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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Supply Controllers, Monitors

Analog Devices Inc. LTC2920-1CS5#TRM

Name: LTC2920-1CS5#TRM
Brand: Analog Devices Inc.
SKU: LTC2920-1CS5#TRM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC2920-1CS5#TRM

Manufacturer:: Analog Devices Inc.

Category:: Power Supply Controllers, Monitors

Package:: SOT-23-5 Thin, TSOT-23-5

Datasheet:: LTC2920-1CS5#TRM.pdf

Description:: IC SNGL/DUAL PWR CTRLR TSOT23-5

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Product details

Overview

LTC2920-1CS5#TRM from Analog Devices (formerly Linear Technology) is a single-channel precision power supply voltage margining controller IC. It sources or sinks programmable current (5 μA–2 mA) into the feedback node of DC/DC converters or power modules to adjust output voltage ±5% for automated production testing. Designed for high-reliability PCB test systems, it delivers <0.4% typical margining accuracy with 400:1 current programming range and operates from 2.3V to 6V V_CC.

For engineers reviewing the LTC2920-1CS5#TRM datasheet, LTC2920-1CS5#TRM pinout, LTC2920-1CS5#TRM application, or LTC2920-1CS5#TRM equivalent, key selection considerations include its single 5-pin ThinSOT™ package, three-state control logic (High/Float/Low), 0.6V–(V_CC−0.6V) output compliance, trimmed internal reference, and compatibility with feedback-pin and trim-pin power supply architectures.

Technical Context

The LTC2920-1CS5#TRM implements a precision current-source/sink architecture controlled by a 3-level digital input (IN1), enabling symmetric or asymmetric up/down voltage margining without external switches or relays. Its IM1 output delivers calibrated current based on resistor-programmed gain (×1 or ×30) at RS1, with accuracy maintained across 0.6V ≤ V_MARGIN ≤ (V_CC − 0.6V).

Internally, it integrates a trimmed bandgap voltage reference, UVLO, thermal shutdown, and noise-suppressed input detection. Control timing includes 15–100 μs turn-on/off delays and sub-5 μs current rise/fall times, ensuring clean transitions during automated test sequences without disrupting power supply regulation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3V to 6V - supports wide-input industrial and telecom power rails; requires ≥0.2V headroom above IM1 voltage.
IM1 Current Range	5 μA to 2 mA - selectable via RS1 connection (GND = low range, V_CC = high range); enables ±0.1%–±5% margining on common 3.3V/5V supplies.
Margin Accuracy	Better than 0.4% typical - ensures tight voltage tolerance during burn-in and functional test, reducing false failures in high-volume manufacturing.
Output Compliance	0.6V to (V_CC − 0.6V) - guarantees full current sourcing/sinking capability within this window; critical for compatibility with feedback nodes at ~1.2V.
Control Logic	Three-state IN1 (VIH ≥ 2.4V, VIL ≤ 0.6V, VOFF = 1.1–1.4V) - eliminates need for level-shifting or external logic; float state disables IM1 with <100 nA leakage.
Package	5-lead SOT-23 (ThinSOT™) - 2.9mm × 1.6mm footprint; compatible with standard pick-and-place and reflow processes.
Temp Range	0°C to 70°C (C-grade) - qualified for commercial/industrial test equipment environments without extended thermal derating.

Pinout & Package

5-lead plastic SOT-23 (ThinSOT™) package with exposed pad not electrically connected. Pin 1 = V_CC, Pin 2 = GND, Pin 3 = IM1, Pin 4 = RS1, Pin 5 = IN1. Requires 0.1 μF ceramic bypass capacitor between V_CC and GND, placed adjacent to the device.

Pin/Terminal	Circuit Role	Design Meaning
V_CC (Pin 1)	Supply input	Power source for all internal circuitry; must be stable and low-noise; supplies current to IM1 when sourcing.
GND (Pin 2)	Ground reference	Common return path for IM1 sink current and internal bias; must connect to power supply feedback ground.
IM1 (Pin 3)	Current margining output	Bi-directional current source/sink terminal; connects directly to power supply feedback or trim pin; compliance limited to 0.6V–(V_CC−0.6V).
RS1 (Pin 4)	Current set input	Resistor-programmable gain node; ties to GND for 5–167 μA range or V_CC for 150 μA–2 mA range; sets IM1 magnitude with ≈1V/R_SET relationship.
IN1 (Pin 5)	3-state control input	Determines IM1 direction: >2.4V = sink, <0.6V = source, 1.1–1.4V = high-Z off-state; internal ~10kΩ pull-up to 1.2V enables float detection.

Key Features

Feature	Design Value
Single-resistor current programming	One external R_SET (6kΩ–200kΩ) configures full 400:1 IM1 range - eliminates dual-resistor networks and calibration complexity.
Trimmed internal voltage reference	Enables <0.4% typical margining accuracy without external reference - reduces BOM count and layout sensitivity to noise.
Three-state digital control	IN1 accepts direct MCU GPIO or logic-level signals (no level shifters) and supports high-Z off-state - simplifies test sequencer interface.
Wide output voltage compliance	0.6V to (V_CC − 0.6V) ensures reliable operation with common feedback voltages (e.g., 1.2V, 2.5V) across full V_CC range.
No external switches or relays	Integrated current source/sink replaces mechanical or analog switch solutions - improves reliability, reduces PCB area, and eliminates bounce artifacts.

Applications

Automated PCB Functional Test	DC/DC Converter Margining
Use Scenario: High-volume manufacturing line performing final functional test on server motherboards with multiple regulated rails (12V, 5V, 3.3V, 1.8V). IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM injects precise current into each rail's feedback node under microcontroller control to sweep voltage ±3% while monitoring system stability and timing margins. Use Value: Replaces manual potentiometer adjustment and relay-based test fixtures; achieves <10ms per-rail margining cycle time with <0.4% voltage repeatability.	Use Scenario: Validation of point-of-load (POL) buck converters in telecom base station power subsystems. IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM interfaces directly with the converter's FB pin to apply controlled up/down offsets during thermal stress testing and lifetime reliability screening. Use Value: Enables automated margining without modifying converter compensation network; maintains loop stability while verifying worst-case operating limits.
Power Module Trim-Pin Control	Preventative Maintenance Testing
Use Scenario: Field-deployed industrial PLCs using quarter-brick DC/DC modules with voltage-adjust (TRIM) pins. IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM drives TRIM pin with calibrated current to simulate aging-induced output drift during scheduled maintenance cycles. Use Value: Eliminates need for external trim resistors and switching relays; supports linear, repeatable voltage adjustments matching manufacturer's trim-current specifications.	Use Scenario: Predictive maintenance of medical imaging power supplies where long-term output drift must be verified before failure risk increases. IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM performs periodic ±2.5% margining sweeps on critical 24V and ±15V rails while logging response time and regulation error. Use Value: Detects early-stage feedback resistor degradation or reference drift before catastrophic failure; integrates with existing test firmware via simple GPIO control.

Automated PCB Functional Test

DC/DC Converter Margining

Use Scenario: High-volume manufacturing line performing final functional test on server motherboards with multiple regulated rails (12V, 5V, 3.3V, 1.8V).

IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM injects precise current into each rail's feedback node under microcontroller control to sweep voltage ±3% while monitoring system stability and timing margins.

Use Value: Replaces manual potentiometer adjustment and relay-based test fixtures; achieves <10ms per-rail margining cycle time with <0.4% voltage repeatability.

Use Scenario: Validation of point-of-load (POL) buck converters in telecom base station power subsystems.

IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM interfaces directly with the converter's FB pin to apply controlled up/down offsets during thermal stress testing and lifetime reliability screening.

Use Value: Enables automated margining without modifying converter compensation network; maintains loop stability while verifying worst-case operating limits.

Power Module Trim-Pin Control

Preventative Maintenance Testing

Use Scenario: Field-deployed industrial PLCs using quarter-brick DC/DC modules with voltage-adjust (TRIM) pins.

IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM drives TRIM pin with calibrated current to simulate aging-induced output drift during scheduled maintenance cycles.

Use Value: Eliminates need for external trim resistors and switching relays; supports linear, repeatable voltage adjustments matching manufacturer's trim-current specifications.

Use Scenario: Predictive maintenance of medical imaging power supplies where long-term output drift must be verified before failure risk increases.

IC Role / Device Role / Timing Role: LTC2920-1CS5#TRM performs periodic ±2.5% margining sweeps on critical 24V and ±15V rails while logging response time and regulation error.

Use Value: Detects early-stage feedback resistor degradation or reference drift before catastrophic failure; integrates with existing test firmware via simple GPIO control.

Equivalent & Alternatives

The following parts are listed as comparable options for similar power supply margining applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX5980AETE+T	Single-channel, 10μA–1.5mA range, 2.7V–5.5V V_CC, ±1.5% current accuracy, 10-pin TDFN	Higher current tolerance error; narrower V_CC range; requires external reference for best accuracy	Choose for cost-sensitive designs where ±1.5% margining error is acceptable and board space allows larger package.
TPS65987D-SR	USB-C PD controller with integrated margining DAC (not dedicated current source); 0–2mA, 3.0V–5.5V, ±2% full-scale	Margining is secondary function; lacks three-state control and independent current programming resistor	Choose only if USB-C PD functionality is primary requirement and margining is auxiliary; not drop-in replacement.

Compared with MAX5980AETE+T and TPS65987D-SR, the LTC2920-1CS5#TRM offers superior margining accuracy (<0.4% vs. ±1.5%/±2%), wider V_CC range (2.3–6V), true three-state control, and simpler resistor-based programming - making it optimal for high-precision automated test systems where voltage repeatability is critical.

Availability

LTC2920-1CS5#TRM is available at Aetrix Electronics and suitable for automated PCB functional test, DC/DC converter validation, power module trim-pin control, and preventative maintenance testing requiring stable component supply and guaranteed long-term availability.

Supply support for LTC2920-1CS5#TRM 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) 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 designed specifically for automated power supply voltage margining in high-reliability manufacturing and field maintenance applications, emphasizing precision, simplicity, and robustness over general-purpose programmable current sources.

FAQ

What is the maximum current sourcing/sinking capability of the LTC2920-1CS5#TRM?

The LTC2920-1CS5#TRM provides a programmable margining current range of 5 μA to 2 mA. When RS1 is tied to V_CC, it operates in high range (150 μA–2 mA); when RS1 is tied to GND, it operates in low range (5 μA–167 μA). The exact value is set by R_SET = 1V/I_IM (low range) or R_SET = 30V/I_IM (high range). This range supports ±0.1% to ±5% margining on typical 3.3V and 5V rails.

Can the LTC2920-1CS5#TRM be used with power supply modules that have a TRIM pin instead of a feedback pin?

Yes, the LTC2920-1CS5#TRM is explicitly designed for both feedback-pin and TRIM-pin architectures. For TRIM-pin modules, the required trim current (I_TRIM) is derived from the manufacturer's voltage-trim specification (K_TRIM = ΔV_OUT/I_TRIM). Once I_TRIM is known, R_SET is calculated and connected to GND or V_CC per the LTC2920-1CS5#TRM's low/high range selection - enabling linear, resistor-programmed voltage adjustment without external switches.

What is the purpose of the three-state control input (IN1) on the LTC2920-1CS5#TRM?

The IN1 pin on the LTC2920-1CS5#TRM implements a three-state interface: logic HIGH (>2.4V) commands current sinking, logic LOW (<0.6V) commands current sourcing, and floating or mid-voltage (1.1–1.4V) places IM1 in high-impedance off-state with <100 nA leakage. This eliminates need for external enable logic or level shifters, allowing direct connection to MCU GPIOs and simplifying test sequence control in automated systems using the LTC2920-1CS5#TRM.

How does the LTC2920-1CS5#TRM ensure accurate voltage margining despite variations in external resistor tolerances?

The LTC2920-1CS5#TRM achieves <0.4% typical margining accuracy through an internally trimmed voltage reference and precision current mirror architecture. While external R_SET tolerance contributes to overall error, its impact is attenuated by the voltage margining percentage (e.g., 1% R_SET error causes only ~0.024% error in a 2.5% margin). Combined with low-drift internal components, the LTC2920-1CS5#TRM maintains superior accuracy versus solutions relying solely on external resistor matching.

Is the LTC2920-1CS5#TRM compatible with 1.8V or 2.5V logic control signals?

No - the LTC2920-1CS5#TRM requires IN1 to exceed VIH = 2.4V (for V_CC ≥ 2.5V) to activate sinking mode, and VIL ≤ 0.6V to activate sourcing mode. A 1.8V logic HIGH is insufficient to meet VIH, and 2.5V logic may operate near threshold depending on V_CC. For compatibility with low-voltage controllers, level-shifting circuitry or a GPIO with programmable 3.3V/5V drive is recommended to ensure reliable IN1 state recognition in the LTC2920-1CS5#TRM.

LTC2920-1CS5#TRM Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: SOT-23-5 Thin, TSOT-23-5

Packaging:: Cut Tape (CT)

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#TRM FAQ

1.How can I place an order for LTC2920-1CS5#TRM through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC2920-1CS5#TRM 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#TRM reliable?

The price and inventory of LTC2920-1CS5#TRM 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#TRM is usually 5 days.

3.What payment methods are accepted for LTC2920-1CS5#TRM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2920-1CS5#TRM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC2920-1CS5#TRM?

LTC2920-1CS5#TRM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC2920-1CS5#TRM 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#TRM?

For technical support, including LTC2920-1CS5#TRM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2920-1CS5#TRM requirements.

6.How does Aetrix verify that LTC2920-1CS5#TRM is sourced from the original manufacturer or authorized distributors?

All LTC2920-1CS5#TRM 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#TRM meets industry standards.

7.What is the process for return or replacement of LTC2920-1CS5#TRM?

All LTC2920-1CS5#TRM units undergo pre-shipment inspection (PSI). If there is an issue with LTC2920-1CS5#TRM, 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#TRM part is unused and in its original packaging.

Return procedure for LTC2920-1CS5#TRM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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