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PDF LF120AB Data sheet ( Hoja de datos )

Número de pieza LF120AB
Descripción Very low drop voltage regulator
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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No Preview Available ! LF120AB Hoja de datos, Descripción, Manual

LFXX
Very low drop voltage regulator with inhibit function
Datasheet - production data
Features
Very low-dropout voltage (0.45 V)
Very low quiescent current (typ. 50 µA in
OFF mode, 500 µA in ON mode)
Output current up to 500 mA
Logic-controlled electronic shutdown
Output voltages of 1.5; 1.8; 2.5; 3.3; 4.7; 5;
6; 8; 8.5; 9; 12 V
Automotive grade product: 1.8 V, 2.5 V,
3.3 V, 5.0 V, 8.0 V, 8.5 V VOUT in DPAK and
PPAK packages
Internal current and thermal limit
Only 2.2 µF for stability
Available in ±1% (AB), ±1.5% (AC) or
±2% (C) selection at 25 °C
Supply voltage rejection: 80 db (typ.)
Temperature range: from -40 to 125 °C
Description
The LFXX is a very low drop regulator available
in TO-220, TO-220FP, DPAK and PPAK
packages and in a wide range of output voltages.
The low drop voltage (0.45 V) and low quiescent
current make it particularly suitable for low-noise,
low-power applications and especially in battery-
powered systems. In the 5 pin configuration
(PPAK) a shutdown logic control function is
available (pin 2, TTL compatible). This means
that when the device is used as a local regulator,
a part of the board can be put in standby,
decreasing the total power consumption. In the
three terminal configuration, the device has the
same electrical performance, but it is fixed in ON
state. It requires a capacitor of only 2.2 µF for
stability, saving board space and costs. The
LFXX is available as automotive grade in DPAK
and PPAK packages, for the options of output
voltages whose commercial part numbers are
shown in the order codes. These devices are
qualified according to the specification
AEC-Q100 of the automotive market, in the
temperature range -40 °C to 125 °C, and the
statistical tests PAT, SYL, SBL are performed.
May 2017
DocID2574 Rev 31
This is information on a product in full production.
1/53
www.st.com

1 page




LF120AB pdf
LFXX
3
Maximum ratings
Maximum ratings
Symbol
VI
IO
PTOT
TSTG
TOP
Table 1: Absolute maximum ratings
Parameter
Value
DC input voltage
-0.5 to 40(1)
Output current
Internally limited
Power dissipation
Internally limited
Storage temperature range
-40 to 150
Operating junction temperature range
-40 to 125
Notes:
(1)For 18 < VI < 40 the regulator is in shutdown.
Unit
V
A
W
°C
°C
Symbol
RthJC
RthJA
Table 2: Thermal data
Parameter
TO-220 TO-220FP
Thermal resistance junction-case
Thermal resistance junction-ambient
5
50
5
60
DPAK/PPAK
8
100
Unit
°C/W
°C/W
Figure 3: Test circuit
DocID2574 Rev 31
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LF120AB arduino
LFXX
Electrical characteristics
Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise
specified.
Table 8: LF25AB (automotive grade) electrical characteristics
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
VO Output voltage
VI Operating input voltage
IO Output current limit
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
SVR Supply voltage rejection
IO = 50 mA
VI = 4.5 V
Ta = 25 °C
IO = 50 mA
VI = 4.5 V
IO = 500 mA
Ta = 25 °C
VI = 3.5 to 16 V
IO = 5 mA
VI = 3.8 V
IO = 5 to 500 mA
VI = 3.5 to 16 V
IO = 0 mA
VI = 3.8 to 16 V
IO = 500 mA
VI = 6 V
IO = 5 mA
VI = 4.5 ± 1 V
Ta = 25 °C
ON mode
OFF mode
f = 120 Hz
f = 1 kHz
f = 10 kHz
2.475
2.435
2.5 2.525
V
2.565
16 V
1A
2 15 mV
2 15 mV
0.5 2
mA
12
50 120 µA
82
77 dB
65
eN Output noise voltage
Vd Dropout voltage
VIL Control input logic low
VIH Control input logic high
II Control input current
CO
Output bypass
capacitance
B = 10 Hz to 100 kHz
Ta = 25 °C
IO = 200 mA
IO = 500 mA
VI = 6 V
VC = 6 V
Ta = 25 °C
ESR = 0.1 to 10 Ω
IO = 0 to 500 mA
50 µV
0.2 1.3
0.4 1.3
V
0.8 V
2V
10 µA
2 10
µF
DocID2574 Rev 31
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