Analog Devices Inc. LTC6992HDCB-3#TRMPBF

Overview

LTC6992HDCB-3#TRMPBF from Analog Devices is a voltage-controlled pulse width modulator (PWM) IC in the TimerBlox family, designed for precision analog duty-cycle control. It delivers 0% to 95% programmable duty cycle range, operates from 2.25V to 5.5V supply, supports output frequencies from 3.81Hz to 1MHz via RSET and DIV pin configuration, and features ±1.7% max frequency error over temperature - used in LED dimming, heater control, and servo loops requiring stable PWM timing.

For engineers reviewing the LTC6992HDCB-3#TRMPBF datasheet, LTC6992HDCB-3#TRMPBF pinout, LTC6992HDCB-3#TRMPBF application, or LTC6992HDCB-3#TRMPBF equivalent, this page provides verified package mapping (6-lead DFN, 2mm × 3mm), confirmed –40°C to 125°C operating range, MOD pin analog input (0.1•VSET to 0.9•VSET), and exact NDIV divider settings (1–16384) tied to the LTC6992-3 variant.

Technical Context

The LTC6992HDCB-3#TRMPBF implements a master oscillator with fixed 1MHz reference scaled by ISET current (set via RSET), followed by an internal 4-bit A/D converter on the DIV pin that selects NDIV = {1, 4, 16, 64, 256, 1024, 4096, 16384}. Its PWM generation uses a voltage-limited linear transfer function where duty cycle = (VMOD(LIM) − 0.1•VSET)/0.8•VSET, clamped at 0% min / 95% max per LTC6992-3 specification.

VSET is internally regulated to 1.00V ±30mV across temperature, enabling RSET-based frequency programming independent of VSET drift. The CMOS output driver sources/sinks ±20mA with <500µs start-up time and supports polarity inversion via the MSB (POL) of DIVCODE - critical for closed-loop systems requiring phase-reversal capability.

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 3mm) plastic DFN (DCB), exposed pad (Pin 7) connected to GND. RoHS-compliant, lead-free finish, optimized for thermal dissipation in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-controlled PWM applications.

Compared with LTC6992HDCB-2#TRMPBF and LTC6992HDCB-4#TRMPBF, the LTC6992HDCB-3#TRMPBF uniquely supports true 0% duty cycle (full-off) while limiting maximum to 95%, making it optimal for applications demanding fail-safe shutdown without risking thermal saturation at full conduction.

Availability

LTC6992HDCB-3#TRMPBF is available at Aetrix Electronics and suitable for LED dimming control, heater thermal regulation, and PWM servo loops requiring stable component supply across automotive, industrial, and portable equipment designs.

Supply support for LTC6992HDCB-3#TRMPBF 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.

The LTC6992HDCB-3#TRMPBF belongs to the TimerBlox family - silicon timing devices engineered for simplicity, precision, and robustness in analog-controlled timing applications where microcontroller-based solutions add complexity or reliability risk.

FAQ

What is the duty cycle range of the LTC6992HDCB-3#TRMPBF?

The LTC6992HDCB-3#TRMPBF has a guaranteed duty cycle range of 0% to 95%. This means it can produce a fully off output (0% conduction) and cap maximum conduction at 95%, which is distinct from other variants like LTC6992-1 (0–100%) or LTC6992-2 (5–95%). The clamping behavior is inherent to the LTC6992-3 version and applies across its full operating temperature range of –40°C to 125°C.

How is the output frequency programmed on the LTC6992HDCB-3#TRMPBF?

The LTC6992HDCB-3#TRMPBF output frequency is set using two elements: a resistor (RSET) connected between the SET pin and GND determines the master oscillator frequency, and a resistor divider on the DIV pin selects the division ratio (NDIV). With RSET = 50kΩ–800kΩ and NDIV = {1, 4, 16, ..., 16384}, the final fOUT = 1MHz × 50kΩ / (NDIV × RSET). The LTC6992HDCB-3#TRMPBF's datasheet specifies ±1.7% max frequency error over temperature when using this method.

Does the LTC6992HDCB-3#TRMPBF require external clocking or crystal components?

No, the LTC6992HDCB-3#TRMPBF is a self-contained silicon oscillator and does not require any external clock source, crystal, or resonator. Its timing core is fully integrated, relying only on the RSET resistor and DIV pin voltage divider for configuration. This eliminates board space, cost, and reliability concerns associated with external timing components - a key advantage of the TimerBlox architecture embodied in the LTC6992HDCB-3#TRMPBF.

What package type and footprint does the LTC6992HDCB-3#TRMPBF use?

The LTC6992HDCB-3#TRMPBF uses a 6-lead plastic DFN package (DCB), measuring 2mm × 3mm with 0.5mm pitch and an exposed thermal pad (Pin 7, GND). This compact, low-profile (1mm height) package is RoHS-compliant and optimized for automated assembly and thermal performance in dense PCB layouts. It is not pin-compatible with the TSOT-23 variant (S6 package), and layout must follow Analog Devices' recommended pad geometry and solder mask design for the DCB footprint.

Is the LTC6992HDCB-3#TRMPBF qualified for automotive applications?

Yes, the LTC6992HDCB-3#TRMPBF carries H-grade qualification with guaranteed operation from –40°C to 125°C and is AEC-Q100 qualified for automotive applications. Its specifications - including ±1.7% frequency accuracy, 105–450µA supply current, and 0%–95% duty cycle clamping - are fully characterized and tested across this extended temperature range, making it suitable for under-hood and cabin electronics where reliability under thermal stress is mandatory.