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Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | CFP |
| Pkg. Code: | KDJ |
| Lead Count (#): | 24 |
| Pkg. Dimensions (mm): | 15.1 x 12.7 x 2.34 |
| Pitch (mm): | 1.3 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | Not Applicable |
| Pb (Lead) Free | Exempt |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
Product Attributes
| Pkg. Type | CFP |
| Lead Count (#) | 24 |
| Carrier Type | Tray |
| Moisture Sensitivity Level (MSL) | Not Applicable |
| Pitch (mm) | 1.3 |
| Pkg. Dimensions (mm) | 15.1 x 12.7 x 2.34 |
| Pb (Lead) Free | Exempt |
| Pb Free Category | Gold Plate over compliant Undercoat-e4 |
| MOQ | 1 |
| Temp. Range (°C) | -55 to +125°C |
| Control Mode | Peak Current Mode |
| Control Type | Current Mode |
| Controller / Integrated | Controller |
| Die Sale Availability? | Yes |
| Duty Cycle (Max) (%) | 96 |
| Flow | RH Hermetic |
| Length (mm) | 15.1 |
| Models Available | iSIM, SIMPLIS |
| No-Load Operating Current | 22 mA |
| Operating Freq (Max) (MHz) | 1.5 |
| Output Voltage (Max) (V) | 13.5 |
| Output Voltage (Min) (V) | 0.2 |
| Outputs (#) | 2 |
| Outputs (Max) (#) | 1 |
| PROTO Availability? | Yes |
| Peak Efficiency (%) | 90 |
| Phase of Outputs | Out of Phase |
| Phases (Max) | 2 |
| Qualification Level | EM |
| Quiescent Current | 11µA |
| Rating | Space |
| SYNCH Capability | Yes |
| Simulation Model Available | iSim |
| Supply Voltage (max) (V) | 19 - 19 |
| Supply Voltage (min) (V) | 4.5 - 4.5 |
| Switching Frequency (KHz) | 250 - 1500 |
| Switching Frequency (max) (kHz) | 1500kHz |
| Switching Frequency (min) (kHz) | 250kHz |
| Thickness (mm) | 2.34 |
| Topology | Sync. Buck |
| Topology [Rail 1] | Buck |
| VREF (V) | 0.2 - 1.2 |
| Width (mm) | 12.7 |
Resources for ISL73849SLH
Description
The ISL73849SLH is a PMBus-based synchronous buck controller that can operate as a single or dual-phase controller. It is intended to work with the ISL73041SEH (half-bridge GaN FET driver) to generate point-of-load voltage rails for commercial space applications. This device operates across the military temperature range from -55°C to +125°C and is available in a 24 Ld hermetically sealed Ceramic Dual Flatpack (CDFP) package or die form.
It accepts an input voltage range of 4.5V to 19V with a programmable output switching frequency between 250kHz and 1.5MHz with a single resistor. The output can regulate a voltage upwards of 200mV and is limited on the top end by the minimum off time and selected switching frequency.
The ISL73849SLH features built-in current sharing, enabling two-phase operation within a single device and four-phase operation using two ISL73849s, all without requiring an external clock at ≤ 1.04MHz. For multiphase operation at other frequencies, the ISL74420 provides additional scalability, making it a flexible solution for multiphase power architectures.
The wide input voltage range makes it a suitable power supply option for a high current FPGA core and other general-purpose power solutions. The ISL73849SLH uses current-mode modulation, which simplifies loop compensation and provides excellent power supply rejection. Additionally, the output is remotely sensed to compensate for any voltage drop in the load conditions. All of this put together results in a robust power supply solution that requires minimal components while achieving high current density.
It also features a tri-level output that provides excellent protection against faults by driving a mid-scale voltage to signal the power stage to enter a Hi-Z condition. Control, telemetry, and fault reporting through PMBus make the ISL73849SLH easy to program using an MCU.