LT3032_15 Datasheet, PDF (1/24 Pages) Linear Technology – Dual 150mA Positive/Negative Low Noise Low Dropout Linear Regulator

LT3032 Series
Dual 150mA
Positive/Negative Low Noise
Low Dropout Linear Regulator
FEATURES
n _{Low Noise: 20µVRMS (Positive) and}
30µV_RMS (Negative)
n _{Low Quiescent Current: 30µA/Channel}
n _{Wide Input Voltage Range: ±2.3V to ±20V}
n _{Output Current: ±150mA}
n _{Low Shutdown Current: <3µA Total (Typical)}
n _{Low Dropout Voltage: 300mV/Channel}
n _{Fixed Output Voltages: ±3.3V, ±5V, ±12V, ±15V}
n _{Adjustable Outputs from ±1.22V to ±20V}
n _{No Protection Diodes Needed}
n _{Stable with 2.2µF Output Capacitors}
n _{Stable with Ceramic, Tantalum or Aluminum Capacitors}
n _{Starts into Reverse Output Voltage}
n _{Current Limit and Thermal Limit}
n _{Low Profile 14-Lead 4mm × 3mm × 0.75mm}
DFN Package
APPLICATIONS
n _{Battery-Powered Instruments}
n _{Bipolar Power Supplies}
n _{Low Noise Power Supplies}
DESCRIPTION
The LT^®3032 is a dual, low noise, positive and negative low
dropout voltage linear regulator. Each regulator delivers
up to 150mA with a typical 300mV dropout voltage. Each
regulator’s quiescent current is low (30µA operating and
<3µA in shutdown) and well-controlled in dropout, making
it an excellent choice for battery-powered circuits.
Another key feature of the LT3032 is low output noise.
Adding an external 10nF bypass capacitor to each regulator
reduces output noise to 20µV_RMS/30µV_RMS over a 10Hz to
100kHz bandwidth. The LT3032 is stable with minimum
output capacitors of 2.2µF. The regulators do not require
the addition of ESR as is common with other regulators.
The regulators are offered as adjustable output devices with
an output voltage down to the ±1.22V reference voltage or
in fixed voltages of ±3.3V, ±5V, ±12V and ±15V. Internal
protection circuitry includes reverse-output protection,
current limiting and thermal limiting.
The LT3032 is available in a unique low profile 14-lead
4mm × 3mm × 0.75mm DFN package with exposed back­
side pads for each regulator, allowing optimum thermal
performance.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
TYPICAL APPLICATION
Dual Polarity Low Noise 150mA Power Supply
5.4V TO
20V
<0.25V = OFF
>2V = ON
–5.4V TO
–20V
INP
OUTP
10µF LT3032-5
0.01µF
SHDNP
SHDNN
10µF
INN
BYPP
GND
BYPN
0.01µF
OUTN
3032 TA01
5V OUT AT 150mA
20µV_RMS NOISE
10µF
10µF
–5V OUT AT –150mA
30µV_RMS NOISE
10Hz to 100kHz Output Noise
OUTP
100µV/DIV
20µV_RMS
OUTN
100µV/DIV
1mS/DIV
30µV_RMS
3032 TA02a
For more information www.linear.com/LT3032
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