TPS62135 Datasheet, PDF (1/40 Pages) Texas Instruments – High Accuracy 3-V to 17-V 3.5-A Step-Down Converters with DCS-Control

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TPS62135, TPS621351
SLVSBH3A – JUNE 2016 – REVISED SEPTEMBER 2016
TPS62135, TPS621351 High Accuracy 3-V to 17-V 3.5-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
• 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
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 3.5-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.
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
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
14
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.