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LTC1261LIMS8#TRPBF

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Analog Devices DC-DC Converters, MSOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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LTC1261LIMS8#TRPBF

Analog Devices · DC-DC Converters · MSOP-8

LTC1261LIMS8#TRPBF from Analog Devices, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VCC power_in Positive power supply input, 2.7V to 5.25V. Must be bypassed to ground with at least a 1µF capacitor placed close to the pin.
2 C1+ passive Flying capacitor positive terminal. Connect a 0.1µF ceramic capacitor between C1+ and C1- to form the charge-pump flying capacitor.
3 C1- passive Flying capacitor negative terminal. Connect a 0.1µF ceramic capacitor from C1+ to C1- to form the charge-pump flying capacitor.
4 GND power_in Device ground. Connect to a low-impedance ground; a ground plane helps minimize output regulation errors.
5 ADJ/COMP input Output adjust / feedback pin on adjustable parts (LTC1261L) - an external resistor divider from OUT to GND sets the regulated negative output voltage using the internal 1.23V reference (typical divider current ≥10µA). On fixed-voltage parts (LTC1261L-4, LTC1261L-4.5) the divider is internal and this pin acts as COMP; a ~100pF capacitor to ground provides loop compensation to reduce output ripple.
6 OUT power_out Regulated negative voltage output (down to -5V, up to 20mA). Bypass to ground with a 1µF or larger capacitor; capacitor value and ESR strongly affect output ripple.
7 REG output Open-drain power-valid / regulation-good status output. Pulls low when the output magnitude is within 5% of the set value; requires an external pull-up (REG will not drive high on its own). Sinks 5mA at VCC = 5V (4mA at VCC = 3.3V); pull-up may exceed VCC up to 6V above ground.
8 SHDN input Active-high shutdown input. When low (or floating - internal 5µA pull-down keeps it low), the LTC1261L operates normally; when pulled high the charge pump is disabled, OUT collapses to 0V, and quiescent current drops to ~5µA.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package MSOP-8
Category Power Management (PMIC)
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • LTC1261LIMS8#TRPBFLCMS8#PBF
  • LTC1261LIMS8#TRPBFLCMS8#TRPBF
  • LTC1261LIMS8#PBF
  • LTC1261LIMS8#TRPBF
  • LTC1261LIMS8#TRPBFLCMS8-4#PBF
  • LTC1261LIMS8#TRPBFLCMS8-4#TRPBF
  • LTC1261LIMS8-4#PBF
  • LTC1261LIMS8-4#TRPBF
  • LTC1261LIMS8#TRPBFLCMS8-4.5#PBF
  • LTC1261LIMS8#TRPBFLCMS8-4.5#TRPBF
  • LTC1261LIMS8-4.5#PBF
  • LTC1261LIMS8-4.5#TRPBF
  • LTC1261LIMS8#TRPBFLCS8#PBF
  • LTC1261LIMS8#TRPBFLCS8#TRPBF
  • LTC1261LIMS8#TRPBFLIS8#PBF
  • LTC1261LIMS8#TRPBFLIS8#TRPBF
  • LTC1261LIMS8#TRPBFLCS8-4#PBF
  • LTC1261LIMS8#TRPBFLCS8-4#TRPBF
  • LTC1261LIMS8#TRPBFLIS8-4#PBF
  • LTC1261LIMS8#TRPBFLIS8-4#TRPBF
  • LTC1261LIMS8#TRPBFLCS8-4.5#PBF
  • LTC1261LIMS8#TRPBFLCS8-4.5#TRPBF
  • LTC1261LIMS8#TRPBFLIS8-4.5#PBF
  • LTC1261LIMS8#TRPBFLIS8-4.5#TRPBF

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage (VCC) VCC 2.7 5.25 V 3
Supply Current (SHDN floating) ICC 650 1500 µA VCC = 5.25V, No Load, SHDN Floating 3
Supply Current in shutdown ICC 5 20 µA VCC = 5.25V, No Load, VSHDN = VCC 3
REG Output Low Voltage VOL 0.1 0.8 V IREG = 1mA, VCC = 5V, VOUT = –4V 3
REG Sink Current IREG 4 8 mA VREG = 0.8V, VCC = 3.3V 3
REG Sink Current IREG 5 12 mA VREG = 0.8V, VCC = 5V 3
Adjust Pin Current IADJ -1 0.01 1 µA VADJ = 1.23V 3
SHDN Input High Voltage VIH 2 V VCC = 5V 3
SHDN Input Low Voltage VIL 0.8 V VCC = 5V 3
SHDN Input Current IIN 2.5 25 µA VSHDN = VCC 3
Turn-On Time tON 250 1500 µs VCC = 5V, IOUT = 10mA, –1.5V ≤ VOUT ≤ –4V (LTC1261L) 3
Output Regulation (LTC1261L) VOUT -1.552 -1.5 -1.448 V 2.70V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 10mA 3
Output Regulation (LTC1261L) VOUT -2.07 -2 -1.93 V 2.70V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 5mA 3
Output Regulation (LTC1261L) VOUT -2.07 -2 -1.91 V 3.50V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 20mA 3
Output Regulation (LTC1261L) VOUT -2.587 -2.5 -2.413 V 2.95V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 5mA 3
Output Regulation (LTC1261L) VOUT -2.587 -2.5 -2.41 V 3.85V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 20mA 3
Output Regulation (LTC1261L) VOUT -3.105 -3 -2.895 V 3.40V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 5mA 3
Output Regulation (LTC1261L) VOUT -3.105 -3 -2.885 V 4.25V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 20mA 3
Output Regulation (LTC1261L) VOUT -3.622 -3.5 -3.378 V 3.85V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 5mA 3
Output Regulation (LTC1261L) VOUT -3.622 -3.5 -3.365 V 4.60V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 20mA 3
Output Regulation (LTC1261L/LTC1261L-4) VOUT -4.14 -4 -3.86 V 4.35V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 5mA 3
Output Regulation (LTC1261L/LTC1261L-4) VOUT -4.14 -4 -3.83 V 5.10V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 20mA 3
Output Regulation (LTC1261L/LTC1261L-4.5) VOUT -4.657 -4.5 -4.343 V 4.75V ≤ VCC ≤ 5.25V, 0mA ≤ IOUT ≤ 5mA 3
Output Short-Circuit Current ISC 100 220 mA VOUT = 0V, VCC = 5.25V 3
Output Voltage VOUT -5.3 0.3 V Note 3; printed as 0.3V to –5.3V 2
Total Voltage, VCC to VOUT VCC-VOUT 10.8 V Note 2 2
SHDN Pin Voltage VSHDN -0.3 V Upper limit printed as (VCC + 0.3V) 2
REG Pin Voltage VREG -0.3 6 V 2
Storage Temperature Range TSTG -65 150 °C 2
Lead Temperature (Soldering, 10 sec) TLEAD 300 °C 10 sec soldering 2
Industrial Operating Temperature Range TA -40 85 °C Industrial grade (LTC1261LI), Note 4 2
Maximum Junction Temperature (MS8) TJMAX 150 °C MS8 package 2
Thermal Resistance Junction-to-Ambient (MS8) θJA 200 °C/W MS8 package 2

CAD (KiCad official)

  • Symbol: LTC1261LIMS8#TRPBF
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: ltc1261lims8-trpbf-etched.step / ltc1261lims8-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ltc1261lims8-trpbf.step / ltc1261lims8-trpbf.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices datasheet (14 pp, sha256 336624392408a8a5, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF