ADP5300ACPZ-1-R7

A high efficiency, ultralow quiescent current step-down regulator that draws only 180 nA quiescent current to regulate the output. It runs from an input supply voltage range of 2.15 V to 6.50 V, allowing the use of multiple alkaline or NiMH, Li-Ion cells, or other power sources. The output voltage is selectable from 0.8 V to 5.0 V by an external VID resistor and factory fuse. The total solution requires only four tiny external components. It can operate between hysteresis mode and pulsewidth modulation (PWM) mode via the SYNC/MODE pin. The regulator in hysteresis mode achieves excellent efficiency at a power of less than 1 mW and provides up to 50 mA of output current. The regulator in PWM mode produces a lower output ripple and supplies up to 500 mA of output current. The flexible configuration capability during operation of the device enables very efficient power management to meet both the longest battery life and low system noise requirements. It contains a VOUTOK flag, which monitors the output voltage and runs at a 2 MHz switching frequency in PWM mode. SYNC/MODE can be synchronized to an external clock from 1.5 MHz to 2.5 MHz. It includes an STOP pin that can disable the regulator switching temporarily, in this way a quiet system environment can be achieved to benefit noise sensitive circuitry, such as data conversion, RF data transmission, and analog sensing. Other key features include separate enabling, QOD, and safety features such as overcurrent protection (OCP), thermal shutdown (TSD), and input undervoltage lockout (UVLO). It is available in a 10-lead, 3 mm×3 mm LFCSP rated for a -40°C to +125°C operating temperature range.

Applications

• Energy (gas and water) metering
• Portable and battery-powered equipment
• Medical applications
• Keep-alive power supplies

Key features

• Input supply voltage range: 2.15 V to 6.50 V
• Operates down to 2.00 V voltage
• Ultralow 180 nA quiescent current
• Selectable output voltage of 0.8 V to 5.0 V
• ±1.5% output accuracy over full temperature range in PWM mode
• Selectable hysteresis mode or PWM operation mode
• Output current: Up to 50 mA in hysteresis mode, Up to 500 mA in PWM mode
• VOUTOK flag monitors the output voltage
• Ultrafast stop switching control
• 700% duty cycle operation mode
• 2.0 MHz typical switching frequency in PWM mode with optional SYNC clock range from 1.5 MHz to 2.5 MHz
• Quick output discharge (QOD) option
• UVLO, OCP, and TSD protection
• 10-lead, 3 mm×3 mm LFCSP
• -40°C to +125°C operating temperature range