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TC110333ECT Datasheet(PDF) 8 Page - Microchip Technology

Part # TC110333ECT
Description  PFM/PWM Step-Up DC/DC Controller
PDF  16 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC110333ECT Datasheet(HTML) 8 Page - Microchip Technology

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TC110
DS21355B-page 8
© 2002 Microchip Technology Inc.
4.0
APPLICATIONS
4.1
Circuit Examples
Figure 4-1 shows a TC110 operating as a 100kHz
bootstrapped regulator with soft start. This circuit uses
an NPN switching transistor (Zetex FZT690B) that has
an hFE of 400 and VCESAT of 100 mV at IC = 1A. Other
high beta transistors can be used, but the values of RB
and CB may need adjustment if hFE is significantly
different from that of the FZT690B.
Figure 4-2 and Figure 4-3 both utilize an N-channel
switching transistor (Silconix Si9410DY). This transistor
is a member of the LittlefootTM family of small outline
MOSFETs. The circuit of Figure 4-2 operates in
bootstrapped mode, while the circuit of Figure 4-3
operates in non-bootstrapped mode.
TABLE 4-1:
SUGGESTED COMPONENTS AND SUPPLIERS
Type
Inductors
Capacitors
Diodes
Transistors
Surface Mount
Sumida
CD54 Series (300kHz)
CD75 (100kHz)
Coiltronics
CTX Series
Matsuo
267 Series
Sprague
595D Series
Nichicon
F93 Series
Nihon
EC10 Series
Matsushita
MA735 Series
N-channel
Silconix
Si9410DY
ON Semiconductor
MTP3055EL
MTD20N03
Through-Hole
Sumida
RCH855 Series
RCH110 Series
Renco
RL1284-12
Sanyo
OS-CON Series
Nichicon
PL Series
ON Semiconductor
1N5817 - 1N5822
NPN
Zetex
ZTX694B



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