Very low drop voltage regulators with inhibit
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 V
packages
■ 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: 80 db (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 (0.45
V) and the very low quiescent current make them
particularly suitable for low noise, low power
applications and specially in battery powered
systems. 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,
in DPAK and PPAK
OUT
LFxxAB
LFxxC
TO-220
DPAKPPAK
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. 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.
TO-220FP
PENTAWATT
Table 1. Device summary
Part numbers
LF15AB LF25C LF33AB LF60C LF80AB LF90C LF120AB
LF18C LF25AB LF50C LF60AB LF85C LF90AB
LF18AB LF33C LF50AB LF80C LF85AB LF120C
November 2010 Doc ID 2574 Rev 24 1/50
www.st.com
50
Contents LFxxAB, LFxxC
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2/50 Doc ID 2574 Rev 24
LFxxAB, LFxxC List of tables
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Electrical characteristics for LF15AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 5. Electrical characteristics for LF18AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Electrical characteristics for LF18C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 7. Electrical characteristics for LF18CDT-TRY (Automotive Grade). . . . . . . . . . . . . . . . . . . . 11
Table 8. Electrical characteristics for LF25AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 9. Electrical characteristics for LF25ABDT-TRY (Automotive Grade). . . . . . . . . . . . . . . . . . . 13
Table 10. Electrical characteristics for LF25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 11. Electrical characteristics for LF25CDT-TRY (Automotive Grade) . . . . . . . . . . . . . . . . . . . . 15
Table 12. Electrical characteristics for LF33AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 13. Electrical characteristics for LF33C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 14. Electrical characteristics for LF33CDT-TRY and LF33CPT-TRY (Automotive Grade) . . . . 18
Table 15. Electrical characteristics for LF50AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 16. Electrical characteristics for LF50ABDT-TRY (Automotive Grade). . . . . . . . . . . . . . . . . . . 20
Table 17. Electrical characteristics for LF50C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 18. Electrical characteristics for LF50CDT-TRY and LF50CPT-TRY (Automotive Grade) . . . . 22
Table 19. Electrical characteristics for LF60AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 20. Electrical characteristics for LF60C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 21. Electrical characteristics for LF80AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 22. Electrical characteristics for LF80C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 23. Electrical characteristics for LF80CDT-TRY (Automotive Grade) . . . . . . . . . . . . . . . . . . . . 27
Table 24. Electrical characteristics for LF85AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 25. Electrical characteristics for LF85C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 26. Electrical characteristics for LF85CDT-TRY and LF85CPT-TRY (Automotive Grade) . . . . 30
Table 27. Electrical characteristics for LF90AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 28. Electrical characteristics for LF90C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 29. Electrical characteristics for LF120AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 30. Electrical characteristics for LF120C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 31. TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 32. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 33. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Doc ID 2574 Rev 24 3/50
List of figures LFxxAB, LFxxC
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Dropout voltage vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 5. Dropout voltage vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 6. Supply current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 7. Supply current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 8. Short circuit current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 9. Supply current vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 10. Logic controlled precision 3.3 / 5.0 V selectable output . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 11. Sequential multi-output supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 12. Multiple supply with ON / OFF toggle switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 13. Basic inhibit functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 14. Delayed turn-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 15. Low voltage bulb blinker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 16. Drawing dimension TO-220 (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 17. Drawing dimension TO-220 (type STD-ST Single Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 18. Drawing dimension tube for TO-220 Dual Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 19. Drawing dimension tube for TO-220 Single Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . 42
4/50 Doc ID 2574 Rev 24
LFxxAB, LFxxC Diagram
1 Diagram
Figure 1. Block diagram
Doc ID 2574 Rev 24 5/50
Pin configuration LFxxAB, LFxxC
2 Pin configuration
Figure 2. Pin connections (top view)
TO-220
PPAK
TO-220FP
DPAK
PENTAWATT
6/50 Doc ID 2574 Rev 24
LFxxAB, LFxxC Maximum ratings
3 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
I
I
O
P
TOT
T
STG
T
OP
1. For 18 < VI < 40 the regulator is in shut-down
DC input voltage -0.5 to 40
Output current Internally limited
Power dissipation Internally limited
Storage temperature range -40 to 150 °C
Operating junction temperature range -40 to 125 °C
Table 3. Thermal data
Symbol Parameter PENTAWATT TO-220 TO-220FP DPAK/PPAK Unit
(1)
V
R
R
Figure 3. Test circuit
Thermal resistance junction-case 3 5 5 8 °C/W
thJC
Thermal resistance junction-ambient 50 50 60 100 °C/W
thJA
Doc ID 2574 Rev 24 7/50
Electrical characteristics LFxxAB, LFxxC
4 Electrical characteristics
Refer to the test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified.
Table 4. Electrical characteristics for LF15AB
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection IO = 5 mA, VI = 3.5 ± 1 V
I
= 50 mA, VI = 3.5 V 1.485 1.5 1.515
Output voltage
O
= 50 mA, VI = 3.5 V, Ta = -25 to 85°C 1.470 1.530
I
O
V
Operating input voltage IO = 500 mA 2.5 16 V
Output current limit 1 A
Line regulation VI = 2.5 to 16 V, IO = 5 mA 2 10 mV
Load regulation VI = 2.8 V, IO = 5 to 500 mA 2 10 mV
Quiescent current
= 2.5 to 16V, IO = 0mA
V
I
= 2.8 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 100 µA
V
I
ON MODE
0.5 1
mA
f = 120 Hz 82
dBf = 1 kHz 77
f = 10 kHz 65
eN Output noise voltage B = 10 Hz to 100 kHz 50 µV
Dropout voltage IO = 200 mA 1 V
V
d
Control input logic low Ta = -40 to 125°C 0.8 V
V
IL
V
Control input logic high Ta = -40 to 125°C 2 V
IH
Control input current VI = 6 V, VC = 6 V 10 µA
I
I
Output bypass
C
O
capacitance
ESR = 0.1 to 10 Ω, I
= 0 to 500 mA 2 10 µF
O
8/50 Doc ID 2574 Rev 24
LFxxAB, LFxxC Electrical characteristics
Refer to the test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified.
Table 5. Electrical characteristics for LF18AB
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection IO = 5 mA, VI = 3.5 ± 1 V
I
= 50 mA, VI = 3.3 V 1.782 1.8 1.818
Output voltage
O
= 50 mA, VI = 3.3 V, Ta = -25 to 85°C 1.764 1.836
I
O
V
Operating input voltage IO = 500 mA 3 16 V
Output current limit 1 A
Line regulation VI = 2.8 to 16 V, IO = 5 mA 2 12 mV
Load regulation VI = 3.3 V, IO = 5 to 500 mA 2 10 mV
Quiescent current
= 2.5 to 16V, IO = 0mA
V
I
= 3.1 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 100 µA
V
I
ON MODE
0.5 1
mA
f = 120 Hz 82
dBf = 1 kHz 77
f = 10 kHz 60
eN Output noise voltage B = 10 Hz to 100 kHz 50 µV
Dropout voltage IO = 200 mA 0.7 V
V
d
Control input logic low Ta = -40 to 125°C 0.8 V
V
IL
V
Control input logic high Ta = -40 to 125°C 2 V
IH
Control input current VI = 6 V, VC = 6 V 10 µA
I
I
Output bypass
C
O
capacitance
ESR = 0.1 to 10 Ω, I
= 0 to 500 mA 2 10 µF
O
Doc ID 2574 Rev 24 9/50
Electrical characteristics LFxxAB, LFxxC
Refer to the test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified.
Table 6. Electrical characteristics for LF18C
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection IO = 5 mA, VI = 3.5 ± 1 V
I
= 50 mA, VI = 3.5 V 1.764 1.8 1.836
Output voltage
O
= 50 mA, VI = 3.5 V, Ta = -25 to 85°C 1.728 1.872
I
O
V
Operating input voltage IO = 500 mA 3 16 V
Output current limit 1 A
Line regulation VI = 2.8 to 16 V, IO = 5 mA 2 12 mV
Load regulation VI = 3.3 V, IO = 5 to 500 mA 2 10 mV
Quiescent current
= 2.5 to 16V, IO = 0mA
V
I
= 3.1 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 100 µA
V
I
ON MODE
0.5 1
mA
f = 120 Hz 82
dBf = 1 kHz 77
f = 10 kHz 60
eN Output noise voltage B = 10 Hz to 100 kHz 50 µV
Dropout voltage IO = 200 mA 0.7 V
V
d
Control input logic low Ta = -40 to 125°C 0.8 V
V
IL
V
Control input logic high Ta = -40 to 125°C 2 V
IH
Control input current VI = 6 V, VC = 6 V 10 µA
I
I
Output bypass
C
O
capacitance
ESR = 0.1 to 10 Ω, I
= 0 to 500 mA 2 10 µF
O
10/50 Doc ID 2574 Rev 24
LFxxAB, LFxxC Electrical characteristics
Refer to the test circuits, TA = -40 to 125°C, CI = 0.1 µF, CO = 2.2 µF unless otherwise
specified.
Table 7. Electrical characteristics for LF18CDT-TRY (Automotive Grade)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection
I
= 50 mA, VI = 3.5 V, Ta = 25°C 1.764 1.8 1.836
Output voltage
O
= 50 mA, VI = 3.5 V 1.713 1.887
I
O
V
Operating input voltage IO = 500 mA 3 16 V
Output current limit Ta = 25°C 1 A
Line regulation VI = 2.8 to 16 V, IO = 5 mA 2 15 mV
Load regulation VI = 3.3 V, IO = 5 to 500 mA 2 15 mV
Quiescent current
= 2.5 to 16V, IO = 0mA
V
I
= 3.1 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 120 µA
V
I
ON MODE
0.5 2
mA
f = 120 Hz 82
= 5 mA, VI = 3.5 ± 1 V
I
O
= 25°C
T
a
dBf = 1 kHz 77
f = 10 kHz 60
eN Output noise voltage B = 10 Hz to 100 kHz, T
I
= 200 mA 0.2 1.3
V
Dropout voltage
d
V
Control input logic low 0.8 V
IL
Control input logic high 2 V
V
IH
Control input current VI = 6 V, VC = 6 V, Ta = 25°C 10 µA
I
I
Output bypass
C
O
capacitance
O
= 500 mA 0.4 1.3
I
O
ESR = 0.1 to 10 Ω, I
= 25°C 50 µV
a
= 0 to 500 mA 2 10 µF
O
V
Doc ID 2574 Rev 24 11/50
Electrical characteristics LFxxAB, LFxxC
Refer to the test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified.
Table 8. Electrical characteristics for LF25AB
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection IO = 5 mA, VI = 4.5 ± 1 V
I
= 50 mA, VI = 4.5 V 2.475 2.5 2.525
Output voltage
O
= 50 mA, VI = 4.5 V, Ta = -25 to 85°C 2.450 2.550
I
O
V
Operating input voltage IO = 500 mA 16 V
Output current limit 1 A
Line regulation VI = 3.5 to 16 V, IO = 5 mA 2 12 mV
Load regulation VI = 3.8 V, IO = 5 to 500 mA 2 12 mV
Quiescent current
= 3.5 to 16V, IO = 0mA
V
I
= 3.8 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 100 µA
V
I
ON MODE
0.5 1
mA
f = 120 Hz 82
dBf = 1 kHz 77
f = 10 kHz 65
eN Output noise voltage B = 10 Hz to 100 kHz 50 µV
I
= 200 mA 0.2 0.35
V
Dropout voltage
d
V
Control input logic low Ta = -40 to 125°C 0.8 V
IL
Control input logic high Ta = -40 to 125°C 2 V
V
IH
Control input current VI = 6 V, VC = 6 V 10 µA
I
I
Output bypass
C
O
capacitance
O
= 500 mA 0.4 0.7
I
O
ESR = 0.1 to 10 Ω, I
= 0 to 500 mA 2 10 µF
O
V
12/50 Doc ID 2574 Rev 24
LFxxAB, LFxxC Electrical characteristics
Refer to the test circuits, TA = -40 to 125°C, CI = 0.1 µF, CO = 2.2 µF unless otherwise
specified.
Table 9. Electrical characteristics for LF25ABDT-TRY (Automotive Grade)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection
I
= 50 mA, VI = 4.5 V, Ta = 25°C 2.475 2.5 2.525
Output voltage
O
= 50 mA, VI = 4.5 V 2.435 2.565
I
O
V
Operating input voltage IO = 500 mA 16 V
Output current limit Ta = 25°C 1 A
Line regulation VI = 3.5 to 16 V, IO = 5 mA 2 15 mV
Load regulation VI = 3.8 V, IO = 5 to 500 mA 2 15 mV
Quiescent current
= 3.5 to 16V, IO = 0mA
V
I
= 3.8 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 120 µA
V
I
ON MODE
0.5 2
mA
f = 120 Hz 82
= 5 mA, VI = 4.5 ± 1 V
I
O
= 25°C
T
a
dBf = 1 kHz 77
f = 10 kHz 65
eN Output noise voltage B = 10 Hz to 100 kHz, T
I
= 200 mA 0.2 1.3
V
Dropout voltage
d
V
Control input logic low 0.8 V
IL
Control input logic high 2 V
V
IH
Control input current VI = 6 V, VC = 6 V, Ta = 25°C 10 µA
I
I
Output bypass
C
O
capacitance
O
= 500 mA 0.4 1.3
I
O
ESR = 0.1 to 10 Ω, I
= 25°C 50 µV
a
= 0 to 500 mA 2 10 µF
O
V
Doc ID 2574 Rev 24 13/50
Electrical characteristics LFxxAB, LFxxC
Refer to the test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified.
Table 10. Electrical characteristics for LF25C
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection IO = 5 mA, VI = 4.5 ± 1 V
I
= 50 mA, VI = 4.5 V 2.45 2.5 2.55
Output voltage
O
= 50 mA, VI = 4.5 V, Ta = -25 to 85°C 2.4 2.6
I
O
V
Operating input voltage IO = 500 mA 16 V
Output current limit 1 A
Line regulation VI = 3.5 to 16 V, IO = 5 mA 2 12 mV
Load regulation VI = 3.8 V, IO = 5 to 500 mA 2 12 mV
Quiescent current
= 3.5 to 16V, IO = 0mA
V
I
= 3.8 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 100 µA
V
I
ON MODE
0.5 1
mA
f = 120 Hz 82
dBf = 1 kHz 77
f = 10 kHz 65
eN Output noise voltage B = 10 Hz to 100 kHz 50 µV
I
= 200 mA 0.2 0.35
V
Dropout voltage
d
V
Control input logic low Ta = -40 to 125°C 0.8 V
IL
Control input logic high Ta = -40 to 125°C 2 V
V
IH
Control input current VI = 6 V, VC = 6 V 10 µA
I
I
Output bypass
C
O
capacitance
O
= 500 mA 0.4 0.7
I
O
ESR = 0.1 to 10 Ω, I
= 0 to 500 mA 2 10 µF
O
V
14/50 Doc ID 2574 Rev 24
LFxxAB, LFxxC Electrical characteristics
Refer to the test circuits, TA = -40 to 125°C, CI = 0.1 µF, CO = 2.2 µF unless otherwise
specified.
Table 11. Electrical characteristics for LF25CDT-TRY (Automotive Grade)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
V
I
I
O
ΔV
O
ΔV
O
I
d
SVR Supply voltage rejection
I
= 50 mA, VI = 4.5 V, Ta = 25°C 2.45 2.5 2.55
Output voltage
O
= 50 mA, VI = 4.5 V 2.385 2.615
I
O
V
Operating input voltage IO = 500 mA 16 V
Output current limit Ta = 25°C 1 A
Line regulation VI = 3.5 to 16 V, IO = 5 mA 2 15 mV
Load regulation VI = 3.8 V, IO = 5 to 500 mA 2 15 mV
Quiescent current
= 3.5 to 16V, IO = 0mA
V
I
= 3.8 to 16V, IO=500mA 12
V
I
= 6 V OFF MODE 50 120 µA
V
I
ON MODE
0.5 2
mA
f = 120 Hz 82
= 5 mA, VI = 4.5 ± 1 V
I
O
= 25°C
T
a
dBf = 1 kHz 77
f = 10 kHz 65
eN Output noise voltage B = 10 Hz to 100 kHz, T
I
= 200 mA 0.2 1.3
V
Dropout voltage
d
V
Control input logic low 0.8 V
IL
Control input logic high 2 V
V
IH
Control input current VI = 6 V, VC = 6 V, Ta = 25°C 10 µA
I
I
Output bypass
C
O
capacitance
O
= 500 mA 0.4 1.3
I
O
ESR = 0.1 to 10 Ω, I
= 25°C 50 µV
a
= 0 to 500 mA 2 10 µF
O
V
Doc ID 2574 Rev 24 15/50
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