L5973AD STMicroelectronics, L5973AD Datasheet - Page 16

• Manufacturer Part Number: L5973AD
• Description: IC REG SW 2A STEPDOWN 8-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5973AD

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 2A
• Frequency - Switching: 500kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width) Exposed Pad, 8-eSOIC. 8-HSOIC
• Power - Output: 2.25W
• Output Voltage: 35 V
• Output Current: 2 A
• Input Voltage: 4 V to 36 V
• Switching Frequency: 500 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Low Dropout Operation: 100 % duty cycle
• For Use With: 497-4134 - EVAL BOARD FOR L5973 SERIES497-4133 - EVAL BOARD FOR L5973 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1417-5; 497-1417-5; 497-4565-5; E-L5973AD

Application ideas
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Application ideas
Figure 13. Positive buck-boost regulator
Figure 14. Buck-boost regulator
Figure 15. Dual output voltage with auxiliary winding
CERAMIC
CERAMIC
10μF
10V
10μF
C1
25V
C1
VIN = 5V
VIN = 5V
CERAMIC
10μF
25V
C2
220pF
3.3V
22nF
C3
C2
SYNC.
COMP
VREF
220pF
VCC
3.3V
22nF
C4
C3
4.7K
R3
SYNC.
COMP
VREF
VCC
6
8
2
4
Doc ID 9552 Rev 9
4.7K
INH
R3
L5973AD
3
6
8
2
4
INH
L5973AD
3
7
GND
D03IN1456
7
1
5
GND
D03IN1455
OUT
FB
1
5
OUT
FB
STPS2L25U
STPS25L25U
D1
N1/N2=2
Lp 22μH
24K
D1
2.7K
100μF
10V
C4
100μF
L1 15μH
16V
1N4148
C5
D2
47μF
VOUT=3.3V/
VOUT1=5V/
10V
VOUT=-12V/
C5
L5973AD
50mA
0.5A
0.6A