Datasheet LM4130 (National Semiconductor) - 10
| Manufacturer | National Semiconductor |
| Description | Precision Micropower Low Dropout Voltage Reference |
| Pages / Page | 12 / 10 — Pin Functions. Voltage Reference with Complimentary Output. (Pin 5):. … |
| File Format / Size | PDF / 271 Kb |
| Document Language | English |
Pin Functions. Voltage Reference with Complimentary Output. (Pin 5):. REF. LM4130. (Pin 4):. Ground (Pin 2):. NC (Pins 1, 3):
Model Line for this Datasheet
- LM4130AIM5-2.0 LM4130AIM5-2.5 LM4130AIM5-4.1 LM4130AIM5X-2.0 LM4130AIM5X-2.5 LM4130AIM5X-4.1 LM4130BIM5-2.0 LM4130BIM5-2.5 LM4130BIM5-4.1 LM4130BIM5X-2.0 LM4130BIM5X-2.5 LM4130BIM5X-4.1 LM4130CIM5-2.0 LM4130CIM5-2.5 LM4130CIM5-4.1 LM4130CIM5X-2.0 LM4130CIM5X-2.5 LM4130CIM5X-4.1 LM4130DIM5-2.0 LM4130DIM5-2.5 LM4130DIM5-4.1 LM4130DIM5X-2.0 LM4130DIM5X-2.5 LM4130DIM5X-4.1 LM4130EIM5-2.0 LM4130EIM5-2.5 LM4130EIM5-4.1 LM4130EIM5X-2.0 LM4130EIM5X-2.5 LM4130EIM5X-4.1
Text Version of Document
Pin Functions Voltage Reference with Complimentary Output V (Pin 5):
Reference Output. The output of the LM4130
REF LM4130
can source up to 20 mA. It is stable with output capacitor ranges from 0 to 100 µF.
V (Pin 4):
Positive Supply. Bypassing with a 0.1µF capaci-
IN
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
DS101046-6
Output Capacitor Precision High Current Low Droput Regulator
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 /20mA and 100µF re- DS101046-7 REF spectively. Noise on the power-supply input can effect the output noise,
Precision Voltage Reference
but it can be reduced by using an optional bypass capacitor
with Force and Sense Output
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. DS101046-9
Typical Application Circuits Programmable Current Source Precision High Current Low Droput Regulator
DS101046-10 DS101046-4 www.national.com 10
Reference Output. The output of the LM4130
REF LM4130
can source up to 20 mA. It is stable with output capacitor ranges from 0 to 100 µF.
V (Pin 4):
Positive Supply. Bypassing with a 0.1µF capaci-
IN
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
DS101046-6
Output Capacitor Precision High Current Low Droput Regulator
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 /20mA and 100µF re- DS101046-7 REF spectively. Noise on the power-supply input can effect the output noise,
Precision Voltage Reference
but it can be reduced by using an optional bypass capacitor
with Force and Sense Output
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. DS101046-9
Typical Application Circuits Programmable Current Source Precision High Current Low Droput Regulator
DS101046-10 DS101046-4 www.national.com 10
