LMZ10504EXT_15 Datasheet, PDF (14/36 Pages) Texas Instruments – 4A SIMPLE SWITCHER Power Module With 5.5-V Maximum Input Voltage for Demanding and Rugged Applications

LMZ10504EXT
SNVS670H – JUNE 2010 – REVISED SEPTEMBER 2015
8 Application and Implementation
www.ti.com
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The LMZ10504EXT is a step-down DC-to-DC power module. It is typically used to convert a higher DC voltage to
a lower DC voltage with a maximum output current of 4 A. The following design procedure can be used to select
components for the LMZ10504EXT. Alternately, the WEBENCH software may be used to generate complete
designs. When generating a design, the WEBENCH software uses iterative design procedure and accesses
comprehensive databases of components. Please go to www.ti.com for more details.
8.2 Typical Application
This section provides several application solutions with an associated bill of materials. The compensation for
each solution was optimized to work over the full input range. Many applications have a fixed input voltage rail. It
is possible to modify the compensation to obtain a faster transient response for a given input voltage operating
point.
V_IN
C_in1
U1
1
VIN
6, 7
VOUT
2 _{EN LMZ10504EXT}
FB ⁵
C_O1
V_OUT
SS
GND
3
4, EP
C_SS
R_fbb
R_fbt
Rcomp C_comp
Figure 21. Typical Application Schematic
8.2.1 Design Requirements
For this example the following application parameters exist.
• V_IN = 5 V
• V_OUT = 2.5 V
• I_OUT = 4 A
• ΔV_OUT = 20 mV_pk-pk
• ΔV_{o_tran} = ±20 mV_pk-pk
Table 1. Bill of Materials, V_IN = 3.3 V to 5 V, V_OUT = 2.5 V, I_{OUT (MAX)} = 4 A, Optimized for Electrolytic Input
and Output Capacitance
DESIGNATOR
U1
C_in1
C_O1
R_fbt
R_fbb
DESCRIPTION
SIMPLE SWITCHER
150 µF, 6.3 V, 18 mΩ
330 µF, 6.3 V, 18 mΩ
100 kΩ
47.5 kΩ
CASE SIZE
PFM-7
C2, 6.0 × 3.2 × 1.8 mm
D3L, 7.3 × 4.3 × 2.8
mm
0603
0603
MANUFACTURER
Texas Instruments
Sanyo
Sanyo
Vishay Dale
Vishay Dale
MANUFACTURER P/N
LMZ10504EXTTZ
6TPE150MIC2
6TPE330MIL
CRCW0603100KFKEA
CRCW060347K5FKEA
QUANTITY
1
1
1
1
1
14
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