L6730 STMicroelectronics, L6730 Datasheet - Page 27

• 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
5.9
5.10
Working with a 12 V BUS, setting the UVLO at 8.6 V can be very helpful to limit the input
current in case of BUS fall.
Figure 22. Valley OCP (L6730B)
Adjustable masking time
By connecting the masking time pin to V
values for the peak current protection leading edge blanking time. This is useful to avoid any
false OCP trigger due to spikes and oscillations generated at the turn-on of the high-side
MOSFET(s). The amount of this noise depends very much on the layout, MOSFETs, free-
wheeling diode, switched current, and input voltage.
When good layout and medium current are used, the minimum masking time can be
chosen, while in case of higher noise, it is better to select the maximum masking time. By
connecting the t
GND results in about 260 ns masking time.
Multifunction pin (S/O/U L6730) (CC/O/U L6730B)
With this pin it is possible:
●
●
●
I
To enable disable the sink mode current capability (L6730) or the constant current
protection (L6730B) at the end of the soft-start
To enable or disable the latch-mode for the OVP
To set the UVLO threshold for 5 V BUS and 12 V busses
L
V
OUT
MASK
T
OFF
pin to V
CCDR
Doc ID 11938 Rev 3
the masking time is about 400 ns, while connecting it to
CCDR
or GND it is possible to select two different
T
OFF
Valley th
Device description
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