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PDF LM4128 Data sheet ( Hoja de datos )
| Número de pieza | LM4128 | |
| Descripción | SOT-23 Precision Micropower Series Voltage Reference | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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November 2006
LM4128
SOT-23 Precision Micropower Series Voltage Reference
General Description
Ideal for space critical applications, the LM4128 precision
voltage reference is available in the SOT-23 surface-mount
package. The LM4128’s advanced design eliminates the
need for an external stabilizing capacitor while ensuring sta-
bility with capacitive loads up to 10 µF, thus making the
LM4128 easy to use.
Series references provide lower power consumption than
shunt references, since they do not have to idle the maximum
possible load current under no load conditions. This advan-
tage, the low quiescent current (60 µA), and the low dropout
voltage (400 mV) make the LM4128 ideal for battery-powered
solutions.
The LM4128 is available in four grades (A, B, C, and D) for
greater flexibility. The best grade devices (A) have an initial
accuracy of 0.1% with guaranteed temperature coefficient of
75 ppm/°C or less, while the lowest grade parts (D) have an
initial accuracy of 1.0% and a tempco of 100 ppm/°C.
Features
■ Output voltage initial accuracy 0.1%
■ Low temperature coefficient 75 ppm/°C
■ Low Supply Current, 60 µA
■ Enable pin allowing a 3 µA shutdown mode
■ Up to 20 mA output current
■ Voltage options 1.8V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V
■ Custom voltage options available (1.8V to 4.096V)
■ VIN range of VREF + 400 mV to 5.5V @10 mA
■ Stable with low ESR ceramic capacitors
■ SOT23-5 Package
■ −40°C to 125°C junction temperature range
Applications
■ Instrumentation & Process Control
■ Test Equipment
■ Data Acquisition Systems
■ Base Stations
■ Servo Systems
■ Portable, Battery Powered Equipment
■ Automotive & Industrial
■ Precision Regulators
■ Battery Chargers
■ Communications
■ Medical Equipment
Typical Application Circuit
*Note: The capacitor CIN is required and the capacitor COUT is optional.
© 2006 National Semiconductor Corporation 202110
20211001
www.national.com
1 page  
Electrical Characteristics LM4128-2.5 (VOUT = 2.5V) Limits in standard type are for TJ = 25°C
only, and limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C unless otherwise specified.
Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most
likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified VIN = 5V and
ILOAD = 0A.
Symbol
Parameter
Conditions
Min Typ Max
(Note 4) (Note 5) (Note 4)
Unit
VREF
Output Voltage Initial Accuracy
LM4128A-2.5
(A Grade - 0.1%)
-0.1
+0.1
%
LM4128B-2.5
(B Grade - 0.2%)
-0.2 +0.2
LM4128C-2.5
(C Grade - 0.5%)
-0.5 +0.5
LM4128D-2.5
(D Grade - 1.0%)
-1.0 +1.0
TCVREF / °C (Note Temperature Coefficient
6)
LM4128A-2.5
LM4128B-2.5
LM4128C-2.5
75
75
ppm / °C
100
LM4128D-2.5
100
IQ Supply Current
60 100
IQ_SD
Supply Current in Shutdown
EN = 0V
37
ΔVREF/ΔVIN Line Regulation
VREF + 400 mV ≤ VIN ≤ 5.5V
50
ΔVREF/ΔILOAD Load Regulation
0 mA ≤ ILOAD ≤ 20 mA
25 120
ΔVREF
Long Term Stability (Note 7)
Thermal Hysteresis (Note 8)
1000 Hrs
-40°C ≤ TJ ≤ +125°C
50
75
VIN - VREF
Dropout Voltage (Note 9)
ILOAD = 10 mA
175 400
VN Output Noise Voltage
0.1 Hz to 10 Hz
275
ISC Short Circuit Current
75
VIL Enable Pin Maximum Low Input Level
35
VIH Enable Pin Minimum High Input Level
65
µA
µA
ppm / V
ppm / mA
ppm
mV
µVPP
mA
%V
%V
5 www.national.com
5 Page 
Load Transient Response
ILOAD = 0 to 10mA
Short-Circuit Protection and Recovery
20211050
Start-Up Response
20211082
20211083
11 www.national.com
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LM4128.PDF ] | |
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