Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | TQFN |
| Pkg. Code: | LYW |
| Lead Count (#): | 28 |
| Pkg. Dimensions (mm): | 3.99 x 3.99 x 0.75 |
| Pitch (mm): | 0.4 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| RoHS (ISL9520HRTZ-T) | Download |
| ECCN (US) | |
| HTS (US) |
Product Attributes
| Lead Count (#) | 28 |
| Carrier Type | Reel |
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range (°C) | -10 to +100°C |
| Audible Noise | No |
| Automatic Power Source Selection | No |
| Automatic Trickle Charge (Typical) | 4.7 |
| Battery Charge Voltage | 2.5V to 19V in 16mV Steps |
| Battery Charge Voltage Adjustment | 16mV steps |
| Battery Chemistry | Multi-Cell Li+/Polymer |
| Battery Leakage Current (Max) | 25μA (DCIN=0V, No System Load) |
| Charge Current Limit Accuracy | ±3 |
| Charging Voltage Accuracy (Max) (±%) | 0.5 |
| DC Adapter Detection | Yes |
| Input Current Limit Accuracy (% (±)) | 3 |
| Input Voltage (Max) (V) | 22 |
| Input Voltage (Min) (V) | 9 |
| Input Voltage Range (V) | 9 - 22 |
| Length (mm) | 4 |
| MOQ | 6000 |
| Parametric Category | Battery Charger ICs |
| Pitch (mm) | 0.4 |
| Pkg. Dimensions (mm) | 4.0 x 4.0 x 0.75 |
| Pkg. Type | TQFN |
| Qualification Level | Standard |
| Switching Frequency Range (Typical) (kHz) | 400 - 400 |
| Thickness (mm) | 0.75 |
| Topology [Rail 1] | Variable Frequency Synchronous Buck |
| Trickle Charge Current Range | 256mA |
| Width (mm) | 4 |
Resources for ISL9520
Description
The ISL9520 is a highly integrated narrow VDC system voltage regulator and battery charger controller. Operating parameters are programmable over the System Management Bus (SMBus). The ISL9520 is designed for applications where the system power source is either the battery pack or the output of the regulator/charger. This makes the max voltage to the system equal to the max battery voltage instead of the max adapter voltage. The ISL9520 also includes a patented system to control trickle charging deeply discharged batteries while maintaining system voltage at a user-defined minimum. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation and variable switching frequency for enhanced light load efficiency and AC-adapter boosting prevention. The ISL9520 can charge two, three, or four series-connected Lithium-ion cells, at up to 8A charge current. Default settings for 2-, 3- or 4-cell operation at power-up are selected by an external pin. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy. The ISL9520 provides an open drain digital output that indicates the presence of the AC-adapter. The ISL9520 also provides an analog output that indicates the battery discharge current and an output that indicates the adapter current.