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LM2760 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM2760
Description  3.3V Regulated Switched Capacitor Voltage Converter
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2760 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LM2760
3.3V Regulated Switched Capacitor Voltage Converter
General Description
The LM2760 is a switched-capacitor DC/DC converter that
generates a regulated 3.3V output capable of driving a load
up to 20mA (V
IN
≥ 2.5V). The wide input voltage range
(2.0V-4.4V) allows this device to be powered from several
types of batteries, including single cell lithium-ion, two-cell
alkaline, nickel-metal-hydride, and nickel-cadmium. The
LM2760 solution does not require an inductor and needs
only three small external ceramic capacitors. The miniscule
quiescent current of the part, typically 10µA unloaded,
makes the LM2760 ideal for low-current standby power rails.
The LM2760 is a switched-capacitor circuit that is controlled
by a gated oscillator. Both a low-input-voltage boost mode
and high-input-voltage pass mode are implemented to opti-
mize efficiency over the full input voltage range.
Additional features of the LM2760 include thermal protection
and current limiting. The LM2760 is available in a small,
five-pin SOT-23 package.
Features
n
3.3V ± 4% Regulated Output
n
Ultralow Power: 10µA Typical Supply Current
n
Boost and Pass Modes for Improved Efficiency
n
Input Voltage Range: 2.0V to 4.4V
n
Output Current up to 20mA (V
IN
≥ 2.5V)
n
Output Current up to 10mA (V
IN
≥ 2.0V)
n
Inductorless solution
n
Small external parts count: 3 ceramic capacitors
n
750kHz Switching Frequency
n
SOT23-5 Package
n
Short-Circuit and Thermal Protection
Applications
n
Battery-Operated Devices
n
Cellular Phone
n
Standby Power Supply
n
Memory Keep-alive Power
Typical Application Circuit
20044301
December 2002
© 2002 National Semiconductor Corporation
DS200443
www.national.com


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