Datasheet

TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084F – APRIL 1994 – REVISED JANUARY 2002
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
U1
TL5001/A
FB
COMP
V
O
DTC
RT
GND
C1
100 µF
10 V
V
I
5 V
+
R1
470 Ω
SCP
V
CC
L1
20 µH
C2
100 µF
10 V
3.3 V
GND
+
CR1
MBRS140T3
Q1
TPS1101
C6
0.012 µF
R4
5.1 kΩ
R5
7.50 kΩ
1%
R2
56 kΩ
R3
43 kΩ
R6
3.24 kΩ
1%
C5
0.1 µF
C4
1 µF
C3
0.1 µF
GND
8
7
6
5
2
1
3
4
Partial Bill of Materials:
U1 TL5001/A Texas Instruments
Q1 TPS1101 Texas Instruments
LI CTX20-1 or Coiltronics
23 turns of #28 wire on
Micrometals No. T50-26B core
C1 TPSD107M010R0100 AVX
C2 TPSD107M010R0100 AVX
CR1 MBRS140T3 Motorola
R7
2.0 kΩ
C7
0.0047 µF
+
NOTES: A. Frequency = 200 kHz
B. Duty cycle = 90% max
C. Soft-start time constant (TC) = 5.6 ms
D. SCP TC = 70 msA
Figure 21. Step-Down Converter