L4971D013TR STMicroelectronics, L4971D013TR Datasheet - Page 5

• Manufacturer Part Number: L4971D013TR
• Description: IC REG STEP DOWN 1.5A 16-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4971D013TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3 ~ 50 V
• Current - Output: 1.5A
• Frequency - Switching: 100kHz ~ 300kHz
• Voltage - Input: 8 ~ 55 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Power - Output: 800mW
• Output Voltage: 50 V
• Mounting Style: SMD/SMT
• For Use With: 497-4744 - BOARD EVAL FOR L4971/L4978 REG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3357-2

Table 6. Typical Performance (Using Evaluation Board) fsw = 100kHz
Figure 4. Test and valuation board circuit.
Figure 5. PCB and component layout of the figure 4.
Voltage
Output
3.3V
5.1V
12V
Vi=8V to 55V
220µF
Output
63V
Ripple
C
10mV
10mV
12mV
C1=220µF/63V EKE
C2=2.7nF
C5=100nF
C6=100nF
C7=220nF/63V
C8=330µF/35V CG Sanyo
L1=126µH KoolMu 77120 - 65 Turns - 0.5mm
R1=20K
R2=9.1K
D1=STPS3L60U
1
220nF
C
7
V
CC
2.7nF
20K
R
C
Efficiency
1
2
=35V I
84 (%)
86 (%)
93 (%)
100nF
C
O
5
= 1.5A
5
3
2
22nF
C
4
7
L4971
9.1K
R
2
I
o
1
3mV (V
= 1.5A V
Line Regulation
100nF
6
C
V
6
3.3
5.1
O
12
15
18
24
D97IN749A
(V)
CC
8
4
PS3L60U
3mV
3mV
CC
=15 to 55V)
D1
ST
= 8 to 55V
L4971
R3(KΩ)
2.7
12
16
20
30
0
(77120)
126µH
L1
330µF
C
R4(KΩ)
8
4.7
4.7
4.7
4.7
4.7
V
CC
V
O
=3.3V/1.5A
Load Regulation
=35V I
R
R
3
4
6mV
6mV
4mV
O
= 0.5 to 1.5A
L4971
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