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Analog Devices Inc. LT3582EUD-12#TRPBF
- Part No.:
- LT3582EUD-12#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LT3582EUD-12#TRPBF.pdf
- Description:
- IC REG BUCK BOOST 12V DL 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT3582EUD-12#TRPBF from Analog Devices (formerly Linear Technology) is a dual monolithic DC/DC converter IC integrating a boost and an inverting switching regulator, pre-configured for ±12V outputs with factory-programmed OTP, 2.55V–5.5V input range, 325μA active quiescent current, and 16-pin 3mm × 3mm QFN package - used in AMOLED display power supplies requiring stable dual-rail generation from single 5V sources.
For engineers reviewing the LT3582EUD-12#TRPBF datasheet, LT3582EUD-12#TRPBF pinout, LT3582EUD-12#TRPBF application, or LT3582EUD-12#TRPBF equivalent, key selection criteria include fixed ±12V output accuracy (±0.075V), integrated feedback resistors, output disconnect capability, I²C interface compatibility (though unused in this variant), and thermal performance up to 125°C junction temperature.
Technical Context
The LT3582EUD-12#TRPBF implements two independent switching regulators in one die: a boost converter with NMOS switch (350mA current limit, 500mΩ on-resistance) generating +12V, and an inverting converter with PMOS switch (600mA current limit, 560mΩ on-resistance) generating –12V - both using adaptive peak-current and off-time control to minimize output ripple and maximize efficiency across 0–80mA load range.
Power-up sequencing is fixed to simultaneous rise of VOUTP and VOUTN (PUSEQ = 11), with soft-start controlled by internal 1μA ramp current charging external capacitors on RAMPP and RAMPN pins; power-down discharge is permanently enabled (PDDIS = 1), actively sinking ±4.2mA from outputs during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | Fixed +12V and –12V (±0.075V tolerance over temp) |
| Input Voltage Range | 2.55V to 5.5V - supports USB 5V, Li-ion single-cell, and regulated 3.3V rails |
| Quiescent Current | 325μA active mode; 0.01μA shutdown - enables always-on biasing in low-power systems |
| Switch Current Limits | 350mA (boost), 600mA (inverting) - sets max continuous output current per rail |
| Package | 16-pin 3mm × 3mm QFN with exposed pad - provides 68°C/W θJA for thermal management |
| Operating Temperature | –40°C to +125°C junction - qualified for industrial and automotive cabin applications |
| Output Disconnect | Integrated PMOS switch (1.4Ω on-resistance, 155mA limit) - isolates VOUTP during shutdown |
Pinout & Package
LT3582EUD-12#TRPBF is housed in a 16-pin, 3mm × 3mm plastic QFN package with exposed thermal pad (Pin #17, GND). The package supports reflow soldering and requires PCB thermal vias under the exposed pad for reliable operation at full load and high ambient temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CA (1) | I²C address select | Configures 7-bit slave address (0110001 or 1000101); tied to GND or VIN - unused in LT3582EUD-12#TRPBF |
| VOUTN (2) | Negative regulated output | Delivers –12V output; requires local ceramic bypass capacitor to GND |
| SWN (3,4) | Inverting switch node | Drain of internal PMOS; connects to inductor - keep trace area minimal to reduce EMI |
| VIN (5) | Main input supply | 2.55–5.5V input; must be bypassed with ≥10μF ceramic capacitor near pin |
| RAMPN (6) | Inverting soft-start ramp | Charged by internal 1μA current; sets VOUTN ramp rate - capacitor to GND required |
| RAMPP (7) | Boost soft-start ramp | Charged by internal 1μA current; sets VOUTP ramp rate - capacitor to GND required |
| SHDN (8) | Enable/disable control | Active-high logic (VIH ≥ 1.1V); includes 222kΩ internal pull-down |
| VOUTP (9) | Positive regulated output | Delivers +12V output; isolated by internal disconnect switch during shutdown |
| CAPP (10,11) | Boost capacitor connection | Connects to boost output capacitor; remains near VIN during shutdown |
| SWP (12) | Boost switch node | Drain of internal NMOS; connects to boost inductor - minimize trace inductance |
| GND (13) | Power ground | Primary ground reference; tie to solid ground plane with low-inductance path |
| VPP (14) | OTP programming voltage | 13–15V required only for OTP write - float in normal operation |
| SDA (15) | I²C bidirectional data | Unused in LT3582EUD-12#TRPBF; tie to GND or VIN if not connected |
| SCL (16) | I²C clock input | Unused in LT3582EUD-12#TRPBF; tie to GND or VIN if not connected |
| Exposed Pad (17) | Thermal & electrical ground | Mandatory GND connection via multiple thermal vias - critical for thermal reliability |
Key Features
| Feature | Design Value |
|---|---|
| Dual-output topology | Single-inductor inverting + boost converters eliminate need for separate negative supply rails |
| Factory-programmed OTP | ±12V outputs, simultaneous power-up sequencing, and permanent power-down discharge are hard-coded and immutable |
| Integrated feedback network | All resistor dividers embedded - eliminates external components and improves accuracy/stability |
| Output disconnect | VOUTP isolation during shutdown prevents backfeed and enables clean system power-down |
| Low-noise regulation | Novel dual-control scheme minimizes output voltage ripple even at audio-band switching frequencies |
| Ultra-low shutdown current | 10nA typical leakage ensures battery-powered systems retain charge over extended idle periods |
Applications
| AMOLED Display Power | CCD Image Sensor Bias |
|---|---|
Use Scenario: Generating precise ±12V rails for OLED source driver ICs and gate drivers in portable displays. IC Role / Device Role / Timing Role: Dual-rail DC/DC converter providing regulated, low-ripple, sequenced outputs synchronized to display enable timing. Use Value: Eliminates discrete charge pumps and LDOs, reducing BOM count by 7+ components while maintaining <0.1% line/load regulation. |
Use Scenario: Supplying bias voltages to CCD analog front-end circuits requiring matched positive/negative rails. IC Role / Device Role / Timing Role: Fixed-output dual converter delivering stable ±12V with simultaneous startup to prevent sensor latch-up. Use Value: Achieves <±1.5mV output drift over –40°C to +85°C, enabling sub-16-bit analog signal integrity without trimming. |
| Industrial Instrumentation | Medical Imaging Front-End |
Use Scenario: Powering precision op-amp stages and ADC drivers in portable test equipment. IC Role / Device Role / Timing Role: Dual-rail supply with output disconnect ensuring clean power cycling between measurement cycles. Use Value: 325μA quiescent current extends battery life >200 hours in handheld multimeters with 2000mAh cells. |
Use Scenario: Providing isolated ±12V for photodiode transimpedance amplifiers and analog signal chains in ultrasound modules. IC Role / Device Role / Timing Role: Regulated dual supply with fast power-down discharge preventing signal corruption during standby transitions. Use Value: Active discharge sinks 4.2mA from VOUTN, reducing rail collapse time from >100ms to <15ms - critical for real-time imaging frame sync. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3582EUD-5#TRPBF | Factory-programmed for ±5V outputs; identical pinout, package, and feature set | Used where lower-voltage dual rails are required (e.g., CMOS image sensors, low-voltage op-amps) | Select when system requires ±5V instead of ±12V - no layout change needed |
| MAX17504ATP+T | Single-channel synchronous step-down controller; requires external FETs, inductors, and feedback network | Supports higher output current (up to 12A) but lacks integrated inverting channel and fixed ±12V configuration | Choose for high-current, programmable designs where flexibility outweighs integration and footprint benefits |
Compared with LT3582EUD-5#TRPBF, the LT3582EUD-12#TRPBF delivers higher output voltage with identical sequencing, discharge, and thermal behavior - making it optimal for high-voltage display and sensor bias. Versus MAX17504ATP+T, it trades configurability for integration, reducing design cycle time and component count by eliminating 12+ external parts.
Availability
LT3582EUD-12#TRPBF is available at Aetrix Electronics and suitable for AMOLED display power, CCD imaging bias, and industrial instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for LT3582EUD-12#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3582 product line was designed specifically for compact, high-efficiency dual-rail power conversion in space-constrained portable electronics - emphasizing integration, low quiescent current, and factory-configurable reliability.
FAQ
Is the LT3582EUD-12#TRPBF pin-compatible with other variants in the LT3582 family?
Yes, the LT3582EUD-12#TRPBF shares identical 16-pin 3mm × 3mm QFN packaging and pinout with LT3582EUD#TRPBF and LT3582EUD-5#TRPBF. All variants use the same footprint, thermal pad layout, and external component requirements - enabling drop-in replacement when ±12V output is required instead of programmable or ±5V configurations.
Does the LT3582EUD-12#TRPBF support I²C communication?
The LT3582EUD-12#TRPBF includes I²C interface pins (SDA, SCL, CA), but its OTP memory is factory-locked with PUSEQ=11, PDDIS=1, and ±12V settings - rendering the I²C interface functionally inactive. While the pins meet I²C electrical specifications, no register writes or reads affect operation; unused pins should be tied to GND or VIN per datasheet guidance.
What is the maximum continuous output current per rail for the LT3582EUD-12#TRPBF?
The LT3582EUD-12#TRPBF delivers up to 80mA per rail continuously under typical conditions (TA = 25°C, 5V input), limited by thermal dissipation in the 3mm × 3mm QFN package. The boost switch supports 350mA peak current and the inverting switch supports 600mA peak, but sustained output is constrained by junction temperature rise - derating to ~60mA per rail is recommended at 85°C ambient.
Can the LT3582EUD-12#TRPBF be used with input voltages below 2.55V?
No - the absolute minimum operating input voltage for the LT3582EUD-12#TRPBF is 2.475V (typical) and 2.55V (guaranteed over temperature). Operation below 2.475V risks undervoltage lockout activation, erratic regulation, or failure to start. For sub-2.5V applications, consider the LT3582EUD#TRPBF with I²C programmability and lower VIN headroom optimization.
How does the power-down discharge feature behave on the LT3582EUD-12#TRPBF?
The LT3582EUD-12#TRPBF has power-down discharge permanently enabled (PDDIS = 1). When SHDN is pulled low, internal transistors actively sink 2.4–4.8mA from VOUTP and –1.4 to –4.2mA from VOUTN, discharging output capacitors rapidly. This ensures VOUTP falls below 1V within 15ms and VOUTN rises above –1V within the same timeframe - critical for avoiding latch-up in downstream analog circuitry.
LT3582EUD-12#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive and Negative (Dual Rail)
- Topology:
- Boost, Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.55V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- ±12V
- Voltage - Output (Max):
- -
- Current - Output:
- 285mA (Switch), 490mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LT3582EUD-12#TRPBF FAQ
1.How can I place an order for LT3582EUD-12#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3582EUD-12#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 LT3582EUD-12#TRPBF reliable?
The price and inventory of LT3582EUD-12#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3582EUD-12#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3582EUD-12#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3582EUD-12#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3582EUD-12#TRPBF?
LT3582EUD-12#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3582EUD-12#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 LT3582EUD-12#TRPBF?
For technical support, including LT3582EUD-12#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3582EUD-12#TRPBF requirements.
6.How does Aetrix verify that LT3582EUD-12#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3582EUD-12#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 LT3582EUD-12#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3582EUD-12#TRPBF?
All LT3582EUD-12#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3582EUD-12#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 LT3582EUD-12#TRPBF part is unused and in its original packaging.
Return procedure for LT3582EUD-12#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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