L6730B STMicroelectronics, L6730B Datasheet - Page 32

• Manufacturer Part Number: L6730B
• Description: IC CTRLR ADJ STPDN SYNC 20-TSSOP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6730B

• 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
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package: HTSSOP20
• 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

Device description
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effectively turned-on and the regulation can be lost. Thanks to the “bootstrap anti-
discharging system” the bootstrap cap is always kept charged. The following picture shows
the behaviour of the device in the following conditions: 12 V -> 3.3 V@0 A.
It can be observed that between two pulses trains the low-side is turned-on in order to keep
the bootstrap cap charged.
Figure 27. 12 V -> 3.3 V@0 A in no-sink
Minimum Bootstrap Voltage
Doc ID 11938 Rev 3
Pulse train
V
I
L6730 - L6730B
L
BOOT
V
PHASE