L4972AD STMicroelectronics, L4972AD Datasheet - Page 6
![IC REG SW 2A 5.1-40V STDN 20SOIC](/photos/6/56/65691/497-20-soic__7_5mm_width__series_sml.jpg)
L4972AD
Manufacturer Part Number
L4972AD
Description
IC REG SW 2A 5.1-40V STDN 20SOIC
Manufacturer
STMicroelectronics
Type
Step-Down (Buck)r
Datasheet
1.L4972AD013TR.pdf
(22 pages)
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
497-4206-5
497-4207-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
L4972AD
Manufacturer:
STM
Quantity:
3 697
Part Number:
L4972AD
Manufacturer:
STM
Quantity:
20 000
Company:
Part Number:
L4972AD013TR
Manufacturer:
SII
Quantity:
4 466
Part Number:
L4972AD013TR
Manufacturer:
ST
Quantity:
20 000
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