TL5001A-Q1_15 Datasheet, PDF (14/19 Pages) Texas Instruments – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL5001A-Q1
SLVS603B – AUGUST 2005 – REVISED FEBRUARY 2009 .............................................................................................................................................. www.ti.com
APPLICATION INFORMATION
V_I
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
V_CC
5 _SCP
1
V_O
3
COMP
U1
TL5001A
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 TL5001A
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
A. Frequency = 200 kHz
B. Duty cycle = 90% max
C. Soft-start time constant (TC) = 5.6 ms
D. SCP TC = 70 ms
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%
14
Submit Documentation Feedback
Copyright © 2005–2009, Texas Instruments Incorporated
Product Folder Link(s): TL5001A-Q1