LD33CB (LD33) voltage regulator

The LD33CB, LD33 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.

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
Electrical characteristics :

VO Output voltage VI = 5.3 V, IO = 10 mA, TJ = 25 °C 3.234 3.3 3.366 V
VO Output voltage IO = 0 to 1 A, VI = 4.75 to 10 V 3.168 3.432 V
ΔVO Line regulation VI = 4.75 to 8 V, IO = 0 mA 1 6 mV
ΔVO Load regulation VI = 4.75 V, IO = 0 to 1 A 1 10 mV
ΔVO Temperature stability 0.5 %
VI Operating input voltage IO = 100 mA 10 V
IO Output current VI – VO = 5 V, TJ = 25 °C 1000 1200 mA