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Analog Devices Inc. LTC2926IGN#TRPBF
- Part No.:
- LTC2926IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2926IGN#TRPBF.pdf
- Description:
- IC PWR SUPPLY CONTROLLER 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,214
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Product details
Overview
LTC2926IGN#TRPBF from Analog Devices (formerly Linear Technology) is a precision MOSFET-controlled power supply tracker IC designed to coordinate ramp-up/ramp-down sequencing of up to three voltage rails. It delivers ±3% tracking error, 0.8V internal reference, adjustable ramp rates via external capacitor, and integrated remote sense switching - enabling robust VCORE/VI/O tracking in FPGA and microprocessor power systems.
For engineers reviewing the LTC2926IGN#TRPBF datasheet, LTC2926IGN#TRPBF pinout, LTC2926IGN#TRPBF application, or LTC2926IGN#TRPBF equivalent, key selection considerations include its 20-lead SSOP package, –40°C to 85°C industrial temperature grade, dual slave gate drivers (SGATE1/SGATE2), RSGATE-controlled remote sense switches, and fault-latched STATUS/PGI signaling with programmable PGTMR timeout.
Technical Context
The LTC2926IGN#TRPBF implements a servo-based tracking architecture: each TRACK pin (TRACK1/TRACK2) is held at 0.800V ±24mV, and its sourced current is mirrored to the corresponding FB pin to regulate slave supply output via external N-channel MOSFET source followers. The master ramp is generated either by MGATE-driven external MOSFET or by tying MGATE to RAMP with an RC network.
It integrates dual charge pumps - one for MGATE/SGATE/RSGATE (guaranteeing ≥5.0V gate drive above VCC) and another for STATUS/PGI/FAULT - enabling full enhancement of logic-level MOSFETs across 2.9V–5.5V VCC. Fault handling includes latchable FAULT input, PGTMR timeout-triggered disconnect, and coordinated shutdown of MGATE, SGATE1, SGATE2, and RSGATE within microseconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 2.9V to 5.5V - supports standard 3.3V and 5V bias rails; UVLO at 2.4V prevents erratic startup. |
| Tracking Accuracy | ±3% current mismatch (IFBn–ITRACKn)/ITRACKn - ensures tight voltage coordination between master and slave rails during transients. |
| Internal Reference | 0.800V ±16mV at FB pins - stable reference for resistive divider-based tracking offset and ratio configuration. |
| Gate Drive Capability | ≥5.0V above VCC on MGATE/SGATE/RSGATE - fully enhances logic-level N-MOSFETs without external level shifters. |
| Operating Temperature | –40°C to +85°C (I-grade) - qualified for industrial embedded and communications equipment environments. |
| Package | 20-lead narrow SSOP (GN) - 0.65mm pitch, exposed pad optional; compatible with standard reflow profiles. |
| Input Supply Current | 1.5–3.5mA (quiescent); 8.5–10.5mA (active tracking) - low power consumption during multi-rail coordination. |
Pinout & Package
Package: 20-lead narrow SSOP (GN), 0.65mm pitch, body size 7.5mm × 5.6mm. Exposed pad not electrically connected; may be left floating or tied to GND for thermal relief.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Power source for internal circuitry and charge pumps; requires 0.1µF bypass to GND. |
| TRACK1 (Pin 2) | Slave 1 tracking control input | Servo node held at 0.800V; current sourced here sets FB1 regulation point for SLAVE1 rail. |
| FB1 (Pin 3) | Slave 1 feedback input/output | Mirrors TRACK1 current; connects to slave supply's feedback node to control output voltage. |
| S1 (Pin 4) | Slave 1 remote sense switch source | Paired with D1; forms low-RON (≤10Ω) switch to enable remote sensing compensation for Q1 voltage drop. |
| SGATE1 (Pin 5) | Slave 1 MOSFET gate driver | Drives gate of external N-MOSFET (Q1); charge-pump boosted to ≥VCC+5.0V for full enhancement. |
| D1 (Pin 6) | Slave 1 remote sense switch drain | Paired with S1; connects to slave load side to close remote sense path when RSGATE is high. |
| ON (Pin 7) | Enable/control input | 1.23V threshold with 75mV hysteresis; controls ramp direction (up/down) and arms/disarms fault latch. |
| PGTMR (Pin 8) | Power good timer input | Capacitor-connected node; 10µA charge current sets timeout delay before PGI assertion or fault trigger. |
| FAULT (Pin 9) | Fault input/output | Negative-logic open-drain; pulled up to ~VCC–0.7V; latches low on sub-0.5V input, forcing full system disconnect. |
| GND (Pin 10) | Ground reference | Analog/digital common return; must be low-impedance connection for tracking accuracy and noise immunity. |
| RAMPBUF (Pin 20) | Buffered master ramp output | Low-impedance replica of RAMP signal; drives TRACK resistor dividers without loading MGATE/RAMP node. |
Key Features
| Feature | Design Value |
|---|---|
| Three-rail tracking & sequencing | Coordinates master ramp + two slave supplies (SLAVE1/SLAVE2) with independent offset, ratio, or delay configuration. |
| Integrated remote sense switching | On-chip 10Ω D1/S1 and D2/S2 switches automatically engage after MOSFET enhancement to compensate for FET RDS(on) drop. |
| Charge-pump gate drivers | MGATE, SGATE1, SGATE2, RSGATE, and STATUS/PGI all deliver ≥5.0V overdrive above VCC - eliminates need for external boosters. |
| Fault-latched protection | Single-event FAULT or PGTMR timeout pulls MGATE/SGATE1/SGATE2/RSGATE/STATUS/PGI low and opens sense switches - prevents partial power-up. |
| Adjustable ramp control | Ramp rate set by single capacitor on MGATE (or MGATE–RAMP tie point); enables precise timing alignment across rails. |
Applications
| VCORE/VI/O Tracking for FPGAs | Multi-Rail Sequencing in Servers |
|---|---|
|
Use Scenario: Coordinating 1.8V core and 3.3V I/O supplies for Xilinx Kintex-7 FPGA to prevent latch-up during power-up/down. IC Role / Device Role / Timing Role: LTC2926IGN#TRPBF acts as master-slave coordinator, using TRACK1/FB1 for VI/O and TRACK2/FB2 for VCORE, enforcing ≤100mV inter-rail differential. Use Value: Eliminates need for discrete timers or µC-based sequencing; achieves ±3% tracking accuracy without calibration. |
Use Scenario: Ensuring 12V auxiliary, 5V management, and 3.3V logic rails power up in strict order within telecom server backplane. IC Role / Device Role / Timing Role: LTC2926IGN#TRPBF configures SLAVE1 (5V) and SLAVE2 (3.3V) to track delayed master ramp derived from 12V via external MOSFET and RC timing. Use Value: Replaces three independent sequencers with single IC; PGTMR timeout guarantees power-good assertion only after all rails stabilize. |
| Industrial PLC Power Management | Communications Baseband Module |
|
Use Scenario: Managing isolated 24V-to-5V and 24V-to-3.3V DC/DC outputs in programmable logic controller with wide ambient temperature range. IC Role / Device Role / Timing Role: LTC2926IGN#TRPBF operates across –40°C to +85°C, using RSGATE to enable remote sense on both slaves, compensating for PCB trace IR drop. Use Value: Maintains <150mV tracking error over full temp range; fault latch prevents brownout-induced firmware corruption. |
Use Scenario: Synchronizing 1.2V DSP core, 1.8V memory interface, and 2.5V RF front-end supplies in LTE baseband unit. IC Role / Device Role / Timing Role: LTC2926IGN#TRPBF uses ratiometric tracking (RTA/RTB dividers) to scale slave rails proportionally to master, meeting JEDEC JESD78 latch-up immunity. Use Value: Achieves <5ms inter-rail skew; STATUS/PGI output directly interfaces with baseband processor's power management controller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply tracking applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2925IGN#TRPBF | Two-channel tracker only (no TRACK2/SGATE2/FB2/D2/S2); identical pinout and feature set otherwise. | Suitable only for dual-rail systems; lacks third slave channel required for triple-supply coordination. | Select when only two rails require tracking - reduces BOM count and layout area vs. LTC2926IGN#TRPBF. |
| TPS652860RHAR | Integrated buck controllers + sequencer (not external MOSFET-based); fixed 0.6V ref; no remote sense switching. | Targets compact PMIC designs where integration > flexibility; cannot replicate LTC2926's MOSFET-based voltage offset or ratiometric modes. | Choose for space-constrained apps needing monolithic solution; avoid when external FET control or precision offset tracking is required. |
Compared with LTC2925IGN#TRPBF and TPS652860RHAR, the LTC2926IGN#TRPBF uniquely supports three-rail tracking with configurable offsets, integrated remote sense switching, and charge-pump gate drives - making it optimal for high-precision, field-upgradeable multi-rail systems where external MOSFETs provide voltage headroom and thermal scalability.
Availability
LTC2926IGN#TRPBF is available at Aetrix Electronics and suitable for FPGA power management, server rail sequencing, industrial PLCs, and communications baseband modules requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC2926IGN#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and aerospace markets.
The LTC2926IGN#TRPBF belongs to ADI's Linear Technology legacy power management portfolio, engineered specifically for precision analog-controlled power sequencing in complex digital systems where reliability, tracking fidelity, and fault resilience are critical.
FAQ
What is the operating temperature range for the LTC2926IGN#TRPBF?
The LTC2926IGN#TRPBF is rated for –40°C to +85°C (industrial grade), validated per the LTC2926I specification. Its electrical characteristics - including 0.800V reference voltage, ±3% tracking accuracy, and MGATE/SGATE gate drive strength - are guaranteed across this full range, making it suitable for deployment in harsh-environment industrial and telecom equipment where thermal stability is essential.
How does the LTC2926IGN#TRPBF implement remote sense switching?
The LTC2926IGN#TRPBF integrates two 10Ω (max) bidirectional switches (D1/S1 and D2/S2) controlled by the RSGATE pin. When RSGATE rises above VCC + 4.9V, these switches close to connect the slave supply's load-side sense point to its feedback node - compensating for voltage drop across the external series MOSFET. This occurs automatically after MGATE, SGATE1, and SGATE2 reach full enhancement, ensuring accurate regulation without manual intervention.
Can the LTC2926IGN#TRPBF track supplies with different voltage offsets?
Yes - the LTC2926IGN#TRPBF supports fixed voltage offsets via resistor networks on TRACK1/2. By configuring RTA and RTB values per the tracking cell equation (VOUT = VREF × (1 + RTA/RTB)), users can set precise offsets (e.g., 3.3V SLAVE2 tracking 1.8V SLAVE1 with +1.5V offset). This capability is explicitly verified in the LTC2926 datasheet Figure TA01b and confirmed across temperature for the IGN grade.
What happens to the LTC2926IGN#TRPBF during a fault condition?
Upon fault detection - whether via low FAULT pin voltage (<0.5V), PGTMR timeout, or low STATUS/PGI - the LTC2926IGN#TRPBF immediately latches, pulling MGATE, SGATE1, SGATE2, and RSGATE to GND with 20mA drive strength, opening D1/S1 and D2/S2 switches, and forcing STATUS/PGI low. The latch remains until ON falls below 0.5V or VCC drops below UVLO - ensuring fail-safe power disconnect without software dependency.
Is the LTC2926IGN#TRPBF pin-compatible with other members of the LTC292x family?
The LTC2926IGN#TRPBF shares identical 20-lead SSOP (GN) pinout with LTC2925IGN#TRPBF, differing only in functionality: LTC2926 provides full three-rail support (TRACK1/FB1/S1/D1/SGATE1 + TRACK2/FB2/S2/D2/SGATE2), while LTC2925 omits the second slave channel. No PCB redesign is needed when upgrading from LTC2925 to LTC2926IGN#TRPBF, though unused pins (e.g., TRACK2) must remain unconnected or grounded per datasheet guidance.
LTC2926IGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Power Supply Controller
- Voltage - Input:
- -
- Voltage - Supply:
- 2.9V ~ 5.5V
- Current - Supply:
- 2.5 mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
LTC2926IGN#TRPBF FAQ
1.How can I place an order for LTC2926IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2926IGN#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 LTC2926IGN#TRPBF reliable?
The price and inventory of LTC2926IGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2926IGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2926IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2926IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2926IGN#TRPBF?
LTC2926IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2926IGN#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 LTC2926IGN#TRPBF?
For technical support, including LTC2926IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2926IGN#TRPBF requirements.
6.How does Aetrix verify that LTC2926IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2926IGN#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 LTC2926IGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2926IGN#TRPBF?
All LTC2926IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2926IGN#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 LTC2926IGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC2926IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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