LD1117A:Low drop fixed and adjustable positive voltage regulators

The LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (VREF= 1.25 V). In fixed versions, the following output voltages are offered: 1.2 V, 1.8 V, and 3.3 V. The device is supplied in: SOT-223, DPAK and TO-220. Surface mounted packages optimize the thermal characteristics while offering a relevant space saving advantage. High efficiency is assured by an NPN pass transistor. Only a very common 10 μF minimum capacitor is needed for stability. Chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2% at 25 °C.

Key Features

  • Low dropout voltage:
    • 1.15 V typ. @ IOUT = 1 A, 25 °C
  • Very low quiescent current:
    • 5 mA typ. @ 25 °C
  • Output current up to 1 A
  • Fixed output voltage of:
    • 1.2 V, 1.8 V, 3.3 V
  • Adjustable version availability (VREF = 1.25 V)
  • Internal current and thermal limit
  • Only 10 μF for stability
  • Available in ± 2% (at 25 °C) and 4% in full temperature range
  • High supply voltage rejection:
    • 80 dB typ. (at 25 °C)
  • Temperature range: 0 °C to 125 °C
Product Specifications
DescriptionVersionSize
DS1976: Low drop fixed and adjustable positive voltage regulators26.0725 KB
Sample & Buy
Part NumberPackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
LD1117ADT-TRDPAKTape And Reel01250.2781000NECEAR99CHINA
LD1117ADT33TRDPAKTape And Reel01250.2781000NECEAR99CHINA
LD1117ASTRSOT-223Tape And Reel01250.1861000NECEAR99CHINA
LD1117ADT18TRDPAKTape And Reel01250.2571000NECEAR99CHINA
LD1117AV33TO-220ABTube01250.2111000NECEAR99CHINA
LD1117AS12TRSOT-223Tape And Reel01250.1861000NECEAR99CHINA
LD1117ADT12TRDPAKTape And Reel01250.2781000NECEAR99CHINA
LD1117AS18TRSOT-223Tape And Reel01250.1861000NECEAR99CHINA
LD1117AS33TRSOT-223Tape And Reel01250.1861000NECEAR99CHINA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
LD1117ADT-TRDPAKIndustrialEcopack2
LD1117ADT33TRDPAKIndustrialEcopack2md_gr-wspc-to-wspc-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss33aa6.pdf
md_gr-wspc-to-wspc-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss33aa6.xml
LD1117ASTRSOT-223IndustrialEcopack2md_ll-wspc-sot-wspc-223_rfll-wspc-ssadaa6-wspc-(ld1117astr)-wspc-wcp-wspc-ver2_signed.pdf
md_ll-wspc-sot-wspc-223_rfll-wspc-ssadaa6-wspc-(ld1117astr)-wspc-wcp-wspc-ver2.xml
LD1117ADT18TRDPAKIndustrialEcopack2md_gr-wspc-to-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss18aa6_vers2_sdm_signed.pdf
md_gr-wspc-to-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss18aa6_vers2_sdm.xml
LD1117AV33TO-220ABIndustrialEcopack2
LD1117AS12TRSOT-223IndustrialEcopack2md_ll-wspc-sot-wspc-223_rfll-wspc-ss12aa6.pdf
md_ll-wspc-sot-wspc-223_rfll-wspc-ss12aa6.xml
LD1117ADT12TRDPAKIndustrialEcopack2
LD1117AS18TRSOT-223IndustrialEcopack2md_ll-wspc-sot223_rfllks18aa6.pdf
md_ll-wspc-sot223_rfllks18aa6.xml
LD1117AS33TRSOT-223IndustrialEcopack2md_ll-wspc-sot-wspc-223_rfll-wspc-ss33aa6-wspc-lock.pdf
md_ll-wspc-sot-wspc-223_rfll-wspc-ss33aa6.xml
Low drop fixed and adjustable positive voltage regulators LD1117A
md_gr-wspc-to-wspc-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss33aa6.pdf LD1117A
md_gr-wspc-to-wspc-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss33aa6.xml LD1117A
md_ll-wspc-sot-wspc-223_rfll-wspc-ssadaa6-wspc-(ld1117astr)-wspc-wcp-wspc-ver2_signed.pdf LD1117A
md_ll-wspc-sot-wspc-223_rfll-wspc-ssadaa6-wspc-(ld1117astr)-wspc-wcp-wspc-ver2.xml LD1117A
md_gr-wspc-to-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss18aa6_vers2_sdm_signed.pdf LD1117A
md_gr-wspc-to-252-wspc-dpak-wspc-cu-wspc-wire_hzgr-wspc-ss18aa6_vers2_sdm.xml LD1117A
md_ll-wspc-sot-wspc-223_rfll-wspc-ss12aa6.pdf LD1117A
md_ll-wspc-sot-wspc-223_rfll-wspc-ss12aa6.xml LD1117A
md_ll-wspc-sot223_rfllks18aa6.pdf LD1117A
md_ll-wspc-sot223_rfllks18aa6.xml LD1117A
md_ll-wspc-sot-wspc-223_rfll-wspc-ss33aa6-wspc-lock.pdf LD1117A
md_ll-wspc-sot-wspc-223_rfll-wspc-ss33aa6.xml LD1117A