2.8V to 5.5V, 300mA step-down/step-up negative output regulator

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netwing 2023-12-22

LMR70503 is a step-down to step-up converter with adjustable negative output voltage, packaged in a miniature 8-point thin DSBGA package. Its unique control method aims to provide fast transient response, low output noise, high efficiency, and strict regulation in the smallest possible PCB area. LMR70503 has built-in soft start, peak current limitation, minimum switching frequency, and undervoltage lockout (UVLO), without the need for external compensation.
For ease of use, the Enable pin refers to the ground of the IC, not the lowest potential of the IC: negative output voltage.
Characteristics of LMR70503
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

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2.8V to 5.5V, 300mA step-down/step-up negative output regulator

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