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LM2772 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM2772
Spiegazioni elettronici  LM2772 Low-Ripple Switched Capacitor Step-Down Regulator
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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LM2772 Scheda tecnica(HTML) 1 Page - Texas Instruments

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LM2772
VIN
VOUT
EN
Capacitors: 1 µF - TDK C1005X5R0J105K
4.7 µF - TDK C1608X5R0J475K
or equivalent
VIN = 3.0V to 5.5V
C1
1 µF
CIN
1 µF
COUT
4.7 µF
VOUT: 1.2V
IOUT up to 150 mA
High: ON
Low: Shutdown
C1+
C1-
GND
C2
1 µF
C2+
C2-
C3
1 µF
C3+
C3-
LM2772
www.ti.com
SNVS486B – DECEMBER 2006 – REVISED MAY 2013
LM2772 Low-Ripple Switched Capacitor Step-Down Regulator
Check for Samples: LM2772
1
FEATURES
DESCRIPTION
The LM2772 is a switched capacitor step-down
2
Low-Noise Fixed Frequency Operation
regulator that produces a 1.2V output. It is capable of
1.2V Output Voltage
supplying loads up to 150mA with 3% output voltage
3% Output Voltage Regulation
regulation over line, load, and temperature. The
LM2772 operates with an input voltage from 3.0V to
Li-Ion (3.6V) to 1.2V with 80% Efficiency
5.5V, accommodating 1-cell Li-Ion batteries and
Very Low Output Ripple: 8mV @ 150mA
chargers.
Output Currents up to 150mA
The LM2772 utilizes a highly efficient regulated multi-
2.7V to 5.5V Input Voltage Range
gain charge pump. Pre-regulated 1.1MHz fixed-
Shutdown Disconnects Load from VIN
frequency switching results in very low ripple and
noise on both the input and the output. When output
1.1MHz Switching Frequency
currents are low, the part automatically switches to a
No Inductors…Small Solution Size
low-ripple PFM regulation mode to maintain high
Short Circuit and Thermal Protection
efficiency over the entire load range.
WSON-10 Package (3mm × 3mm × 0.8mm)
The LM2772 is available in TI’s WSON-10 Package
(WSON-10).
APPLICATIONS
DSP, Memory, and Microprocessor Power
Supplies
Mobile Phones and Pagers
Portable Electronic Devices
Typical Application Circuit
Figure 1.
Figure 2. LM2772 Efficiency vs.
Low-Dropout Linear Regulator (LDO) Efficiency
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
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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