Renesas ICL7667CBA-T

Overview

ICL7667CBA-T from Intersil is a dual monolithic high-speed power MOSFET driver IC designed to convert TTL-level inputs into high-current, rail-to-rail outputs up to 15V. It delivers 30ns rise/fall times into 1000pF loads, features 7Ω typical output resistance, and operates across a +4.5V to +15V V+ supply with V− grounded or at −15V - enabling efficient gate driving in high-frequency switched-mode power supplies.

For engineers reviewing the ICL7667CBA-T datasheet, ICL7667CBA-T pinout, ICL7667CBA-T application, or ICL7667CBA-T equivalent, key selection criteria include its TTL/CMOS-compatible inputs, dual inverting buffer architecture, low propagation delay (≤50ns), millivolt-level output voltage swing (VOH = V+ − 0.05V, VOL = 0.05V), and SOIC-8 package suitability for space-constrained DC/DC converter layouts.

Technical Context

The ICL7667CBA-T implements two independent CMOS inverter stages, each with TTL-compatible input thresholds (VIH = 2.0V, VIL ≤ 0.8V) and rail-swinging outputs capable of sourcing/sinking ≥300mA peak during transitions. Its output stage uses complementary N- and P-channel FETs with no external biasing required, eliminating need for level-shifting components used by legacy drivers like DS0026.

Propagation delay (TD1 ≤ 30ns, TD2 ≤ 50ns) and switching speed are largely independent of V+ across 4.5–15V, while quiescent supply current scales with input logic state (150µA at logic low, 7mA at logic high). Input hysteresis (~50–100mV) prevents oscillation near threshold, and crossover current during output transitions dominates high-frequency power dissipation.

Key Specifications

Pinout & Package

ICL7667CBA-T is housed in an 8-lead narrow-body SOIC (SOIC-N) package per JEDEC MS-012-AA, with 1.27mm lead pitch, 5.00mm body width, and RoHS-compliant matte tin (e3) termination.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual MOSFET driver applications.

Compared with ICL7667CBA-T, ICL7667CBAZA offers identical performance with enhanced environmental compliance, while TSC426CPA trades speed and power efficiency for higher voltage tolerance and legacy footprint support - making ICL7667CBA-T optimal for high-frequency, space-constrained, RoHS-aligned SMPS designs.

Availability

ICL7667CBA-T is available at Aetrix Electronics and suitable for switching power supplies, DC/DC converters, and motor controllers requiring stable component supply, long-lifecycle support, and verified second-source alternatives.

Supply support for ICL7667CBA-T 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

Intersil Corporation is a leading provider of precision analog and power management ICs, now part of Renesas Electronics, with deep expertise in high-efficiency power conversion and robust industrial-grade signal conditioning.

The ICL7667 product line was engineered specifically for high-speed, high-current gate driving in switched-mode power supplies - prioritizing low propagation delay, rail-to-rail output swing, and TTL interoperability without external components.

FAQ

What is the maximum operating frequency supported by the ICL7667CBA-T?

The ICL7667CBA-T does not specify a hard maximum frequency, but its 30ns rise/fall times and <50ns propagation delays enable reliable operation up to 1–2MHz in practical gate drive applications. Performance depends on load capacitance and PCB layout; Figure 5 in the datasheet shows supply current rising with frequency, indicating usable range extends beyond 100kHz for typical MOSFET gate loads.

Can the ICL7667CBA-T drive both N-channel and P-channel MOSFETs directly?

Yes, the ICL7667CBA-T can directly drive N-channel MOSFETs in low-side or high-side configurations (with appropriate level shifting) and P-channel MOSFETs in high-side switches. Its rail-to-rail output swing (V+ − 50mV / 50mV above V−) provides sufficient gate overdrive for both types, though external bootstrap or isolated supplies may be needed for floating high-side N-MOSFETs.

Is the ICL7667CBA-T pin-compatible with the DS0026 or DS0056?

Yes, the ICL7667CBA-T is explicitly stated as pin-equivalent to DS0026/DS0056 and TSC426 in the datasheet. However, it improves upon those legacy parts with lower output impedance (7Ω vs ~15Ω), faster switching, and elimination of external speed-up capacitors - enabling drop-in replacement with performance gains in existing designs.

What is the recommended bypass capacitor configuration for the ICL7667CBA-T?

The datasheet specifies a parallel combination of a 4.7µF tantalum capacitor and a low-inductance 0.1µF ceramic capacitor placed as close as possible to the V+ and V− pins. This dual-capacitor arrangement maintains low impedance across both low- and high-frequency ranges, suppressing supply ringing caused by rapid gate charging currents up to 300mA peak.

Does the ICL7667CBA-T require external pull-up or pull-down resistors on its inputs?

No, the ICL7667CBA-T inputs are TTL/CMOS compatible with built-in threshold detection and ~50–100mV hysteresis, eliminating need for external biasing. However, unused inputs must be tied to V− (ground) - never left floating - to prevent unintended output switching and potential device damage due to high crossover current in indeterminate states.