Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | QFN |
| Pkg. Code: | LAZ |
| Lead Count (#): | 32 |
| Pkg. Dimensions (mm): | 5.00 x 5.00 x 0.90 |
| Pitch (mm): | 0.5 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
| RoHS (ISL9440BIRZ) | Download |
Product Attributes
| Lead Count (#) | 32 |
| Carrier Type | Tube |
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range (°C) | -40 to +85°C |
| Bias Voltage Range (V) | 5 - 5 |
| DDR Capable | No |
| Input Voltage (Max) (V) | 24 |
| Input Voltage (Max) [Rail 1] (V) | 24 - 24 |
| Input Voltage (Min) (V) | 4.5 |
| Input Voltage (Min) [Rail 1] (V) | 4.5 |
| Length (mm) | 5 |
| Linear Output | Yes |
| MOQ | 600 |
| Output Current (Max) [Rail 1] (A) | 0.8 |
| Output Current 1 (Max) (A) | 0.8 |
| Output Current 2 (Max) (A) | 24 |
| Output Voltage (Max) [Rail 1] (V) | 24 |
| Output Voltage (Min) (V) | 0.8 |
| Output Voltage (Min) [Rail 1] (V) | 0.8 |
| Output Voltage 1 (Max) (V) | 24 |
| Output Voltage 2 (Max) | Adj. |
| Output Voltage 3 (Max) | Adj. |
| Outputs (#) | 4 |
| Parametric Category | Buck Controllers (External FETs) |
| Pitch (mm) | 0.5 |
| Pkg. Dimensions (mm) | 5.0 x 5.0 x 0.90 |
| Pkg. Type | QFN |
| Qualification Level | Standard |
| Switching Frequency Range (Typical) (kHz) | 300 - 300 |
| Thickness (mm) | 0.9 |
| Topology [Rail 1] | Buck |
| Width (mm) | 5 |
Resources for ISL9440B
Description
The ISL9440B and ISL9440C are quad-output synchronous buck controllers that integrate three PWM controllers and one low drop-out linear regulator controller, which are full 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. 8V. The PWMs are synchronized at 180° out-of-phase thus, reducing the RMS input current and ripple voltage. The ISL9440B and ISL9440C offer programmable soft-start, independent enable inputs for ease of supply rail sequencing, and integrated UV/OV/OC/OT protections in a space conscious 5mmx5mm QFN package. An early warning function is offered to output a logic signal to warn the system to back up data when input voltage falls below a certain level. The ISL9440B and ISL9440C utilize internal loop compensation to keep minimum peripheral components for 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.