TL5001 Datasheet, PDF (17/23 Pages) Texas Instruments – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL5001, TL5001A
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS084E – APRIL 1994 – REVISED OCTOBER 1999
APPLICATION INFORMATION
VI
5V
GND
C1 ⁺
100 µF
10 V
R1
470 Ω
Q1
TPS1101
L1
20 µH
C3
0.1 µF
C4
1 µF
+
C5
0.1 µF
R2
56 kΩ
R3
43 kΩ
2
VCC
5 _SCP
1
VO
3
COMP
U1
TL5001/A
6
DTC
7
RT
4
FB
GND
8
CR1
MBRS140T3
+
C2
100 µF
10 V
C6
0.012 µF
R4
5.1 kΩ
Partial Bill of Materials:
U1 TL5001/A
Q1 TPS1101
LI
CTX20-1 or
23 turns of #28 wire on
Micrometals No. T50-26B core
C1 TPSD107M010R0100
C2 TPSD107M010R0100
CR1 MBRS140T3
Texas Instruments
Texas Instruments
Coiltronics
AVX
AVX
Motorola
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
3.3 V
GND
R5
7.50 kΩ
1%
R7
2.0 kΩ
C7
0.0047 µF
R6
3.24 kΩ
1%
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