TC105 Datasheet, PDF (7/14 Pages) Microchip Technology – PFM/PWM Step-Down DC/DC Controller

TC105
FIGURE 4-3:
V_IN
2.5V
REGULATOR USING PNP TRANSISTOR
+
10µF
16V ^–
FZ749
Q1
22µH
Sumida CD-54
MA737
+ _47µF
– ^{10V Tantalum}
C_B ⁺
2200 pF –
R_B
500
+
5
4_–
V_OUT
SHDN/SS
TC105
EXT ^VDD
GND
V_OUT
1.8V
R_SS
470K
OFF _ON
C_SS
0.033µF
1
2
3
FIGURE 4-4:
REGULATOR USING P-CHANNEL MOSFET
V_IN
10µF ⁺
16V –
Si9430
P
22µH
Sumida CD-54
MA737
5
+
–
47µF
10V Tantalum
V_OUT
R_SS
470K
OFF _ON
+ _CSS
4
– ^0.033µF
V_OUT
SHDN/SS
TC105
EXT ^VDD
GND
1
2
3
TABLE 4-1: SUGGESTED COMPONENTS AND SUPPLIERS
Type
Surface Mount
Miniature
Through-Hole
Standard
Through-Hole
Inductors
Sumida
CD54 Series
CDRH Series
Coilcraft
DO Series
Capacitors
AVX
TPS Series
Sprague
595D Series
Sumida
RCH Series
Coilcraft
PCH Series
Coiltronics
CTX Series
Sanyo
OS-CON Series
Nichicon
PL Series
United Chemi-Con
LXF Series
Diodes
ON Semiconductor
MBRS340T3
Nihon
NSQ Series
Matsushita
MA737
IRC
OAR Series
Transistors
Silconix
Little Foot MOSFET Series
Zetex FZT749
PNP Bipolar Transistor
Toshiba 2SA1213 PNP
Transistor
ON Semiconductor
TMOS Power MOSFETs
(i.e., MTP30P06V)
© 2002 Microchip Technology Inc.
DS21349B-page 7