IOUT (A)

1E-5

0.0001

0.001

0.01

0.1

1

4

0

10

20

30

40

50

60

70

80

90

100

D001

VIN = 4 V

VIN = 5 V

VIN = 6 V

VIN = 8 V

VIN = 10 V

VIN = 12 V

VIN = 15 V

TPS62135

SW

FB

VIN

FB2

MODE

PG

VOS

1 uH

EN

GND

SS/TR

22uF

10uF

VBAT = 3.0V to 17V

VOUT = 0.8V to 12V

VSEL

R

1

R

2

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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.

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

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.

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

Simplified Schematic

Efficiency vs Output Current for Vo = 3.3 V