2.8V 至 5.5V、300mA 降壓/升壓負輸出穩壓器
| Topology | Inverting |
| Vin (Min) (V) | 2.8 |
| Vin (Max) (V) | 5.5 |
| Vout (Max) (V) | -0.9 |
| Vout (Min) (V) | -5.5 |
| Duty cycle (Max) (%) | 90 |
| Features | Enable |
| Switch current limit (Typ) (A) | 0.32 |
| Switching frequency (Min) (kHz) | 500 |
| Switching frequency (Max) (kHz) | 1000 |
| Iq (Typ) (mA) | 0.3 |
| Rating | Catalog |
- Tiny 8-Bump Thin DSBGA Package: 0.84 mm × 1.615 mm × 0.6 mm
- 2.8 V to 5.5 V Input Voltage Range
- Adjustable Output Voltage: -0.9 V to -5.5 V
- 320 mA Switch Current Limit
- 500 kHz Minimum Switching Frequency
- Ground Referred Enable Input
- Under Voltage Lock Out (UVLO)
- No External Compensation
- Internal Soft Start
- 1 μA Shutdown Supply Current
- Small Output Voltage Ripple
- WEBENCH Enabled
Performance Benefits
- Easy To Use
- Tiny Overall Solution Size Reduces System Cost
SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.
The LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. Its unique control method is designed to provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.
