Analog Devices Inc. LTC6992HS6-2#WTRPBF

Overview

LTC6992HS6-2#WTRPBF from Analog Devices is a voltage-controlled pulse width modulator (PWM) IC in the TimerBlox family, designed for precision analog duty-cycle control in automotive-grade timing applications. It delivers 5% to 95% programmable duty cycle range, operates from 2.25V to 5.5V supply, supports output frequencies from 3.81Hz to 1MHz, and features ±1.7% max frequency error over –40°C to 125°C.

For engineers reviewing the LTC6992HS6-2#WTRPBF datasheet, LTC6992HS6-2#WTRPBF pinout, LTC6992HS6-2#WTRPBF application, or LTC6992HS6-2#WTRPBF equivalent, this device serves as a compact, AEC-Q100 qualified solution for closed-loop PWM control where duty-cycle linearity, low supply current (105–450µA), and temperature-stable frequency accuracy are critical.

Technical Context

The LTC6992HS6-2#WTRPBF integrates a master oscillator with 1MHz reference, a programmable divider (NDIV = 1, 4, 16…16384), and a 4-bit A/D converter on the DIV pin to set both division ratio and polarity. Its SET pin regulates VSET to 1.00V ±30mV, enabling frequency programming via RSET (50kΩ–800kΩ) with fOUT = 1MHz × 50kΩ / (NDIV × RSET).

Duty cycle is linearly controlled by VMOD input (0.1×VSET to 0.9×VSET), clamped at 5% min / 95% max per its -2 variant designation. The CMOS output sources/sinks 20mA, starts up in 500µs, and maintains <3.7% PWM duty cycle error across temperature and supply variations.

Key Specifications

Pinout & Package

Package: 6-Lead Plastic TSOT-23 (S6), 1mm profile, lead-free, RoHS-compliant, AEC-Q100 qualified for automotive use.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6992IS6-2#TRPBF, the LTC6992HS6-2#WTRPBF adds AEC-Q100 qualification and extended 125°C operation-critical for engine bay placement-while TLV3402IPW demands external components and lacks guaranteed duty-cycle accuracy or temperature stability.

Availability

LTC6992HS6-2#WTRPBF is available at Aetrix Electronics and suitable for automotive engine control, LED headlamp dimming, industrial heater regulation, and portable medical pump drive applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6992HS6-2#WTRPBF 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC6992HS6-2#WTRPBF belongs to the TimerBlox family-designed specifically for replacing discrete timing circuits with single-chip, resistor-programmable oscillators offering analog voltage control, automotive qualification, and minimal external components.

FAQ

What is the exact duty cycle range supported by the LTC6992HS6-2#WTRPBF?

The LTC6992HS6-2#WTRPBF is the -2 variant of the TimerBlox family and supports a precisely clamped 5% to 95% duty cycle range. This is enforced by internal circuitry that limits output at VMOD = 0.1×VSET (5%) and VMOD = 0.9×VSET (95%), preventing full-on or full-off states-ideal for applications like heater control where thermal runaway must be avoided. The LTC6992HS6-2#WTRPBF does not support 0% or 100% duty cycles.

How is the output frequency programmed on the LTC6992HS6-2#WTRPBF?

The LTC6992HS6-2#WTRPBF uses a single external resistor (RSET) connected between the SET pin and GND to program output frequency. With VSET internally regulated to 1.00V, ISET = 1V/RSET determines the master oscillator frequency: fOUT = 1MHz × 50kΩ / (NDIV × RSET). RSET values from 50kΩ to 800kΩ yield frequencies from 3.81Hz to 1MHz, and NDIV is selected via the DIV pin's resistor divider to scale further.

Does the LTC6992HS6-2#WTRPBF require external capacitors for stable operation?

The LTC6992HS6-2#WTRPBF requires only a 0.1µF ceramic capacitor between V+ and GND, placed as close as possible to the pins, to suppress supply noise and ensure low-jitter operation. No timing capacitor is needed-the oscillator is fully resistor-programmed. Capacitance on the SET and DIV pins must be limited to <10pF and <100pF respectively to maintain stability and accurate A/D conversion, per the datasheet layout guidelines.

Is the LTC6992HS6-2#WTRPBF pin-compatible with other TimerBlox variants like LTC6992HS6-1#WTRPBF?

Yes, the LTC6992HS6-2#WTRPBF is pin-compatible with all S6-package TimerBlox variants (e.g., LTC6992HS6-1#WTRPBF, LTC6992HS6-3#WTRPBF), sharing identical pinout, package dimensions, and electrical interface. Only the duty cycle range differs: -1 supports 0–100%, -2 supports 5–95%, -3 supports 0–95%, and -4 supports 5–100%. No PCB changes are required when substituting within the same package grade.

What automotive qualification does the LTC6992HS6-2#WTRPBF hold?

The LTC6992HS6-2#WTRPBF is AEC-Q100 qualified for automotive applications, specifically rated for operation from –40°C to +125°C (H-grade temperature range). It undergoes stress testing including HTOL, TC, UHAST, and ESD per AEC-Q100 Rev H, and is designated with the #W suffix indicating controlled manufacturing for automotive reliability. This makes it suitable for under-hood and safety-critical subsystems where standard industrial parts are insufficient.