L4972AD STMicroelectronics, L4972AD Datasheet - Page 6

• Manufacturer Part Number: L4972AD
• Description: IC REG SW 2A 5.1-40V STDN 20SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4972AD

• 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: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Power - Output: 3.75W
• Output Voltage: 40 V
• Output Current: 2 A
• Input Voltage: 15 V to 50 V
• Switching Frequency: 90 KHz to 110 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 90 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4206-5; 497-4206-5; 497-4207-5

L4972A
4
Table 5. Electrical Characteristcs
Refer to the test circuit, T
specified.
6/22
DYNAMIC CHARACTERISTICS
(*) Only for DIP version (**) Pulse testing with a low duty cycle
Vref SECTION (pin 13)
V
DC CHARACTERISTICS
∆V
Symbol
V
I
START
I
∆
13 short
14 short
V
I
SVR
∆V
∆V
∆V
∆V
∆f/T
11 Hyst
∆V
∆V
11OQ
f
I
I
V
V
f/
13
max
11Q
V
V
20L
11on
V
η
f
∆
13
14
Electrical Characteristcs
o
d
13
13
14
14
i
o
o
/
Vi
∆T Average Temperature
j
SECTION (pin 15)
Input Volt. Range (pin 11)
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage between Pin
11 and 20
Max Limiting Current
Efficiency (*)
Supply Voltage Ripple Rejection V
Switching Frequency
Voltage Stability of Switching
Frequency
Temperature Stability of
Switching Frequency
Maximum Operating Switching
Frequency
Reference Voltage
Line Regulation
Load Regulation
Coefficient Reference Voltage
Short Circuit Current Limit
Reference Voltage
Line Regulation
Load Regulation
Short Circuit Current Limit
Turn-on Threshold
Turn-off Hysteresys
Quiescent Current
Operating Supply Current
Parameter
J
= 25°C, V
i
= 35V, R4 = 30KΩ, C9 = 2.7nF, f
V
V
V
V
I
V
I
V
V
I
V
V
f = 100Hz; V
V
T
V
I
V
I
T
V
V
I
V
V
V
o
o
o
o
13
14
j
j
o
i
o
i
o
i
o
o
o
i
i
o
i
13
i
15
8
8
= 0.5A; V
= 2A
= 2A, f = 100KHz
= 2A C9= 2.2nF
=15V to 50V I
=15V to 50V
= 0 to 125°C
= 0°C to 125°C
= 15 to 50V
= 15V to 50V
= Vref to 40V
= 2V
= 15V to 45V
= V
= 15V to 50V
= V
= V
= 12V
= V
= V
= 0 to 1mA
= 0 to 1mA
= 0; S1 = D
= 0; S1 = B; S2 = B
= 0
= 0V
ref
ref
ref
ref
ref
RMS
Test Condition
R
I
to 40V I
o
4
= 0.5A to 2A
; I
o
= 15KΩ
= V
o
o
= V
= 1A
ref
o
o
ref
= 1A;
= 2A (**)
Min.
11.4
200
2.5
15
75
56
90
10
SW
5
5
= 100KHz typ, unless otherwise
Typ.
0.25
100
5.1
2.8
5.1
0.4
0.6
20
50
11
16
12
85
90
60
10
70
12
80
13
7
2
1
1
Max.
12.6
110
200
0.4
5.2
3.5
5.2
1.4
50
30
20
25
40
12
19
23
6
mV/°C
Unit
KHz
KHz
mV
mV
mV
mV
mA
mV
mA
mA
mA
dB
%
%
%
%
V
V
V
A
V
V
V
V
V
Fig.
10
10
10
10
10
10
10
10
10
12
12
12
12
8
8
8
8
8
8
8