LD1117CDTTR| Datasheet

LD1117CDTTR, LD1117D18CTR, LD1117D28TR, LD1117D33CTR, LD1117D33TR, LD1117DT12TR, LD1117DT18CTR, LD1117DT18TR, LD1117DT25CTR, LD1117DT25TR, LD1117DT28TR, LD1117DT33CTR, LD1117DT33TR, LD1117DT50CTR, LD1117DT50TR, LD1117DTC-R, LD1117DTTR, LD1117S, LD1117S12TR, LD1117S18CTR, LD1117S18TR, LD1117S25CTR, LD1117S25TR, LD1117S28, LD1117S28TR, LD1117S30, LD1117S30TR, LD1117S33CTR, LD1117S33TR, LD1117S50, LD1117S50CTR, LD1117S50TR, LD1117SC-R, LD1117STR, LD1117V, LD1117V18, LD1117V18C, LD1117V25, LD1117V25C, LD1117V33, LD1117V33C, LD1117V50, LD1117XX, LD1117XX12, LD1117XX18, LD1117XX18C, LD1117XX25, LD1117XX25C, LD1117XX28, LD1117XX30, LD1117XX33, LD1117XX33C, LD1117XX50, LD1117XX50C, LD1117XXC

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LD1117xx
Low drop fixed and adjustable positive voltage regulators
Features

Low dropout voltage (1 V typ.) 2.85 V Device performances are suitable for SCSI-2 active termination Output current up to 800 mA Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V, 2.85 V, 3.0 V, 3.3 V, 5.0 V Adjustable version availability (Vref = 1.25 V) Internal current and thermal limit Available in 1% (at 25 C) and 2% in full temperature range Supply voltage rejection: 75 dB (typ.) High efficiency is assured by NPN pass transistor. In fact in this case, unlike than PNP one, the quiescent current flows mostly into the load. Only a very common 10uF minimum capacitor is needed for stability. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25 C. The ADJUSTABLE LD1117 is pin to pin compatible with the other standard. Adjustable voltage regulators maintaining the better performances in terms of drop and tolerance.
SOT-223 SO-8 DPAK TO-220

Description
The LD1117 is a LOW DROP Voltage Regulator able to provide up to 800 mA of Output Current, available even in adjustable version (Vref=1.25 V). Concerning fixed versions, are offered the following Output Voltages: 1.2 V, 1.8 V, 2.5 V, 2.85 V, 3.0 V, 3.3 V and 5.0 V. The 2.85 V type is ideal for SCSI-2 lines active termination. The device is supplied in: SOT-223, DPAK, SO-8 and TO-220. The SOT-223 and DPAK surface mount packages optimize the thermal characteristics even offering a relevant space saving effect.

Table 1.

Device summary
Part numbers LD1117XX12 LD1117XX12C LD1117XX18 LD1117XX18C LD1117XX25 LD1117XX25C LD1117XX28 LD1117XX30 LD1117XX33 LD1117XX33C LD1117XX50 LD1117XX50C LD1117XX LD1117XXC

November 2007

Rev 22

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