TS3300 Datasheet, PDF (1/14 Pages) Touchstone Semiconductor Inc – 0.6-4.5VIN, 1.8-5.25VOUT, 3.5-uA, Low Input Voltage, High-Efficiency Boost + LDO

TS3300
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FEATURES
 Combines Low-power Boost + Low Dropout
Linear Regulator (LDO)
 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 Delivers >100mA at 1.8V_BO from 1.2V_BI
x Shutdown Control
 Anti-Crush Capability
x Prevents Input Voltage Collapse when
powered with Weak/High Impedance
power Sources
 Single-Inductor, Discontinuous Conduction
Mode Scheme with Automatic Peak Current
Adjustment
 LDO
x Adjustable LDO Output Voltage: 1.8V- 5V
x Dropout Voltage: 255mV @ 100mA
 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
TYPICAL APPLICATION CIRCUIT
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
0.6V and can deliver at least 75mA at 1.2V_BI to 3V_BO,
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^TM is useful in applications where a
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.
Boost Regulator
Efficiency vs Load Current
100
9800
1.2VBI to 1.8VBO
70
1.2VBI to 3VBO
60
50
40
3200
10
The Touchstone Semiconductor logo and “NanoWatt Analog” are registered trademarks of
Touchstone Semiconductor, Incorporated.
L: LPS4018-103ML
0
0.01 0.1
1
10
100
IBO - mA
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© 2013 Touchstone Semiconductor, Inc. All rights reserved.