L6730 STMicroelectronics, L6730 Datasheet - Page 45

• Manufacturer Part Number: L6730
• Description: IC CTRLR ADJ STPDN SYNC 20-TSSOP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6730

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: Adj to 0.6V
• Frequency - Switching: 100kHz ~ 1MHz
• Voltage - Input: 1.8 ~ 14 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Output Voltage: 0.6 V
• Input Voltage: 1.8 V to 14 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• For Use With: 497-5868 - EVAL BOARD 30A 400KHZ L6730497-5501 - EVAL BOARD FOR L6730XX
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-5291-5

L6730 - L6730B
9
Efficiency
The following figures show the demo board efficiency versus load current for different values
of input voltage and switching frequency:
Figure 39. Demonstration board efficiency 400 kHz
Figure 40. Demonstration board efficiency 645 kHz
95.00%
90.00%
85.00%
80.00%
75.00%
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
1
1
V
V
V
IN = 5V
IN = 5V
IN = 5V
V
IN = 5V
V
IN = 12V
V
3
3
IN = 12V
Doc ID 11938 Rev 3
Fsw=400KHz
Fsw=645KHz
5
5
7
7
Iout (A)
Iout (A)
9
9
11
11
V
O
13
13
= 3.3V
V
O
= 3.3V
Efficiency
15
15
45/52