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TS3300ITQ1633TP 数据表(PDF) 10 Page - Touchstone Semiconductor Inc

部件名 TS3300ITQ1633TP
功能描述  0.6-4.5VIN, 1.8-5.25VOUT, 3.5-uA, Low Input Voltage, High-Efficiency Boost LDO
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制造商  TOUCHSTONE [Touchstone Semiconductor Inc]
网页  http://www.touchstonesemi.com
标志 TOUCHSTONE - Touchstone Semiconductor Inc

TS3300ITQ1633TP 数据表(HTML) 10 Page - Touchstone Semiconductor Inc

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TS3300
Page 10
TS3300DS r1p0
RTFDS
BLOCK DIAGRAM
THEORY OF OPERATION
The TS3300 is a power management product that
combines a high-efficiency boost regulator and a
linear regulator into one package. It is the industry’s
1
st boost regulator + linear regulator where the boost
regulator can operate from supply voltages as low as
0.6V and can deliver at least 75mA at 1.2VBI and
3VBO. Under no-load conditions, the boost regulator
idles at 3.5µA. The internal, low-dropout linear
regulator is driven by the output of the boost
regulator. It 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.
BOOST REGULATOR
At start-up, an internal low voltage oscillator in the
start-up control circuitry drives the gate of the internal
FET to charge the load capacitor. Once the output
voltage reaches approximately 1.1V, the main control
circuitry starts to operate.
With an adjustable peak inductor current, the TS3300
can provide up to 84% efficiency with a 1.2VBI and
3VBO. Refer to Figure 1. The input and output supply
voltage range for the boost regulator is from 0.6V to
4.5V and 1.8V to 5.25V, respectively.
Figure 1: 1.2V Input to 3V Boost Regulator Output Voltage and to 1.8V LDO Output Voltage Circuit
boost regulator by a factor of 3.


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