L4972A STMicroelectronics, L4972A Datasheet - Page 7

• Manufacturer Part Number: L4972A
• Description: IC REG SW 2A 5.1V-40V 20-DIP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4972A

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5.1 ~ 40 V
• Current - Output: 2A
• Frequency - Switching: 100kHz
• Voltage - Input: 15 ~ 50 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Power - Output: 5W
• Output Voltage: 50 V
• Mounting Style: Through Hole
• Input Voltage: 50V
• Output Current: 2A
• No. Of Outputs: 1
• Power Dissipation Pd: 5W
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +150°C
• Filter Terminals: Through Hole
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6698-5; L4972A

Table 5. Electrical Characteristcs (continued)
Refer to the test circuit, T
specified.
SOFT START (pin 8)
ERROR AMPLIFIER
RAMP GENERATOR (pin 18)
SYNC FUNCTION (pin 10)
RESET AND POWER FAIL FUNCTIONS
Symbol
SVR
V
I
V
I
V
V
I
V
V
V
V
V
I
V
V
V
V
-I
I
G
I
2SO
V
I
I
10H
20L
10L
t
2SI
I
7H
I
I
18
18
OS
7H
7L
W
9R
9F
2H
3S
8
7L
9
18
18
10
10
10
2L
3
8
V
Out Leak Current
Soft Start Source Current
Output Saturation Voltage
High Level Out Voltage
Low Level Out Voltage
Source Output Current
Sink Output Current
Input Bias Current
DC Open Loop Gain
Supply Voltage Rejection
Input Offset Voltage
Ramp Valley
Ramp Peak
Min. Ramp Current
Max. Ramp Current
Low Input Voltage
High Input voltage
Sync Input Current with Low
Input Voltage
Input Current with High
Input Voltage
Output Amplitude
Output Pulse Width
Rising Thereshold Voltage (pin 9) V
Falling Thereshold Voltage (pin 9) V
Delay High Threshold Volt.
Delay Low Threshold Volt.
Delay Source Current
Delay Source Sink Current
Output Saturation Voltage
Output Leak Current
Parameter
J
= 25°C, V
i
= 35V, R4 = 30KΩ, C9 = 2.7nF, f
V
V
V
R
S1 = A; I
V
V
I
I
I
I
S1 = B; R
S1 = A; R
15 < V
S1 = B; S2 = B
S1 = B; S2 = B
V
V
S1 = A; I
V
S1 = B; S2 = B; S4 = B
V
V
S1 = B; S2 = B
V
V
V
V
V
V
V
V
I
V
8
8
7
7
3
i
i
8
= 200µA; V
7
7
i
i
i
8
10
10
thr
i
4
i
4
i
4
4
4
3
S
= 100µA; S1 = C; V
= 20mA; V
= 100µA; S1 = C; V
= 15mA; S1 = B V
= 15 to 50V;V
= 55V; S3 = A; V
= 15V
= 45V
= 15V to 50V; V
= 15 to 50V
= 15 to 50V
= 15 to 50V
= 50Ω S1 = A
= 3V; V
= 1V; V
= 6V; V
= 0; S1 = B; S2 = B; S4 = B
= 5.3V
= 5.3V
= 5.3V; V
= 5.3V; V
= 4.7V; V
= 50V; S1 = A
= V
= 2.5V
= 2.5V
i
18
< 50V
Test Condition
17
17
= 0.9V; S4 = B;
S
S
9
7
9
= 100µA
= 1mA
= 10Ω
= 0V
= 10KΩ
= 4.7V
= 5.3V
9
2
2
11
11
= V
= 3V
= 3V
= 10V
= 10V
4
= 4.7V; V
13
8
8
= 0;
= 0
4
9
9
= 4.7V
= 5.3V
= 4.7V
9
= V
13
Min.
–0.3
-130
4.77
4.95
100
100
V
1.2
2.4
2.5
0.3
80
60
60
30
10
SW
6
4
1
ref
= 100KHz typ, unless otherwise
Typ.
-100
-200
115
150
150
270
V
V
0.4
1.5
2.5
5.5
2.7
0.5
5.1
1.1
80
60
2
5
ref
ref
Max.
-160
5.25
150
300
100
V
V
0.7
0.9
5.5
0.4
1.5
-80
0.4
1.2
0.8
1.2
10
80
2
1
3
ref
ref
Unit
mA
mV
mA
mA
mA
mV
mV
mA
µA
µA
µA
µA
dB
dB
µA
µA
µA
µs
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
L4972A
Fig.
12
13
13
13
14
14
14
14
14
14
14
14
12
12
12
12
12
12
12
12
12
15
15
15
15
15
15
15
15
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