IMP3 7
POWER MANAGEMENT
Low Dropout Positive Voltage Regulators
– 800mA – 2.5V, 3.0V and 3.3V Output
The IMP37 series o...
IMP3 7
POWER MANAGEMENT
Low Dropout Positive
Voltage Regulators
– 800mA – 2.5V, 3.0V and 3.3V Output
The IMP37 series of Low Dropout (LDO) three-terminal
voltage regulators feature guaranteed low dropout
voltages at currents up to 0.8A. The IMP37 regulator family dropout
voltage is guaranteed to be 0.95V or lower at 0.8A. At 100mA, the maximum dropout
voltage is 0.8V. Compared with “1117” type LDOs, the IMP37 has a 20% lower dropout
voltage. Three fixed output
voltages are offered: 2.5V, 3.0V and 3.3V. Output
voltages are factory trimmed to within 1% of the nominal value. In addition to low dropout
voltages, the IMP37 family features greatly reduced quiescent operating current. The 75µA maximum specification represents an over 100 times improvement over competitive devices. Devices are short circuit protected, and a thermal protection circuit shuts the regulator off should the junction temperature exceed 165°C. The IMP37 is available in low-profile plastic SOT-223 and TO-263 packages and are pin compatible with fixed “1117” devices.
Key Features
x Low Dropout
Voltage – 0.8V maximum at 100mA – 0.95V maximum at 800mA – 20% lower dropout
voltage than “1117” LDO regulators x Guaranteed Low Dropout
Voltage at Multiple Current Levels x 1% Trimmed 2.5V, 3.0V and 3.3V Outputs x Reduced Quiescent Current: 75µA Maximum x Short Circuit and Thermal Protection x Space Saving SOT-223 Surface Mount Package x “1117” Pin Compatible
Applications
x x x x x x High-efficiency linear power supp...