L4955V33 STMICROELECTRONICS [STMicroelectronics], L4955V33 Datasheet - Page 3

• Manufacturer Part Number: L4955V33
• Description: 5A ULDO LINEAR REGULATORS FAMILY
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

PIN FUNCTIONS
THERMAL DATA (HEPTAWATT & VERSAWATT packages)
L4955 - ELECTRICAL CHARACTERISTICS (T
(1) Output voltage connected to ADJ.
HW
= Specifications referred to T
1
2
3
4
5
6
7
Symbol
Symbol
R
R
V
V
V
th j-case
I
I
th j-amb
V
V
O
Q
IN
O
O
O
O
VW
1
–
–
2
–
–
3
Operating Supply Voltage
Output Voltage (1)
Line regulation
Load regulation (1)
Dropout Voltage
Current Limiting
Short Circuit Current
Programmable Current
Limiting
Quiescent Current
Stand By Current
Inhibit Threshold
Inhibit Hysteresis
Inhibit Bias Sink Current
Power Good Threshold
Power Good Hysteresis
Power Good Saturation
Ripple Rejection
Name
GND
OUT
ADJ
INH
PG
CL
IN
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
Thermal Shutdown
Thermal Hysteresis
Parameter
Unregulated input voltage; this pin must be bypassed with a capacitor larger than 10 F.
A resistor connected between this pin and ground sets the programmable current limiting
value. When the programmable current limiting is not used the pin must be connected to GND.
TTL-CMOS input. A logic high level on this input disables the device. An internal pull-down
insures full functionally even if the pin is open.
Ground.
The output is connected directly to this terminal for 1.26V operation; it is connected to the
output through a resistive divider for higher voltages.
Open drain output, this signal is low when the output voltage is lower than 90%, otherwise is high.
Regulated output voltage. A minimum bypass capacitor of 22 F is required to insure stability.
(1)
J
from 0 C to +125 C.
0.1A < I
4.5V < V
4.5V < V
0.1A < IO < 5A
I
V
I
V
R
R
0.1A < I
INH = 5V
Rising Edge
INH = 5V or 0.8V
Rising Edge
I
f = 120Hz, I
V
O
O
PG
Parameter
IN
O
IN
lim
lim
= 5A
= 2A
= 0V
= 4mA
= 6V
= 13k
= 47k
4.5V
O
O
Test Condition
IN
IN
< 5A; 4.5V < V
< 5A
< 12V; 0.1A < I
<22V; I
V
j
O
IN
= 25 C, V
= 5A
= 2V
O
PP
= 10mA
C
C
L
L
Function
in
IN
= 0
= 13k
= 12V, unless otherwise specified).
O
<12V
< 5A
Typ.
Typ.
Max.
Max.
1.235
1.222
Min.
2.55
0.70
5.1
1.1
4.5
60
0.9 x V
Value
Typ.
1.26
1.26
0.75
0.55
0.85
1.26
150
120
2.5
1.1
6.3
1.8
2.7
0.2
0.2
0.1
50
20
20
75
2
2
3
2
O
1.285
1.298
Max.
0.75
3.45
1.00
1.42
200
1.1
1.5
7.5
0.4
22
10
10
60
3
4
L4955
Unit
Unit
C/W
C/W
mV
mV
mA
mA
dB
V
V
V
V
V
V
A
A
A
A
V
V
V
V
V
C
C
A
A
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