L4976D STMicroelectronics, L4976D Datasheet - Page 9

• Manufacturer Part Number: L4976D
• Description: IC REG SW 1A STEPDOWN 16-SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L4976D

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.5 ~ 50 V
• Current - Output: 1A
• Frequency - Switching: 100kHz
• 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
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L4976
Figure 8.
Figure 10. Switching frequency vs.
Figure 12. Dropout voltage between pin 5
(KHz)
3.377
3.376
3.375
3.374
3.373
3.372
3.371
3.370
0.5
0.4
0.3
0.2
0.1
0.0
(V)
∆
fsw
V
(V)
105
100
V
95
90
O
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
-50
0 5 10 15 20 25 30 35 40 45 50 V
Load regulation
junction temperature
and 4
0
50
Tj=125˚C
Tj=125˚C
Tj=25˚C
100
Tj=-25˚C
D97IN785
D97IN736
D97IN733
Tj(˚C)
CC
O
(V)
(A)
Figure 9.
Figure 11. Efficiency vs. output current
Figure 13. Efficiency vs. output current
(KHz)
107.5
105.0
102.5
100.0
(V)
0.5
0.4
0.3
0.2
0.1
0.0
∆
97.5
95.0
92.5
90.0
(%)
fsw
90
85
80
75
70
65
60
η
V
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
0
0 5 10 15 20 25 30 35 40 45 50 V
V
0.2 0.4 0.6 0.8 1.0 1.2 1.4 I
CC
=12V
Switching frequency vs. input
voltage
V
V
CC
CC
=48V
=24V
V
Typical charcteristics
CC
=8V
Tj=25˚C
Tj=125˚C
fsw=100KHz
V
O
=3.36V
Tj=-25˚C
D97IN739
D97IN735
D97IN736
CC
O
O
(A)
(A)
(V)
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