LM4130 National Semiconductor, LM4130 Datasheet - Page 10

• Manufacturer Part Number: LM4130
• Description: Precision Micropower Low Dropout Voltage Reference
• Manufacturer: National Semiconductor

www.national.com
Pin Functions
V
can source up to 20 mA. It is stable with output capacitor
ranges from 0 to 100 µF.
V
tor is recommended if the output loading changes or input is
noisy.
Ground (Pin 2):Negative Supply or Ground Connection.
NC (Pins 1, 3):No Connection (internally terminated). These
pins must be left unconnected.
Application Information
Output Capacitor
The LM4130 is designed to operate with or without an output
capacitor and is stable with capacitive loads of up to 100µF.
Connecting a capacitor between the output and ground will
significantly improve the load transient response when
switching from a light load to a heavy load. However, the out-
put capacitor should not be made arbitrarily large because it
will effect the turn-on time as well as line and load transients.
Input Capacitor
A small 0.1µF capacitor on the input significantly improves
stability under a wide range of load conditions. With an input
bypass capacitor, the LM4130 will drive any combination of
resistance and capacitance up to V
spectively.
Noise on the power-supply input can effect the output noise,
but it can be reduced by using an optional bypass capacitor
between the input pin and the ground.
Printed Circuit Board Layout Consideration
References in SOT packages are generally less prone to as-
sembly stress than devices in Small Outline (SOIC) pack-
age.
To minimize the mechanical stress due to PC board mount-
ing that can cause the output voltage to shift from its initial
value, mount the reference on a low flex area of the PC
board, such as near the edge or a corner.
Typical Application Circuits
REF
IN
(Pin 4):Positive Supply. Bypassing with a 0.1µF capaci-
Precision High Current Low Droput Regulator
(Pin 5): Reference Output. The output of the LM4130
REF
/20mA and 100µF re-
DS101046-4
10
Voltage Reference with Complimentary Output
Precision High Current Low Droput Regulator
Programmable Current Source
with Force and Sense Output
Precision Voltage Reference
DS101046-10
DS101046-7
DS101046-6
DS101046-9