feedback input | Regulated to 0.8V ±2%; connects to resistor divider from VOUT1 - determines output voltage with <1% resistor tolerance. |
| RT/SYNC (16) | Frequency programming & external clock input | Internal 0.975V reference; resistor sets 250kHz–1.5MHz; rising-edge sync preserves 180° phase relationship. |
| SHDN (15) | Global shutdown control | 1.28V threshold; pulls both channels into 9μA shutdown - usable as UVLO with hysteresis for input supervision. |
| FB2 (14) | Channel 2 feedback input | Identical to FB1; enables independent output programming (e.g., 3.3V + 1.8V) or tracking configurations. |
| VC2 (13) | Channel 2 error amplifier output & current clamp | Matches VC1 function; supports independent loop compensation and coordinated overload behavior with VC1. |
| SS/TRACK2 (12) | Channel 2 soft-start and tracking control | Enables independent ramp or tracking to Ch1; supports sequential, ratiometric, or absolute tracking topologies. |
| BST2 (11) | Channel 2 bootstrap capacitor connection | Matches BST1 for Ch2; ensures saturated NPN operation and maintains antiphase timing under dropout conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Independent tracking/sequencing | Each channel has dedicated SS/TRACK and PG pins - enables precise power-up/down sequencing, ratiometric scaling (e.g., 2×VOUT2 = VOUT1), or absolute voltage matching without external op-amps. |
| Antiphase 180° switching | Reduces input ripple current by ~70% vs. in-phase operation - cuts required input capacitance and lowers EMI filter component count and cost. |
| Enhanced dropout operation | Supports ~95% duty cycle via BST-driven NPN saturation and dynamic off-time forcing - sustains regulation with VIN as low as VOUT + 0.2V in light-load cases. |
| Integrated current-mode control | Eliminates need for external current-sense resistors or amplifiers - IND/VOUT pins provide direct access to internal 0.1Ω sense element for accurate cycle-by-cycle limiting. |
| Robust short-circuit protection | Combines current-sense latch reset, VC clamping, and SS discharge - recovers automatically after fault removal without requiring full restart or external reset logic. |
Applications
| DSP Power Supplies | Disc Drives |
|---|---|
|
Use Scenario: Dual-rail power for digital signal processors requiring tightly tracked 3.3V I/O and 1.8V core supplies with controlled ramp rates. IC Role / Device Role / Timing Role: Primary dual-output buck regulator providing independent soft-start, antiphase switching, and power-good signaling for safe processor initialization. Use Value: Eliminates discrete sequencing ICs and external tracking components; 180° phase reduces input ripple by >50%, lowering bulk capacitor requirements by 30%. |
Use Scenario: Compact, efficient power for 2.5″/3.5″ HDD spindle motor drivers and servo controllers operating from 12V bus. IC Role / Device Role / Timing Role: Dual-channel regulator delivering 5V analog and 3.3V digital rails with independent enable and fault reporting per rail. Use Value: Independent VIN1/VIN2 inputs allow separation of noisy motor supply from clean logic supply; PG outputs feed drive controller for real-time rail health monitoring. |
| DSL/Cable Modems | PCI Cards |
|
Use Scenario: Space-constrained broadband gateway powering PHY, MAC, and memory with strict thermal limits and low standby power. IC Role / Device Role / Timing Role: High-efficiency dual buck managing 3.3V and 1.2V rails; SHDN pin enables deep-sleep mode with 9μA quiescent current. Use Value: 20-lead TSSOP with exposed pad achieves 45°C/W thermal resistance - sustains 2A/channel at 60°C ambient without heatsink; supports 1.5MHz operation for miniaturized magnetics. |
Use Scenario: Add-in card requiring isolated, sequenced 5V and 3.3V from host PCIe slot with no modifications to upstream power delivery. IC Role / Device Role / Timing Role: Standalone dual regulator with independent tracking pins enabling compliance with PCIe power sequencing specifications (e.g., VIO before VCore). Use Value: Ratiometric tracking (SS1 driven by VOUT2) ensures VOUT1 = 2×VOUT2 - satisfies legacy PCI 5V/3.3V ratio requirements without external dividers or op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3776EUF#PBF | MOSFET driver (external FETs); supports up to 20A/channel; no integrated switches; requires external gate drivers and current sensing. | Better suited for high-current (>3A), high-efficiency (>95%) applications where thermal management and layout flexibility outweigh BOM simplicity. | Select LTC3776EUF#PBF only when output current exceeds 2.5A or when custom inductor/switch selection is required for efficiency or thermal optimization. |
| TPS54290PWPR | Single-channel 2A synchronous buck; no tracking/sequencing pins; fixed 500kHz frequency; lower IQ (15μA) but no antiphase or independent PG outputs. | Applicable only for non-tracking single-rail designs; lacks dual-channel coordination needed for DSP or modem core/I/O sequencing. | Choose TPS54290PWPR only for cost-sensitive, single-output applications where dual-channel functionality and tracking are unnecessary. |
Compared with LTC3776EUF#PBF and TPS54290PWPR, the LT3510EFE#TRPBF uniquely integrates dual 2.5A NPN switches, independent tracking/soft-start pins, antiphase timing, and power-good outputs in a single 20-lead TSSOP - reducing solution size by >40% versus discrete or single-channel alternatives while preserving full sequencing control.
Availability
LT3510EFE#TRPBF is available at Aetrix Electronics and suitable for DSP power supplies, disc drives, and PCI cards requiring stable component supply, long-term industrial temperature support (–40°C to 125°C), and RoHS-compliant tape-and-reel packaging.
Supply support for LT3510EFE#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 maintains its high-performance power management portfolio, emphasizing precision, reliability, and ruggedness for industrial, communications, and automotive applications.
The LT3510EFE#TRPBF belongs to Linear's monolithic DC/DC converter product line, engineered specifically for compact, high-density dual-rail power systems demanding accurate tracking, low dropout, and robust fault handling without external complexity.
FAQ
What is the maximum continuous output current per channel for the LT3510EFE#TRPBF?
The LT3510EFE#TRPBF supports up to 2A continuous output current per channel under typical thermal conditions (TJ ≤ 125°C) with proper PCB copper area on the exposed pad. Its internal 2.5A NPN switches provide margin for transient peaks, but sustained 2A operation requires adequate heatsinking via the exposed GND pad soldered to ≥2 cm² of 2-oz copper.
Can the LT3510EFE#TRPBF operate with only one channel enabled?
Yes, the LT3510EFE#TRPBF supports independent channel disable via each SS/TRACK pin: pulling SS/TRACK1 or SS/TRACK2 low disables its respective channel while the other remains active. The global SHDN pin disables both channels simultaneously. This enables flexible power partitioning in systems with variable load requirements.
What is the purpose of the BST1 and BST2 pins on the LT3510EFE#TRPBF?
The BST1 and BST2 pins on the LT3510EFE#TRPBF connect to external bootstrap capacitors that generate a voltage higher than VIN to fully saturate the internal NPN power switches. This ensures low VCE(sat) (~400mV at 2A), enabling high efficiency and ~95% maximum duty cycle for low-dropout operation.
How does the LT3510EFE#TRPBF achieve antiphase switching between channels?
The LT3510EFE#TRPBF generates two internal clock signals 180° out of phase using a single oscillator with phase-splitting logic. This timing is preserved whether operating in resistor-programmed mode (RT/SYNC pin) or external synchronization mode - ensuring consistent ripple cancellation and EMI reduction across all operating frequencies.
Is the LT3510EFE#TRPBF pin-compatible with other members of the LT35xx family?
No, the LT3510EFE#TRPBF is not pin-compatible with other LT35xx devices such as LT3511 or LT3512. Its 20-pin TSSOP layout, dual independent tracking pins (SS/TRACK1/2), and specific pin assignments (e.g., PG1/PG2 adjacent, VIN1/VIN2 separation) are unique to the LT3510. Substitution requires full schematic and layout review.
LT3510EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 23.75V
- Current - Output:
- 2A
- Frequency - Switching:
- 250kHz ~ 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LT3510EFE#TRPBF FAQ
1.How can I place an order for LT3510EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3510EFE#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 LT3510EFE#TRPBF reliable?
The price and inventory of LT3510EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3510EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3510EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3510EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3510EFE#TRPBF?
LT3510EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3510EFE#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 LT3510EFE#TRPBF?
For technical support, including LT3510EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3510EFE#TRPBF requirements.
6.How does Aetrix verify that LT3510EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3510EFE#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 LT3510EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3510EFE#TRPBF?
All LT3510EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3510EFE#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 LT3510EFE#TRPBF part is unused and in its original packaging.
Return procedure for LT3510EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3510EFE#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
