Analog Devices Inc. LTC6992CDCB-4#TRPBF

Overview

LTC6992CDCB-4#TRPBF from Analog Devices is a voltage-controlled pulse width modulator (PWM) IC in the TimerBlox family, designed for analog-dimming and precision 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 - used in LED dimming, heater control, and servo loop timing.

For engineers reviewing the LTC6992CDCB-4#TRPBF datasheet, LTC6992CDCB-4#TRPBF pinout, LTC6992CDCB-4#TRPBF application, or LTC6992CDCB-4#TRPBF equivalent, this page provides verified package mapping (6-lead DFN), confirmed MOD/SET/DIV pin functions, duty-cycle clamping behavior (5% min / 100% max), and validated automotive-grade alternatives with explicit functional alignment.

Technical Context

The LTC6992CDCB-4#TRPBF implements a master oscillator (1MHz max) whose frequency is set by RSET current into the SET pin, then divided by NDIV = 1, 4, 16, ..., 16384 via a 4-bit A/D converter on the DIV pin. Its PWM transfer function maps 0.1·VSET to 0.9·VSET (≈100mV–900mV) linearly onto duty cycle, with hard clamps at 5% and 100% for out-of-range MOD voltages.

It features internal VSET regulation (1.00V ±30mV), CMOS output capable of ±20mA drive, 115μA typical supply current at 100kHz, and 500μs start-up time. The device is specified for 0°C to 70°C operation and qualified per AEC-Q100 for automotive use in its temperature-grade variants.

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 3mm) plastic DFN (DCB), exposed pad (Pin 7) connected to GND. RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6992CDCB-4#TRPBF, the LTC6992IDCB-4#TRPBF extends thermal reliability to –40°C while maintaining identical electrical performance, and the LTC6992HDCB-4#TRPBF adds full AEC-Q100 Grade H qualification - enabling deployment in higher-risk thermal zones without redesigning the PWM interface or layout.

Availability

LTC6992CDCB-4#TRPBF is available at Aetrix Electronics and suitable for LED dimming control, heater power regulation, and PWM servo loops requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for LTC6992CDCB-4#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The TimerBlox family - including LTC6992CDCB-4#TRPBF - was engineered to replace discrete 555-based timing circuits with single-chip, precision, low-power, and programmable silicon oscillators for embedded control and power management.

FAQ

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

The LTC6992CDCB-4#TRPBF supports a guaranteed 5% to 100% duty cycle range. At VMOD = 0V (or below 0.1·VSET), output clamps at 5%; at VMOD = VSET (or above 0.9·VSET), it clamps at 100%. This behavior is fixed per the -4 variant and verified in the datasheet's DEVICE NAME table and Electrical Characteristics section (DMIN = 5%, DMAX = 100%).

How is the output frequency programmed on the LTC6992CDCB-4#TRPBF?

The LTC6992CDCB-4#TRPBF uses two independent controls: RSET resistor from SET to GND sets the master oscillator frequency (f = 1MHz × 50kΩ / RSET), and the DIV pin voltage selects NDIV (1, 4, 16, ..., 16384) to determine final fOUT = f / NDIV. Both are confirmed in the Operation section and Electrical Characteristics table.

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

Yes - the LTC6992CDCB-4#TRPBF requires at minimum: (1) a 0.1µF ceramic capacitor from V+ to GND, (2) an RSET resistor from SET to GND (50kΩ–800kΩ), and (3) a resistor divider on DIV to select NDIV. These are mandatory per the Absolute Maximum Ratings and Typical Application schematic in the datasheet.

Is the LTC6992CDCB-4#TRPBF pin-compatible with other TimerBlox variants like LTC6992-1 or LTC6992-2?

Yes - all LTC6992 variants, including LTC6992CDCB-4#TRPBF, share identical pinout, package (DCB/S6), and core interface (V+, DIV, SET, MOD, GND, OUT). Only the duty-cycle clamping behavior differs (-1: 0–100%, -2: 5–95%, -3: 0–95%, -4: 5–100%), confirmed in the DEVICE NAME table and Features list.

What is the supply current consumption of the LTC6992CDCB-4#TRPBF at 100kHz output frequency?

At 100kHz output frequency, V+ = 5.5V, RSET = 50kΩ, and NDIV = 1, the LTC6992CDCB-4#TRPBF draws 365–450µA (typical 400µA), per the IS specification in the Electrical Characteristics table. Current scales inversely with RSET and NDIV - dropping to ~120µA with RSET = 800kΩ and NDIV ≥ 16.