L4970A STMicroelectronics, L4970A Datasheet - Page 9

• Manufacturer Part Number: L4970A
• Description: IC BUCK SYNC ADJ 10A MULTIWATT15
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4970A

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5.1 ~ 40 V
• Current - Output: 10A
• Frequency - Switching: 200kHz
• Voltage - Input: 15 ~ 50 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Power - Output: 30W
• Output Voltage: 40 V
• Output Current: 10 A
• Input Voltage: 15 V to 50 V
• Switching Frequency: 180 KHz to 220 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Duty Cycle (max): 90 %
• Current, Input Bias: 0.4 μA
• Current, Output: 10 A
• Current, Supply: 13 mA
• Frequency, Oscillator: 200 kHz
• Package Type: Multiwatt
• Power Dissipation: 30 W
• Regulation, Line: 10 mV
• Regulation, Load: 20 mV
• Regulator Type: Switching
• Resistance, Thermal, Junction To Case: 1 °C/W
• Temperature, Operating, Range: -40 to +150 °C
• Voltage, Dropout: 1.1 V
• Voltage, Gain: 60 dB
• Voltage, Input: 50 V
• Voltage, Offset: 2 mV
• Voltage, Output: 5.1 V
• Voltage, Output, High: 5.5 V
• Voltage, Output, Low: 0.9 V
• Voltage, Supply, Rejection Ratio: 80 dB
• No. Of Outputs: 1
• Power Dissipation Pd: 30W
• No. Of Pins: 15
• Filter Terminals: Through Hole
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1410-5

Figure 6a: P.C. Board (components side) and Components Layout of Figure 5 (1:1 scale).
PARTS LIST
* 2 capacitors in parallel to increase input RMS current capability
** 3 capacitors in parallel to reduce total output ESR
R
R
R
R
R
R
R
R
R
R
R
D1 = MBR 1560CT (or 16A/60V or equivalent)
L1 = 40 H
1
2
3
4
5
6
7
8
9
10
11
= 30K
= 10K
= 15K
= 16K
= 22
= 4K7
= 10
= see tab. A
= OPTION
= 4K7
= 10
0,5W
C
C
C
C
C
C
C
**C
C
core 58071 MAGNETICS
27 TURNS Ø 1,3mm (AWG 16)
COGEMA 949178
1
3
7
8
9
10
11
15
, C
, C
= 390pF Film
= 22nF MKT 1817 (ERO)
= 2.2nF KP1830
12
= 220nF MKT
= 2.2nF MP1830
= 1 F Film
, C
2
4
, C
= 3300 F 63V
13
5
, C
, C
14
6
= 2.2 F
= 220 F 40V
L
EYF (ROE
L
EKR
Table A
Table B
SUGGESTED BOOTSTRAP CAPACITORS
Operating Frequency
12V
15V
18V
24V
V
f = 100KHz
f = 200KHz
f = 500KHz
f = 20KHz
f = 50KHz
0
4.7k
4.7k
4.7k
4.7k
R
9
Bootstrap Cap.c10
680nF
470nF
330nF
220nF
100nF
6.2kW
9.1k
12k
18k
R
L4970A
7
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