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Analog Devices Inc. LTC3586EUFE-1#PBF
- Part No.:
- LTC3586EUFE-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC3586EUFE-1#PBF.pdf
- Description:
- IC POWER MANAGER USB 38-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:180
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Product details
Overview
LTC3586EUFE-1#PBF from Analog Devices (formerly Linear Technology) is a highly integrated USB power manager IC for Li-Ion/Polymer battery systems, combining a switching PowerPath controller with Bat-Track adaptive output control, a 4.1V float voltage battery charger (1.5A max), dual synchronous buck regulators (400mA each), a synchronous buck-boost regulator (1A), and a synchronous boost regulator (800mA). It delivers instant-on operation and automatic load prioritization in compact handheld USB devices.
For engineers reviewing the LTC3586EUFE-1#PBF datasheet, LTC3586EUFE-1#PBF pinout, LTC3586EUFE-1#PBF application, or LTC3586EUFE-1#PBF equivalent, key selection considerations include USB current limit configuration (100mA/500mA/1A), 4.1V vs 4.2V float voltage differentiation from LTC3586, thermal regulation behavior, ideal diode forward voltage (<15mV at 10mA), and VOUT3 buck-boost output range (2.75V–5.6V).
Technical Context
The LTC3586EUFE-1#PBF implements a multi-regulator architecture with four independent switching channels: two pulse-skip/burst-mode bucks (VIN1/VIN2), one buck-boost (VIN3/VOUT3) using four internal MOSFETs (SWAB3/SWCD3), and one boost (VIN4/VOUT4). Its PowerPath controller uses adaptive Bat-Track output control to maintain VOUT ≈ BAT + 0.3V during charging while limiting input current via CLPROG resistor programming.
It integrates a full-featured linear-compatible battery charger with 4.1V float voltage (LTC3586-1 variant), trickle charge threshold (2.7–3.0V), C/10 termination detection, and NTC-based thermal fault monitoring. The always-on 3.3V LDO (LDO3V3) draws power from VOUT and supports RTC/microcontroller biasing with <20mA load capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBUS Input Range | 4.35V to 5.5V - compatible with standard USB 2.0 host and wall adapter supplies; includes 7V transient rating. |
| Battery Float Voltage | 4.100V (typical) - fixed 4.1V regulation for LTC3586-1 variant, enabling safer charging of high-density Li-Poly cells. |
| Charge Current Max | 1022mA (typical, RPROG = 1kΩ) - programmable constant-current charge up to 1.5A with external resistor. |
| VOUT3 Buck-Boost Output | 2.75V to 5.6V - wide adjustable range supports core logic, memory, or interface rails requiring dynamic voltage scaling. |
| Switching Frequency | 2.25MHz (typical) - enables use of small 2.2µH inductors and 10µF ceramic output capacitors for space-constrained layouts. |
| Quiescent Current (VBUS) | 0.044mA (suspend mode) - ultra-low standby draw preserves battery life when USB is disconnected or suspended. |
| Package | 38-pin 4mm × 6mm × 0.75mm QFN - low-profile thermally enhanced package with exposed pad (Pin 39 = GND) for PCB heat sinking. |
Pinout & Package
Package: 38-pin plastic QFN (4mm × 6mm × 0.75mm), exposed thermal pad (Pin 39 = GND), RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM0, ILIM1 (Pins 1, 2) | USB current limit select inputs | Binary-coded configuration for 100mA (1x), 500mA (5x), 1A (10x), or suspend mode; no external pull-up required. |
| LDO3V3 (Pin 3) | Always-on 3.3V LDO output | Supplies RTC, watchdog MCU, or low-power logic; requires 1µF bypass capacitor; disabled if tied to VOUT. |
| CLPROG (Pin 4) | VBUS current limit programming/monitoring node | Resistor-to-ground sets precise input current limit (e.g., 3.01kΩ = 500mA); internal servo holds 1.188V during regulation. |
| VOUT4 (Pins 6, 7) | Boost regulator output power pins | Delivers ≥800mA at 5V; requires 10µF MLCC placed adjacent to pins for stability and ripple suppression. |
| FB4 (Pin 10) | Boost regulator feedback input | Servos to 0.80V; external resistor divider sets VOUT4 (e.g., 5V = 1MΩ/160kΩ); enables precision output adjustment. |
| EN3 (Pin 18) | Buck-boost regulator enable input | Active-high digital control; allows system-level sequencing and power-state management of VOUT3 rail. |
| BAT (Pin 32) | Li-Ion battery connection terminal | Direct interface to single-cell battery; supports ideal diode path (internal 180mΩ PMOS + external FET control via GATE). |
| VOUT (Pin 34) | PowerPath output / charger input node | Primary system power rail; dynamically shared between load and battery; maintains >3.5V even at low battery (2.8V). |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Bat-Track PowerPath | Maintains VOUT ≈ BAT + 0.3V during charging, minimizing voltage drop across internal ideal diode and preserving system uptime. |
| Programmable USB Current Limit | Four discrete settings (100mA/500mA/1A/suspend) selected by ILIM0/ILIM1, ensuring compliance with USB 2.0 and BC1.2 specifications. |
| Integrated Ideal Diode + External FET Control | Internal 180mΩ PMOS plus GATE pin drives external P-channel MOSFET (e.g., Si2333), reducing total forward drop to <2mV at 10mA. |
| Thermal Regulation & NTC Monitoring | Automatic charge current reduction above 110°C junction temperature; cold/hot battery fault detection via NTC pin with 1.5% hysteresis. |
| Multi-Mode Regulator Control | MODE pin selects Pulse-Skip (low-noise) or Burst Mode (ultra-low IQ) for bucks/buck-boost; independent ENx pins allow per-rail sequencing. |
Applications
| Digital Still Cameras | HDD-Based MP3 Players |
|---|---|
Use Scenario: Compact camera with USB-powered image capture, flash charging, and real-time video encoding. IC Role / Device Role / Timing Role: Central power manager coordinating USB input, Li-Poly battery charge/discharge, sensor bias (buck-boost), processor core (buck), and flash LED driver (boost). Use Value: Enables "instant-on" startup from battery while maintaining USB compliance; 2.25MHz switching avoids audible noise in audio/video subsystems. |
Use Scenario: Portable music player with mechanical HDD, OLED display, and USB sync/charge functionality. IC Role / Device Role / Timing Role: Supplies regulated 3.3V (LDO3V3) for HDD controller RTC, 2.5V/1.2V (bucks) for SoC cores, 5V (boost) for display backlight, and 3.3V–5.6V (buck-boost) for HDD motor drive. Use Value: Dual-buck efficiency (>90% at 100mA) extends playback time; buck-boost delivers stable 3.3V even as battery drops from 4.2V to 2.8V. |
| GPS Navigation Devices | USB-Powered Handheld PDAs |
Use Scenario: Automotive GPS unit with cold-start battery assist, USB firmware update, and continuous GNSS tracking. IC Role / Device Role / Timing Role: Manages priority between GPS RF front-end (buck-boost), baseband processor (buck), backup SRAM (LDO3V3), and USB enumeration (VBUS current limiting). Use Value: NTC monitoring prevents charging outside –10°C to +45°C operating range; <30µA no-load quiescent current preserves battery during parking mode. |
Use Scenario: Enterprise PDA with barcode scanner, Wi-Fi, touchscreen, and USB host/device switching. IC Role / Device Role / Timing Role: Provides isolated 5V (boost) for USB OTG, 1.8V/2.5V (bucks) for application processor I/O, 3.3V (LDO3V3) for touch controller, and VOUT3 for scanner laser driver. Use Value: Four independent regulators eliminate need for external DC/DCs; CLPROG-based current limiting ensures safe USB host port operation during simultaneous charging and data transfer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3586EUFE#PBF | 4.2V float voltage; identical pinout and feature set except battery regulation point. | Preferred for standard Li-Ion cells requiring 4.2V termination; not suitable where 4.1V thermal derating is mandated. | Select when datasheet specifies 4.2V nominal cell chemistry and no thermal derating requirement. |
| MAX14744ETA+T | Single buck-boost + charger only; lacks dual bucks, boost, and LDO3V3; 20-pin TQFN. | Targeted at simpler systems needing only one regulated rail; no support for multi-rail SoC power sequencing. | Choose for cost-sensitive, space-constrained designs requiring only basic USB charging and one adjustable output. |
Compared with LTC3586EUFE#PBF and MAX14744ETA+T, the LTC3586EUFE-1#PBF provides unique integration of four switching regulators plus an always-on LDO in a single 38-pin QFN-enabling full system power management without external regulators-while its 4.1V float voltage offers tighter thermal safety margins than the 4.2V variant.
Availability
LTC3586EUFE-1#PBF is available at Aetrix Electronics and suitable for digital still cameras, GPS navigation units, and USB-powered handheld PDAs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for LTC3586EUFE-1#PBF 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 continues to develop high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and portable applications.
The LTC3586EUFE-1#PBF belongs to Linear's PowerPath™ family of USB-aware power managers, designed specifically to simplify battery-backed USB device design by integrating charging, path control, and multi-rail regulation in one package.
FAQ
What is the key functional difference between LTC3586EUFE-1#PBF and LTC3586EUFE#PBF?
The LTC3586EUFE-1#PBF features a 4.100V typical battery float voltage, whereas the LTC3586EUFE#PBF uses 4.200V. This 100mV reduction improves thermal safety margin for high-energy-density Li-Polymer cells and aligns with JEITA-recommended derated charging profiles. Both share identical pinout, regulator specs, and PowerPath functionality.
How does the CLPROG pin configure USB current limits on the LTC3586EUFE-1#PBF?
The CLPROG pin uses a resistor-to-ground to set the maximum VBUS current: for example, a 3.01kΩ resistor yields ~500mA (5x mode), while 15.0kΩ gives ~100mA (1x mode). The internal servo regulates CLPROG to 1.188V, and the measured VBUS current equals (1.188V / RCLPROG) × hCLPROG, where hCLPROG is mode-dependent (1133 mA/mA in 5x mode).
Can the LTC3586EUFE-1#PBF operate without an external NTC thermistor?
Yes - the NTC pin can be grounded to disable thermal monitoring. However, doing so removes overtemperature and cold-temperature charge suspension, violating UL/IEC 62368-1 battery safety requirements. For certified designs, a properly biased NTC network (VBUS → bias resistor → NTC → GND) is mandatory to enable VCOLD/VHOT fault detection.
What is the minimum input voltage required for the buck-boost regulator (VOUT3) on the LTC3586EUFE-1#PBF?
The buck-boost regulator (VOUT3) operates down to VIN3 = 2.7V, with a minimum regulated output of 2.75V in both PWM and Burst modes. Below 2.7V input, regulation is not guaranteed; the device enters UVLO and disables SWAB3/SWCD3 switching. Startup requires VIN3 ≥ 2.8V to ensure reliable soft-start initiation.
Does the LTC3586EUFE-1#PBF support automatic USB suspend detection?
Yes - the LTC3586EUFE-1#PBF detects USB suspend via the ILIM0/ILIM1 pins configured to "Suspend" (ILIM1=1, ILIM0=0), reducing VBUS quiescent current to 0.38mA (typical) and disabling all switching regulators except the always-on LDO3V3. No external USB transceiver or protocol stack is needed; detection is purely based on programmed current-limit state.
LTC3586EUFE-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Bat-Track™, PowerPath™
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Handheld/Mobile Devices
- Current - Supply:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-QFN (4x6)
LTC3586EUFE-1#PBF FAQ
1.How can I place an order for LTC3586EUFE-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3586EUFE-1#PBF 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 LTC3586EUFE-1#PBF reliable?
The price and inventory of LTC3586EUFE-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3586EUFE-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3586EUFE-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3586EUFE-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3586EUFE-1#PBF?
LTC3586EUFE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3586EUFE-1#PBF 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 LTC3586EUFE-1#PBF?
For technical support, including LTC3586EUFE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3586EUFE-1#PBF requirements.
6.How does Aetrix verify that LTC3586EUFE-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3586EUFE-1#PBF 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 LTC3586EUFE-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3586EUFE-1#PBF?
All LTC3586EUFE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3586EUFE-1#PBF, 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 LTC3586EUFE-1#PBF part is unused and in its original packaging.
Return procedure for LTC3586EUFE-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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