TS3300

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© 2013 Touchstone Semiconductor, Inc. All rights reserved.

FEATURES



Combines Low-power Boost + Low Dropout

Linear Regulator (LDO)

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Boost Regulator

x

Input Voltage: 0.6V- 4.5V

x

Output Voltage: 1.8V- 5.25V

x

Efficiency: Up to 84%

x

No-Load Supply Current: 3.5µA

x

x

Shutdown Control

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Anti-Crush Capability

x

Prevents Input Voltage Collapse when

powered with Weak/High Impedance

power Sources

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Single-Inductor, Discontinuous Conduction

Mode Scheme with Automatic Peak Current

Adjustment

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LDO

x

Adjustable LDO Output Voltage: 1.8V- 5V

x

Dropout Voltage: 255mV @ 100mA

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16-Pin, Low-Profile, Thermally-Enhanced

3mm x 3mm TQFN Package

APPLICATIONS

Coin Cell-Powered Portable Equipment

Single Cell Li-ion or Alkaline Powered Equipment

Solar or Mechanical Energy Harvesting

Wireless Microphones

Wireless Remote Sensors

RFID Tags

Blood Glucose Meters

Personal Health-Monitoring Devices

DESCRIPTION

The TS3300 is a 1st-generation Touchstone Semi

power

management

product

that

combines

a

high-efficiency boost regulator and a low dropout

linear regulator (LDO) in one package. The boost

regulator operates from a supply voltage as low as

an industry first. The TS3300 LDO’s input is

connected to the output of the boost regulator,

serving as a post-regulator for the boost, enabling a

number of useful functions such as a buck-boost

function. In power harvesting or peak load buffering

applications, the LDO may post-regulate voltage

buffered in a large capacitor or supercapacitor at

boost’s output. Finally, the LDO may be operated

simply as an on/off load switch. The LDO can deliver

up to 100mA output current at a dropout voltage of

255mV and reduce the ripple voltage out of the boost

regulator by a factor of 3.

The TS3300’s boost section includes an anti-crush

TM

feature to prevent the collapse of the input voltage to

the boost regulator when the input is a weak (high

impedance) source. If the input voltage drops below a

determined voltage threshold (settable by a resistor

divider), the boost regulator switching cycles are

paused,

effectively

limiting

the

minimum

input

voltage. Anti-crush

buffer capacitor at the boost’s output can service

burst loads, and the input source exhibits substantial

source impedance (such as with an old battery, or at

cold temperatures).

The TS3300 is fully specified over the -40°C to +85°C

temperature range and is available in a low-profile,

thermally-enhanced 16-pin 3x3mm TQFN package

with an exposed back-side paddle.

0.6-4.5VIN, 1.8-5.25VOUT, 3.5-µA, Low Input Voltage, High-Efficiency Boost + LDO

TYPICAL APPLICATION CIRCUIT

The Touchstone Semiconductor logo and “NanoWatt Analog” are registered trademarks of

Touchstone Semiconductor, Incorporated.

0.1

10

0

Boost Regulator

Efficiency vs Load Current

0.01

1

20

10

100

30

40

60

50

70

80

90

100

L: LPS4018-103ML

0.6-4.5VIN, 1.8-5.25VOUT, 3.5uA, Low Input Voltage, High-Efficiency Boost + LDO