L4987CXX120
L4987
SERIES
VERY LOW DROP VOLTAGE REGULATORS
WITH INHIBIT AND DROPOUT CONTROL FLAG
■VERY LOW DROPOUT VOLTAGE (0.25V TYP.)
■DROPOUT CONTROL FLAG
■VERY LOW QUIESCENT CURRENT
■(TYP. 90 mA IN OFF MODE, 500mA IN ON MODE)
■OUTPUT CURRENT UP TO 200 mA
■LOGIC-CONTROLLED ELECTRONIC SHUTDOWN
■OUTPUT VOLTAGES OF 3V, 3.3V, 5V, 8.7V, 12V
■INTERNAL CURRENT AND THERMAL LIMIT
■ONLY 2.2µF FOR STABILITY
■AVAILABLE IN ± 2% SELECTION AT 25°C
■SUPPLY VOLTAGE REJECTION: 70dB (TYP.)
DESCRIPTION
The L4987 is a very low drop regulator available in PPAK. The very low drop-voltage (0.5V Max at 200 mA) and the very low quiescent current make it particularly suitable for low noise, low power applications, and in battery powered systems. The input dump protection up to 40V makes it ideal for automotive applications. a shutdown Logic Control function is available (pin2, TTL compatible). This means that when the device is used as a local regulator, it is possible to put a part
SCHEMATIC DIAGRAM
PPAK
of the board in standby, decreasing the total power consumption. The regulator employs an output pin (open collector) providing a logic signal when the pass transistor is in saturation at low input voltage, this signal can be used to prevent the pop-up phenomenon in the car radio. In battery powered systems (the cellular phone, notebook) it is possible to use the flag to monitor the battery charge status through the dropout of the regulator.
June 2003 |
1/13 |
L4987 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter² |
Value |
Unit |
|
|
|
|
VI |
DC Input Voltage |
40 |
V |
IO |
Output Current |
Internally Limited |
|
Ptot |
Power Dissipation |
Internally Limited |
|
Tstg |
Storage Temperature Range |
-40 to 150 |
°C |
Top |
Operating Junction Temperature Range |
-40 to 125 |
°C |
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
THERMAL DATA
Symbol |
Parameter |
PPAK |
Unit |
|
|
|
|
Rthj-case |
Thermal Resistance Junction-case |
8 |
°C/W |
Rthj-amb |
Thermal Resistance Junction-ambient |
100 |
°C/W |
CONNECTION DIAGRAM (top view)
ORDERING CODES
TYPE |
OUTPUT VOLTAGE |
|
|
L4987CPT30 (*) |
3.0 V |
|
|
L4987CPT33 (*) |
3.3 V |
|
|
L4987CPT50 (*) |
5.0 V |
|
|
L4987CPT87 (*) |
8.7 V |
|
|
L4987CPT120 (*) |
12 V |
|
|
(*) Available even in tape & reel.
2/13
L4987 SERIES
ELECTRICAL CHARACTERISTICS OF L4987CPT30 (refer to the test circuits, VI = 6V, IO = 5mA, TJ = 25°C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified)
Symbol |
Parameter |
Test Conditions |
Min. |
Typ. |
Max. |
Unit |
|||
|
|
|
|
|
|
|
|
||
VO |
Output Voltage |
IO = 200 mA VI = 6 V |
|
2.94 |
3 |
3.06 |
V |
||
|
|
IO = 200 mA VI = 6V |
TJ=-40 to 125°C |
2.88 |
|
3.12 |
|
||
VI |
Operating Input Voltage |
IO = 200 mA |
|
|
|
3.62 |
|
18 |
V |
Iout |
Output Current Limit |
|
|
|
|
250 |
|
|
A |
VO |
Line Regulation |
VI = 4.3 to 18 V |
IO = 0.5 mA |
|
2.4 |
14 |
mV |
||
VO |
Load Regulation |
VI = 4.1 V |
IO = 0.5 to 200 mA |
|
3 |
20 |
mV |
||
Id |
Quiescent Current |
VI = 4.3 to 18 V |
IO = 0 mA |
|
0.7 |
1 |
mA |
||
|
ON MODE |
|
|
|
|
|
|
|
|
|
VI = 4.3 to 18 V |
IO = 200 mA |
|
1.5 |
6 |
|
|||
|
|
|
|
||||||
|
OFF MODE |
VI = 12 V |
|
|
|
|
90 |
180 |
µA |
SVR |
Supply Voltage Rejection |
IO = 5 mA |
|
f = 120 Hz |
|
80 |
|
dB |
|
|
|
VI = 5.3 ± 1 V |
|
f = 1 KHz |
|
75 |
|
|
|
|
|
|
|
f = 10 KHz |
|
60 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Vd |
Dropout Voltage |
IO = 200 mA |
|
|
|
|
0.25 |
0.5 |
V |
|
|
IO = 200 mA |
TJ=-40 to 125°C |
|
|
0.7 |
|
||
VIL |
Control Input Logic Low |
TJ= -40 to 125°C |
|
|
|
|
|
0.8 |
V |
VIH |
Control Input Logic High |
TJ= -40 to 125°C |
|
|
|
2 |
|
|
V |
II |
Control Input Current |
|
|
|
|
|
10 |
|
µA |
CO |
Output Bypass Capacitance |
ESR = 0.5 to 10 Ω |
|
IO = 0 to 200 mA |
2 |
10 |
|
µF |
|
|
|
TJ= -40 to 125°C |
|
|
|
|
|
|
|
VFL |
Control Flag Output Low |
VI - VO < VCESAT power, |
IFL = 6mA |
|
|
0.5 |
V |
||
|
|
IO = 200mA |
|
|
|
|
|
|
|
IFH |
Control Flag Output High |
VI > 3.62 V, |
VOH = 15 V |
|
|
10 |
µA |
||
|
Leakage Current |
|
|
|
|
|
|
|
|
3/13
L4987 SERIES
ELECTRICAL CHARACTERISTICS OF L4987CPT33 (refer to the test circuits, VI = 6.3V, IO = 5mA, TJ = 25°C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified)
Symbol |
Parameter |
Test Conditions |
Min. |
Typ. |
Max. |
Unit |
|||
|
|
|
|
|
|
|
|
||
VO |
Output Voltage |
IO = 200 mA VI = 6.3 V |
|
2.88 |
3.3 |
3.066 |
V |
||
|
|
IO = 200 mA VI = 6.3 V |
TJ=-40 to 125°C |
2.76 |
|
3.432 |
|
||
VI |
Operating Input Voltage |
IO = 200 mA |
|
|
|
4 |
|
18 |
V |
Iout |
Output Current Limit |
|
|
|
|
250 |
|
|
A |
VO |
Line Regulation |
VI = 4.6 to 18 V |
IO = 0.5 mA |
|
2.4 |
14 |
mV |
||
VO |
Load Regulation |
VI = 4.4 V |
IO = 0.5 to 200 mA |
|
3 |
20 |
mV |
||
Id |
Quiescent Current |
VI = 4.6 to 18 V |
IO = 0 mA |
|
0.7 |
1 |
mA |
||
|
ON MODE |
|
|
|
|
|
|
|
|
|
VI = 4.6 to 18 V |
IO = 200 mA |
|
1.5 |
6 |
|
|||
|
|
|
|
||||||
|
OFF MODE |
VI = 12 V |
|
|
|
|
90 |
180 |
µA |
SVR |
Supply Voltage Rejection |
IO = 5 mA |
|
f = 120 Hz |
|
80 |
|
dB |
|
|
|
VI = 5.6 ± 1 V |
|
f = 1 KHz |
|
75 |
|
|
|
|
|
|
|
f = 10 KHz |
|
60 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Vd |
Dropout Voltage |
IO = 200 mA |
|
|
|
|
0.25 |
0.5 |
V |
|
|
IO = 200 mA |
TJ=-40 to 125°C |
|
|
0.7 |
|
||
VIL |
Control Input Logic Low |
TJ= -40 to 125°C |
|
|
|
|
|
0.8 |
V |
VIH |
Control Input Logic High |
TJ= -40 to 125°C |
|
|
|
2 |
|
|
V |
II |
Control Input Current |
|
|
|
|
|
10 |
|
µA |
CO |
Output Bypass Capacitance |
ESR = 0.5 to 10 Ω |
|
IO = 0 to 200 mA |
2 |
10 |
|
µF |
|
|
|
TJ= -40 to 125°C |
|
|
|
|
|
|
|
VFL |
Control Flag Output Low |
VI - VO < VCESAT power, |
IFL = 6mA |
|
|
0.5 |
V |
||
|
|
IO = 200mA |
|
|
|
|
|
|
|
IFH |
Control Flag Output High |
VI > 4 V, |
VOH = 15 V |
|
|
10 |
µA |
||
|
Leakage Current |
|
|
|
|
|
|
|
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4/13