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LMZ22005 Datasheet(PDF) 19 Page - Texas Instruments

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Part # LMZ22005
Description  5A SIMPLE SWITCHER Power Module With 20-V Maximum Input Voltage
PDF  34 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LMZ22005 Datasheet(HTML) 19 Page - Texas Instruments

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ENABLE
2.0M
21 uA
INT-VCC (5V)
1.279V
RUN
RENB
12.7k
RENT
42.2k
VIN
100Ö
RENH
5.1V
P/O LMZ22005
LMZ22005
www.ti.com
SNVS686J – MARCH 2011 – REVISED AUGUST 2015
Typical Application (continued)
Figure 47. Enable Input Detail
8.2.2.3 Output Voltage Selection
Output voltage is determined by a divider of two resistors connected between VO and ground. The midpoint of
the divider is connected to the FB input.
The regulated output voltage determined by the external divider resistors RFBT and RFBB is:
VO = 0.8 V × (1 + RFBT / RFBB)
(4)
Rearranging terms; the ratio of the feedback resistors for a desired output voltage is:
RFBT / RFBB = (VO / 0.796 V) – 1
(5)
These resistors must generally be chosen from values in the range of 1.0 k
Ω to 10.0 kΩ.
For VO = 0.8 V the FB pin can be connected to the output directly and RFBB can be omitted.
Table 1 lists the values for RFBT , and RFBB.
Table 1. Typical Application Bill of Materials
REF DES
DESCRIPTION
CASE SIZE
MANUFACTURER
MANUFACTURER P/N
U1
SIMPLE SWITCHER
PFM-7
Texas Instruments
LMZ22005TZ
Cin1,5
0.047 µF, 50 V, X7R
1206
Yageo America
CC1206KRX7R9BB473
Cin2,3
10 µF, 50 V, X7R
1210
Taiyo Yuden
UMK325BJ106MM-T
Cin6 (OPT)
CAP, AL, 150 µF, 50 V
Radial G
Panasonic
EEE-FK1H151P
CO1,6
0.047 µF, 50 V, X7R
1206
Yageo America
CC1206KRX7R9BB473
CO2 (OPT)
100 µF, 6.3 V, X7R
1210
TDK
C3225X5R0J107M
CO5
220
μF, 6.3 V, SP-Cap
(7343)
Panasonic
EEF-UE0J221LR
RFBT
3.32 k
Ω
0805
Panasonic
ERJ-6ENF3321V
RFBB
1.07 k
Ω
0805
Panasonic
ERJ-6ENF1071V
RSN (OPT)
1.50 k
Ω
0805
Vishay Dale
CRCW08051K50FKEA
RENT
42.2 k
Ω
0805
Panasonic
ERJ-6ENF4222V
RENB
12.7 k
Ω
0805
Panasonic
ERJ-6ENF1272V
RFRA(OPT)
23.7
Ω
0805
Vishay Dale
CRCW080523R7FKEA
RENH
100
Ω
0805
Vishay Dale
CRCW0805100RFKEA
CFF
180 pF, ±10%, C0G, 50 V
0805
TDK
08055A181JAT2A
CSS
047
μF, ±10%, X7R, 16 V
0805
AVX
0805YC474KAT2A
D1(OPT)
5.1 V, 0.5 W
SOD-123
Diodes Inc.
MMSZ5231BS-7-F
Copyright © 2011–2015, Texas Instruments Incorporated
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