Power Module. LMZ10505 Datasheet

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LMZ10505 Datasheet
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Part LMZ10505
Description 5-A Power Module
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Texas Instruments LMZ10505
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
LMZ10505
SNVS633K – JANUARY 2010 – REVISED APRIL 2019
LMZ10505 5-A Power Module With 5.5-V Maximum Input Voltage
1 Features
1 Integrated Shielded Inductor
• Flexible Start-up Sequencing Using External Soft-
Start, Tracking, and Precision Enable
• Protection Against In-Rush Currents and Faults
such as Input UVLO and Output Short-Circuit
• Single Exposed Pad and Standard Pinout for Easy
Mounting and Manufacturing
• Pin-to-Pin Compatible With
– LMZ10503 (3-A/15-W Maximum)
– LMZ10504 (4-A/20-W Maximum)
• Fully Enable for WEBENCH® and Power Designer
• Electrical Specifications
– 25-W Maximum Total Output Power
– Up to 5-A Output Current
– Input Voltage Range 2.95 V to 5.5 V
– Output Voltage Range 0.8 V to 5 V
– ±1.63% Feedback Voltage Accuracy Over
Temperature
– Efficiency up to 96%
• Performance Benefits
– Operates at High Ambient Temperatures
– High Efficiency up to 96% Reduces System
Heat Generation
– Low Radiated Emissions (EMI) Tested to
EN55022 Class B Standard (EN 55022:2006,
+A1:2007, FCC Part 15 Subpart B: 2007. See
Table 9 and Layout for Information on Device
Under Test.)
– Passes 10-V/m Radiated Immunity EMI Tested
to Standard EN61000 4-3
– Fast Transient Response for Powering FPGAs
and ASICs
• Create a Custom Design Using the LMZ10505
With the WEBENCH® Power Designer
2 Applications
• Point-of-Load Conversions from 3.3-V and 5-V
Rails
• Space-Constrained Applications
• Noise-Sensitive Applications (Such as
Transceiver, Medical)
3 Description
The LMZ10505 power module is a complete, easy-to-
use, DC-DC solution capable of driving up to a 5-A
load with exceptional power conversion efficiency,
output voltage accuracy, line and load regulation. The
LMZ10505 is available in an innovative package that
enhances thermal performance and allows for hand
or machine soldering.
The LMZ10505 can accept an input voltage rail
between 2.95 V and 5.5 V and can deliver an
adjustable and highly accurate output voltage as low
as 0.8 V. One megahertz fixed-frequency PWM
switching provides a predictable EMI characteristic.
Two external compensation components can be
adjusted to set the fastest response time, while
allowing the option to use ceramic or electrolytic
output capacitors. Externally programmable soft-start
capacitor facilitates controlled start-up. The
LMZ10505 is a reliable and robust solution with the
following features: lossless cycle-by-cycle peak
current limit to protect for overcurrent or short-circuit
fault, thermal shutdown, input undervoltage lockout,
and prebiased start-up.
Device Information(1)(2)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMZ10505
TO-PMOD (7) 9.85 mm × 10.16 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) Peak reflow temperature equals 245°C. See Design Summary
LMZ1xxx and LMZ2xxx Power Module Family (SNAA214) for
more details.
VIN
Cin
Typical Application Circuit
6, 7
VOUT
1
VIN
EN
2
LMZ10505
5
FB
SS GND
3
CSS
4, EP
CO
Rfbt
Rfbb
Rcomp Ccomp
VOUT
Efficiency VOUT = 3.3 V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



Texas Instruments LMZ10505
LMZ10505
SNVS633K – JANUARY 2010 – REVISED APRIL 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 14
8.1 Application Information............................................ 14
8.2 Typical Application .................................................. 14
8.3 System Examples ................................................... 20
9 Power Supply Recommendations...................... 23
10 Layout................................................................... 23
10.1 Layout Guidelines ................................................. 23
10.2 Layout Examples................................................... 24
10.3 Estimate Power Dissipation and Thermal
Considerations ......................................................... 27
10.4 Power Module SMT Guidelines ............................ 28
11 Device and Documentation Support ................. 29
11.1 Device Support...................................................... 29
11.2 Documentation Support ........................................ 29
11.3 Receiving Notification of Documentation Updates 29
11.4 Community Resources.......................................... 29
11.5 Trademarks ........................................................... 31
11.6 Electrostatic Discharge Caution ............................ 31
11.7 Glossary ................................................................ 31
12 Mechanical, Packaging, and Orderable
Information ........................................................... 31
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision J (June 2016) to Revision K
Page
• Editorial changes only; no change to technical data ............................................................................................................. 1
Changes from Revision I (September 2015) to Revision J
Page
• Changed language of WEBENCH list item; added additional content and links for WEBENCH further in data sheet ......... 1
• Updated Equation 1 ............................................................................................................................................................. 10
Changes from Revision H (October 2013) to Revision I
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1
Changes from Revision G (April 2013) to Revision H
Page
• Deleted 10 mils....................................................................................................................................................................... 4
• Changed 10 mils................................................................................................................................................................... 23
• Changed 10 mils................................................................................................................................................................... 27
• Added Power Module SMT Guidelines................................................................................................................................. 28
2 Submit Documentation Feedback
Product Folder Links: LMZ10505
Copyright © 2010–2019, Texas Instruments Incorporated



Texas Instruments LMZ10505
www.ti.com
5 Pin Configuration and Functions
LMZ10505
SNVS633K – JANUARY 2010 – REVISED APRIL 2019
Exposed Pad
Connect to GND
NDW Package
7-Lead TO-PMOD
Top View
7
6
5
4
3
2
1
VOUT
VOUT
FB
GND
SS
EN
VIN
NAME
EN
PIN
NO.
2
Exposed Pad
FB
GND
SS
VIN
VOUT
5
4
3
1
6, 7
TYPE
Analog
Ground
Analog
Ground
Analog
Power
Power
Pin Functions
DESCRIPTION
Active-high enable input for the device.
Exposed pad is used as a thermal connection to remove heat from the device. Connect this
pad to the PCB ground plane in order to reduce thermal resistance value. EP must also
provide a direct electrical connection to the input and output capacitors ground terminals.
Connect EP to pin 4.
Feedback pin. This is the inverting input of the error amplifier used for sensing the output
voltage. Keep the copper area of this node small.
Power ground and signal ground. Provide a direct connection to the EP. Place the bottom
feedback resistor as close as possible to GND and FB pin.
Soft-start control pin. An internal 2-µA current source charges an external capacitor
connected between SS and GND pins to set the output voltage ramp rate during start-up.
The SS pin can also be used to configure the tracking feature.
Power supply input. A low-ESR input capacitance should be located as close as possible to
the VIN pin and exposed pad (EP).
The output terminal of the internal inductor. Connect the output filter capacitor between
VOUT pin and EP.
Copyright © 2010–2019, Texas Instruments Incorporated
Product Folder Links: LMZ10505
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