LD2982AM15R| Datasheet

LD2982AM15R, LD2982AM18R, LD2982AM25R, LD2982AM27R, LD2982AM30R, LD2982AM32R, LD2982AXX15, LD2982AXX18, LD2982AXX25, LD2982AXX27, LD2982AXX30, LD2982AXX32, LD2982AXX33, LD2982BM15R, LD2982BM18R, LD2982BM25R, LD2982BM27R, LD2982BM30R, LD2982BM32R, LD2982BXX15, LD2982BXX18, LD2982BXX25, LD2982BXX27, LD2982BXX30, LD2982BXX32, LD2982BXX33

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LD2982Axx LD2982Bxx
Very low drop and low noise voltage regulator with inhibit function, low ESR capacitors compatible
Features

Very low dropout voltage (120 mV at 50 mA and 7 mV at 1 mA load) Very low quiescent current (375 mA typ. at 50 mA load and 75 mA at 1 mA) Output current up to 50 mA Logic controlled electronic shutdown Output voltage of 1.5,1.8, 2.5, 2.7, 3, 3.2, 3.3 V Internal current and thermal limit Available in 1 % tolerance (at 25 C, A version) Supply voltage rejection: 45 dB (typ) Only 1 uF for stability Low output noise voltage 30 uVrms Smallest package SOT23-5L Temperature range: -40 C to 125 C battery powered systems. In sleep mode quiescent current is less than 1 uA when INHIBIT pin is pulled low. Shutdown Logic Control Function is available on pin 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. An external capacitor CBYP = 10 nF connected between bypass pin and GND reduce the noise to 30 uVrms. Typical application are in cellular phone, palmtop/laptop computer, personal digital assist
ant (PDA), personal stereo, camcorder and camera.
SOT23-5L

Description
The LD2982 is a 50 mA fixed output voltage regulator. The ultra low drop voltage and the low quiescent current make them particularly suitable for low noise, low power applications, and in

Table 1.

Device summary
Order codes A Version LD2982AM15R LD2982AM18R LD2982AM25R LD2982AM27R LD2982AM30R LD2982AM32R LD2982AM33R B Version LD2982BM15R LD2982BM18R LD2982BM25R LD2982BM27R LD2982BM30R LD2982BM32R LD2982BM33R Output voltage 1.5 V 1.8 V 2.5 V 2.7 V 3.0 V 3.2 V 3.3 V

February 2008

Rev 5

1/19
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