1
dc1622af
DEMO MANUAL DC1622A
DESCRIPTION
LT3032: Dual 150mA
Positive/Negative Low Noise
Low Dropout Linear Regulator
Demonstration circuit 1622A is a dual 150mA linear regula-
tor featuring the LT
®
3032. The LT3032 is a dual, positive
and negative low dropout linear regulator. Each regulator
supplies up to 150mA of output current with a typical 300mV
dropout voltage. Each regulator’s quiescent current is low
(<3μA total in shutdown) and well controlled in dropout,
making it an excellent choice for battery-powered circuits.
A 0.01μF bypass capacitor to each regulator reduces output
voltage noise to 20μV
RMS
(positive regulator)/30μV
RMS
(negative regulator) over a 10Hz to 100kHz bandwidth.
The LT3032 is stable with minimum output capacitor of
2.2μF. The regulators do not require any additional ESR.
Internal protection circuitry includes reverse output protec-
tion, current limiting and thermal limiting. Each regulator
L
, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
is offered as an adjustable output device with an output
voltage range down to the ±1.22V reference voltages.
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.
The LT3032 data sheet gives a complete description of
the part, operation and application information. The data
sheet must be read in conjunction with this quick start
guide for demo circuit 1622A.
Design files for this circuit board are available at
http://www.linear.com/demo
(T
A
= 25°C)
PARAMETER
CONDITION
VALUE
Minimum INP Input Voltage
I
LOAD
= 150mA
2.3V
Minimum INN Input Voltage
I
LOAD
= –150mA
–2.3V
Maximum Input Voltage
V
OUTP
= 5V, I
LOAD
= –150mA
20V
V
OUTN
= –5V, I
LOAD
= –90mA
–20V
Output Voltage V
OUT
J1, J2 Shunt in 7, 8
±4.989V ±3%
Maximum Output Current
V
INP
= 7V, V
OUTP
= 5V
150mA
V
INN
= –7V, V
OUTN
= –5V
–150mA
