Analog Devices Inc. LTC3832-1ES8#TRPBF

Overview

LTC3832-1ES8#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, synchronous step-down DC/DC controller optimized for 3.3V–5V input to 0.6V–3.xV output conversion in CPU and logic supply applications. It features ±1% output regulation over line/load/temperature, >91% max duty cycle, all-N-channel MOSFET support, and operates from 3V to 8V input. The device delivers up to 9A output current in typical implementations like 3.3V-to-1V power converters.

For engineers reviewing the LTC3832-1ES8#TRPBF datasheet, LTC3832-1ES8#TRPBF pinout, LTC3832-1ES8#TRPBF application, or LTC3832-1ES8#TRPBF equivalent, key selection criteria include its SO-8 package, absence of current limit/shutdown/frequency adjustment functions (vs. LTC3832), fixed 300kHz oscillator, and use of VCC/PVCC2 shared rail - critical for layout, thermal management, and system-level fault response design.

Technical Context

The LTC3832-1ES8#TRPBF implements voltage-mode PWM control with a precision 0.6V internal reference and transconductance error amplifier (AV = 50–65dB, gm = 1600–2400µmho). Its feedback loop uses direct sensing at FB with no internal resistor divider - requiring external resistive setting for non-2.5V outputs.

It integrates dual N-channel gate drivers (G1/G2) with 80–250ns rise/fall times and 25–250ns nonoverlap timing, operating from PVCC1 (≥VIN + 2.5V) and shared VCC/PVCC2 (5V–14V). Thermal shutdown activates at 150°C junction temperature, with recovery at 125°C.

Key Specifications

Pinout & Package

Package: 8-lead plastic SO (SO-8), 130°C/W junction-to-ambient thermal resistance, JEDEC MS-012AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck controller applications.

Compared with MP2315DJ-LF-Z and LTC3833EGN#PBF, the LTC3832-1ES8#TRPBF trades off feature set for simplicity and thermal headroom - its SO-8 package and absence of integrated functions allow higher current designs with discrete MOSFETs and custom gate drive optimization.

Availability

LTC3832-1ES8#TRPBF is available at Aetrix Electronics and suitable for CPU power supplies, FPGA I/O regulators, and industrial PLC logic rails requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC3832-1ES8#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving industrial, automotive, communications, and computing markets.

The LTC3832 family was designed specifically for high-efficiency, high-current synchronous buck conversion in low-voltage digital systems - emphasizing precision regulation, thermal resilience, and MOSFET gate drive robustness.

FAQ

What is the primary function of the LTC3832-1ES8#TRPBF in a power supply design?

The LTC3832-1ES8#TRPBF serves as a synchronous step-down DC/DC controller that regulates output voltage by driving external N-channel MOSFETs in a buck topology. Unlike monolithic converters, it does not integrate power switches - instead, it provides precision voltage-mode PWM control, gate drive outputs (G1/G2), and feedback management for high-current, low-voltage applications such as CPU core supplies. Its design centers on efficiency, thermal safety, and layout flexibility.

Does the LTC3832-1ES8#TRPBF support current limiting or shutdown functionality?

No, the LTC3832-1ES8#TRPBF explicitly omits current limit, shutdown, frequency adjustment, and external clock synchronization functions - these are present in the LTC3832 but disabled in the -1 variant. The LTC3832-1ES8#TRPBF retains only soft-start and thermal shutdown. To disable the device, VIN must be removed or an external MOSFET switch inserted in the input path.

How is output voltage set on the LTC3832-1ES8#TRPBF given that it lacks an internal resistor divider?

The LTC3832-1ES8#TRPBF has no internal resistor divider; output voltage is set exclusively via an external resistive divider connected to the FB pin. The device compares the divided voltage to its 0.6V internal reference. For example, a 2.5V output requires R1 = 31.6kΩ and R2 = 10kΩ (VOUT = 0.6V × (1 + R1/R2)). SENSE+ and SENSE– pins are unused and must remain unconnected in LTC3832-1ES8#TRPBF designs.

What are the critical layout considerations for the PVCC1 and VCC/PVCC2 pins on the LTC3832-1ES8#TRPBF?

PVCC1 must be routed with low-inductance, high-current capability and decoupled with ≥10µF near the pin, as it powers the top gate driver and must exceed VIN by ≥2.5V. VCC/PVCC2 is a shared rail supplying both internal circuitry and the bottom gate driver - it requires a 10µF low-ESR ceramic capacitor directly at the pin and careful separation from noisy power planes to prevent regulation error. Both rails demand Kelvin connections to minimize ground shift effects.

Can the LTC3832-1ES8#TRPBF be used in place of the LTC3832 in an existing design?

Direct substitution of LTC3832-1ES8#TRPBF for LTC3832 is not recommended without circuit revision. The LTC3832-1ES8#TRPBF lacks SHDN, FREQSET, IMAX, IFB, and SENSE+/– pins - their associated components (resistors, capacitors, noise filters) must be removed. Additionally, PVCC2 and VCC are internally tied, so the external VCC bypass must be upgraded to 10µF, and the PVCC1 charge pump must still meet ≥VIN + 2.5V requirements for full-duty-cycle operation.