L5973D STMicroelectronics, L5973D Datasheet - Page 7

• Manufacturer Part Number: L5973D
• Description: IC REG SWITCHING STEPDOWN SOIC-8
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5973D

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 2.5A
• Frequency - Switching: 250kHz
• 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: 2.5 A
• Input Voltage: 4 V to 36 V
• Switching Frequency: 212 KHz to 280 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Current, Input Bias: 2.5 μA
• Current, Output: 300 μA
• Current, Supply: 2.5 mA
• Frequency, Oscillator: 250 kHz
• Package Type: HSOP-8
• Power Dissipation: 2.25 W
• Regulation, Line: 5 mV
• Regulation, Load: 8 mV
• Regulator Type: Low Dropout, Switching
• Temperature, Operating, Range: -40 to +150 °C
• Transconductance: 2.3
• Voltage, Gain: 57 dB
• Voltage, Input: 36 V
• Voltage, Output: 35 V
• Voltage, Output, High: 3.5 V
• Voltage, Output, Low: 0.4 V
• Voltage, Supply: 12 V
• No. Of Pins: 8
• Rohs Compliant: Yes
• Primary Input Voltage: 36V
• No. Of Outputs: 1
• Switching Frequency Max: 250kHz
• Supply Voltage Max: 36V
• 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

L5973D
4
Typical characteristics
Figure 3.
Figure 5.
Figure 7.
Vo (V)
Iq (mA)
3.312
3.308
3.284
1.22
1.21
3.304
3.296
3.292
3.288
3.276
1.24
1.23
1.25
1.2
Vo (V)
3.28
1.6
1.4
1.2
1.8
3.3
2
-50
-50
0
Vcc = 12V
Vo = 3.3V
Vcc = 12V
DC = 0%
Line regulation
Output voltage vs junction
temperature
Quiescent current vs junction
temperature
0
0
10
Tj (°C)
Tj (°C)
Vcc (V)
50
50
20
Tj = 25°C
Tj = 125°C
Vcc = 12V
100
100
30
Vcc=12V
150
150
40
Figure 4.
Figure 6.
Ishd (µA)
Fsw (KHz)
70
60
50
40
30
260
250
240
220
230
-50
-50
Vcc = 12V
Shutdown current vs junction
temperature
Switching frequency vs
junction temperature
Vcc = 12V
Vo = 3.3V
0
0
Typical characteristics
Tj (°C)
Tj (°C)
50
50
100
100
150
150
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