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LM27762DSST датащи(PDF) 1 Page - Texas Instruments

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номер детали LM27762DSST
подробное описание детали  LM27762 Low-Noise Positive and Negative Output Integrated Switched Capacitor Plus LDO
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

LM27762DSST датащи(HTML) 1 Page - Texas Instruments

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LM27762
VIN
C1-
C1+
PGOOD
EN+
EN-
CP
OUT+
FB+
GND
FB-
OUT-
C1
RPU
CCP
COUT+
COUT-
R1
R2
R3
R4
CVIN
2.7 V to 5.5 V
1.5 V to 5 V
-1.5 V to -5 V
Copyright © 2016, Texas Instruments Incorporated
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Folder
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.
LM27762
SNVSAF7 – JULY 2016
LM27762 Low-Noise Positive and Negative Output Integrated
Switched Capacitor Plus LDO
1
1 Features
1
Generates Low-Noise Adjustable Positive and
Negative Supply Voltages From ±1.5 V and ±5 V
Input Voltage Range 2.7 V to 5.5 V
±250-mA Output Current
Inverting Charge Pump Followed by Negative
LDO
2-MHz Low-Noise Fixed-Frequency Operation
2.5-
Ω Inverter Output Impedance, VIN = 5 V
LDO Dropout Voltage 30 mV at 100 mA,
VOUT = –5 V
390-µA Quiescent Current
Shutdown Quiescent Current to 0.5 µA (Typical)
Current Limit and Thermal Protection
Power Good pin (Active Low)
2 Applications
Hi-Fi Audio Headphone Amplifiers
Operational Amplifier Power Biasing
Powering Data Converters
Wireless Communication Systems
Interface Power Supplies
Handheld Instrumentation
3 Description
The LM27762 delivers very low-noise positive and
negative outputs that are adjustable between ±1.5 V
and ±5 V. Input-voltage range is from 2.7 V to 5.5 V,
and output current goes up to ±250 mA. The device
provides a small solution size with few external
components.
Negative
voltage
is
generated
by
a
regulated
switched-capacitor voltage inverter followed by a low-
noise negative LDO. The switched-capacitor voltage
inverter of the LM27762 device operates at 2-MHz
(typical)
switching
frequency
to
reduce
output
resistance and voltage ripple. Positive voltage is
generated from the input by a low-noise positive
LDO. With an operating current of only 390 µA and
0.5-µA
typical
shutdown
current,
the
LM27762
provides ideal performance for power amplifier and
DAC bias and other high-current, low-noise negative
voltage needs.
Positive and negative outputs of LM27762 have
dedicated enable inputs. These outputs support
independent timing for the positive and negative rails
for specific system power-sequence needs. Enable
inputs can be also shorted together and connected to
the input voltage. The LM27762 has an optional
Power Good feature.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM27762
WSON (12)
2.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic


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