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LD1085: Low Drop Positive Voltage Regulator (Fixed and Adjustable)

 
LD1085 photo The LD1085 is a Low Drop Voltage Regulator able to provide an output current of up to 3A. Dropout is guaranteed at a maximum of 1.5V at the maximum output current, decreasing at lower loads. The LD1085 is pin compatible with older 3-terminal adjustable regulators, but has better performance in terms of drop and output tolerance. A 2.85V output version is suitable for SCSI-2 active termination. Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1085 quiescent current flows into the load, so increasing efficiency. Only a 10µF minimum capacitor is needed for stability. The device is supplied in TO-220 and D2PAK packages. On-chip trimming allows the regulator to reach a very tight output voltage tolerance, within ±1% at 25°C. This device is pin-to-pin compatible with the same devices made by Linear Technology, Semtech, Cherry and Linfinity.


Features

Typical dropout 1.3V (@3A)
Guaranteed output current up to 3A
Internal power and thermal limit
Package availability: TO-220 and D2PAK
Output tolerance ±1% at 25°C and ±2% in full temperature range
Pinout compatibility with standard adjustable Voltage Regulators
Wide operating temperature range -40° to 125°C
Three terminal adjustable or fixed output voltage 1.8V, 2.5V, 2.85V, 3.3V, 3.6V, 5V, 8V, 9V, 12V.

Segments & Applications

Desktop PCs
Battery Chargers
Graphics and Sound Chipset
ASIC and Low Voltage IC Supplies
TV Sets / Monitors
Palmtop/Laptop Computers
Camcorders / VCRs
Personal Stereos

Application Circuit

LD1085 application circuit

Pin Configurations

D2PAK pin configuration
D2PAK
TO-220 pin configuration
TO-220

Pin # Symbol Name and Function
1 ADJ / GND ADJ or Ground Pin*
2 OUT Output Pin
3 IN Input Pin
* for fixed version

Order Codes

Fixed Adjustable
PACKAGE TYPE PACKAGE TYPE
D2PAK/A (TUBE) LD1085D2M00 D2PAK/A (TUBE) LD1085D2M
D2PAK/A (T&R) LD1085D2M00R D2PAK/A (T&R) LD1085D2M-R
D2PAK (TUBE) LD1085D2T00 D2PAK (TUBE) LD1085D2T
D2PAK (T&R) LD1085D2T00R D2PAK (T&R) LD1085D2T-R
TO-220 (TUBE) LD1085V00 TO-220 (TUBE) LD1085V

Cross Reference

ST CHERRY LINEAR TECH SEMTECH LINFINITY
LD1085 CS5283 LT1085 EZ1085 LX8385