Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | QFN |
| Pkg. Code: | LFQ |
| Lead Count (#): | 40 |
| Pkg. Dimensions (mm): | 5.00 x 5.00 x 0.90 |
| Pitch (mm): | 0.4 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 2 |
| Pb (Lead) Free | Yes |
| RoHS (ISL9444CRZ) | Download |
| ECCN (US) | |
| HTS (US) |
Product Attributes
| Lead Count (#) | 40 |
| Carrier Type | Tube |
| Moisture Sensitivity Level (MSL) | 2 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range (°C) | See Datasheet |
| Bias Voltage Range (V) | 5 - 5 |
| DDR Capable | No |
| Input Voltage (Max) (V) | 26 |
| Input Voltage (Max) [Rail 1] (V) | 26 - 26 |
| Input Voltage (Min) (V) | 4.5 |
| Input Voltage (Min) [Rail 1] (V) | 4.5 |
| Length (mm) | 5 |
| Linear Output | Yes |
| MOQ | 660 |
| Output Current (Max) [Rail 1] (A) | 20 |
| Output Current 1 (Max) (A) | 20 |
| Output Current 2 (Max) (A) | 20 |
| Output Voltage (Max) [Rail 1] (V) | 26 |
| Output Voltage (Min) (V) | 0.7 |
| Output Voltage (Min) [Rail 1] (V) | 0.7 |
| Output Voltage 1 (Max) (V) | 26 |
| Output Voltage 2 (Max) | 26 |
| Output Voltage 3 (Max) | 26 |
| Outputs (#) | 3 |
| Parametric Category | Buck Controllers (External FETs) |
| Pitch (mm) | 0.4 |
| Pkg. Dimensions (mm) | 5.0 x 5.0 x 0.90 |
| Pkg. Type | QFN |
| Qualification Level | Standard |
| Switching Frequency Range (Typical) (kHz) | 200 - 1200 |
| Thickness (mm) | 0.9 |
| Topology [Rail 1] | Buck |
| Width (mm) | 5 |
Resources for ISL9444
Description
The ISL9444 is a triple-output synchronous buck controller that integrates three PWM controllers which are fully featured and designed to provide multi-rail power for use in products such as cable and satellite set-top boxes, VoIP gateways, cable modems, and other home connectivity products as well as a variety of industrial and general purpose applications. Each output is adjustable down to 0. 7V. The PWMs are synchronized at 180° out-of-phase, thus reducing the input RMS current and ripple voltage. The ISL9444 offers independent power-good indicators, programmable soft-start and tracking functions for ease of supply rail sequencing and integrated UV/OV/OC/OT protections in a space conscious 5mmx5mm QFN package. Switching frequency can be set between 200kHz and 1200kHz using a resistor. The ISL9444 can be synchronized to another ISL9444 to reduce any beat frequency. The ISL9444 utilizes internal loop compensation to keep minimum peripheral components for a compact design and a low total solution cost. These devices are implemented with current mode control with feed-forward to cover various applications even with fixed internal compensations.