Microcircuit  14461 represents a pulse raising regulator of a voltage for a feed of low-voltage loadings. It can be used as basic component DC/DC of converters in portable and stationary electronic devices of household and industrial purpose. DC/DC converters on its basis have high efficiency - up to 80 %.

   The microcircuit will transform an entrance voltage 0,9..5 In to one of the days off — 3,3 In or 5 Century.

   The current of loading of a microcircuit can reach 100 <. It has the detector of an entrance voltage and a source of a basic voltage that allows to build accordingly in converters of a voltage on its basis effective system of protection and to receive high stability of a target voltage.

   The microcircuit is made on  technologies in 8-2K2>4=>< plastic DIP the case such as 2101.8A.

Table 1

Number of a conclusion

The abbreviated name

Purpose of conclusions



The low level of a logic signal on an input of a microcircuit disconnects it and translates in a mode minimal power consumption.



Choice of a target voltage of a microcircuit
Output of a source of a basic voltage.



Incorporates through the condenser to the general wire



Output (open drain) detector of an entrance voltage. Unite with the general wire if the voltage on input LBI falls below 1,25 In



Input of the detector of an entrance voltage



Input of a feedback and a feed of a microcircuit



The general wire



Drain of the powerful key N-channel transistor




Fig. 1. The block diagram of a microcircuit

   Target voltage of a microcircuit (3,3 or 5 ) get out electric connection of its conclusion 3/5 (2K2. 2) accordingly to conclusion OUT (2K2. 6) or to general wire GND (2K2. 7).

   The block diagram of a microcircuit is shown fig. 1, and purpose of conclusions explains tab. 1.

Table 2



Value of parameters

Conditions of measurement of parameters

Target voltage, In Uout 5...5,2
U3/5 = 0B
U3/5=3 IN
The minimal voltage of start, In UINL 0,9...1 Without loading
The minimal entrance voltage UINL 0,9...1
Without loading
I2KE = 100
Current of consumption in a mode minimal M=5@3>?>B@51;5=8O, <: IINL <20,4 Ushdn = 0 IN
Voltage of a low level on output LBO, In ULBO <0,4 ILBO = 3 <
Current of outflow on output LBO, <: ILBO <1 ULBO = 5 IN
Low level on inputs SHND and 3/5, In USHNDL <0,4
High level on inputs SHND and 3/5, In USHNDH > 1,6
Threshold of operation of the detector of an entrance voltage, In ULBI 1,25 U3/5 = 0 IN

   The basic electric characteristics are resulted in tab. 2.

   Variant of the practical circuit of the converter of a voltage on microcircuit  14461 (UOUT = 5 ) it is shown on fig. 2.


Fig. 2. The circuit of the converter of a voltage on microcircuit  14461

   To the circuit on fig. 2 it is necessary to make the following explanatories:

·        In quality VD1 diode Shotki is established. Use usual rectify diodes can lead to to decrease in efficiency of the converter and increase in voltage UINL.

·        By development of the printed-circuit-board of the converter it is necessary to take into account, that the length of conductors from throttle L1 and diode VD1 to a conclusion of a microcircuit 8 should be minimal.

·        To use the panel    for connection with a microcircuit it is not recommended.

·        Throttle L1 should have high good quality and is reeled up by a wire in diameter not less than 0,5 mm on the probe  the core.

The primary Edit. 06.06. V.F.Gajnutdinov.

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