LM70880-Q1
- AEC-Q100 qualified
for automotive applications:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature
- Functional Safety-Capable
- Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
- Wide input voltage range: 4.5V to 80V
- Shutdown mode current: 2.3µA
- No-load IQ regulating 48V to 5V: 8.2µA
- 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 55V
- Dual-phase operation enabling output currents up to 16A
- Designed for low EMI
requirements
- Facilitates CISPR 25 Class 5 compliance
- Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
- Switching frequency: 200kHz to 2.2MHz
- Pin-configurable AUTO or FPWM operation
- Inherent protection features for robust design
- Internal hiccup-mode overcurrent protection
- Enable, power good, and thermal shutdown
- Internal or external loop compensation
- 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
- Create a custom design using the LM708x0-Q1 with the WEBENCH Power Designer
The LM708x0-Q1 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 80V and delivering up to 8A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.
The LM708x0-Q1 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM708x0-Q1 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16A of output current.
The LM708x0-Q1 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.
Additional features of the LM708x0-Q1 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.
The LM708x0-Q1 converter comes in a 6mm × 6mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).
技術文件
設計與開發
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LM70880QEVM — LM70880-Q1 評估模組
LM70XX0-CALC — LM70XX0 quickstart design tool calculator
PMP31291 — 27W 反相降壓升壓參考設計
此參考設計是靈活且精巧的電源供應器，可提供負輸出電壓軌。此設計包括 LM70880-Q1 裝置 (80V、8A 高效率降壓轉換器)。輸出電壓值可在三個預先定義的設定中選擇：-7V/-10V/-11V。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RRX) | 29 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。