300 mA, Low Dropout CMOS Linear Regulator
The ADP1712/ADP1713/ADP1714 are available in 16 fixed output voltage options. The ADP1712 is also available in an adjustable version, which allows output voltages that range from 0.8 V to 5 V via an external divider. The ADP1712 fixed version allows an external capacitor to be connected to program the soft-start time. The ADP1713 allows a reference bypass capacitor to be connected, which reduces output voltage noise and improves power supply rejection. The ADP1714 includes a tracking feature, which allows the output to follow an external voltage rail or reference.
The ADP1712/ADP1713/ADP1714 are optimized for stable operation with small 2.2 μF ceramic output capacitors, allowing good transient performance while occupying minimal board space. An enable pin controls the output voltage on all devices, and an undervoltage lockout circuit disables the regulator if IN drops below a minimum threshold. The parts also have short circuit protection and thermal overload protection, which prevent damage to the devices in adverse conditions.
- Mobile phones
- Digital camera and audio devices
- Portable and battery-powered equipment
- Post dc-dc regulation
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Simple device measurements such as line and load regulation, dropout, and ground current can be demonstrated with just a single voltage supply, a voltmeter, a current meter, and load resistors.
Power Reference Designs
ADP1829, ADP210x, ADP171x Reference Design
Seven Output Voltages: 5.0 V, 3.6 V, 3.3 V, 2.5 V, 1.8 V, 1.2 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage:
Power Reference Designs
ADP1829, ADP210x and ADP171x Reference Design
Seven Output Voltages: 3.6 V, 3.3 V,3.3l V 2.5 V, 1.8 V, 1.25 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage:
Ask The Applications Engineer—37: Low-Dropout Regulators
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