STMicroelectronics Manuals

The L6902D is a complete and simple step down switching regulator with adjustable current limit. Based on a voltage mode structure it integrates a current error amplifier to have a constant voltage and constant current control. By means of an on board current sense resistor and the availability of the current sense pins (both compatible to Vcc and for Cs- compatible with GND too) a current limit programming is very simple and accurate (±5%). Moreover constant current control can be used to charge NiMH and NiCd batteries. The device can be used as a standard DC/DC converter with adjustable current limit (set by using the external sense resistor). The internal robust P-channel DMOS transistor with a typical of 250 mΩ assures high efficiency.

The L5970D is a step-down switching regulator capable of delivering up to 1A output current and operating input voltage range from 4.4V to 36V. It uses an internal P-Channel D-MOS transistor as the switching element to minimize the size of external components. With a minimum input voltage of 4.4V, it is particularly suitable for 5V bus in computer-related applications. The device has a fixed switching frequency of 250KHz and operates at 100% duty cycle for low dropout operation. It also features various protections and synchronization.

L6932 is a 2A Ultra Low Drop Output linear regulator from STMicroelectronics. It operates from 2V to 14V and supports up to 2A. L6932 is available in 1.5V, 1.8V, 2.5V and adj version from 1.2V. L6932 provides 1% of output voltage accuracy, short circuit current limit at 2.5A within ±8%, and thermal shutdown function. It also supports enable and power good functions.

L6920 is a high efficiency step-up controller, requiring only three external components to realize the conversion from the battery voltage to the selected output voltage. The start up is guaranteed at 1V and the device is op- erating down to 0.6V. Internal synchronous rectifier is implemented with a 120mΩ P-channel MOSFET and, in order to improve the efficiency, a variable frequency control is imple- mented.

TS4041 is a low-power shunt voltage reference circuit that provides a stable 1.225V output voltage. It operates with very low current and is suitable for space-restricted designs.

The TS4040 is a low power shunt voltage reference providing a stable 2.5V output voltage over the industrial temperature range (-40°C to +85°C). It is available in SOT23-3 surface mount package and can be designed in applications where space saving is critical.

The LD1117Axx 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, 2.5 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.

This document describes the features and characteristics of the TS822 micropower shunt voltage reference, including a typical output voltage of 2.5V, ultra-low current consumption, high precision, and high stability.

The TS821 is a low power shunt voltage reference providing a stable 1.225V output voltage over the industrial temperature range (-40°C to +85°C). It has ultra low operating current, high precision, and stability, making it suitable for applications such as computers, instrumentation, battery chargers, switch mode power supply, and battery operated equipment.

The LM2931xx series regulators are very low drop regulators. The very low drop voltage and the low quiescent current make them particular suitable for low noise, low power applications and in battery- powered systems. The series features 0.15V typical dropout voltage and 2.5mA typical static current, output current up to 100mA. The series also features adjustable (from VOUT = 2.5V only SO-8) and fixed (3.3V and 5V) output voltage versions.

This document provides information on a product in full production, named LD1086xx, which is a low dropout positive voltage regulator. It can provide adjustable or fixed output voltage and has features such as low dropout, wide operating temperature range, and high output current up to 1.5A. It is suitable for automotive applications.

LD1085xx is a low dropout 3A adjustable and fixed output voltage positive voltage regulator.

L6598 is a high voltage resonant controller manufactured by STMicroelectronics with voltage ratings up to 600V, driver current capability of 250mA source, 450mA sink, switching times of 80/40ns rise/fall with 1nF load, CMOS shutdown input, undervoltage lockout, soft-start frequency shifting timing, sense op amp for closed loop control or protection features, high accuracy current controlled oscillator, integrated bootstrap diode and clamping on Vs.

The TSM111 is an integrated circuit that incorporates multiple sensing functions. It includes voltage references, comparators and matched resistors bridges for overcurrent and overvoltage detection without the need for any external components. It also provides a programmable delay function for controlling on and off delays. It can be used in power management systems for desktop computers to monitor currents and voltages and to generate power good signals to the system.