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LDS3985PU33R

Very low drop and low noise BiCMOS 300 mA voltage regulator

Manufacturer:

STMicroelectronics
Mfr.Part #:

LDS3985PU33R
Datasheet:

LDS3985PU33R Datasheet (PDF)
Output Configuration:

Positive
Output Type:

Fixed
Number of Regulators:

1
Voltage - Input (Max):

6V
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LDS3985PU33R General Description

The LDS3985 provides up to 300 mA, from 2.5 V to 6 V input voltage. It is stable with ceramic and high quality tantalum capacitor. The ultra low drop voltage, low quiescent current and low noise make it suitable for low power applications and battery-powered systems. Shutdown logic control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. Typical applications are mobile phones and similar battery-powered wireless systems, portable information appliances.

Key Features

Input voltage from 2.5 V to 6 V
Stable with low ESR ceramic capacitors
Very low dropout voltage (150 mV typ. at 300 mA load, 0.4 mV typ. at 1 mA load)
Very low quiescent current (85 µA typ. at no load, 200 µA typ. at 300 mA load; max.1.5 µA in OFF mode)
Guaranteed output current up to 300 mA
Wide range of output voltages available on request: fixed from 1.25 V to 5 V with 100 mV step
Fast turn-on time: typ. 240 µs
- [C_O = 2.2 µF, C_{BYP= 33 nF and I_O= 1 mA]}
Logic-controlled electronic shutdown
Internal current and thermal limit
Low output voltage noise: 30 µ V_RMS over 10 Hz to 100 kHz
SVR of 55 dB at 1 kHz, 50 dB at 10 kHz
Temperature range: - 40 °C to 125 °C
Automotive grade product available in DFN6 package, temperature range: - 40 °C to 85 °C

Specifications

Output Configuration	Positive	Output Type	Fixed
Number of Regulators	1	Voltage - Input (Max)	6V
Voltage - Output (Min/Fixed)	3.3V	Voltage Dropout (Max)	0.25V @ 300mA
Current - Output	300mA	Current - Quiescent (Iq)	150 µA
Current - Supply (Max)	300 µA	PSRR	55dB ~ 50dB (1kHz ~ 10kHz)
Control Features	Shutdown	Protection Features	Over Current, Over Temperature
Operating Temperature	-40°C ~ 125°C	Mounting Type	Surface Mount
Base Product Number	LDS3985