L6730 STMicroelectronics, L6730 Datasheet - Page 17

• 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
5.5
5.6
Error amplifier
Figure 7.
Soft-start
When both V
pin) the start-up phase takes place. Otherwise the SS pin is internally shorted to GND. At
start-up, a ramp is generated charging the external capacitor C
generator. The initial value for this current is 35 µA and charges the capacitor up to 0.5 V.
After that it becomes 10 µA until the final charge value of approximately 4 V (see
Figure 8.
Vss
Vss
Error amplifier reference
Device start-up: voltage at the SS pin
CC
V
CCDR
and V
EAREF
100K
IN
are above their turn-on thresholds (V
Doc ID 11938 Rev 3
0.5V
0.5V
0.5V
2.5V
1.2V
EXT
0.6V
4V
IN
SS
is monitored by the OCH
with an internal current
4.2V or 8.6V
1.25V
1.25V
4.2V
Error Amplifier Ref.
Vcc
Vin
4V
Device description
Vcc
Vin
Figure
t
t
17/52
5).