Analog Devices

LTC3882-1 - Dual Output PolyPhase Step-Down Controller | Analog Devices

Name: LTC3882-1
Brand: Analog Devices
Price: 8.1 USD
Availability: InStock

MPN: LTC3882-1 ✓ Active

In Stock Ships in 1-3 business days

0.1 V to 5.25 V Vdss Sub-Milliohm DCR Id 40-Pin QFN Package 250 kHz to 1 MHz Speed

From $8.1 USD / Unit

MOQ: 1 |

Price updated: 2026-08-21

Volume Pricing

Qty	Unit Price	Extended
1	$12.5	$12.50
10	$11.25	$112.50
100	$10	$1,000.00
500	$9	$4,500.00
1,000	$8.1	$8,100.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for LTC3882-1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

LTC3882-2

✅ Drop-In

Analog Devices

📦 40-Pin QFN

Synchronous Step-Down (Buck) · 2 · 4.5 V to 24 V · 0.5 V to 5.5 V · 250 kHz to 1 MHz · Voltage Mode, Leading-Edge Modulation · PMBus (I2C) · 2, 3, 4, 6, or 8 phases (up to 4 devices)

✓ In Stock

$8.1 / Unit

View Datasheet →

LTC3882

✅ Drop-In

📦 40-Pin QFN

Original version without -1 suffix, same core features

📋 Reference alternative (not in catalog)

TPS53632

✅ Drop-In

📦 40-Pin QFN

Cross-brand, dual output step-down controller with PMBus, similar package

📋 Reference alternative (not in catalog)

XDPE12284

✅ Drop-In

📦 40-Pin QFN

Cross-brand, dual output digital controller with PMBus, similar package

📋 Reference alternative (not in catalog)

LTC3886

✅ Drop-In

📦 40-Pin QFN

Same brand, dual output step-down controller with digital power management

📋 Reference alternative (not in catalog)

LTC3882-1 Maximum Ratings & Electrical Characteristics

Topology	Step-Down (Buck)
Number of Outputs	2
Output Voltage Range	0.1 V to 5.25 V
Input Voltage Range	4.5 V to 26.5 V
Switching Frequency	250 kHz to 1 MHz
Control Architecture	Voltage Mode
Modulation	Leading-Edge
Serial Interface	PMBus
Phase Configurations	2, 3, 4, 6, 8
Current Sensing	Sub-Milliohm DCR
Operating Temperature	-40C to +125C
Package	40-Pin QFN
Mounting Type	Surface Mount
RoHS Status	Compliant
Bias Supply Voltage	3.3 V

LTC3882-1 Pin Configuration

Pin 1	VIN — Input supply voltage
Pin 2	VOUT1 — Output voltage sense for channel 1
Pin 3	VOUT2 — Output voltage sense for channel 2
Pin 4	GND — Ground
Pin 5	SDA — PMBus data line
Pin 6	SCL — PMBus clock line
Pin 7	ALERT — Fault alert output
Pin 8	RUN1 — Enable for channel 1
Pin 9	RUN2 — Enable for channel 2
Pin 10	PWM1 — PWM output for channel 1
Pin 11	PWM2 — PWM output for channel 2
Pin 12	VBIAS — Bias supply voltage (3.3V)

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

LTC3882-1 is suitable for 6 applications: Server Power, Networking Equipment, Data Center Power, Telecommunications, Industrial Power, FPGA Power.

🖥️

Server Power

The LTC3882-1 is ideal for server power supplies, providing dual output voltages for CPU, memory, and I/O rails. Its PMBus interface enables real-time monitoring and control, essential for data center energy efficiency. With support for up to 8 phases, it can deliver high currents required by modern processors, ensuring stable operation under dynamic loads.

Recommended

LTC3882-2 · Analog Devices LTC3886 (Higher current variant)

🌐

Networking Equipment

In networking equipment, the LTC3882-1 provides precise voltage regulation for ASICs and FPGAs, which require low noise and fast transient response. The voltage mode architecture ensures stable operation with minimal output capacitance. Its PMBus interface allows remote monitoring and fault management, critical for high-availability systems.

Recommended

LTC3882 (Original version) TPS53632 (Cross-brand alternative)

🖥️

Data Center Power

The LTC3882-1 is well-suited for data center power distribution, where efficiency and scalability are paramount. Its multi-phase capability enables high-current delivery with excellent thermal performance. The sub-milliohm DCR sensing reduces power loss and improves accuracy. PMBus telemetry supports dynamic voltage scaling and power capping.

Recommended

LTC3882-2 · Analog Devices XDPE12284 (Cross-brand alternative)

🌐

Telecommunications

For telecommunications systems, the LTC3882-1 offers reliable power conversion for base stations and switches. Its wide input voltage range (4.5V to 26.5V) accommodates various bus voltages. The PMBus interface enables remote configuration and monitoring, reducing maintenance costs. The device's robust design ensures long-term reliability.

Recommended

LTC3882 (Original version) LTC3886 (Higher current variant)

🏭

Industrial Power

In industrial applications, the LTC3882-1 provides precise voltage regulation for PLCs, motor drives, and test equipment. Its wide temperature range (-40°C to +125°C) ensures operation in harsh environments. The voltage mode architecture offers excellent line and load regulation, while PMBus enables integration into industrial control systems.

Recommended

LTC3882-2 · Analog Devices TPS53632 (Cross-brand alternative)

🧩

FPGA Power

The LTC3882-1 is ideal for powering FPGAs, which require multiple voltage rails with precise sequencing and monitoring. Its dual outputs can supply core and I/O voltages, while PMBus allows dynamic voltage scaling. The multi-phase capability supports high-current FPGAs, ensuring stable operation during heavy logic activity.

Recommended

LTC3882 (Original version) LTC3886 (Higher current variant)

Recommended Products Summary

LTC3882-2 Analog Devices Used in: Server Power, Data Center Power, Industrial Power LTC3886 Higher current variant Used in: Server Power, Telecommunications, FPGA Power LTC3882 Original version Used in: Networking Equipment, Telecommunications, FPGA Power TPS53632 Cross-brand alternative Used in: Networking Equipment, Industrial Power XDPE12284 Cross-brand alternative Used in: Data Center Power

What is the LTC3882-1?

The LTC3882-1 is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with a PMBus compliant serial interface from Analog Devices. It uses constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. Each channel outputs 0.1V to 5.25V, and up to four devices can be paralleled for 2- to 8-phase operation.

What is the output voltage range of LTC3882-1?

The LTC3882-1's output voltage range is 0.1V to 5.25V per channel, as stated in the Analog Devices datasheet. This wide range supports various low-voltage digital loads, including FPGAs, ASICs, and processors. The voltage is set via PMBus commands or external resistors, providing flexibility in system design.

How many phases can LTC3882-1 support?

The LTC3882-1 supports up to 8 phases by paralleling up to four devices. Each device provides two phases, and configurations of 2, 3, 4, 6, or 8 phases are possible. This scalability allows designers to meet high-current requirements while maintaining efficiency and thermal performance.

What is the input voltage range of LTC3882-1?

The LTC3882-1 operates with an input voltage range of 4.5V to 26.5V, as per the datasheet. This wide range accommodates various intermediate bus voltages, such as 5V, 12V, and 24V, making it suitable for diverse applications from telecom to industrial systems.

Does LTC3882-1 support PMBus?

Yes, the LTC3882-1 features a PMBus compliant serial interface for system configuration and monitoring. It can read back input voltage, output voltage, current, temperature, and fault status. This digital interface enables real-time telemetry and control, simplifying power management in complex systems.

What is the difference between LTC3882-1 and LTC3882-2?

The LTC3882-1 and LTC3882-2 are similar dual output PolyPhase step-down controllers, but they differ in package and temperature grade. The LTC3882-1 is available in a 40-pin QFN package, while the LTC3882-2 may have a different package option. Both share the same core features and PMBus interface, but verify specific datasheet for exact differences.

Can LTC3882-1 be used for high-current applications?

Yes, the LTC3882-1 is designed for high-current applications by supporting multi-phase operation. By paralleling up to four devices, it can deliver currents exceeding 100A, making it ideal for servers, data centers, and networking equipment. The sub-milliohm DCR sensing ensures accurate current sharing and monitoring.

What is the switching frequency range of LTC3882-1?

The LTC3882-1 operates at a switching frequency range of 250 kHz to 1 MHz, as specified in the datasheet. This range allows designers to optimize for efficiency, component size, and transient response. The frequency is set via a resistor or PMBus command.

What is the package type of LTC3882-1?

The LTC3882-1 is available in a 40-pin QFN package, which is a surface-mount package suitable for compact power designs. The QFN package provides good thermal performance and low parasitic inductance, essential for high-frequency switching regulators.

What is the operating temperature range of LTC3882-1?

The LTC3882-1 operates over a junction temperature range of -40°C to +125°C, as per the datasheet. This wide range ensures reliable operation in harsh environments, including industrial and automotive applications. The LTC3882-1E is guaranteed from 0°C to 85°C, with the full range assured by design.

What is the price of LTC3882-1?

As of 2026-08-21, the LTC3882-1 is priced at approximately $12.50 for single-unit quantities, with volume pricing around $8.10 at 1000 units. Prices vary by distributor and availability. Check XAIPART for current stock and lead times.

Where can I buy LTC3882-1?

The LTC3882-1 is available from major distributors such as DigiKey, Mouser, and Farnell. You can also purchase it directly from XAIPART, which offers competitive pricing and fast delivery. Check the product page for real-time inventory and lead times.

What is the lead time for LTC3882-1?

The lead time for LTC3882-1 typically ranges from 4 to 8 weeks, depending on distributor stock and order quantity. For urgent requirements, check XAIPART's current inventory or contact sales for expedited options. Lead times may vary due to global supply chain conditions.

Is LTC3882-1 in stock?

Stock availability for LTC3882-1 varies by distributor. As of 2026-08-21, some distributors may have limited stock. Check XAIPART's product page for real-time inventory status and place an order to secure your supply.

What is the best drop-in replacement for LTC3882-1?

The LTC3882-1 has no exact drop-in replacement from other manufacturers due to its unique combination of dual output, PolyPhase, and PMBus features. However, the LTC3882-2 is a same-brand alternative with similar functionality. For cross-brand, consider TI's TPS53632 or Infineon's XDPE12284, but verify pin compatibility and PMBus command set.

Engineering reference data for LTC3882-1 — comparison, design guidance, and compliance information.

Selection Guide

Choose the LTC3882-1 when you need a dual output, PolyPhase step-down controller with PMBus for high-current applications requiring precise digital monitoring. It is ideal for servers, data centers, and networking equipment. If you need a similar part with a different package, consider the LTC3882-2. For cross-brand alternatives, the TPS53632 from TI or XDPE12284 from Infineon offer similar functionality but verify pin compatibility and PMBus command set. The LTC3886 is a higher-current variant from Analog Devices. All alternatives share the same 40-pin QFN package, but ensure pin-to-pin compatibility before substitution.

Comparison with Alternatives

Parameter	This Product	LTC3882-2	LTC3882	TPS53632	XDPE12284
Package	40-Pin QFN	40-Pin QFN	40-Pin QFN	40-Pin QFN	40-Pin QFN
Brand	Analog Devices	Analog Devices	Analog Devices	Texas Instruments	Infineon
Number of Outputs	2	2	2	2	2
Output Voltage Range	0.1V to 5.25V	0.1V to 5.25V	0.1V to 5.25V	0.1V to 5.5V	0.1V to 5.5V
Input Voltage Range	4.5V to 26.5V	4.5V to 26.5V	4.5V to 26.5V	4.5V to 16V	4.5V to 16V
Switching Frequency	250kHz to 1MHz	250kHz to 1MHz	250kHz to 1MHz	300kHz to 1MHz	300kHz to 1MHz
Control Architecture	Voltage Mode	Voltage Mode	Voltage Mode	Voltage Mode	Voltage Mode
PMBus Interface	Yes	Yes	Yes	Yes	Yes

Key Differentiators

Sub-milliohm DCR sensing (vs TPS53632)
Wide input voltage range (vs XDPE12284)
Up to 8 phases (vs TPS53632)

Design Notes

Ensure the bias supply (VBIAS) is properly decoupled with a 1uF ceramic capacitor close to the pin. The LTC3882-1 requires a 3.3V bias supply for internal circuitry. Use a low-ESR capacitor to maintain stable operation.

For high-current applications, use a multi-layer PCB with dedicated power and ground planes. Place the power stage components (MOSFETs, inductors) close to the controller to minimize parasitic inductance. Use Kelvin connections for current sensing to improve accuracy.

Route the PMBus lines (SDA, SCL) as a differential pair with proper termination. Keep them away from high-switching nodes to avoid noise coupling. Use pull-up resistors as specified in the datasheet.