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TPS621351 Datasheet Preview

TPS621351 Datasheet

High Accuracy 3-V to 17-V 4-A Step-Down Converters

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TPS62135, TPS621351
SLVSBH3B – JUNE 2016 – REVISED APRIL 2017
TPS62135, TPS621351 High Accuracy 3-V to 17-V 4-A Step-Down Converters
with DCS-Control™
1 Features
1 Output Voltage Accuracy ± 1% (PWM mode)
• Input Voltage Range: 3 V to 17 V
• Quiescent Current 18 µA Typ
• Output Voltage from 0.8 V to 12 V
• Adjustable Soft-Start
• Forced PWM or PWM/PFM operation
• Typical switching frequency of 2.5MHz in forced
PWM
• Precise ENABLE input allows
– User-Defined Undervoltage Lockout
– Exact Sequencing
• 100% Duty Cycle Mode
• Automatic Efficiency Enhancement AEE™
• DCS-Control™ Topology
• Available with Active Output Discharge
• Optional HICCUP Overcurrent Protection
• Power Good Output
• Available in 3-mm x 2-mm VQFN Package
2 Applications
• Standard 12-V Rail Supplies
• POL for Connected Standby Requirements
• POL Supply from Single or Multiple Li-Ion Battery
• Gaming Consoles, SSD Drives
• Mobile and Embedded Computers
VBAT = 3.0V to 17V
10uF
Simplified Schematic
TPS62135
VIN SW
VOS
EN
FB
1 uH
VSEL
PG
VOUT = 0.8V to 12V
R1
22uF
R
2
MODE
FB2
SS/TR
GND
Copyright © 2016, Texas Instruments Incorporated
1
3 Description
The TPS62135 and TPS621351 are high efficiency
and easy to use synchronous step-down DC-DC
converters, based on the DCS-Control™ Topology.
The devices wide input voltage range of 3-V to 17-V
makes it suitable for multi-cell Li-Ion as well as 12-V
intermediate supply rails. The devices provide 4-A
continuous output current. The TPS62135
automatically enters Power Save Mode at light loads
to maintain high efficiency across the whole load
range. With that, the device is well suited for
applications that require connected standby
performance, like ultra low power computers. With the
MODE pin set to low, the switching frequency of the
device is adapted automatically based on the input
and output voltage. This technique is called
Automatic Efficiency Enhancement (AEE™) and
maintains high conversion efficiency over the whole
operation range. It provides a 1% output voltage
accuracy in PWM mode and therefore enables the
design of a power supply with high output voltage
accuracy.
The device has a typical quiescent current of 18 µA.
In shutdown mode the current is typically 1 µA and
the output is actively discharged for TPS62135 while
the output voltage discharge feature is disabled in
TPS621351.
The TPS62135 is available as an adjustable version,
packaged in a 3-mm x 2-mm VQFN package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS62135
VQFN
3.00 mm x 2.00 mm
TPS621351
VQFN
3.00 mm x 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
space
Efficiency vs Output Current for Vo = 3.3 V
100
90
80
70
60
50
40
30
20
10
0
1E-5
0.0001
0.001
0.01
IOUT (A)
VIN = 4 V
VIN = 5 V
VIN = 6 V
VIN = 8 V
VIN = 10 V
VIN = 12 V
VIN = 15 V
0.1 1 4
D001
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.




etcTI

TPS621351 Datasheet Preview

TPS621351 Datasheet

High Accuracy 3-V to 17-V 4-A Step-Down Converters

No Preview Available !

TPS62135, TPS621351
SLVSBH3B – JUNE 2016 – REVISED APRIL 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information ................................................. 5
7.5 Electrical Characteristics........................................... 5
7.6 Typical Characteristics .............................................. 7
8 Parameter Measurement Information .................. 7
8.1 Schematic ................................................................. 7
9 Detailed Description .............................................. 8
9.1 Overview ................................................................... 8
9.2 Functional Block Diagram ......................................... 8
9.3 Feature Description................................................... 9
9.4 Device Functional Modes........................................ 10
10 Application and Implementation........................ 13
10.1 Application Information.......................................... 13
10.2 Typical Applications ............................................. 16
10.3 System Examples ................................................. 32
11 Power Supply Recommendations ..................... 36
12 Layout................................................................... 36
12.1 Layout Guidelines ................................................. 36
12.2 Layout Example .................................................... 36
12.3 Thermal Considerations ........................................ 37
13 Device and Documentation Support ................. 38
13.1 Device Support .................................................... 38
13.2 Receiving Notification of Documentation Updates 38
13.3 Related Links ........................................................ 38
13.4 Community Resources.......................................... 38
13.5 Trademarks ........................................................... 38
13.6 Electrostatic Discharge Caution ............................ 38
13.7 Glossary ................................................................ 38
14 Mechanical, Packaging, and Orderable
Information ........................................................... 39
4 Revision History
Changes from Revision A (September 2016) to Revision B
Page
• Deleted table note from Device Comparison Table ............................................................................................................... 3
• Changed Figure 6 to Figure 30 ........................................................................................................................................... 17
• Added Figure 72 .................................................................................................................................................................. 28
• Added Figure 74 .................................................................................................................................................................. 28
• Added Figure 76 .................................................................................................................................................................. 28
• Added Figure 78 .................................................................................................................................................................. 29
• Added Figure 80 .................................................................................................................................................................. 29
• Added Figure 81 .................................................................................................................................................................. 29
• Added Figure 82 .................................................................................................................................................................. 30
Changes from Original (June 2016) to Revision A
Page
• Changed from Product Preview to Production Data .............................................................................................................. 1
2 Submit Documentation Feedback
Copyright © 2016–2017, Texas Instruments Incorporated
Product Folder Links: TPS62135 TPS621351


Part Number TPS621351
Description High Accuracy 3-V to 17-V 4-A Step-Down Converters
Maker etcTI
Total Page 30 Pages
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