|
|
PDF LFxxAB Data sheet ( Hoja de datos )
| Número de pieza | LFxxAB | |
| Descripción | Very low drop voltage regulators | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LFxxAB (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
LFxxAB
LFxxC
Very low drop voltage regulators with inhibit
Features
■ Very low dropout voltage (0.45V)
■ Very low quiescent current (typ. 50 µA in OFF
mode, 500 µA in ON mode)
www.DataSheet4U.com
■ Output current up to 500 mA
■ Logic-controlled electronic shutdown
■ Output voltages of 1.5; 1.8; 2.5; 2.7; 3; 3.3; 3.5;
5; 6; 8; 8.5; 9; 12V
■ Internal current and thermal limit
■ Only 2.2 µF for stability
■ Available in ± 1% (AB) or ± 2% (C) selection at
25°C
■ Supply voltage rejection: 80db (typ.)
■ Temperature range: -40 to 125°C
Description
The LFxxAB/LFxxC are very Low Drop regulators
available in PENTAWATT, TO-220, TO-220FP,
DPAK and PPAK package and in a wide range of
output voltages.
The very Low Drop voltage (0.45V) and the very
low quiescent current make them particularly
suitable for Low Noise, Low Power applications
and specially in battery powered systems.
TO-220
TO-220FP
PPAK
DPAK
PENTAWATT
In the 5 pins configuration (PENTAWATT and
PPAK) a Shutdown Logic Control function is
available (pin 2, TTL compatible). This means that
when the device is used as a local regulator, it is
possible to put a part of the board in standby,
decreasing the total power consumption. In the
three terminal configuration the device has the
same electrical performance, but is fixed in the
ON state. It requires only a 2.2 µF capacitor for
stability allowing space and cost saving.
Table 1. Device summary
LF15C
LF15AB
LF18C
LF18AB
LF25C
LF25AB
LF27C
LF27AB
LF30C
LF30AB
LF33C
LF33AB
LF35C
LF35AB
Order codes
LF40C
LF40AB
LF50C
LF50AB
LF60C
LF60AB
LF80C
July 2007
Rev. 18
LF80AB
LF85C
LF85AB
LF90C
LF90AB
LF120C
LF120AB
1/45
www.st.com
45
1 page  
LFxxAB - LFxxC
3 Maximum ratings
Maximum ratings
Table 2. Absolute maximum ratings
Symbol
Parameter
VI DC input voltage
IO Output current
PTOT
Power dissipation
TSTG
Storage temperature range
TOP Operating junction temperature range
www.DataSheet4U1.c.omFor 18 < VI < 40 the regulator is in shut-down
Value
-0.5 to 40(1)
Internally Limited
Internally Limited
-40 to 150
-40 to 125
Unit
V
°C
°C
Table 3. Thermal data
Symbol
Parameter
PENTAWATT
RthJC Thermal resistance junction-case
RthJA Thermal resistance junction-ambient
3
50
TO-220
3
50
TO-220FP DPAK/PPAK
58
60 100
Unit
°C/W
°C/W
Figure 3. Test circuit
5/45
5 Page 
LFxxAB - LFxxC
Electrical characteristics
Table 9.
Symbol
Electrical characteristics for LF25C (refer to the test circuits, TJ = 25°C, CI = 0.1 µF,
CO = 2.2 μF unless otherwise specified.)
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
IO = 50 mA, VI = 4.5 V
2.45 2.5 2.55
IO = 50 mA, VI = 4.5 V, Ta = -25 to 85°C 2.4
2.6
V
VI Operating input voltage IO = 500 mA
16 V
IO Output current limit
1A
ΔVO Line regulation
VI = 3.5 to 16 V, IO = 5 mA
2 12 mV
ΔVO Load regulation
www.DataSheet4U.com
Id Quiescent current
VI = 3.8 V, IO = 5 to 500 mA
VI = 3.5 to 16V, IO = 0mA
ON MODE
VI = 3.8 to 16V, IO=500mA
2 12 mV
0.5 1
mA
12
VI = 6 V
OFF MODE
50 100 µA
f = 120 Hz
82
SVR Supply voltage rejection IO = 5 mA, VI = 4.5 ± 1 V f = 1 KHz
77 dB
f = 10 KHz
65
eN Output noise voltage
B = 10 Hz to 100 KHz
50 µV
Vd Dropout voltage
VIL Control input logic low
VIH Control input logic high
II Control input current
CO
Output bypass
capacitance
IO = 200 mA
IO = 500 mA
Ta = -40 to 125°C
Ta = -40 to 125°C
VI = 6 V, VC = 6 V
ESR = 0.1 to 10 Ω, IO = 0 to 500 mA
0.2 0.35
0.4 0.7
V
0.8 V
2V
10 µA
2 10
µF
11/45
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LFxxAB.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LFxxAB | Very low drop voltage regulators | STMicroelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |