L4972 STMicroelectronics, L4972 Datasheet - Page 9

• Manufacturer Part Number: L4972
• Description: 2A SWITCHINGREGULATOR
• Manufacturer: STMicroelectronics

RESET AND POWER FAIL FUNCTIONS
ELECTRICAL CHARACTERISTICS (continued)
TYPICAL PERFORMANCES (using evaluation board) :
n = 83% (V
V
Line regulation = 12mV (V
Load regulation = 7mV (I
for component values Refer to the fig. 5 (Part list).
o RIPPLE
Symbo l
I
V
V
V
V
V
V
V
I
2SO
2SI
I
I
9R
2H
4R
4H
9F
2L
3S
3
4
= 30mV (at 1A)
i
Rising Thereshold Voltage
(pin 9)
Falling Thereshold Voltage
(pin 9)
Delay High Threshold Volt.
Delay Low Threshold Volt.
Delay Source Current
Delay Source Sink Current
Output Saturation Voltage
Output Leak Current
Rising Threshold Voltage
Hysteresis
Input Bias Current
= 35V ; V
Parameter
o
= VREF ; I
o
i
= 0.5 to 2A)
= 15 to 50V)
o
= 2A ; f
V
V
Vi = 15 to 50V
V
Vi = 15 to 50V
V
Vi = 15 to 50V
V
V
V
I
V3 = 50V; S1 = A
V9 = V
3
i
4
4
4
4
4
4
= 15mA; S1 = B V
= 15 to 50V
= 5.3V
= 5.3V
= 5.3V V
= 4.7V V
= 5.3V;
= 4.7V; V
T est Co nd itions
sw
13
= 100KHz)
2
V
9
9
= 3V
2
= V
= V
= 3V
13
13
4
= 4.7V
Min.
-130
4.77
4.95
4.95
V
0.4
30
10
1
ref
T yp.
-100
-200
Vref
V
5.1
1.1
5.1
0.5
60
1
ref
Max.
-160
5.25
5.25
100
V
V
-80
1.2
0.4
0.6
L4972A-L4972AD
80
3
ref
ref
Unit
mV
mV
mA
V
V
V
V
V
V
V
A
A
A
Fig .
7D
7D
7D
7D
7D
7D
7D
7D
7D
7D
7D
9/23
F