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Analog Devices Inc. LTC4420CMSE#TRPBF
- Part No.:
- LTC4420CMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- OR Controllers, Ideal Diodes
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC4420CMSE#TRPBF.pdf
- Description:
- IC SOURCE SELECTOR SWITCH 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,949
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Product details
Overview
LTC4420CMSE#TRPBF from Analog Devices is a dual-input micropower PowerPath™ prioritizer IC that selects between primary (V1) and backup (V2) supplies to maintain continuous output power during brownout or main supply loss. It features internal 2Ω PMOS switches, ±1.5% accurate adjustable switchover threshold, 3.6µA operating current, and 320nA V2 standby current when V1 is active - enabling long-life battery backup in portable POS terminals and industrial controllers.
For engineers reviewing the LTC4420CMSE#TRPBF datasheet, LTC4420CMSE#TRPBF pinout, LTC4420CMSE#TRPBF application, or LTC4420CMSE#TRPBF equivalent, key selection criteria include verified break-before-make switchover time (1–5µs), V2 undervoltage monitoring duty cycle control via V2TEST, freshness seal mode for Li-SOCl₂ battery preservation, and ±2.3% V2UV comparator accuracy over temperature.
Technical Context
The LTC4420CMSE#TRPBF implements a dual-channel priority arbitration architecture with independent voltage qualification logic: V1 validity requires ≥1.55V and ADJ ≥1.097V sustained for 64ms; V2 validity depends on periodic low-duty-cycle monitoring (configurable 1–168ms intervals) of V2UV against a 0.387V reference. Switchover uses fast non-overlap control to prevent cross-conduction, with 50mV reverse-voltage detection enabling break-before-make transitions.
Its internal protection includes overcurrent limiting (0.5–1.6A), thermal shutdown, –15V reverse supply blocking, and freshness seal mode activated by V2OK latching low - all managed by integrated control logic without external microcontroller intervention. The exposed-pad MSOP package ensures thermal performance with θJA = 40°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 1.8V to 18V input range supports Li-ion, wall adapters, and industrial rails without level-shifting. |
| Quiescent Current (V1 active) | 3.6µA typical - enables >10-year shelf life in always-on backup systems. |
| V2 Standby Current | 320nA when V1 powers OUT - minimizes hold-up battery drain during normal operation. |
| Switch RON | 2Ω typical per channel - limits conduction loss to <100mW at 500mA load. |
| Switchover Threshold Accuracy | ±1.5% - ensures precise 5.6V–6V brownout response for 2-cell Li-ion protection. |
| V2UV Comparator Accuracy | ±2.3% - guarantees reliable 6V Li-SOCl₂ undervoltage disconnect across –40°C to 85°C. |
| Break-Before-Make Time | 1–5µs - prevents output droop >50mV during source transition with 10µF COUT. |
Pinout & Package
Package: 12-lead plastic MSOP with exposed pad (GND); 0°C to 70°C operating range; thermally enhanced layout required (exposed pad must be soldered to PCB ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 | Primary power input | Supplies OUT when valid; must exceed 1.55V for ≥64ms to qualify. |
| V2 | Backup power input | Connects to OUT only after V1 invalidation and V2UV ≥0.387V confirmation. |
| OUT | Priority-selected output | Delivers power from V1 or V2; requires ≥1µF bypass capacitor; drops 50mV below source before switchover. |
| ADJ | V1 switchover threshold input | Resistive divider sets V1-to-V2 transition point; 1.047V falling threshold enables precision brownout response. |
| V2UV | V2 undervoltage monitor input | Resistive divider referenced to 0.387V internal reference; monitored only during GNDSW pulsed-low intervals. |
| V2DIS | V2 path disable control | Drives low to disconnect V2 from OUT when V2UV falls below threshold - prevents weak-battery loading. |
| V2TEST | V2 monitoring duty cycle enable | Configures V2UV sampling interval (1–168ms) to trade off quiescent current vs responsiveness. |
| V2OK | V2 validity status output | Open-drain logic high (5µA pull-up) when V2UV >0.387V at end of monitoring period - used for freshness seal control. |
| GNDSW | Pulsed ground for V2 divider | Activates V2–V2UV–GNDSW resistive network during monitoring; eliminates static divider current. |
| CMP1 / CMPOUT1 | Auxiliary voltage monitor | 0.387V-referenced comparator for early warning (e.g., V1UV <6V) with open-drain output. |
| GND | Device ground reference | Common return for all circuitry; exposed pad is electrically connected GND and must be soldered. |
Key Features
| Feature | Design Value |
|---|---|
| Freshness seal mode | Prevents V2 battery discharge during storage by latching V2OK low and disabling V2 path until V1 reactivation. |
| Low-duty-cycle V2 monitoring | V2UV sampled only periodically (duty cycle ~0.0015%–0.1%) - reduces average V2 current to <1µA. |
| Reverse supply protection | Blocks –15V reverse voltage on inactive inputs - protects against accidental polarity reversal or hot-swap transients. |
| Break-before-make switchover | Guaranteed non-overlap timing (1–5µs) prevents shoot-through and maintains output stability during source handoff. |
| Thermal and overcurrent protection | Internal foldback current limiting (0.5–1.6A) and thermal shutdown prevent damage under sustained overload. |
Applications
| Point-of-Sale (POS) Terminals | Industrial PLC Controllers |
|---|---|
Use Scenario: Maintains real-time transaction logging during AC power interruption using a Li-SOCl₂ backup battery. IC Role / Device Role / Timing Role: PowerPath prioritizer managing seamless V1 (24V DC rail) to V2 (3.6V battery) handoff with <5µs dead time. Use Value: Prevents data corruption by sustaining 3.3V logic supply for >30 seconds without output droop exceeding 50mV. |
Use Scenario: Powers I/O modules during factory floor power dips while preserving battery charge for emergency shutdown sequences. IC Role / Device Role / Timing Role: Dual-supply arbitrator enforcing priority-based sourcing with programmable V1 undervoltage lockout at 20.5V. Use Value: Extends Li-thionyl chloride battery life to >10 years via 320nA V2 standby current and configurable V2 monitoring intervals. |
| Portable Medical Monitors | Ruggedized Handheld Scanners |
Use Scenario: Ensures uninterrupted ECG waveform capture during battery swap in field-deployed diagnostic devices. IC Role / Device Role / Timing Role: Micropower switchover controller enabling zero-interruption transition between main Li-ion pack and removable backup cell. Use Value: Achieves <100ms total switchover latency including qualification delay, meeting IEC 60601-1 continuity requirements. |
Use Scenario: Sustains barcode scanning functionality during brief AC adapter disconnection in warehouse environments. IC Role / Device Role / Timing Role: Priority power selector with reverse-blocking capability protecting against accidental 12V/24V polarity misconnection. Use Value: Eliminates need for external Schottky diodes, reducing BOM cost and forward-drop losses by >300mW at 500mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input power prioritization applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2113APWR | Single-threshold auto-switching; no adjustable V2UV monitoring or freshness seal; 25µA quiescent current. | Lacks programmable V2 duty cycle and battery preservation features - unsuitable for multi-year Li-SOCl₂ backup. | Choose for cost-sensitive, short-duration backup where V2 monitoring simplicity outweighs battery longevity. |
| LTC4412EMS#PBF | Single-input ideal diode controller; requires external MOSFETs; no V2 monitoring or switchover logic. | No integrated backup arbitration - needs companion IC for V2 supervision and control logic. | Choose when discrete FET optimization is required or when existing design already implements external monitoring circuitry. |
Compared with TPS2113APWR and LTC4412EMS#PBF, the LTC4420CMSE#TRPBF uniquely integrates dual-supply qualification, low-duty-cycle V2 monitoring, and freshness seal - delivering single-chip battery preservation and sub-µA standby performance unattainable with alternatives.
Availability
LTC4420CMSE#TRPBF is available at Aetrix Electronics and suitable for point-of-sale terminals, industrial PLC controllers, and portable medical monitors requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC4420CMSE#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power and signal chain solutions.
The LTC4420CMSE#TRPBF belongs to Analog Devices' PowerPath™ family of intelligent power switching ICs, designed specifically for seamless, low-quiescent-current backup power management in battery-critical applications.
FAQ
What is the maximum input voltage rating for LTC4420CMSE#TRPBF?
The LTC4420CMSE#TRPBF supports input voltages up to 24V on V1 and V2 pins, with absolute maximum ratings of –15V to 24V. This allows direct interfacing with 12V/24V industrial rails and 2-cell Li-ion batteries (up to 8.4V) without external clamping. Operation remains specified from 1.8V to 18V, ensuring compatibility with low-voltage microcontrollers and legacy systems.
How does LTC4420CMSE#TRPBF achieve 320nA V2 standby current?
The LTC4420CMSE#TRPBF achieves 320nA V2 standby current by disabling the V2–V2UV–GNDSW resistive divider during idle periods and using an open-drain GNDSW pin that only pulls low during brief V2UV monitoring windows. When V1 powers OUT, internal circuitry isolates V2 entirely except for minimal gate leakage - confirmed in Electrical Characteristics Table (IV2 = 320nA typ at V1=3.6V, V2=8.4V).
Can LTC4420CMSE#TRPBF support reverse polarity protection on V1 or V2 inputs?
Yes, the LTC4420CMSE#TRPBF provides inherent reverse polarity protection: it blocks up to –15V on either V1 or V2 inputs when that supply is inactive, preventing backfeed and damage. This is achieved through internal back-to-back PMOS switches and reverse comparator circuitry (VREV threshold = 25–75mV), eliminating need for external TVS or diodes in most cases.
What is the purpose of the V2TEST pin on LTC4420CMSE#TRPBF?
The V2TEST pin on LTC4420CMSE#TRPBF controls the duty cycle of V2 undervoltage monitoring - setting sampling intervals from 1ms to 168ms and overall monitoring frequency between 0.0015% and 0.1%. Driving V2TEST high enables full-rate monitoring; pulling it low disables V2UV checks entirely when V1 is valid, further reducing system quiescent current.
Does LTC4420CMSE#TRPBF require external components for basic operation?
Yes, the LTC4420CMSE#TRPBF requires external resistive dividers on ADJ (for V1 switchover threshold) and V2UV/GNDSW (for V2 undervoltage threshold), plus ≥1µF bypass capacitors on V1, V2, and OUT. These are mandatory for functional qualification - no internal references or regulators eliminate need for external passives, but precision thresholds depend on resistor matching and tolerance.
LTC4420CMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PowerPath™
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Source Selector Switch
- FET Type:
- N-Channel
- Ratio - Input:Output:
- 2:1
- Internal Switch(s):
- Yes
- Delay Time - ON:
- -
- Delay Time - OFF:
- -
- Current - Output (Max):
- 1.6A
- Current - Supply:
- 3.6 µA
- Voltage - Supply:
- 1.8V ~ 18V
- Applications:
- Battery Backup
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LTC4420CMSE#TRPBF FAQ
1.How can I place an order for LTC4420CMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4420CMSE#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 LTC4420CMSE#TRPBF reliable?
The price and inventory of LTC4420CMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4420CMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4420CMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4420CMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4420CMSE#TRPBF?
LTC4420CMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4420CMSE#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 LTC4420CMSE#TRPBF?
For technical support, including LTC4420CMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4420CMSE#TRPBF requirements.
6.How does Aetrix verify that LTC4420CMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4420CMSE#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 LTC4420CMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4420CMSE#TRPBF?
All LTC4420CMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4420CMSE#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 LTC4420CMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC4420CMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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