CSP-6

0

10

20

30

40

50

60

70

80

90

100

0.1

1

10

100

1000

I -LoadCurrent-mA

O

0

20

40

60

80

100

120

140

160

180

200

V =3.6V,

V =1.8V

I

O

Efficiency

PFM/PWMOperation

PowerLoss

PFM/PWMOperation

VIN

SW

FB

MODE

EN

GND

1.8V@350mA

C

2.2 F

I

m

TPS6261x

L

0.47 H

m

C

4.7 F

O

m

2.9V..5.5V

TPS62619, TPS62612

TPS62615, TPS62616

www.ti.com

SLVS936 – NOVEMBER 2009

350-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER

IN LOW PROFILE CHIP SCALE PACKAGING (HEIGHT < 0.4mm)

Check for Samples: TPS62619 TPS62612 TPS62615 TPS62616

1

FEATURES

23

•

90% Efficiency at 6MHz Operation

DESCRIPTION

•

31

μA Quiescent Current

The

TPS6261x

device

is

a

high-frequency

•

synchronous step-down dc-dc converter optimized for

•

6MHz Regulated Frequency Operation

battery-powered portable applications. Intended for

low-power applications, the TPS6261x supports up to

•

Best in Class Load and Line Transient

350-mA load current, and allows the use of low cost

•

±2% Total DC Voltage Accuracy

chip inductor and capacitors.

•

Automatic PFM/PWM Mode Switching

With a wide input voltage range of 2.3V to 5.5V, the

•

Low Ripple Light-Load PFM Mode

device supports applications powered by Li-Ion

•

batteries with extended voltage range. Different fixed

voltage output versions are available from 1.2V to

•

Internal Soft-Start, 100-

μs Start-Up Time

2.3V.

•

Integrated Active Power-Down Sequencing

(Optional)

The TPS6261x operates at a regulated 6-MHz

switching frequency and enters the power-save mode

•

Three Surface-Mount External Components

operation at light load currents to maintain high

Required (One 0603 MLCC Inductor, Two 0402

efficiency over the entire load current range.

Ceramic Capacitors)

The PFM mode extends the battery life by reducing

•

Complete Sub 0.4-mm Component Profile

the quiescent current to 31

μA (typ) during light load

Solution

operation.

For

low-frequency

noise-sensitive

•

applications, the device can be forced into fixed

•

Available in a 6-Pin NanoFree™ (CSP)

frequency PWM mode by pulling the MODE pin high.

Ultra-Thin Packaging

These features, combined with high PSRR and AC

load

regulation

performance,

make

this

device

suitable to replace a linear regulator to obtain better

APPLICATIONS

power conversion efficiency.

•

Cell Phones, Smart-Phones

The TPS6261x is available in an 6-pin thin chip-scale

•

WLAN, GPS and Bluetooth™ Applications

package (CSP, 0.4mm max. height).

•

DTV Tuner Applications

•

DC/DC Micro Modules

l

l

Figure 2. Efficiency vs. Load Current

Figure 1. Smallest Solution Size Application

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

NanoFree is a trademark of Texas Instruments.

3

Bluetooth is a trademark of Bluetooth SIG, Inc.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2009, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.