Analog Devices Inc. LTC6992CDCB-4#TRMPBF

Overview

LTC6992CDCB-4#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 5% to 100% programmable duty cycle range, operates from 2.25V to 5.5V supply, achieves ±1.7% max frequency error over temperature, and supports output frequencies from 3.81Hz to 1MHz - ideal for LED dimming and heater control in industrial sensor modules.

For engineers reviewing the LTC6992CDCB-4#TRMPBF datasheet, LTC6992CDCB-4#TRMPBF pinout, LTC6992CDCB-4#TRMPBF application, or LTC6992CDCB-4#TRMPBF equivalent, this page provides verified package mapping (6-lead DFN, 2mm × 3mm), confirmed MOD/SET/DIV pin functions, duty-cycle clamping behavior at 5%/100%, and validated alternatives for automotive-grade thermal management systems.

Technical Context

The LTC6992CDCB-4#TRMPBF implements a master oscillator with 1MHz base frequency, internally divided by NDIV = 1, 4, 16, 64, 256, 1024, 4096, or 16384 per DIV pin voltage. 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 between 0.1×VSET and 0.9×VSET (≈100mV–900mV); outside this range, LTC6992CDCB-4#TRMPBF clamps output at 5% minimum or 100% maximum duty cycle. The device features CMOS output capable of sourcing/sinking 20mA and exhibits <3.7% PWM duty cycle error across its operating temperature range (0°C to 70°C).

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 3mm) plastic DFN (DCB), exposed pad (Pin 7) connected to GND. Low-profile 1mm height suitable for space-constrained PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6992CDCB-4#TRMPBF, the LTC6992IDCB-4#TRPBF extends thermal reliability for field-deployed equipment, while the LTC6992HDCB-4#TRMPBF adds automotive-grade robustness - both retain identical RSET-based frequency programming, MOD pin linearity, and 5%–100% duty cycle clamping behavior.

Availability

LTC6992CDCB-4#TRMPBF is available at Aetrix Electronics and suitable for LED dimming control, heater control, PWM servo loops, and high-vibration environment applications requiring stable component supply and commercial-temperature-grade timing precision.

Supply support for LTC6992CDCB-4#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, communications, automotive, and healthcare markets.

The LTC6992CDCB-4#TRMPBF belongs to the TimerBlox family - silicon timing devices engineered for simplicity, precision, and analog configurability in space- and power-constrained embedded systems.

FAQ

What is the exact duty cycle range supported by the LTC6992CDCB-4#TRMPBF?

The LTC6992CDCB-4#TRMPBF supports a guaranteed 5% minimum to 100% maximum duty cycle range. When the MOD pin voltage falls below 0.1×VSET (~100mV), output clamps at 5%; when above 0.9×VSET (~900mV), it reaches 100%. This eliminates oscillation stoppage seen in LTC6992-1/-3 variants, making LTC6992CDCB-4#TRMPBF ideal for heater control where zero-duty-cycle shutdown is undesirable.

How do I set the output frequency of the LTC6992CDCB-4#TRMPBF?

Set the output frequency of the LTC6992CDCB-4#TRMPBF using a single resistor (RSET) between the SET pin and GND. With RSET = 50kΩ–800kΩ and DIV pin configured for NDIV = 1–16384, fOUT = 1MHz × 50kΩ / (NDIV × RSET). For example, RSET = 200kΩ and NDIV = 1 yields ~250Hz; same RSET with NDIV = 64 gives ~3.9Hz. VSET is internally regulated to 1.00V, so RSET tolerance dominates frequency accuracy.

Does the LTC6992CDCB-4#TRMPBF require external components for basic operation?

Yes - the LTC6992CDCB-4#TRMPBF requires three minimal external components for full functionality: a 0.1µF ceramic capacitor from V+ to GND (bypass), an RSET resistor from SET to GND (frequency setting), and a resistor divider on the DIV pin (divider ratio selection). No external clock or crystal is needed; all timing is generated internally. The MOD pin accepts a clean DC voltage (100mV–900mV) directly from a DAC or potentiometer.

What is the operating temperature specification for the LTC6992CDCB-4#TRMPBF?

The LTC6992CDCB-4#TRMPBF is specified for 0°C to 70°C operating temperature range (Commercial grade). While the part is characterized from –40°C to 85°C, only parameters tested and guaranteed within 0°C to 70°C are covered by Analog Devices' production test flow. For designs requiring guaranteed performance below 0°C or above 70°C, LTC6992IDCB-4#TRPBF (–40°C to 85°C) or LTC6992HDCB-4#TRMPBF (–40°C to 125°C) should be selected instead of LTC6992CDCB-4#TRMPBF.

Can the LTC6992CDCB-4#TRMPBF drive an LED directly?

Yes - the LTC6992CDCB-4#TRMPBF can drive an LED directly via its CMOS output (Pin 6), which sources/sinks up to ±20mA. For a typical 20mA red LED with 1.8V forward voltage at 3.3V supply, a series current-limiting resistor of ~75Ω is recommended. Ensure PCB layout minimizes trace inductance and uses the exposed GND pad for thermal stability. Do not exceed 20mA sink/source to avoid exceeding absolute maximum ratings.