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Analog Devices Inc. LTC2920-1CS5#TRPBF
- Part No.:
- LTC2920-1CS5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC2920-1CS5#TRPBF.pdf
- Description:
- IC SNGL/DUAL PWR CTRLR TSOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2920-1CS5#TRPBF from Analog Devices (formerly Linear Technology) is a single-channel power supply voltage margining controller IC that sources or sinks precision current into the feedback node of DC/DC converters or power modules to adjust output voltage ±5% for automated production testing. It features 0.4% typical margining accuracy, 400:1 programmable current range (5μA–2mA), and operates from 2.3V to 6V VCC. Used in high-reliability PCB test systems for validating power integrity at voltage extremes.
For engineers reviewing the LTC2920-1CS5#TRPBF datasheet, LTC2920-1CS5#TRPBF pinout, LTC2920-1CS5#TRPBF application, or LTC2920-1CS5#TRPBF equivalent, key selection criteria include margin current accuracy over temperature, IM output compliance voltage range (0.55V to VCC–0.55V), control logic states (High/Float/Low), single-resistor current programming, and ThinSOT-5 package compatibility with automated test fixtures.
Technical Context
The LTC2920-1CS5#TRPBF implements a precision current-source/sink architecture controlled by a three-state IN1 input (VIH ≥ 2.4V, VIL ≤ 0.6V, VOFF = 1.1–1.4V) to drive the IM1 output. Current magnitude is set via external RSET connected between RS1 and either GND (low range: 5–167μA) or VCC (high range: 150μA–2mA), with 1V/RSET or 30V/RSET scaling respectively.
Its internal trimmed voltage reference enables <0.4% typical margining accuracy across 0°C to 70°C. The IM1 output maintains sourcing/sinking capability only within VMARGIN compliance (0.55V ≤ VM ≤ VCC–0.55V), and fault current is suppressed when VCC is sequenced before the margined supply to prevent overvoltage events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 6V - powers internal circuitry and supplies current to IM1 output |
| IM1 Current Range | 5μA to 2mA - selectable via RSET connection to GND (low) or VCC (high) |
| Margin Accuracy | ±0.4% typical - ensures precise voltage deviation from nominal during production test |
| VMARGIN Compliance | 0.55V to (VCC – 0.55V) - defines valid voltage window for reliable IM1 sourcing/sinking |
| IN1 Logic States | High (sink), Float/Low (source), Off (high-Z) - enables three-mode control without external logic |
| Turn-On/Turn-Off Time | 15–100μs - supports fast-margining sequences in automated test equipment |
| Package | 5-pin ThinSOT (S5) - 0.95mm height, compatible with high-density PCB layouts and pick-and-place |
Pinout & Package
Package: 5-lead ThinSOT (S5), 0.95mm profile, RoHS-compliant, rated for 0°C to 70°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Supply Input | Power source for internal circuits and IM1 current path; must be ≥0.2V above IM1 voltage to prevent fault current |
| 2 (GND) | Ground Reference | Return path for sunk IM1 current; must connect to same ground as margined power supply |
| 3 (IM1) | Margin Current Output | Sources or sinks programmed current into feedback/trim pin; compliance limited to 0.55V–(VCC–0.55V) |
| 4 (RS1) | Current Set Input | Accepts RSET tied to GND (low range) or VCC (high range); sets IM1 magnitude via 1V/RSET or 30V/RSET |
| 5 (IN1) | Control Input | Three-state logic: >2.4V = sink, <0.6V = source, 1.1–1.4V = high-Z - eliminates need for external level shifters |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor current programming | One external RSET (6k–200kΩ) configures full 400:1 IM1 range - reduces BOM count and layout complexity |
| Trimmed on-board voltage reference | Enables <0.4% typical margining accuracy without external calibration - improves test repeatability |
| Three-state IN1 control | Direct interface to FPGA/test controller GPIO without pull-up/down resistors or logic gates |
| Wide IM1 output compliance | Operates reliably from 0.55V to VCC–0.55V - supports margining of low-VOUT (e.g., 1.2V) and high-VOUT (e.g., 5V) rails |
| Low quiescent current | 0.23–1mA ICC(Q) - minimizes system power overhead during standby test phases |
Applications
| Automated PCB Production Testing | DC/DC Converter Module Margining |
|---|---|
Use Scenario: High-volume manufacturing line performing final functional test on server motherboards with multiple regulated rails. IC Role / Device Role / Timing Role: LTC2920-1CS5#TRPBF injects calibrated current into each DC/DC converter's feedback node to shift output ±3% while monitoring downstream logic stability. Use Value: Validates power supply tolerance margins before shipment, reducing field failures caused by voltage-sensitive components like FPGAs and memory interfaces. | Use Scenario: Validating 12V-to-1.8V point-of-load converters used in telecom base station power distribution. IC Role / Device Role / Timing Role: LTC2920-1CS5#TRPBF replaces manual trim-pot adjustments with digitally controlled current injection into the converter's TRIM pin during burn-in stress testing. Use Value: Enables repeatable, programmable margining without mechanical wear or operator variability - critical for AEC-Q200-compliant industrial qualification. |
| Preventative Maintenance Testing | Power Supply Validation in Medical Equipment |
Use Scenario: Field-deployed diagnostic imaging systems undergoing scheduled reliability verification every 6 months. IC Role / Device Role / Timing Role: LTC2920-1CS5#TRPBF is embedded in service-mode firmware to margin critical 3.3V and 5V rails while logging ADC readings from analog sensor chains. Use Value: Detects early-stage power supply drift or feedback resistor degradation before catastrophic failure - extends mean time between repairs. | Use Scenario: Final safety certification testing of MRI power subsystems requiring IEC 60601-1 compliance. IC Role / Device Role / Timing Role: LTC2920-1CS5#TRPBF applies worst-case +5%/−5% voltage deviations to isolated 24V auxiliary rails while monitoring isolation barrier leakage and thermal rise. Use Value: Confirms safe operation under extreme voltage conditions without modifying existing power module hardware or layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply margining applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5487ETE+ | Single-channel DAC-based marginer; requires external op-amp and reference; 12-bit resolution; no integrated current sink/source | Needs additional active components for current generation; less compact; higher design complexity | Choose when fine-grained digital control (I²C interface) is required over simplicity and board space savings |
| TPS65988DHFR | USB-C PD controller with integrated margining assist; supports only specific PMBus-configured rails; not standalone | Limited to USB-C power delivery ecosystems; no support for generic DC/DC or brick modules | Choose only for Type-C port power validation; not suitable as general-purpose margining replacement |
Compared with MAX5487ETE+ and TPS65988DHFR, the LTC2920-1CS5#TRPBF delivers plug-and-play margining with minimal external components, guaranteed current accuracy, and direct compatibility with legacy power supply architectures - making it optimal for cost-sensitive, high-volume production test environments where reliability and ease of integration are paramount.
Availability
LTC2920-1CS5#TRPBF is available at Aetrix Electronics and suitable for automated PCB production testing, DC/DC converter module margining, and preventative maintenance testing requiring stable component supply and long-term lifecycle support.
Supply support for LTC2920-1CS5#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 healthcare markets.
The LTC2920 product line was developed by Linear Technology (acquired by ADI in 2017) specifically for automated power supply voltage margining in high-reliability manufacturing and field maintenance - emphasizing precision, simplicity, and robustness over programmability.
FAQ
What is the operating temperature range for the LTC2920-1CS5#TRPBF?
The LTC2920-1CS5#TRPBF is specified for commercial-grade operation from 0°C to 70°C ambient temperature. Its electrical characteristics - including IM1 current accuracy, VCC supply range, and IN1 logic thresholds - are guaranteed across this full range. The device uses an internal trimmed voltage reference to maintain <0.4% typical margining accuracy without external calibration, making it suitable for factory floor environments where temperature stability cannot be tightly controlled.
How does the LTC2920-1CS5#TRPBF achieve its 400:1 current programming range?
The LTC2920-1CS5#TRPBF achieves its 400:1 IM1 current range (5μA to 2mA) through dual-range resistor programming: connecting RSET between RS1 and GND selects the low range (1V/RSET), while connecting RSET between RS1 and VCC selects the high range (30V/RSET). This architecture allows a single 6k–200kΩ resistor to cover both sub-100μA precision margining and >1mA high-drive applications - eliminating the need for multiple resistors or external amplifiers in the LTC2920-1CS5#TRPBF design.
Can the LTC2920-1CS5#TRPBF be used with power supply modules that have a trim pin instead of a feedback pin?
Yes, the LTC2920-1CS5#TRPBF can margin power supply modules with trim pins by injecting calibrated current directly into the trim node. The device's IM1 output compliance (0.55V to VCC–0.55V) and ability to source/sink up to 2mA enable compatibility with common "brick" modules. Users must first characterize the module's trim current vs. output voltage relationship (KTRIM = ΔVPSOUT/ITRIM), then select RSET accordingly - either to GND for low-current trim (5–167μA) or to VCC for high-current trim (150μA–2mA).
What happens if the VCC supply to the LTC2920-1CS5#TRPBF is not powered when the margined supply is active?
If VCC is unpowered while the margined supply is active, undesired fault current can flow into the IM1 pin of the LTC2920-1CS5#TRPBF, potentially causing overvoltage at the power supply output and damaging downstream loads. To prevent this, VCC must be sequenced to turn on before the margined supply - ideally by connecting VCC to the margined supply's VIN or VOUT (if within 2.3V–6V), or using a Schottky diode when sourcing from another rail. The LTC2920-1CS5#TRPBF datasheet specifies VCC must remain ≥0.2V above IM1 voltage to limit fault current to <5μA.
Is the LTC2920-1CS5#TRPBF pin-compatible with the LTC2920-2 series?
No, the LTC2920-1CS5#TRPBF is not pin-compatible with any LTC2920-2 variant. The LTC2920-1CS5#TRPBF uses a 5-pin ThinSOT (S5) package with pins VCC, GND, IM1, RS1, and IN1. In contrast, the LTC2920-2CMS8 uses an 8-pin MSOP package with duplicated channels (IN1/IN2, RS1/RS2, IM1/IM2) plus shared VCC and GND. There is no mechanical or electrical pin mapping between the two families - the LTC2920-1CS5#TRPBF is a dedicated single-channel solution optimized for space-constrained, cost-sensitive margining applications.
LTC2920-1CS5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Single/Dual Power Supply Controller
- Voltage - Input:
- -
- Voltage - Supply:
- 2.3V ~ 6V
- Current - Supply:
- 230 µA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LTC2920-1CS5#TRPBF FAQ
1.How can I place an order for LTC2920-1CS5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2920-1CS5#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 LTC2920-1CS5#TRPBF reliable?
The price and inventory of LTC2920-1CS5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2920-1CS5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2920-1CS5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2920-1CS5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2920-1CS5#TRPBF?
LTC2920-1CS5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2920-1CS5#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 LTC2920-1CS5#TRPBF?
For technical support, including LTC2920-1CS5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2920-1CS5#TRPBF requirements.
6.How does Aetrix verify that LTC2920-1CS5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2920-1CS5#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 LTC2920-1CS5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2920-1CS5#TRPBF?
All LTC2920-1CS5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2920-1CS5#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 LTC2920-1CS5#TRPBF part is unused and in its original packaging.
Return procedure for LTC2920-1CS5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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