Analog Devices Inc. ADP3041ARU-REEL

Overview

ADP3041ARU-REEL from Analog Devices is a fixed-frequency PWM boost DC-DC switching regulator with integrated 1.5 A power switch and five rail-to-rail gamma/VCOM buffers, delivering up to 12 V output from 2.5–5.5 V input in a TSSOP-20 package. It achieves 90% efficiency, ±3% output regulation accuracy, and 600 kHz switching frequency for compact TFT LCD bias supplies.

For engineers reviewing the ADP3041ARU-REEL datasheet, ADP3041ARU-REEL pinout, ADP3041ARU-REEL application, or ADP3041ARU-REEL equivalent, key selection criteria include its integrated gamma buffer drive (35 mA per channel), current-mode control architecture, soft-start timing via external capacitor, undervoltage lockout threshold (2.4 V typ), and TSSOP-20 thermal performance (JA = 112°C/W, 4-layer).

Technical Context

The ADP3041ARU-REEL implements current-mode PWM control with internal ramp generation synchronized to a 600 kHz oscillator and peak current limiting at 1.5 A. Its error amplifier features 100 µA/V transconductance and 1000 V/V gain, driving a comparator that sets duty cycle via flip-flop timing-enabling stable regulation across 4.5–12 V output range despite input (2.5–5.5 V) and load variations.

Five independent buffers each provide rail-to-rail input/output operation, 35 mA continuous output current, and <0.01% gain linearity over temperature. Input offset voltage is 2–10 mV, PSRR is 70–90 dB, and slew rate is 4.5–8 V/µs into 10 kΩ//200 pF-optimized for gamma correction and VCOM drive in active-matrix LCD panels.

Key Specifications

Pinout & Package

TSSOP-20 (4.4 mm × 6.5 mm, 0.65 mm pitch), thermally enhanced with separate PGND and AGND pins to isolate power-switch noise from analog feedback paths.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TFT LCD bias and gamma buffer applications.

Compared with TPS65105RGER and MAX17105ETL+, the ADP3041ARU-REEL uniquely integrates full 5-channel (G1–G4 + VCOM) drive with 600 kHz switching in TSSOP-20-offering optimal balance of integration, thermal performance, and layout simplicity for mid-size TFT panels.

Availability

ADP3041ARU-REEL is available at Aetrix Electronics and suitable for TFT LCD bias supplies, gamma correction systems, VCOM drivers, and portable display power management requiring stable component supply and long-term industrial availability.

Supply support for ADP3041ARU-REEL 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 precision instrumentation, industrial automation, communications, and automotive markets.

The ADP3041ARU-REEL belongs to Analog Devices' TFT LCD power management product line, engineered specifically to integrate boost conversion and gamma/VCOM buffering for cost-sensitive, space-constrained display modules.

FAQ

What is the maximum output voltage supported by the ADP3041ARU-REEL?

The ADP3041ARU-REEL supports an adjustable output voltage range from 4.5 V to 12 V, set by an external resistor divider on the FB pin. The internal feedback reference is 1.233 V (±1.8 mV), enabling precise regulation across this range. Operation above 12 V is not supported due to absolute maximum SW pin rating of 14 V and internal circuit limitations.

How does the ADP3041ARU-REEL handle startup inrush current?

The ADP3041ARU-REEL implements controlled startup via its SS (soft-start) pin, which sources a 2.5 µA current to charge an external capacitor. As the SS voltage ramps, it gradually releases the COMP node from clamping, limiting initial duty cycle and preventing excessive inrush into large panel capacitance. This avoids input supply droop and stress on the external diode and inductor.

Can the ADP3041ARU-REEL operate with a 2.5 V input supply?

Yes, the ADP3041ARU-REEL is fully specified to operate from 2.5 V to 5.5 V input. At 2.5 V input, it can still generate regulated 4.5–12 V outputs, though maximum achievable output voltage decreases as VIN approaches the lower limit due to duty cycle constraints and switch RDS(ON) losses. UVLO remains active down to 2.2 V to prevent unstable operation.

What is the purpose of separate PGND and AGND pins on the ADP3041ARU-REEL?

The ADP3041ARU-REEL uses separate PGND (Pin 20) and AGND (Pin 19) pins to isolate high-current power-switch return paths from sensitive analog ground references. PGND carries pulsed inductor current and must connect directly to the input capacitor negative terminal and power inductor ground. AGND serves as the quiet reference for FB, COMP, and buffer circuits-ensuring accurate feedback and low-noise analog performance.

Does the ADP3041ARU-REEL require external compensation components?

Yes, the ADP3041ARU-REEL requires external RC compensation connected between the COMP pin and AGND to stabilize the voltage feedback loop. Typical values are RC = 10–100 kΩ and CC = 100 pF–1 nF, selected based on output voltage, load, and inductor value to counteract the right-half-plane zero inherent in boost topology and ensure phase margin ≥65°.